./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/chl-chromosome-symm.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version d790fecc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/chl-chromosome-symm.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB --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 23ca06a4d1d66eab783b29fc3ce31114eee62eb7d17a2452b84e2d73b8d92cfa --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-28 05:02:34,644 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-28 05:02:34,714 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-28 05:02:34,719 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-28 05:02:34,720 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-28 05:02:34,746 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-28 05:02:34,747 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-28 05:02:34,747 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-28 05:02:34,747 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-28 05:02:34,748 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-28 05:02:34,748 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-28 05:02:34,748 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-28 05:02:34,748 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-28 05:02:34,748 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-28 05:02:34,748 INFO L153 SettingsManager]: * Use SBE=true [2024-11-28 05:02:34,749 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-28 05:02:34,749 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-28 05:02:34,749 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-28 05:02:34,749 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-28 05:02:34,749 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-28 05:02:34,749 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-28 05:02:34,749 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-28 05:02:34,750 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-28 05:02:34,750 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-28 05:02:34,750 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-28 05:02:34,750 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-28 05:02:34,750 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-28 05:02:34,750 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-28 05:02:34,750 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-28 05:02:34,750 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 05:02:34,751 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 05:02:34,751 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 05:02:34,751 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 05:02:34,751 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-28 05:02:34,751 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 05:02:34,751 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 05:02:34,751 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 05:02:34,751 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 05:02:34,752 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-28 05:02:34,752 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-28 05:02:34,752 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-11-28 05:02:34,752 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-28 05:02:34,752 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-28 05:02:34,752 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-28 05:02:34,752 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-28 05:02:34,752 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-28 05:02:34,752 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-28 05:02:34,752 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-28 05:02:34,753 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_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB 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 -> 23ca06a4d1d66eab783b29fc3ce31114eee62eb7d17a2452b84e2d73b8d92cfa [2024-11-28 05:02:35,058 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-28 05:02:35,071 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-28 05:02:35,074 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-28 05:02:35,075 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-28 05:02:35,076 INFO L274 PluginConnector]: CDTParser initialized [2024-11-28 05:02:35,077 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/weaver/chl-chromosome-symm.wvr.c [2024-11-28 05:02:38,316 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/data/306735508/311ce3f39fdb4a25bcbc8d5cb7f1c6e9/FLAG6f5569b1d [2024-11-28 05:02:38,615 INFO L384 CDTParser]: Found 1 translation units. [2024-11-28 05:02:38,615 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/sv-benchmarks/c/weaver/chl-chromosome-symm.wvr.c [2024-11-28 05:02:38,624 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/data/306735508/311ce3f39fdb4a25bcbc8d5cb7f1c6e9/FLAG6f5569b1d [2024-11-28 05:02:38,640 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/data/306735508/311ce3f39fdb4a25bcbc8d5cb7f1c6e9 [2024-11-28 05:02:38,643 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-28 05:02:38,644 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-28 05:02:38,646 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-28 05:02:38,646 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-28 05:02:38,652 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-28 05:02:38,653 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 05:02:38" (1/1) ... [2024-11-28 05:02:38,654 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@454fb1bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:02:38, skipping insertion in model container [2024-11-28 05:02:38,654 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 05:02:38" (1/1) ... [2024-11-28 05:02:38,678 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-28 05:02:38,898 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_9fcfa608-dbf1-4bdc-952b-169371d2bca6/sv-benchmarks/c/weaver/chl-chromosome-symm.wvr.c[2721,2734] [2024-11-28 05:02:38,922 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 05:02:38,940 INFO L200 MainTranslator]: Completed pre-run [2024-11-28 05:02:38,982 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_9fcfa608-dbf1-4bdc-952b-169371d2bca6/sv-benchmarks/c/weaver/chl-chromosome-symm.wvr.c[2721,2734] [2024-11-28 05:02:38,991 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 05:02:39,015 INFO L204 MainTranslator]: Completed translation [2024-11-28 05:02:39,015 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:02:39 WrapperNode [2024-11-28 05:02:39,017 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-28 05:02:39,018 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-28 05:02:39,018 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-28 05:02:39,019 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-28 05:02:39,031 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:02:39" (1/1) ... [2024-11-28 05:02:39,038 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:02:39" (1/1) ... [2024-11-28 05:02:39,065 INFO L138 Inliner]: procedures = 24, calls = 27, calls flagged for inlining = 15, calls inlined = 19, statements flattened = 187 [2024-11-28 05:02:39,066 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-28 05:02:39,066 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-28 05:02:39,066 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-28 05:02:39,066 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-28 05:02:39,074 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:02:39" (1/1) ... [2024-11-28 05:02:39,074 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:02:39" (1/1) ... [2024-11-28 05:02:39,078 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:02:39" (1/1) ... [2024-11-28 05:02:39,094 INFO L175 MemorySlicer]: Split 8 memory accesses to 2 slices as follows [2, 6]. 75 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2024-11-28 05:02:39,094 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:02:39" (1/1) ... [2024-11-28 05:02:39,094 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:02:39" (1/1) ... [2024-11-28 05:02:39,102 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:02:39" (1/1) ... [2024-11-28 05:02:39,103 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:02:39" (1/1) ... [2024-11-28 05:02:39,108 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:02:39" (1/1) ... [2024-11-28 05:02:39,109 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:02:39" (1/1) ... [2024-11-28 05:02:39,110 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:02:39" (1/1) ... [2024-11-28 05:02:39,113 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-28 05:02:39,117 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-28 05:02:39,118 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-28 05:02:39,118 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-28 05:02:39,119 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:02:39" (1/1) ... [2024-11-28 05:02:39,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 05:02:39,142 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:02:39,159 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-28 05:02:39,162 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-28 05:02:39,191 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-28 05:02:39,191 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-28 05:02:39,191 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-28 05:02:39,191 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-28 05:02:39,191 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-28 05:02:39,191 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-28 05:02:39,191 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-28 05:02:39,192 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-28 05:02:39,192 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-28 05:02:39,192 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-28 05:02:39,192 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-28 05:02:39,192 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-28 05:02:39,192 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-28 05:02:39,192 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-28 05:02:39,194 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-28 05:02:39,335 INFO L234 CfgBuilder]: Building ICFG [2024-11-28 05:02:39,337 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-28 05:02:39,763 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-28 05:02:39,763 INFO L283 CfgBuilder]: Performing block encoding [2024-11-28 05:02:40,229 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-28 05:02:40,230 INFO L312 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-28 05:02:40,230 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 05:02:40 BoogieIcfgContainer [2024-11-28 05:02:40,230 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-28 05:02:40,233 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-28 05:02:40,233 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-28 05:02:40,238 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-28 05:02:40,238 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 05:02:38" (1/3) ... [2024-11-28 05:02:40,239 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58ae65e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 05:02:40, skipping insertion in model container [2024-11-28 05:02:40,239 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:02:39" (2/3) ... [2024-11-28 05:02:40,239 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58ae65e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 05:02:40, skipping insertion in model container [2024-11-28 05:02:40,240 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 05:02:40" (3/3) ... [2024-11-28 05:02:40,241 INFO L128 eAbstractionObserver]: Analyzing ICFG chl-chromosome-symm.wvr.c [2024-11-28 05:02:40,259 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-28 05:02:40,261 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG chl-chromosome-symm.wvr.c that has 3 procedures, 19 locations, 1 initial locations, 4 loop locations, and 1 error locations. [2024-11-28 05:02:40,261 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-28 05:02:40,325 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-28 05:02:40,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 25 places, 22 transitions, 58 flow [2024-11-28 05:02:40,408 INFO L124 PetriNetUnfolderBase]: 4/20 cut-off events. [2024-11-28 05:02:40,410 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-28 05:02:40,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29 conditions, 20 events. 4/20 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 11 event pairs, 0 based on Foata normal form. 0/15 useless extension candidates. Maximal degree in co-relation 12. Up to 2 conditions per place. [2024-11-28 05:02:40,415 INFO L82 GeneralOperation]: Start removeDead. Operand has 25 places, 22 transitions, 58 flow [2024-11-28 05:02:40,419 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 22 places, 19 transitions, 50 flow [2024-11-28 05:02:40,437 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-28 05:02:40,455 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;@64452070, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-28 05:02:40,458 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-11-28 05:02:40,475 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-28 05:02:40,477 INFO L124 PetriNetUnfolderBase]: 4/18 cut-off events. [2024-11-28 05:02:40,477 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-28 05:02:40,478 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:02:40,478 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:02:40,479 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:02:40,485 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:02:40,487 INFO L85 PathProgramCache]: Analyzing trace with hash -1978224543, now seen corresponding path program 1 times [2024-11-28 05:02:40,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:02:40,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720665674] [2024-11-28 05:02:40,496 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:02:40,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:02:40,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:02:41,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:02:41,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:02:41,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720665674] [2024-11-28 05:02:41,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720665674] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:02:41,047 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:02:41,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 05:02:41,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540401317] [2024-11-28 05:02:41,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:02:41,058 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 05:02:41,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:02:41,092 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 05:02:41,093 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 05:02:41,095 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 05:02:41,097 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 19 transitions, 50 flow. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:02:41,097 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:02:41,098 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 05:02:41,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:02:41,221 INFO L124 PetriNetUnfolderBase]: 39/74 cut-off events. [2024-11-28 05:02:41,222 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-11-28 05:02:41,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 163 conditions, 74 events. 39/74 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 121 event pairs, 22 based on Foata normal form. 0/57 useless extension candidates. Maximal degree in co-relation 120. Up to 72 conditions per place. [2024-11-28 05:02:41,224 INFO L140 encePairwiseOnDemand]: 17/22 looper letters, 16 selfloop transitions, 4 changer transitions 0/21 dead transitions. [2024-11-28 05:02:41,224 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 21 transitions, 94 flow [2024-11-28 05:02:41,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 05:02:41,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-28 05:02:41,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 31 transitions. [2024-11-28 05:02:41,241 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4696969696969697 [2024-11-28 05:02:41,243 INFO L175 Difference]: Start difference. First operand has 22 places, 19 transitions, 50 flow. Second operand 3 states and 31 transitions. [2024-11-28 05:02:41,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 21 transitions, 94 flow [2024-11-28 05:02:41,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 21 transitions, 86 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-28 05:02:41,253 INFO L231 Difference]: Finished difference. Result has 21 places, 21 transitions, 64 flow [2024-11-28 05:02:41,256 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=64, PETRI_PLACES=21, PETRI_TRANSITIONS=21} [2024-11-28 05:02:41,262 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, -1 predicate places. [2024-11-28 05:02:41,262 INFO L471 AbstractCegarLoop]: Abstraction has has 21 places, 21 transitions, 64 flow [2024-11-28 05:02:41,262 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:02:41,263 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:02:41,263 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:02:41,263 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-28 05:02:41,263 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:02:41,264 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:02:41,264 INFO L85 PathProgramCache]: Analyzing trace with hash 272240645, now seen corresponding path program 1 times [2024-11-28 05:02:41,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:02:41,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778364164] [2024-11-28 05:02:41,264 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:02:41,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:02:41,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:02:41,563 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 05:02:41,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:02:41,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778364164] [2024-11-28 05:02:41,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778364164] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:02:41,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648481411] [2024-11-28 05:02:41,563 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:02:41,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:02:41,564 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:02:41,568 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:02:41,570 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-28 05:02:41,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:02:41,721 INFO L256 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-28 05:02:41,725 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:02:41,815 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 05:02:41,815 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:02:41,850 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 05:02:41,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648481411] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:02:41,850 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:02:41,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2024-11-28 05:02:41,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615442386] [2024-11-28 05:02:41,851 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:02:41,852 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-28 05:02:41,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:02:41,852 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-28 05:02:41,852 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-11-28 05:02:41,853 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 05:02:41,854 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 21 transitions, 64 flow. Second operand has 8 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 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) [2024-11-28 05:02:41,854 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:02:41,854 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 05:02:41,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:02:42,053 INFO L124 PetriNetUnfolderBase]: 39/80 cut-off events. [2024-11-28 05:02:42,053 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-28 05:02:42,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 182 conditions, 80 events. 39/80 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 122 event pairs, 22 based on Foata normal form. 3/67 useless extension candidates. Maximal degree in co-relation 152. Up to 72 conditions per place. [2024-11-28 05:02:42,058 INFO L140 encePairwiseOnDemand]: 17/22 looper letters, 16 selfloop transitions, 10 changer transitions 0/27 dead transitions. [2024-11-28 05:02:42,058 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 27 transitions, 140 flow [2024-11-28 05:02:42,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 05:02:42,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-28 05:02:42,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 50 transitions. [2024-11-28 05:02:42,059 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3787878787878788 [2024-11-28 05:02:42,059 INFO L175 Difference]: Start difference. First operand has 21 places, 21 transitions, 64 flow. Second operand 6 states and 50 transitions. [2024-11-28 05:02:42,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 27 transitions, 140 flow [2024-11-28 05:02:42,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 27 transitions, 136 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-28 05:02:42,061 INFO L231 Difference]: Finished difference. Result has 28 places, 27 transitions, 126 flow [2024-11-28 05:02:42,062 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=126, PETRI_PLACES=28, PETRI_TRANSITIONS=27} [2024-11-28 05:02:42,064 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 6 predicate places. [2024-11-28 05:02:42,065 INFO L471 AbstractCegarLoop]: Abstraction has has 28 places, 27 transitions, 126 flow [2024-11-28 05:02:42,066 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 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) [2024-11-28 05:02:42,066 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:02:42,066 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:02:42,077 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-28 05:02:42,275 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:02:42,275 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:02:42,276 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:02:42,276 INFO L85 PathProgramCache]: Analyzing trace with hash -2100492651, now seen corresponding path program 2 times [2024-11-28 05:02:42,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:02:42,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060283194] [2024-11-28 05:02:42,277 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:02:42,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:02:42,340 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-28 05:02:42,340 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:02:42,672 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-28 05:02:42,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:02:42,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060283194] [2024-11-28 05:02:42,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060283194] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:02:42,672 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:02:42,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 05:02:42,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718549490] [2024-11-28 05:02:42,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:02:42,673 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 05:02:42,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:02:42,673 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 05:02:42,674 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-28 05:02:42,674 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 05:02:42,674 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 27 transitions, 126 flow. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:02:42,674 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:02:42,674 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 05:02:42,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:02:42,823 INFO L124 PetriNetUnfolderBase]: 61/124 cut-off events. [2024-11-28 05:02:42,823 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-28 05:02:42,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 293 conditions, 124 events. 61/124 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 289 event pairs, 22 based on Foata normal form. 3/98 useless extension candidates. Maximal degree in co-relation 232. Up to 80 conditions per place. [2024-11-28 05:02:42,825 INFO L140 encePairwiseOnDemand]: 18/22 looper letters, 37 selfloop transitions, 3 changer transitions 2/43 dead transitions. [2024-11-28 05:02:42,825 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 43 transitions, 246 flow [2024-11-28 05:02:42,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 05:02:42,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 05:02:42,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 47 transitions. [2024-11-28 05:02:42,826 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5340909090909091 [2024-11-28 05:02:42,826 INFO L175 Difference]: Start difference. First operand has 28 places, 27 transitions, 126 flow. Second operand 4 states and 47 transitions. [2024-11-28 05:02:42,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 43 transitions, 246 flow [2024-11-28 05:02:42,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 43 transitions, 230 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-11-28 05:02:42,829 INFO L231 Difference]: Finished difference. Result has 32 places, 29 transitions, 130 flow [2024-11-28 05:02:42,830 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=130, PETRI_PLACES=32, PETRI_TRANSITIONS=29} [2024-11-28 05:02:42,830 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 10 predicate places. [2024-11-28 05:02:42,830 INFO L471 AbstractCegarLoop]: Abstraction has has 32 places, 29 transitions, 130 flow [2024-11-28 05:02:42,831 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:02:42,831 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:02:42,831 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:02:42,831 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-28 05:02:42,831 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:02:42,832 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:02:42,832 INFO L85 PathProgramCache]: Analyzing trace with hash -483353301, now seen corresponding path program 3 times [2024-11-28 05:02:42,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:02:42,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135978098] [2024-11-28 05:02:42,832 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 05:02:42,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:02:42,888 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-11-28 05:02:42,890 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:02:43,183 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-28 05:02:43,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:02:43,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135978098] [2024-11-28 05:02:43,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135978098] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:02:43,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:02:43,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 05:02:43,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210366265] [2024-11-28 05:02:43,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:02:43,185 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 05:02:43,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:02:43,188 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 05:02:43,188 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 05:02:43,189 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 05:02:43,189 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 29 transitions, 130 flow. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:02:43,189 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:02:43,189 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 05:02:43,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:02:43,416 INFO L124 PetriNetUnfolderBase]: 93/186 cut-off events. [2024-11-28 05:02:43,418 INFO L125 PetriNetUnfolderBase]: For 94/94 co-relation queries the response was YES. [2024-11-28 05:02:43,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 501 conditions, 186 events. 93/186 cut-off events. For 94/94 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 542 event pairs, 39 based on Foata normal form. 2/151 useless extension candidates. Maximal degree in co-relation 445. Up to 126 conditions per place. [2024-11-28 05:02:43,422 INFO L140 encePairwiseOnDemand]: 18/22 looper letters, 42 selfloop transitions, 3 changer transitions 0/46 dead transitions. [2024-11-28 05:02:43,423 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 46 transitions, 282 flow [2024-11-28 05:02:43,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 05:02:43,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 05:02:43,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 44 transitions. [2024-11-28 05:02:43,426 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-11-28 05:02:43,426 INFO L175 Difference]: Start difference. First operand has 32 places, 29 transitions, 130 flow. Second operand 4 states and 44 transitions. [2024-11-28 05:02:43,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 46 transitions, 282 flow [2024-11-28 05:02:43,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 46 transitions, 271 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-11-28 05:02:43,431 INFO L231 Difference]: Finished difference. Result has 36 places, 31 transitions, 146 flow [2024-11-28 05:02:43,431 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=146, PETRI_PLACES=36, PETRI_TRANSITIONS=31} [2024-11-28 05:02:43,431 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 14 predicate places. [2024-11-28 05:02:43,432 INFO L471 AbstractCegarLoop]: Abstraction has has 36 places, 31 transitions, 146 flow [2024-11-28 05:02:43,432 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:02:43,432 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:02:43,432 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:02:43,432 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-28 05:02:43,432 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:02:43,433 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:02:43,434 INFO L85 PathProgramCache]: Analyzing trace with hash 541848127, now seen corresponding path program 4 times [2024-11-28 05:02:43,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:02:43,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687898000] [2024-11-28 05:02:43,435 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 05:02:43,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:02:43,480 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 05:02:43,480 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:02:43,720 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-28 05:02:43,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:02:43,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687898000] [2024-11-28 05:02:43,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687898000] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:02:43,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84845259] [2024-11-28 05:02:43,721 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 05:02:43,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:02:43,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:02:43,726 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:02:43,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-28 05:02:43,878 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 05:02:43,878 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:02:43,882 INFO L256 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-28 05:02:43,883 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:02:43,981 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-28 05:02:43,981 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:02:44,046 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-28 05:02:44,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84845259] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:02:44,047 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:02:44,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-11-28 05:02:44,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956376783] [2024-11-28 05:02:44,047 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:02:44,048 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-28 05:02:44,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:02:44,049 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-28 05:02:44,050 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2024-11-28 05:02:44,050 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 05:02:44,050 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 31 transitions, 146 flow. Second operand has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 13 states have internal predecessors, (66), 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) [2024-11-28 05:02:44,050 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:02:44,050 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 05:02:44,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:02:44,256 INFO L124 PetriNetUnfolderBase]: 93/188 cut-off events. [2024-11-28 05:02:44,256 INFO L125 PetriNetUnfolderBase]: For 163/163 co-relation queries the response was YES. [2024-11-28 05:02:44,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 578 conditions, 188 events. 93/188 cut-off events. For 163/163 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 509 event pairs, 67 based on Foata normal form. 1/164 useless extension candidates. Maximal degree in co-relation 512. Up to 175 conditions per place. [2024-11-28 05:02:44,260 INFO L140 encePairwiseOnDemand]: 17/22 looper letters, 20 selfloop transitions, 12 changer transitions 0/33 dead transitions. [2024-11-28 05:02:44,260 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 33 transitions, 222 flow [2024-11-28 05:02:44,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-28 05:02:44,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-28 05:02:44,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 51 transitions. [2024-11-28 05:02:44,262 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.33116883116883117 [2024-11-28 05:02:44,262 INFO L175 Difference]: Start difference. First operand has 36 places, 31 transitions, 146 flow. Second operand 7 states and 51 transitions. [2024-11-28 05:02:44,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 33 transitions, 222 flow [2024-11-28 05:02:44,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 33 transitions, 218 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-28 05:02:44,267 INFO L231 Difference]: Finished difference. Result has 42 places, 33 transitions, 188 flow [2024-11-28 05:02:44,267 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=188, PETRI_PLACES=42, PETRI_TRANSITIONS=33} [2024-11-28 05:02:44,268 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 20 predicate places. [2024-11-28 05:02:44,268 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 33 transitions, 188 flow [2024-11-28 05:02:44,268 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 13 states have internal predecessors, (66), 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) [2024-11-28 05:02:44,268 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:02:44,268 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:02:44,282 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-28 05:02:44,469 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:02:44,470 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:02:44,471 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:02:44,471 INFO L85 PathProgramCache]: Analyzing trace with hash -1832285277, now seen corresponding path program 5 times [2024-11-28 05:02:44,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:02:44,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031904981] [2024-11-28 05:02:44,472 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 05:02:44,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:02:44,548 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-11-28 05:02:44,548 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:02:44,869 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-28 05:02:44,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:02:44,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031904981] [2024-11-28 05:02:44,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031904981] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:02:44,870 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:02:44,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 05:02:44,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469806190] [2024-11-28 05:02:44,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:02:44,870 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 05:02:44,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:02:44,871 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 05:02:44,871 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 05:02:44,871 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 05:02:44,872 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 33 transitions, 188 flow. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:02:44,872 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:02:44,872 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 05:02:44,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:02:45,071 INFO L124 PetriNetUnfolderBase]: 105/208 cut-off events. [2024-11-28 05:02:45,071 INFO L125 PetriNetUnfolderBase]: For 126/126 co-relation queries the response was YES. [2024-11-28 05:02:45,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 620 conditions, 208 events. 105/208 cut-off events. For 126/126 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 625 event pairs, 39 based on Foata normal form. 8/190 useless extension candidates. Maximal degree in co-relation 542. Up to 126 conditions per place. [2024-11-28 05:02:45,076 INFO L140 encePairwiseOnDemand]: 18/22 looper letters, 45 selfloop transitions, 4 changer transitions 0/50 dead transitions. [2024-11-28 05:02:45,077 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 50 transitions, 343 flow [2024-11-28 05:02:45,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 05:02:45,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 05:02:45,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 46 transitions. [2024-11-28 05:02:45,079 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5227272727272727 [2024-11-28 05:02:45,079 INFO L175 Difference]: Start difference. First operand has 42 places, 33 transitions, 188 flow. Second operand 4 states and 46 transitions. [2024-11-28 05:02:45,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 50 transitions, 343 flow [2024-11-28 05:02:45,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 50 transitions, 319 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-11-28 05:02:45,086 INFO L231 Difference]: Finished difference. Result has 43 places, 35 transitions, 189 flow [2024-11-28 05:02:45,087 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=189, PETRI_PLACES=43, PETRI_TRANSITIONS=35} [2024-11-28 05:02:45,087 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 21 predicate places. [2024-11-28 05:02:45,087 INFO L471 AbstractCegarLoop]: Abstraction has has 43 places, 35 transitions, 189 flow [2024-11-28 05:02:45,088 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:02:45,088 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:02:45,088 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:02:45,088 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-28 05:02:45,088 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:02:45,089 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:02:45,089 INFO L85 PathProgramCache]: Analyzing trace with hash -1152974825, now seen corresponding path program 6 times [2024-11-28 05:02:45,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:02:45,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896982099] [2024-11-28 05:02:45,089 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 05:02:45,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:02:45,129 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2024-11-28 05:02:45,129 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:02:45,317 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-28 05:02:45,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:02:45,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896982099] [2024-11-28 05:02:45,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896982099] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:02:45,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:02:45,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 05:02:45,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867927030] [2024-11-28 05:02:45,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:02:45,318 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 05:02:45,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:02:45,318 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 05:02:45,318 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 05:02:45,318 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 05:02:45,318 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 35 transitions, 189 flow. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:02:45,318 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:02:45,319 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 05:02:45,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:02:45,479 INFO L124 PetriNetUnfolderBase]: 89/174 cut-off events. [2024-11-28 05:02:45,479 INFO L125 PetriNetUnfolderBase]: For 208/208 co-relation queries the response was YES. [2024-11-28 05:02:45,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 582 conditions, 174 events. 89/174 cut-off events. For 208/208 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 459 event pairs, 12 based on Foata normal form. 8/159 useless extension candidates. Maximal degree in co-relation 513. Up to 115 conditions per place. [2024-11-28 05:02:45,482 INFO L140 encePairwiseOnDemand]: 16/22 looper letters, 38 selfloop transitions, 6 changer transitions 1/46 dead transitions. [2024-11-28 05:02:45,482 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 46 transitions, 324 flow [2024-11-28 05:02:45,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 05:02:45,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 05:02:45,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 40 transitions. [2024-11-28 05:02:45,483 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-11-28 05:02:45,483 INFO L175 Difference]: Start difference. First operand has 43 places, 35 transitions, 189 flow. Second operand 4 states and 40 transitions. [2024-11-28 05:02:45,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 46 transitions, 324 flow [2024-11-28 05:02:45,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 46 transitions, 317 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-28 05:02:45,488 INFO L231 Difference]: Finished difference. Result has 47 places, 36 transitions, 212 flow [2024-11-28 05:02:45,488 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=212, PETRI_PLACES=47, PETRI_TRANSITIONS=36} [2024-11-28 05:02:45,488 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 25 predicate places. [2024-11-28 05:02:45,489 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 36 transitions, 212 flow [2024-11-28 05:02:45,489 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:02:45,489 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:02:45,489 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:02:45,489 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-28 05:02:45,489 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:02:45,490 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:02:45,490 INFO L85 PathProgramCache]: Analyzing trace with hash 1985161844, now seen corresponding path program 1 times [2024-11-28 05:02:45,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:02:45,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845334000] [2024-11-28 05:02:45,490 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:02:45,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:02:45,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:02:45,812 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:02:45,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:02:45,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845334000] [2024-11-28 05:02:45,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845334000] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:02:45,813 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:02:45,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 05:02:45,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174717061] [2024-11-28 05:02:45,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:02:45,814 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 05:02:45,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:02:45,815 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 05:02:45,815 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 05:02:45,815 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 05:02:45,815 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 36 transitions, 212 flow. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 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) [2024-11-28 05:02:45,815 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:02:45,815 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 05:02:45,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:02:45,963 INFO L124 PetriNetUnfolderBase]: 90/173 cut-off events. [2024-11-28 05:02:45,964 INFO L125 PetriNetUnfolderBase]: For 259/259 co-relation queries the response was YES. [2024-11-28 05:02:45,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 588 conditions, 173 events. 90/173 cut-off events. For 259/259 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 446 event pairs, 15 based on Foata normal form. 7/155 useless extension candidates. Maximal degree in co-relation 516. Up to 135 conditions per place. [2024-11-28 05:02:45,966 INFO L140 encePairwiseOnDemand]: 16/22 looper letters, 41 selfloop transitions, 7 changer transitions 1/50 dead transitions. [2024-11-28 05:02:45,966 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 50 transitions, 361 flow [2024-11-28 05:02:45,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 05:02:45,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 05:02:45,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 42 transitions. [2024-11-28 05:02:45,967 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4772727272727273 [2024-11-28 05:02:45,967 INFO L175 Difference]: Start difference. First operand has 47 places, 36 transitions, 212 flow. Second operand 4 states and 42 transitions. [2024-11-28 05:02:45,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 50 transitions, 361 flow [2024-11-28 05:02:45,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 50 transitions, 345 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-11-28 05:02:45,972 INFO L231 Difference]: Finished difference. Result has 47 places, 38 transitions, 239 flow [2024-11-28 05:02:45,972 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=199, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=239, PETRI_PLACES=47, PETRI_TRANSITIONS=38} [2024-11-28 05:02:45,973 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 25 predicate places. [2024-11-28 05:02:45,973 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 38 transitions, 239 flow [2024-11-28 05:02:45,973 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 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) [2024-11-28 05:02:45,973 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:02:45,973 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:02:45,973 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-28 05:02:45,974 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:02:45,974 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:02:45,974 INFO L85 PathProgramCache]: Analyzing trace with hash 1934471430, now seen corresponding path program 2 times [2024-11-28 05:02:45,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:02:45,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260875368] [2024-11-28 05:02:45,975 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:02:45,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:02:46,005 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-28 05:02:46,005 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:02:46,186 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:02:46,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:02:46,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260875368] [2024-11-28 05:02:46,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260875368] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:02:46,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:02:46,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 05:02:46,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826439422] [2024-11-28 05:02:46,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:02:46,187 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 05:02:46,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:02:46,188 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 05:02:46,188 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 05:02:46,188 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 05:02:46,188 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 38 transitions, 239 flow. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 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) [2024-11-28 05:02:46,189 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:02:46,189 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 05:02:46,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:02:46,348 INFO L124 PetriNetUnfolderBase]: 80/153 cut-off events. [2024-11-28 05:02:46,349 INFO L125 PetriNetUnfolderBase]: For 413/413 co-relation queries the response was YES. [2024-11-28 05:02:46,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 560 conditions, 153 events. 80/153 cut-off events. For 413/413 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 361 event pairs, 25 based on Foata normal form. 7/137 useless extension candidates. Maximal degree in co-relation 487. Up to 118 conditions per place. [2024-11-28 05:02:46,350 INFO L140 encePairwiseOnDemand]: 18/22 looper letters, 41 selfloop transitions, 7 changer transitions 1/50 dead transitions. [2024-11-28 05:02:46,351 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 50 transitions, 390 flow [2024-11-28 05:02:46,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 05:02:46,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 05:02:46,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 43 transitions. [2024-11-28 05:02:46,355 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.48863636363636365 [2024-11-28 05:02:46,355 INFO L175 Difference]: Start difference. First operand has 47 places, 38 transitions, 239 flow. Second operand 4 states and 43 transitions. [2024-11-28 05:02:46,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 50 transitions, 390 flow [2024-11-28 05:02:46,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 50 transitions, 381 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-11-28 05:02:46,359 INFO L231 Difference]: Finished difference. Result has 50 places, 39 transitions, 262 flow [2024-11-28 05:02:46,359 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=231, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=262, PETRI_PLACES=50, PETRI_TRANSITIONS=39} [2024-11-28 05:02:46,360 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 28 predicate places. [2024-11-28 05:02:46,361 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 39 transitions, 262 flow [2024-11-28 05:02:46,362 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 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) [2024-11-28 05:02:46,362 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:02:46,362 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:02:46,362 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-28 05:02:46,362 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:02:46,363 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:02:46,363 INFO L85 PathProgramCache]: Analyzing trace with hash -1280401060, now seen corresponding path program 1 times [2024-11-28 05:02:46,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:02:46,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340879124] [2024-11-28 05:02:46,363 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:02:46,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:02:46,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:02:47,812 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-28 05:02:47,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:02:47,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340879124] [2024-11-28 05:02:47,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340879124] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:02:47,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026571543] [2024-11-28 05:02:47,813 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:02:47,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:02:47,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:02:47,818 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:02:47,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-28 05:02:47,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:02:47,971 INFO L256 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-28 05:02:47,974 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:02:48,170 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:02:48,171 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2024-11-28 05:02:48,236 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-28 05:02:48,236 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:02:49,085 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-11-28 05:02:49,086 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 126 treesize of output 79 [2024-11-28 05:02:49,145 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-28 05:02:49,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026571543] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:02:49,146 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:02:49,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 22 [2024-11-28 05:02:49,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885895185] [2024-11-28 05:02:49,146 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:02:49,146 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-28 05:02:49,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:02:49,147 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-28 05:02:49,147 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2024-11-28 05:02:49,148 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 05:02:49,148 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 39 transitions, 262 flow. Second operand has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 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) [2024-11-28 05:02:49,148 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:02:49,149 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 05:02:49,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:02:49,985 INFO L124 PetriNetUnfolderBase]: 139/258 cut-off events. [2024-11-28 05:02:49,985 INFO L125 PetriNetUnfolderBase]: For 614/614 co-relation queries the response was YES. [2024-11-28 05:02:49,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 937 conditions, 258 events. 139/258 cut-off events. For 614/614 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 791 event pairs, 12 based on Foata normal form. 1/208 useless extension candidates. Maximal degree in co-relation 863. Up to 99 conditions per place. [2024-11-28 05:02:49,988 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 55 selfloop transitions, 20 changer transitions 3/79 dead transitions. [2024-11-28 05:02:49,988 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 79 transitions, 584 flow [2024-11-28 05:02:49,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-28 05:02:49,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-28 05:02:49,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 96 transitions. [2024-11-28 05:02:49,990 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.36363636363636365 [2024-11-28 05:02:49,991 INFO L175 Difference]: Start difference. First operand has 50 places, 39 transitions, 262 flow. Second operand 12 states and 96 transitions. [2024-11-28 05:02:49,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 79 transitions, 584 flow [2024-11-28 05:02:49,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 79 transitions, 550 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-11-28 05:02:49,996 INFO L231 Difference]: Finished difference. Result has 62 places, 49 transitions, 372 flow [2024-11-28 05:02:49,996 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=244, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=372, PETRI_PLACES=62, PETRI_TRANSITIONS=49} [2024-11-28 05:02:49,997 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 40 predicate places. [2024-11-28 05:02:49,997 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 49 transitions, 372 flow [2024-11-28 05:02:49,997 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 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) [2024-11-28 05:02:49,997 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:02:49,997 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:02:50,008 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-28 05:02:50,201 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:02:50,201 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:02:50,202 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:02:50,202 INFO L85 PathProgramCache]: Analyzing trace with hash 5515490, now seen corresponding path program 2 times [2024-11-28 05:02:50,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:02:50,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066128658] [2024-11-28 05:02:50,202 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:02:50,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:02:50,321 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:02:50,321 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:02:51,334 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-28 05:02:51,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:02:51,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066128658] [2024-11-28 05:02:51,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066128658] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:02:51,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052331903] [2024-11-28 05:02:51,334 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:02:51,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:02:51,335 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:02:51,337 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:02:51,341 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-28 05:02:51,481 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:02:51,481 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:02:51,484 INFO L256 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-28 05:02:51,487 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:02:51,623 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:02:51,623 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2024-11-28 05:02:51,649 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-28 05:02:51,650 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:02:52,201 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2024-11-28 05:02:52,202 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 107 [2024-11-28 05:02:52,356 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-28 05:02:52,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052331903] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:02:52,356 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:02:52,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 17 [2024-11-28 05:02:52,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627019899] [2024-11-28 05:02:52,357 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:02:52,357 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-28 05:02:52,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:02:52,358 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-28 05:02:52,358 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2024-11-28 05:02:52,358 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 05:02:52,358 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 49 transitions, 372 flow. Second operand has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 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) [2024-11-28 05:02:52,358 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:02:52,358 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 05:02:52,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:02:52,864 INFO L124 PetriNetUnfolderBase]: 159/293 cut-off events. [2024-11-28 05:02:52,864 INFO L125 PetriNetUnfolderBase]: For 771/771 co-relation queries the response was YES. [2024-11-28 05:02:52,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1175 conditions, 293 events. 159/293 cut-off events. For 771/771 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 951 event pairs, 23 based on Foata normal form. 1/271 useless extension candidates. Maximal degree in co-relation 1095. Up to 218 conditions per place. [2024-11-28 05:02:52,868 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 49 selfloop transitions, 20 changer transitions 1/71 dead transitions. [2024-11-28 05:02:52,868 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 71 transitions, 605 flow [2024-11-28 05:02:52,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-28 05:02:52,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-28 05:02:52,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 79 transitions. [2024-11-28 05:02:52,872 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.32644628099173556 [2024-11-28 05:02:52,872 INFO L175 Difference]: Start difference. First operand has 62 places, 49 transitions, 372 flow. Second operand 11 states and 79 transitions. [2024-11-28 05:02:52,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 71 transitions, 605 flow [2024-11-28 05:02:52,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 71 transitions, 577 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-11-28 05:02:52,881 INFO L231 Difference]: Finished difference. Result has 72 places, 56 transitions, 450 flow [2024-11-28 05:02:52,881 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=346, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=450, PETRI_PLACES=72, PETRI_TRANSITIONS=56} [2024-11-28 05:02:52,882 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 50 predicate places. [2024-11-28 05:02:52,882 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 56 transitions, 450 flow [2024-11-28 05:02:52,882 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 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) [2024-11-28 05:02:52,883 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:02:52,884 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:02:52,894 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-28 05:02:53,084 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:02:53,085 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:02:53,086 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:02:53,086 INFO L85 PathProgramCache]: Analyzing trace with hash -751207844, now seen corresponding path program 3 times [2024-11-28 05:02:53,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:02:53,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852337629] [2024-11-28 05:02:53,086 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 05:02:53,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:02:53,153 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 05:02:53,153 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:02:54,046 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-28 05:02:54,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:02:54,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852337629] [2024-11-28 05:02:54,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852337629] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:02:54,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259516219] [2024-11-28 05:02:54,047 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 05:02:54,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:02:54,047 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:02:54,049 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:02:54,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-28 05:02:54,186 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 05:02:54,186 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:02:54,188 INFO L256 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-28 05:02:54,191 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:02:54,306 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:02:54,307 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2024-11-28 05:02:54,381 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-28 05:02:54,382 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:02:54,903 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2024-11-28 05:02:54,903 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 107 [2024-11-28 05:02:55,058 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-28 05:02:55,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259516219] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:02:55,058 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:02:55,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 20 [2024-11-28 05:02:55,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505761934] [2024-11-28 05:02:55,059 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:02:55,059 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-28 05:02:55,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:02:55,060 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-28 05:02:55,060 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2024-11-28 05:02:55,060 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 05:02:55,061 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 56 transitions, 450 flow. Second operand has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:02:55,061 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:02:55,061 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 05:02:55,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:02:55,782 INFO L124 PetriNetUnfolderBase]: 161/301 cut-off events. [2024-11-28 05:02:55,782 INFO L125 PetriNetUnfolderBase]: For 992/992 co-relation queries the response was YES. [2024-11-28 05:02:55,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1320 conditions, 301 events. 161/301 cut-off events. For 992/992 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1002 event pairs, 26 based on Foata normal form. 1/297 useless extension candidates. Maximal degree in co-relation 1240. Up to 215 conditions per place. [2024-11-28 05:02:55,785 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 50 selfloop transitions, 22 changer transitions 2/75 dead transitions. [2024-11-28 05:02:55,786 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 75 transitions, 684 flow [2024-11-28 05:02:55,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-28 05:02:55,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-28 05:02:55,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 85 transitions. [2024-11-28 05:02:55,787 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.32196969696969696 [2024-11-28 05:02:55,787 INFO L175 Difference]: Start difference. First operand has 72 places, 56 transitions, 450 flow. Second operand 12 states and 85 transitions. [2024-11-28 05:02:55,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 75 transitions, 684 flow [2024-11-28 05:02:55,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 75 transitions, 626 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-11-28 05:02:55,795 INFO L231 Difference]: Finished difference. Result has 78 places, 59 transitions, 476 flow [2024-11-28 05:02:55,795 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=402, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=476, PETRI_PLACES=78, PETRI_TRANSITIONS=59} [2024-11-28 05:02:55,796 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 56 predicate places. [2024-11-28 05:02:55,796 INFO L471 AbstractCegarLoop]: Abstraction has has 78 places, 59 transitions, 476 flow [2024-11-28 05:02:55,796 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:02:55,796 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:02:55,796 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:02:55,806 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-28 05:02:56,000 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:02:56,000 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:02:56,001 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:02:56,001 INFO L85 PathProgramCache]: Analyzing trace with hash -823026460, now seen corresponding path program 4 times [2024-11-28 05:02:56,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:02:56,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103034052] [2024-11-28 05:02:56,001 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 05:02:56,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:02:56,065 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 05:02:56,065 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:02:56,853 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-28 05:02:56,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:02:56,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103034052] [2024-11-28 05:02:56,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103034052] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:02:56,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032429626] [2024-11-28 05:02:56,853 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 05:02:56,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:02:56,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:02:56,856 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:02:56,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-28 05:02:56,996 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 05:02:56,996 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:02:57,002 INFO L256 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-28 05:02:57,005 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:02:57,108 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:02:57,109 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2024-11-28 05:02:57,140 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-28 05:02:57,140 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:02:57,666 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2024-11-28 05:02:57,666 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 107 [2024-11-28 05:02:57,801 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-28 05:02:57,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032429626] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:02:57,801 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:02:57,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 21 [2024-11-28 05:02:57,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965289849] [2024-11-28 05:02:57,802 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:02:57,802 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-28 05:02:57,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:02:57,803 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-28 05:02:57,803 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2024-11-28 05:02:57,804 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 05:02:57,804 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 59 transitions, 476 flow. Second operand has 21 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 21 states have internal predecessors, (104), 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) [2024-11-28 05:02:57,804 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:02:57,804 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 05:02:57,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:02:58,555 INFO L124 PetriNetUnfolderBase]: 175/326 cut-off events. [2024-11-28 05:02:58,556 INFO L125 PetriNetUnfolderBase]: For 1075/1075 co-relation queries the response was YES. [2024-11-28 05:02:58,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1476 conditions, 326 events. 175/326 cut-off events. For 1075/1075 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1141 event pairs, 26 based on Foata normal form. 1/327 useless extension candidates. Maximal degree in co-relation 1393. Up to 242 conditions per place. [2024-11-28 05:02:58,559 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 57 selfloop transitions, 21 changer transitions 1/80 dead transitions. [2024-11-28 05:02:58,559 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 80 transitions, 744 flow [2024-11-28 05:02:58,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-28 05:02:58,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-28 05:02:58,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 81 transitions. [2024-11-28 05:02:58,561 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3347107438016529 [2024-11-28 05:02:58,561 INFO L175 Difference]: Start difference. First operand has 78 places, 59 transitions, 476 flow. Second operand 11 states and 81 transitions. [2024-11-28 05:02:58,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 80 transitions, 744 flow [2024-11-28 05:02:58,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 80 transitions, 697 flow, removed 5 selfloop flow, removed 9 redundant places. [2024-11-28 05:02:58,570 INFO L231 Difference]: Finished difference. Result has 81 places, 64 transitions, 536 flow [2024-11-28 05:02:58,570 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=429, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=536, PETRI_PLACES=81, PETRI_TRANSITIONS=64} [2024-11-28 05:02:58,571 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 59 predicate places. [2024-11-28 05:02:58,573 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 64 transitions, 536 flow [2024-11-28 05:02:58,573 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 21 states have internal predecessors, (104), 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) [2024-11-28 05:02:58,574 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:02:58,574 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:02:58,584 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-28 05:02:58,774 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:02:58,774 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:02:58,775 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:02:58,775 INFO L85 PathProgramCache]: Analyzing trace with hash 894722600, now seen corresponding path program 5 times [2024-11-28 05:02:58,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:02:58,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812579438] [2024-11-28 05:02:58,775 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 05:02:58,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:02:58,842 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-11-28 05:02:58,843 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:02:59,881 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-28 05:02:59,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:02:59,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812579438] [2024-11-28 05:02:59,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812579438] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:02:59,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914082544] [2024-11-28 05:02:59,883 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 05:02:59,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:02:59,883 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:02:59,885 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:02:59,890 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-28 05:03:00,182 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-11-28 05:03:00,182 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:03:00,186 INFO L256 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-28 05:03:00,188 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:03:00,341 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:03:00,341 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2024-11-28 05:03:00,426 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-28 05:03:00,426 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:03:00,942 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2024-11-28 05:03:00,942 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 107 [2024-11-28 05:03:01,077 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:03:01,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914082544] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:03:01,077 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:03:01,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 8] total 23 [2024-11-28 05:03:01,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070541414] [2024-11-28 05:03:01,077 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:03:01,078 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-28 05:03:01,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:03:01,078 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-28 05:03:01,078 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2024-11-28 05:03:01,079 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 05:03:01,079 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 64 transitions, 536 flow. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 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) [2024-11-28 05:03:01,079 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:03:01,079 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 05:03:01,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:03:01,900 INFO L124 PetriNetUnfolderBase]: 179/337 cut-off events. [2024-11-28 05:03:01,900 INFO L125 PetriNetUnfolderBase]: For 1286/1286 co-relation queries the response was YES. [2024-11-28 05:03:01,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1600 conditions, 337 events. 179/337 cut-off events. For 1286/1286 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1199 event pairs, 28 based on Foata normal form. 1/338 useless extension candidates. Maximal degree in co-relation 1515. Up to 241 conditions per place. [2024-11-28 05:03:01,904 INFO L140 encePairwiseOnDemand]: 9/22 looper letters, 55 selfloop transitions, 26 changer transitions 3/85 dead transitions. [2024-11-28 05:03:01,904 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 85 transitions, 810 flow [2024-11-28 05:03:01,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-28 05:03:01,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-28 05:03:01,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 95 transitions. [2024-11-28 05:03:01,906 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.30844155844155846 [2024-11-28 05:03:01,906 INFO L175 Difference]: Start difference. First operand has 81 places, 64 transitions, 536 flow. Second operand 14 states and 95 transitions. [2024-11-28 05:03:01,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 85 transitions, 810 flow [2024-11-28 05:03:01,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 85 transitions, 762 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-11-28 05:03:01,915 INFO L231 Difference]: Finished difference. Result has 89 places, 67 transitions, 591 flow [2024-11-28 05:03:01,916 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=496, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=591, PETRI_PLACES=89, PETRI_TRANSITIONS=67} [2024-11-28 05:03:01,917 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 67 predicate places. [2024-11-28 05:03:01,918 INFO L471 AbstractCegarLoop]: Abstraction has has 89 places, 67 transitions, 591 flow [2024-11-28 05:03:01,918 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 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) [2024-11-28 05:03:01,918 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:03:01,918 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:03:01,930 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-28 05:03:02,119 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:03:02,119 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:03:02,120 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:03:02,120 INFO L85 PathProgramCache]: Analyzing trace with hash 1232160978, now seen corresponding path program 6 times [2024-11-28 05:03:02,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:03:02,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661596611] [2024-11-28 05:03:02,120 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 05:03:02,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:03:02,172 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-28 05:03:02,172 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:03:02,793 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-28 05:03:02,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:03:02,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661596611] [2024-11-28 05:03:02,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661596611] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:03:02,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959163313] [2024-11-28 05:03:02,793 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 05:03:02,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:03:02,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:03:02,797 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:03:02,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-28 05:03:02,937 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-28 05:03:02,938 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:03:02,943 INFO L256 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-28 05:03:02,945 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:03:03,099 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:03:03,100 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2024-11-28 05:03:03,181 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-28 05:03:03,182 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:03:03,703 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2024-11-28 05:03:03,704 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 107 [2024-11-28 05:03:03,886 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:03:03,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959163313] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:03:03,887 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:03:03,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 23 [2024-11-28 05:03:03,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771068268] [2024-11-28 05:03:03,887 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:03:03,888 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-28 05:03:03,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:03:03,889 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-28 05:03:03,889 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2024-11-28 05:03:03,889 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 05:03:03,890 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 67 transitions, 591 flow. Second operand has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 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) [2024-11-28 05:03:03,890 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:03:03,890 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 05:03:03,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:03:04,605 INFO L124 PetriNetUnfolderBase]: 199/372 cut-off events. [2024-11-28 05:03:04,606 INFO L125 PetriNetUnfolderBase]: For 1812/1812 co-relation queries the response was YES. [2024-11-28 05:03:04,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1877 conditions, 372 events. 199/372 cut-off events. For 1812/1812 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1367 event pairs, 56 based on Foata normal form. 1/373 useless extension candidates. Maximal degree in co-relation 1788. Up to 267 conditions per place. [2024-11-28 05:03:04,610 INFO L140 encePairwiseOnDemand]: 11/22 looper letters, 62 selfloop transitions, 26 changer transitions 2/91 dead transitions. [2024-11-28 05:03:04,610 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 91 transitions, 940 flow [2024-11-28 05:03:04,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-28 05:03:04,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-28 05:03:04,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 88 transitions. [2024-11-28 05:03:04,612 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3076923076923077 [2024-11-28 05:03:04,612 INFO L175 Difference]: Start difference. First operand has 89 places, 67 transitions, 591 flow. Second operand 13 states and 88 transitions. [2024-11-28 05:03:04,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 91 transitions, 940 flow [2024-11-28 05:03:04,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 91 transitions, 859 flow, removed 15 selfloop flow, removed 11 redundant places. [2024-11-28 05:03:04,621 INFO L231 Difference]: Finished difference. Result has 92 places, 75 transitions, 667 flow [2024-11-28 05:03:04,621 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=514, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=667, PETRI_PLACES=92, PETRI_TRANSITIONS=75} [2024-11-28 05:03:04,622 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 70 predicate places. [2024-11-28 05:03:04,622 INFO L471 AbstractCegarLoop]: Abstraction has has 92 places, 75 transitions, 667 flow [2024-11-28 05:03:04,622 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 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) [2024-11-28 05:03:04,622 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:03:04,622 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:03:04,633 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-28 05:03:04,823 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:03:04,823 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:03:04,823 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:03:04,823 INFO L85 PathProgramCache]: Analyzing trace with hash -1333758984, now seen corresponding path program 7 times [2024-11-28 05:03:04,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:03:04,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263852707] [2024-11-28 05:03:04,824 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 05:03:04,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:03:04,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:03:06,516 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-28 05:03:06,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:03:06,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263852707] [2024-11-28 05:03:06,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263852707] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:03:06,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770447800] [2024-11-28 05:03:06,517 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 05:03:06,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:03:06,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:03:06,519 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:03:06,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-28 05:03:06,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:03:06,664 INFO L256 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-28 05:03:06,665 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:03:06,766 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:03:06,766 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2024-11-28 05:03:06,863 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:03:06,863 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:03:07,382 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2024-11-28 05:03:07,383 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 107 [2024-11-28 05:03:07,507 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:03:07,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770447800] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:03:07,507 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:03:07,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 8, 8] total 28 [2024-11-28 05:03:07,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362820512] [2024-11-28 05:03:07,508 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:03:07,508 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-28 05:03:07,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:03:07,509 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-28 05:03:07,509 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=658, Unknown=0, NotChecked=0, Total=756 [2024-11-28 05:03:07,509 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 05:03:07,510 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 75 transitions, 667 flow. Second operand has 28 states, 28 states have (on average 4.75) internal successors, (133), 28 states have internal predecessors, (133), 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) [2024-11-28 05:03:07,510 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:03:07,510 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 05:03:07,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:03:09,470 INFO L124 PetriNetUnfolderBase]: 221/421 cut-off events. [2024-11-28 05:03:09,470 INFO L125 PetriNetUnfolderBase]: For 2272/2272 co-relation queries the response was YES. [2024-11-28 05:03:09,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2178 conditions, 421 events. 221/421 cut-off events. For 2272/2272 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 1607 event pairs, 63 based on Foata normal form. 2/423 useless extension candidates. Maximal degree in co-relation 2078. Up to 300 conditions per place. [2024-11-28 05:03:09,475 INFO L140 encePairwiseOnDemand]: 9/22 looper letters, 60 selfloop transitions, 48 changer transitions 3/112 dead transitions. [2024-11-28 05:03:09,475 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 112 transitions, 1165 flow [2024-11-28 05:03:09,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-28 05:03:09,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-11-28 05:03:09,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 153 transitions. [2024-11-28 05:03:09,479 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.2674825174825175 [2024-11-28 05:03:09,479 INFO L175 Difference]: Start difference. First operand has 92 places, 75 transitions, 667 flow. Second operand 26 states and 153 transitions. [2024-11-28 05:03:09,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 112 transitions, 1165 flow [2024-11-28 05:03:09,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 112 transitions, 1120 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-11-28 05:03:09,492 INFO L231 Difference]: Finished difference. Result has 115 places, 93 transitions, 939 flow [2024-11-28 05:03:09,492 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=628, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=939, PETRI_PLACES=115, PETRI_TRANSITIONS=93} [2024-11-28 05:03:09,493 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 93 predicate places. [2024-11-28 05:03:09,494 INFO L471 AbstractCegarLoop]: Abstraction has has 115 places, 93 transitions, 939 flow [2024-11-28 05:03:09,495 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 4.75) internal successors, (133), 28 states have internal predecessors, (133), 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) [2024-11-28 05:03:09,495 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:03:09,496 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:03:09,507 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-28 05:03:09,699 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-28 05:03:09,699 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:03:09,700 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:03:09,700 INFO L85 PathProgramCache]: Analyzing trace with hash -860348612, now seen corresponding path program 8 times [2024-11-28 05:03:09,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:03:09,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149258884] [2024-11-28 05:03:09,700 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:03:09,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:03:09,758 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:03:09,758 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:03:10,762 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-28 05:03:10,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:03:10,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149258884] [2024-11-28 05:03:10,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149258884] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:03:10,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249295601] [2024-11-28 05:03:10,763 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:03:10,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:03:10,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:03:10,766 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:03:10,770 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-28 05:03:10,950 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:03:10,950 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:03:10,956 INFO L256 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-28 05:03:10,958 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:03:11,083 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:03:11,084 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2024-11-28 05:03:11,139 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:03:11,140 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:03:11,740 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-11-28 05:03:11,740 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 79 [2024-11-28 05:03:11,819 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:03:11,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249295601] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:03:11,820 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:03:11,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 22 [2024-11-28 05:03:11,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107332738] [2024-11-28 05:03:11,820 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:03:11,821 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-28 05:03:11,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:03:11,822 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-28 05:03:11,822 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2024-11-28 05:03:11,822 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 05:03:11,823 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 93 transitions, 939 flow. Second operand has 22 states, 22 states have (on average 5.0) internal successors, (110), 22 states have internal predecessors, (110), 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) [2024-11-28 05:03:11,823 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:03:11,823 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 05:03:11,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:03:12,913 INFO L124 PetriNetUnfolderBase]: 264/504 cut-off events. [2024-11-28 05:03:12,913 INFO L125 PetriNetUnfolderBase]: For 3347/3347 co-relation queries the response was YES. [2024-11-28 05:03:12,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2818 conditions, 504 events. 264/504 cut-off events. For 3347/3347 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2067 event pairs, 43 based on Foata normal form. 2/506 useless extension candidates. Maximal degree in co-relation 2739. Up to 202 conditions per place. [2024-11-28 05:03:12,920 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 80 selfloop transitions, 41 changer transitions 4/126 dead transitions. [2024-11-28 05:03:12,920 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 126 transitions, 1460 flow [2024-11-28 05:03:12,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-28 05:03:12,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-28 05:03:12,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 98 transitions. [2024-11-28 05:03:12,921 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.34265734265734266 [2024-11-28 05:03:12,921 INFO L175 Difference]: Start difference. First operand has 115 places, 93 transitions, 939 flow. Second operand 13 states and 98 transitions. [2024-11-28 05:03:12,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 126 transitions, 1460 flow [2024-11-28 05:03:12,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 126 transitions, 1277 flow, removed 46 selfloop flow, removed 17 redundant places. [2024-11-28 05:03:12,938 INFO L231 Difference]: Finished difference. Result has 114 places, 102 transitions, 1020 flow [2024-11-28 05:03:12,938 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=756, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1020, PETRI_PLACES=114, PETRI_TRANSITIONS=102} [2024-11-28 05:03:12,939 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 92 predicate places. [2024-11-28 05:03:12,939 INFO L471 AbstractCegarLoop]: Abstraction has has 114 places, 102 transitions, 1020 flow [2024-11-28 05:03:12,939 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.0) internal successors, (110), 22 states have internal predecessors, (110), 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) [2024-11-28 05:03:12,939 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:03:12,940 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:03:12,950 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-28 05:03:13,143 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-28 05:03:13,144 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:03:13,144 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:03:13,145 INFO L85 PathProgramCache]: Analyzing trace with hash 2132693073, now seen corresponding path program 9 times [2024-11-28 05:03:13,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:03:13,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790749540] [2024-11-28 05:03:13,145 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 05:03:13,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:03:13,179 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 05:03:13,180 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:03:13,791 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-28 05:03:13,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:03:13,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790749540] [2024-11-28 05:03:13,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790749540] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:03:13,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433460607] [2024-11-28 05:03:13,792 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 05:03:13,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:03:13,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:03:13,795 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:03:13,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-28 05:03:13,969 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 05:03:13,969 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:03:13,971 INFO L256 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-28 05:03:13,973 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:03:14,218 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-11-28 05:03:14,218 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2024-11-28 05:03:14,243 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:03:14,243 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:03:14,527 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-11-28 05:03:14,527 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2024-11-28 05:03:14,585 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:03:14,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433460607] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:03:14,586 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:03:14,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 20 [2024-11-28 05:03:14,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625843311] [2024-11-28 05:03:14,586 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:03:14,587 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-28 05:03:14,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:03:14,587 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-28 05:03:14,587 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2024-11-28 05:03:14,587 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 05:03:14,588 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 102 transitions, 1020 flow. Second operand has 20 states, 20 states have (on average 5.3) internal successors, (106), 20 states have internal predecessors, (106), 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) [2024-11-28 05:03:14,588 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:03:14,589 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 05:03:14,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:03:15,462 INFO L124 PetriNetUnfolderBase]: 278/528 cut-off events. [2024-11-28 05:03:15,462 INFO L125 PetriNetUnfolderBase]: For 3948/3948 co-relation queries the response was YES. [2024-11-28 05:03:15,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3116 conditions, 528 events. 278/528 cut-off events. For 3948/3948 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 2199 event pairs, 44 based on Foata normal form. 5/533 useless extension candidates. Maximal degree in co-relation 3051. Up to 258 conditions per place. [2024-11-28 05:03:15,470 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 93 selfloop transitions, 37 changer transitions 0/131 dead transitions. [2024-11-28 05:03:15,470 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 131 transitions, 1544 flow [2024-11-28 05:03:15,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-28 05:03:15,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-28 05:03:15,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 84 transitions. [2024-11-28 05:03:15,471 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.38181818181818183 [2024-11-28 05:03:15,471 INFO L175 Difference]: Start difference. First operand has 114 places, 102 transitions, 1020 flow. Second operand 10 states and 84 transitions. [2024-11-28 05:03:15,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 131 transitions, 1544 flow [2024-11-28 05:03:15,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 131 transitions, 1440 flow, removed 37 selfloop flow, removed 6 redundant places. [2024-11-28 05:03:15,491 INFO L231 Difference]: Finished difference. Result has 119 places, 104 transitions, 1057 flow [2024-11-28 05:03:15,491 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=935, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1057, PETRI_PLACES=119, PETRI_TRANSITIONS=104} [2024-11-28 05:03:15,492 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 97 predicate places. [2024-11-28 05:03:15,492 INFO L471 AbstractCegarLoop]: Abstraction has has 119 places, 104 transitions, 1057 flow [2024-11-28 05:03:15,493 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.3) internal successors, (106), 20 states have internal predecessors, (106), 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) [2024-11-28 05:03:15,493 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:03:15,493 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:03:15,503 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-28 05:03:15,697 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-28 05:03:15,697 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:03:15,698 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:03:15,698 INFO L85 PathProgramCache]: Analyzing trace with hash 721816152, now seen corresponding path program 10 times [2024-11-28 05:03:15,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:03:15,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402311502] [2024-11-28 05:03:15,698 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 05:03:15,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:03:15,751 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 05:03:15,751 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:03:16,502 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-28 05:03:16,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:03:16,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402311502] [2024-11-28 05:03:16,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402311502] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:03:16,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192830660] [2024-11-28 05:03:16,503 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 05:03:16,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:03:16,503 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:03:16,506 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:03:16,509 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-28 05:03:16,680 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 05:03:16,681 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:03:16,683 INFO L256 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-28 05:03:16,684 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:03:16,817 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:03:16,817 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:03:17,016 INFO L349 Elim1Store]: treesize reduction 24, result has 65.2 percent of original size [2024-11-28 05:03:17,016 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 67 [2024-11-28 05:03:17,051 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:03:17,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192830660] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:03:17,051 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:03:17,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 18 [2024-11-28 05:03:17,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171865947] [2024-11-28 05:03:17,052 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:03:17,052 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-28 05:03:17,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:03:17,052 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-28 05:03:17,052 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2024-11-28 05:03:17,053 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 05:03:17,053 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 104 transitions, 1057 flow. Second operand has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 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) [2024-11-28 05:03:17,053 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:03:17,053 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 05:03:17,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:03:17,707 INFO L124 PetriNetUnfolderBase]: 281/541 cut-off events. [2024-11-28 05:03:17,707 INFO L125 PetriNetUnfolderBase]: For 4229/4229 co-relation queries the response was YES. [2024-11-28 05:03:17,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3204 conditions, 541 events. 281/541 cut-off events. For 4229/4229 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 2363 event pairs, 46 based on Foata normal form. 3/542 useless extension candidates. Maximal degree in co-relation 3137. Up to 187 conditions per place. [2024-11-28 05:03:17,714 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 89 selfloop transitions, 38 changer transitions 13/141 dead transitions. [2024-11-28 05:03:17,715 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 141 transitions, 1641 flow [2024-11-28 05:03:17,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-28 05:03:17,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-28 05:03:17,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 77 transitions. [2024-11-28 05:03:17,716 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-11-28 05:03:17,716 INFO L175 Difference]: Start difference. First operand has 119 places, 104 transitions, 1057 flow. Second operand 9 states and 77 transitions. [2024-11-28 05:03:17,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 141 transitions, 1641 flow [2024-11-28 05:03:17,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 141 transitions, 1525 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-11-28 05:03:17,738 INFO L231 Difference]: Finished difference. Result has 123 places, 105 transitions, 1072 flow [2024-11-28 05:03:17,739 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=943, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1072, PETRI_PLACES=123, PETRI_TRANSITIONS=105} [2024-11-28 05:03:17,739 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 101 predicate places. [2024-11-28 05:03:17,739 INFO L471 AbstractCegarLoop]: Abstraction has has 123 places, 105 transitions, 1072 flow [2024-11-28 05:03:17,740 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 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) [2024-11-28 05:03:17,740 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:03:17,740 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:03:17,752 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-28 05:03:17,944 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:03:17,945 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:03:17,945 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:03:17,946 INFO L85 PathProgramCache]: Analyzing trace with hash 512328182, now seen corresponding path program 11 times [2024-11-28 05:03:17,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:03:17,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708893080] [2024-11-28 05:03:17,946 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 05:03:17,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:03:18,037 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-11-28 05:03:18,037 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:03:19,896 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 7 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:03:19,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:03:19,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708893080] [2024-11-28 05:03:19,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708893080] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:03:19,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652985004] [2024-11-28 05:03:19,896 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 05:03:19,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:03:19,896 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:03:19,898 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:03:19,901 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-28 05:03:20,148 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-11-28 05:03:20,148 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:03:20,151 INFO L256 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-28 05:03:20,152 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:03:20,411 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:03:20,411 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 41 [2024-11-28 05:03:20,501 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-28 05:03:20,501 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:03:20,768 INFO L349 Elim1Store]: treesize reduction 24, result has 65.2 percent of original size [2024-11-28 05:03:20,768 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 67 [2024-11-28 05:03:20,829 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:03:20,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652985004] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:03:20,829 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:03:20,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 9, 7] total 31 [2024-11-28 05:03:20,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389501675] [2024-11-28 05:03:20,829 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:03:20,830 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-28 05:03:20,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:03:20,830 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-28 05:03:20,831 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=812, Unknown=0, NotChecked=0, Total=930 [2024-11-28 05:03:20,831 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 05:03:20,831 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 105 transitions, 1072 flow. Second operand has 31 states, 31 states have (on average 4.806451612903226) internal successors, (149), 31 states have internal predecessors, (149), 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) [2024-11-28 05:03:20,832 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:03:20,832 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 05:03:20,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:03:21,617 INFO L124 PetriNetUnfolderBase]: 285/548 cut-off events. [2024-11-28 05:03:21,618 INFO L125 PetriNetUnfolderBase]: For 4463/4463 co-relation queries the response was YES. [2024-11-28 05:03:21,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3355 conditions, 548 events. 285/548 cut-off events. For 4463/4463 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 2357 event pairs, 61 based on Foata normal form. 4/550 useless extension candidates. Maximal degree in co-relation 3286. Up to 222 conditions per place. [2024-11-28 05:03:21,624 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 82 selfloop transitions, 48 changer transitions 1/132 dead transitions. [2024-11-28 05:03:21,625 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 132 transitions, 1559 flow [2024-11-28 05:03:21,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-28 05:03:21,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-28 05:03:21,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 98 transitions. [2024-11-28 05:03:21,626 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3712121212121212 [2024-11-28 05:03:21,626 INFO L175 Difference]: Start difference. First operand has 123 places, 105 transitions, 1072 flow. Second operand 12 states and 98 transitions. [2024-11-28 05:03:21,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 132 transitions, 1559 flow [2024-11-28 05:03:21,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 132 transitions, 1459 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-11-28 05:03:21,647 INFO L231 Difference]: Finished difference. Result has 127 places, 106 transitions, 1096 flow [2024-11-28 05:03:21,647 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=981, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1096, PETRI_PLACES=127, PETRI_TRANSITIONS=106} [2024-11-28 05:03:21,648 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 105 predicate places. [2024-11-28 05:03:21,648 INFO L471 AbstractCegarLoop]: Abstraction has has 127 places, 106 transitions, 1096 flow [2024-11-28 05:03:21,649 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 4.806451612903226) internal successors, (149), 31 states have internal predecessors, (149), 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) [2024-11-28 05:03:21,649 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:03:21,649 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:03:21,660 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-28 05:03:21,853 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:03:21,853 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:03:21,854 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:03:21,854 INFO L85 PathProgramCache]: Analyzing trace with hash 1610569723, now seen corresponding path program 12 times [2024-11-28 05:03:21,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:03:21,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386088363] [2024-11-28 05:03:21,854 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 05:03:21,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:03:21,888 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-28 05:03:21,888 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:03:22,520 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-28 05:03:22,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:03:22,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386088363] [2024-11-28 05:03:22,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386088363] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:03:22,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706461527] [2024-11-28 05:03:22,521 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 05:03:22,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:03:22,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:03:22,524 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:03:22,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-28 05:03:22,680 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-28 05:03:22,680 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:03:22,684 INFO L256 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-28 05:03:22,685 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:03:22,865 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:03:22,865 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 34 [2024-11-28 05:03:22,953 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:03:22,953 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:03:23,201 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-11-28 05:03:23,201 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2024-11-28 05:03:23,257 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:03:23,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706461527] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:03:23,258 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:03:23,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 20 [2024-11-28 05:03:23,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781322165] [2024-11-28 05:03:23,258 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:03:23,259 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-28 05:03:23,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:03:23,259 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-28 05:03:23,260 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2024-11-28 05:03:23,260 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 05:03:23,260 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 106 transitions, 1096 flow. Second operand has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 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) [2024-11-28 05:03:23,260 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:03:23,260 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 05:03:23,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:03:24,741 INFO L124 PetriNetUnfolderBase]: 333/653 cut-off events. [2024-11-28 05:03:24,741 INFO L125 PetriNetUnfolderBase]: For 5503/5503 co-relation queries the response was YES. [2024-11-28 05:03:24,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3916 conditions, 653 events. 333/653 cut-off events. For 5503/5503 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 3014 event pairs, 34 based on Foata normal form. 10/661 useless extension candidates. Maximal degree in co-relation 3848. Up to 238 conditions per place. [2024-11-28 05:03:24,749 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 129 selfloop transitions, 55 changer transitions 3/188 dead transitions. [2024-11-28 05:03:24,749 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 188 transitions, 2115 flow [2024-11-28 05:03:24,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-28 05:03:24,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-11-28 05:03:24,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 185 transitions. [2024-11-28 05:03:24,751 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3822314049586777 [2024-11-28 05:03:24,751 INFO L175 Difference]: Start difference. First operand has 127 places, 106 transitions, 1096 flow. Second operand 22 states and 185 transitions. [2024-11-28 05:03:24,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 188 transitions, 2115 flow [2024-11-28 05:03:24,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 188 transitions, 2013 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-11-28 05:03:24,775 INFO L231 Difference]: Finished difference. Result has 143 places, 116 transitions, 1286 flow [2024-11-28 05:03:24,775 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=994, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1286, PETRI_PLACES=143, PETRI_TRANSITIONS=116} [2024-11-28 05:03:24,775 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 121 predicate places. [2024-11-28 05:03:24,776 INFO L471 AbstractCegarLoop]: Abstraction has has 143 places, 116 transitions, 1286 flow [2024-11-28 05:03:24,776 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 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) [2024-11-28 05:03:24,776 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:03:24,776 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:03:24,786 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-28 05:03:24,980 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-11-28 05:03:24,980 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:03:24,981 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:03:24,981 INFO L85 PathProgramCache]: Analyzing trace with hash -2051299047, now seen corresponding path program 13 times [2024-11-28 05:03:24,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:03:24,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927452316] [2024-11-28 05:03:24,982 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 05:03:24,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:03:25,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:03:25,692 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-28 05:03:25,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:03:25,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927452316] [2024-11-28 05:03:25,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927452316] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:03:25,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834169470] [2024-11-28 05:03:25,693 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 05:03:25,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:03:25,693 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:03:25,695 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:03:25,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-28 05:03:25,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:03:25,861 INFO L256 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-28 05:03:25,863 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:03:25,998 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-11-28 05:03:25,998 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2024-11-28 05:03:26,001 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:03:26,002 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:03:26,196 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-11-28 05:03:26,196 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2024-11-28 05:03:26,213 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:03:26,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834169470] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:03:26,213 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:03:26,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 18 [2024-11-28 05:03:26,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760190985] [2024-11-28 05:03:26,213 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:03:26,214 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-28 05:03:26,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:03:26,214 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-28 05:03:26,214 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2024-11-28 05:03:26,214 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 05:03:26,214 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 116 transitions, 1286 flow. Second operand has 18 states, 18 states have (on average 5.333333333333333) internal successors, (96), 18 states have internal predecessors, (96), 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) [2024-11-28 05:03:26,215 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:03:26,215 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 05:03:26,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:03:26,726 INFO L124 PetriNetUnfolderBase]: 345/664 cut-off events. [2024-11-28 05:03:26,726 INFO L125 PetriNetUnfolderBase]: For 6852/6852 co-relation queries the response was YES. [2024-11-28 05:03:26,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4343 conditions, 664 events. 345/664 cut-off events. For 6852/6852 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 3057 event pairs, 40 based on Foata normal form. 5/667 useless extension candidates. Maximal degree in co-relation 4270. Up to 266 conditions per place. [2024-11-28 05:03:26,734 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 103 selfloop transitions, 46 changer transitions 0/150 dead transitions. [2024-11-28 05:03:26,734 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 150 transitions, 1861 flow [2024-11-28 05:03:26,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-28 05:03:26,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-28 05:03:26,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 100 transitions. [2024-11-28 05:03:26,736 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3787878787878788 [2024-11-28 05:03:26,736 INFO L175 Difference]: Start difference. First operand has 143 places, 116 transitions, 1286 flow. Second operand 12 states and 100 transitions. [2024-11-28 05:03:26,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 150 transitions, 1861 flow [2024-11-28 05:03:26,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 150 transitions, 1679 flow, removed 41 selfloop flow, removed 17 redundant places. [2024-11-28 05:03:26,760 INFO L231 Difference]: Finished difference. Result has 137 places, 118 transitions, 1242 flow [2024-11-28 05:03:26,761 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1089, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1242, PETRI_PLACES=137, PETRI_TRANSITIONS=118} [2024-11-28 05:03:26,761 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 115 predicate places. [2024-11-28 05:03:26,761 INFO L471 AbstractCegarLoop]: Abstraction has has 137 places, 118 transitions, 1242 flow [2024-11-28 05:03:26,761 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.333333333333333) internal successors, (96), 18 states have internal predecessors, (96), 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) [2024-11-28 05:03:26,761 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:03:26,761 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:03:26,772 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-28 05:03:26,962 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-11-28 05:03:26,962 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:03:26,963 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:03:26,963 INFO L85 PathProgramCache]: Analyzing trace with hash -1117835338, now seen corresponding path program 14 times [2024-11-28 05:03:26,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:03:26,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62242769] [2024-11-28 05:03:26,963 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:03:26,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:03:27,006 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:03:27,006 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:03:27,859 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-28 05:03:27,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:03:27,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62242769] [2024-11-28 05:03:27,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62242769] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:03:27,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389279651] [2024-11-28 05:03:27,860 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:03:27,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:03:27,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:03:27,861 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:03:27,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-28 05:03:28,023 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:03:28,023 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:03:28,024 INFO L256 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-28 05:03:28,026 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:03:28,167 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:03:28,167 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 45 [2024-11-28 05:03:28,222 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:03:28,222 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:03:28,445 INFO L349 Elim1Store]: treesize reduction 24, result has 65.2 percent of original size [2024-11-28 05:03:28,445 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 67 [2024-11-28 05:03:28,537 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:03:28,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389279651] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:03:28,538 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:03:28,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 20 [2024-11-28 05:03:28,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977096866] [2024-11-28 05:03:28,538 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:03:28,539 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-28 05:03:28,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:03:28,539 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-28 05:03:28,539 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2024-11-28 05:03:28,540 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 05:03:28,540 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 118 transitions, 1242 flow. Second operand has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 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) [2024-11-28 05:03:28,540 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:03:28,540 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 05:03:28,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:03:30,239 INFO L124 PetriNetUnfolderBase]: 346/672 cut-off events. [2024-11-28 05:03:30,239 INFO L125 PetriNetUnfolderBase]: For 5900/5900 co-relation queries the response was YES. [2024-11-28 05:03:30,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4187 conditions, 672 events. 346/672 cut-off events. For 5900/5900 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 3166 event pairs, 64 based on Foata normal form. 3/673 useless extension candidates. Maximal degree in co-relation 4115. Up to 305 conditions per place. [2024-11-28 05:03:30,244 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 113 selfloop transitions, 47 changer transitions 11/172 dead transitions. [2024-11-28 05:03:30,244 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 172 transitions, 2042 flow [2024-11-28 05:03:30,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-28 05:03:30,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-11-28 05:03:30,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 128 transitions. [2024-11-28 05:03:30,246 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.36363636363636365 [2024-11-28 05:03:30,246 INFO L175 Difference]: Start difference. First operand has 137 places, 118 transitions, 1242 flow. Second operand 16 states and 128 transitions. [2024-11-28 05:03:30,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 172 transitions, 2042 flow [2024-11-28 05:03:30,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 172 transitions, 1950 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-11-28 05:03:30,267 INFO L231 Difference]: Finished difference. Result has 143 places, 121 transitions, 1282 flow [2024-11-28 05:03:30,267 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1152, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1282, PETRI_PLACES=143, PETRI_TRANSITIONS=121} [2024-11-28 05:03:30,268 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 121 predicate places. [2024-11-28 05:03:30,268 INFO L471 AbstractCegarLoop]: Abstraction has has 143 places, 121 transitions, 1282 flow [2024-11-28 05:03:30,268 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 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) [2024-11-28 05:03:30,268 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:03:30,268 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:03:30,279 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-28 05:03:30,469 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-11-28 05:03:30,469 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:03:30,469 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:03:30,470 INFO L85 PathProgramCache]: Analyzing trace with hash -41307181, now seen corresponding path program 15 times [2024-11-28 05:03:30,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:03:30,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546327065] [2024-11-28 05:03:30,470 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 05:03:30,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:03:30,493 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 05:03:30,493 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:03:31,116 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-28 05:03:31,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:03:31,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546327065] [2024-11-28 05:03:31,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546327065] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:03:31,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832248400] [2024-11-28 05:03:31,117 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 05:03:31,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:03:31,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:03:31,118 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:03:31,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-28 05:03:31,276 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 05:03:31,276 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:03:31,277 INFO L256 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-28 05:03:31,279 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:03:31,436 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:03:31,437 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 34 [2024-11-28 05:03:31,509 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:03:31,509 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:03:31,715 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-11-28 05:03:31,715 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2024-11-28 05:03:31,758 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:03:31,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832248400] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:03:31,758 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:03:31,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 20 [2024-11-28 05:03:31,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410222172] [2024-11-28 05:03:31,758 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:03:31,759 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-28 05:03:31,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:03:31,759 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-28 05:03:31,759 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2024-11-28 05:03:31,760 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 05:03:31,760 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 121 transitions, 1282 flow. Second operand has 20 states, 20 states have (on average 5.0) internal successors, (100), 20 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:03:31,760 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:03:31,760 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 05:03:31,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:03:32,844 INFO L124 PetriNetUnfolderBase]: 335/638 cut-off events. [2024-11-28 05:03:32,844 INFO L125 PetriNetUnfolderBase]: For 5607/5607 co-relation queries the response was YES. [2024-11-28 05:03:32,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4037 conditions, 638 events. 335/638 cut-off events. For 5607/5607 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 2904 event pairs, 28 based on Foata normal form. 2/638 useless extension candidates. Maximal degree in co-relation 3965. Up to 238 conditions per place. [2024-11-28 05:03:32,848 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 100 selfloop transitions, 54 changer transitions 4/159 dead transitions. [2024-11-28 05:03:32,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 159 transitions, 1858 flow [2024-11-28 05:03:32,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-28 05:03:32,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-11-28 05:03:32,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 128 transitions. [2024-11-28 05:03:32,850 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.36363636363636365 [2024-11-28 05:03:32,850 INFO L175 Difference]: Start difference. First operand has 143 places, 121 transitions, 1282 flow. Second operand 16 states and 128 transitions. [2024-11-28 05:03:32,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 159 transitions, 1858 flow [2024-11-28 05:03:32,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 159 transitions, 1718 flow, removed 12 selfloop flow, removed 13 redundant places. [2024-11-28 05:03:32,869 INFO L231 Difference]: Finished difference. Result has 142 places, 118 transitions, 1238 flow [2024-11-28 05:03:32,869 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1136, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1238, PETRI_PLACES=142, PETRI_TRANSITIONS=118} [2024-11-28 05:03:32,870 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 120 predicate places. [2024-11-28 05:03:32,870 INFO L471 AbstractCegarLoop]: Abstraction has has 142 places, 118 transitions, 1238 flow [2024-11-28 05:03:32,870 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.0) internal successors, (100), 20 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:03:32,870 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:03:32,870 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:03:32,877 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-11-28 05:03:33,070 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-11-28 05:03:33,071 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:03:33,071 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:03:33,071 INFO L85 PathProgramCache]: Analyzing trace with hash 1300284870, now seen corresponding path program 16 times [2024-11-28 05:03:33,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:03:33,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513226083] [2024-11-28 05:03:33,072 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 05:03:33,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:03:33,099 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 05:03:33,100 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:03:33,958 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-28 05:03:33,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:03:33,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513226083] [2024-11-28 05:03:33,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513226083] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:03:33,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834256039] [2024-11-28 05:03:33,959 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 05:03:33,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:03:33,959 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:03:33,961 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:03:33,984 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-28 05:03:34,155 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 05:03:34,156 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:03:34,158 INFO L256 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-28 05:03:34,159 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:03:34,312 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:03:34,312 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:03:34,477 INFO L349 Elim1Store]: treesize reduction 24, result has 65.2 percent of original size [2024-11-28 05:03:34,478 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 67 [2024-11-28 05:03:34,507 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:03:34,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834256039] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:03:34,507 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:03:34,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 19 [2024-11-28 05:03:34,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276888066] [2024-11-28 05:03:34,507 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:03:34,507 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-28 05:03:34,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:03:34,508 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-28 05:03:34,508 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2024-11-28 05:03:34,508 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 05:03:34,508 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 118 transitions, 1238 flow. Second operand has 19 states, 19 states have (on average 5.052631578947368) internal successors, (96), 19 states have internal predecessors, (96), 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) [2024-11-28 05:03:34,508 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:03:34,509 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 05:03:34,509 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:03:35,191 INFO L124 PetriNetUnfolderBase]: 325/613 cut-off events. [2024-11-28 05:03:35,191 INFO L125 PetriNetUnfolderBase]: For 5160/5160 co-relation queries the response was YES. [2024-11-28 05:03:35,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3884 conditions, 613 events. 325/613 cut-off events. For 5160/5160 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 2715 event pairs, 75 based on Foata normal form. 3/614 useless extension candidates. Maximal degree in co-relation 3815. Up to 285 conditions per place. [2024-11-28 05:03:35,199 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 93 selfloop transitions, 35 changer transitions 6/135 dead transitions. [2024-11-28 05:03:35,199 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 135 transitions, 1622 flow [2024-11-28 05:03:35,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-28 05:03:35,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-28 05:03:35,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 73 transitions. [2024-11-28 05:03:35,204 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3686868686868687 [2024-11-28 05:03:35,204 INFO L175 Difference]: Start difference. First operand has 142 places, 118 transitions, 1238 flow. Second operand 9 states and 73 transitions. [2024-11-28 05:03:35,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 135 transitions, 1622 flow [2024-11-28 05:03:35,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 135 transitions, 1508 flow, removed 2 selfloop flow, removed 16 redundant places. [2024-11-28 05:03:35,222 INFO L231 Difference]: Finished difference. Result has 131 places, 115 transitions, 1168 flow [2024-11-28 05:03:35,223 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1116, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1168, PETRI_PLACES=131, PETRI_TRANSITIONS=115} [2024-11-28 05:03:35,223 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 109 predicate places. [2024-11-28 05:03:35,223 INFO L471 AbstractCegarLoop]: Abstraction has has 131 places, 115 transitions, 1168 flow [2024-11-28 05:03:35,224 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.052631578947368) internal successors, (96), 19 states have internal predecessors, (96), 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) [2024-11-28 05:03:35,224 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:03:35,224 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:03:35,234 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-28 05:03:35,428 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-11-28 05:03:35,428 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:03:35,429 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:03:35,429 INFO L85 PathProgramCache]: Analyzing trace with hash -1052450407, now seen corresponding path program 17 times [2024-11-28 05:03:35,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:03:35,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867988196] [2024-11-28 05:03:35,429 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 05:03:35,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:03:35,498 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-11-28 05:03:35,498 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:03:36,634 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-28 05:03:36,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:03:36,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867988196] [2024-11-28 05:03:36,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867988196] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:03:36,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050547180] [2024-11-28 05:03:36,634 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 05:03:36,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:03:36,635 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:03:36,636 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:03:36,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-28 05:03:36,943 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-11-28 05:03:36,943 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:03:36,945 INFO L256 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-11-28 05:03:36,946 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:03:37,008 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 19 treesize of output 1 [2024-11-28 05:03:37,203 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:03:37,204 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 41 [2024-11-28 05:03:37,264 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-28 05:03:37,265 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:03:37,539 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:03:37,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050547180] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:03:37,539 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:03:37,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 7] total 29 [2024-11-28 05:03:37,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704559200] [2024-11-28 05:03:37,540 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:03:37,540 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-28 05:03:37,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:03:37,541 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-28 05:03:37,541 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=701, Unknown=0, NotChecked=0, Total=812 [2024-11-28 05:03:37,542 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 05:03:37,542 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 115 transitions, 1168 flow. Second operand has 29 states, 29 states have (on average 4.931034482758621) internal successors, (143), 29 states have internal predecessors, (143), 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) [2024-11-28 05:03:37,542 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:03:37,543 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 05:03:37,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:03:38,444 INFO L124 PetriNetUnfolderBase]: 331/626 cut-off events. [2024-11-28 05:03:38,445 INFO L125 PetriNetUnfolderBase]: For 5423/5423 co-relation queries the response was YES. [2024-11-28 05:03:38,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3897 conditions, 626 events. 331/626 cut-off events. For 5423/5423 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 2757 event pairs, 126 based on Foata normal form. 5/629 useless extension candidates. Maximal degree in co-relation 3829. Up to 494 conditions per place. [2024-11-28 05:03:38,451 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 93 selfloop transitions, 38 changer transitions 1/133 dead transitions. [2024-11-28 05:03:38,451 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 133 transitions, 1578 flow [2024-11-28 05:03:38,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-28 05:03:38,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-28 05:03:38,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 89 transitions. [2024-11-28 05:03:38,455 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3371212121212121 [2024-11-28 05:03:38,455 INFO L175 Difference]: Start difference. First operand has 131 places, 115 transitions, 1168 flow. Second operand 12 states and 89 transitions. [2024-11-28 05:03:38,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 133 transitions, 1578 flow [2024-11-28 05:03:38,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 133 transitions, 1508 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-28 05:03:38,466 INFO L231 Difference]: Finished difference. Result has 133 places, 116 transitions, 1204 flow [2024-11-28 05:03:38,466 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1098, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1204, PETRI_PLACES=133, PETRI_TRANSITIONS=116} [2024-11-28 05:03:38,466 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 111 predicate places. [2024-11-28 05:03:38,466 INFO L471 AbstractCegarLoop]: Abstraction has has 133 places, 116 transitions, 1204 flow [2024-11-28 05:03:38,467 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 4.931034482758621) internal successors, (143), 29 states have internal predecessors, (143), 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) [2024-11-28 05:03:38,467 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:03:38,467 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:03:38,473 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-11-28 05:03:38,667 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-11-28 05:03:38,667 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:03:38,668 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:03:38,668 INFO L85 PathProgramCache]: Analyzing trace with hash 738103894, now seen corresponding path program 18 times [2024-11-28 05:03:38,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:03:38,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959083695] [2024-11-28 05:03:38,668 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 05:03:38,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:03:38,713 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-11-28 05:03:38,713 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:03:39,511 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-28 05:03:39,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:03:39,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959083695] [2024-11-28 05:03:39,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959083695] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:03:39,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87166239] [2024-11-28 05:03:39,512 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 05:03:39,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:03:39,512 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:03:39,514 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:03:39,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-28 05:03:39,704 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-11-28 05:03:39,704 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:03:39,706 INFO L256 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-28 05:03:39,707 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:03:39,838 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:03:39,839 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 41 [2024-11-28 05:03:39,896 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-28 05:03:39,896 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:03:40,060 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-11-28 05:03:40,060 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2024-11-28 05:03:40,117 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:03:40,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87166239] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:03:40,118 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:03:40,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 20 [2024-11-28 05:03:40,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463090] [2024-11-28 05:03:40,118 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:03:40,118 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-28 05:03:40,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:03:40,119 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-28 05:03:40,119 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2024-11-28 05:03:40,119 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 05:03:40,119 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 116 transitions, 1204 flow. Second operand has 20 states, 20 states have (on average 5.0) internal successors, (100), 20 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:03:40,119 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:03:40,119 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 05:03:40,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:03:40,813 INFO L124 PetriNetUnfolderBase]: 365/699 cut-off events. [2024-11-28 05:03:40,813 INFO L125 PetriNetUnfolderBase]: For 6668/6668 co-relation queries the response was YES. [2024-11-28 05:03:40,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4462 conditions, 699 events. 365/699 cut-off events. For 6668/6668 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 3224 event pairs, 124 based on Foata normal form. 8/705 useless extension candidates. Maximal degree in co-relation 4393. Up to 519 conditions per place. [2024-11-28 05:03:40,819 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 127 selfloop transitions, 33 changer transitions 2/163 dead transitions. [2024-11-28 05:03:40,819 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 163 transitions, 2016 flow [2024-11-28 05:03:40,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-28 05:03:40,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-11-28 05:03:40,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 127 transitions. [2024-11-28 05:03:40,820 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.36079545454545453 [2024-11-28 05:03:40,820 INFO L175 Difference]: Start difference. First operand has 133 places, 116 transitions, 1204 flow. Second operand 16 states and 127 transitions. [2024-11-28 05:03:40,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 163 transitions, 2016 flow [2024-11-28 05:03:40,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 163 transitions, 1929 flow, removed 7 selfloop flow, removed 10 redundant places. [2024-11-28 05:03:40,835 INFO L231 Difference]: Finished difference. Result has 142 places, 122 transitions, 1292 flow [2024-11-28 05:03:40,835 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1117, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1292, PETRI_PLACES=142, PETRI_TRANSITIONS=122} [2024-11-28 05:03:40,835 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 120 predicate places. [2024-11-28 05:03:40,835 INFO L471 AbstractCegarLoop]: Abstraction has has 142 places, 122 transitions, 1292 flow [2024-11-28 05:03:40,835 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.0) internal successors, (100), 20 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:03:40,835 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:03:40,835 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:03:40,845 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-11-28 05:03:41,036 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-11-28 05:03:41,036 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:03:41,036 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:03:41,036 INFO L85 PathProgramCache]: Analyzing trace with hash 1645071418, now seen corresponding path program 19 times [2024-11-28 05:03:41,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:03:41,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115604936] [2024-11-28 05:03:41,037 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 05:03:41,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:03:41,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:03:41,690 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-28 05:03:41,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:03:41,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115604936] [2024-11-28 05:03:41,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115604936] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:03:41,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138460802] [2024-11-28 05:03:41,691 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 05:03:41,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:03:41,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:03:41,692 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:03:41,694 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-28 05:03:41,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:03:41,868 INFO L256 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-28 05:03:41,869 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:03:41,983 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:03:41,983 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:03:42,149 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-11-28 05:03:42,149 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2024-11-28 05:03:42,217 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:03:42,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138460802] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:03:42,217 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:03:42,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 19 [2024-11-28 05:03:42,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575913199] [2024-11-28 05:03:42,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:03:42,218 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-28 05:03:42,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:03:42,218 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-28 05:03:42,218 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2024-11-28 05:03:42,219 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 05:03:42,219 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 122 transitions, 1292 flow. Second operand has 19 states, 19 states have (on average 5.2105263157894735) internal successors, (99), 19 states have internal predecessors, (99), 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) [2024-11-28 05:03:42,219 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:03:42,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 05:03:42,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:03:42,636 INFO L124 PetriNetUnfolderBase]: 362/696 cut-off events. [2024-11-28 05:03:42,637 INFO L125 PetriNetUnfolderBase]: For 7234/7234 co-relation queries the response was YES. [2024-11-28 05:03:42,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4569 conditions, 696 events. 362/696 cut-off events. For 7234/7234 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 3240 event pairs, 145 based on Foata normal form. 3/697 useless extension candidates. Maximal degree in co-relation 4496. Up to 591 conditions per place. [2024-11-28 05:03:42,649 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 105 selfloop transitions, 23 changer transitions 8/137 dead transitions. [2024-11-28 05:03:42,650 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 137 transitions, 1671 flow [2024-11-28 05:03:42,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-28 05:03:42,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-28 05:03:42,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 67 transitions. [2024-11-28 05:03:42,652 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3383838383838384 [2024-11-28 05:03:42,653 INFO L175 Difference]: Start difference. First operand has 142 places, 122 transitions, 1292 flow. Second operand 9 states and 67 transitions. [2024-11-28 05:03:42,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 137 transitions, 1671 flow [2024-11-28 05:03:42,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 137 transitions, 1589 flow, removed 17 selfloop flow, removed 9 redundant places. [2024-11-28 05:03:42,682 INFO L231 Difference]: Finished difference. Result has 143 places, 122 transitions, 1263 flow [2024-11-28 05:03:42,682 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1210, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1263, PETRI_PLACES=143, PETRI_TRANSITIONS=122} [2024-11-28 05:03:42,683 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 121 predicate places. [2024-11-28 05:03:42,683 INFO L471 AbstractCegarLoop]: Abstraction has has 143 places, 122 transitions, 1263 flow [2024-11-28 05:03:42,683 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.2105263157894735) internal successors, (99), 19 states have internal predecessors, (99), 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) [2024-11-28 05:03:42,684 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:03:42,684 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:03:42,694 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-11-28 05:03:42,884 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-11-28 05:03:42,885 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:03:42,885 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:03:42,885 INFO L85 PathProgramCache]: Analyzing trace with hash 1127507136, now seen corresponding path program 20 times [2024-11-28 05:03:42,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:03:42,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636934680] [2024-11-28 05:03:42,886 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:03:42,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:03:42,937 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:03:42,937 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:03:43,535 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-28 05:03:43,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:03:43,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636934680] [2024-11-28 05:03:43,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636934680] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:03:43,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500350604] [2024-11-28 05:03:43,535 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:03:43,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:03:43,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:03:43,537 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:03:43,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-28 05:03:43,725 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:03:43,725 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:03:43,726 INFO L256 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-28 05:03:43,727 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:03:43,844 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:03:43,844 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 45 [2024-11-28 05:03:43,916 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:03:43,916 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:03:44,102 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-11-28 05:03:44,103 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2024-11-28 05:03:44,237 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:03:44,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500350604] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:03:44,237 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:03:44,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 20 [2024-11-28 05:03:44,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474924376] [2024-11-28 05:03:44,237 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:03:44,238 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-28 05:03:44,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:03:44,238 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-28 05:03:44,238 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2024-11-28 05:03:44,239 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 05:03:44,239 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 122 transitions, 1263 flow. Second operand has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:03:44,239 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:03:44,239 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 05:03:44,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:03:44,940 INFO L124 PetriNetUnfolderBase]: 367/704 cut-off events. [2024-11-28 05:03:44,940 INFO L125 PetriNetUnfolderBase]: For 7280/7280 co-relation queries the response was YES. [2024-11-28 05:03:44,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4636 conditions, 704 events. 367/704 cut-off events. For 7280/7280 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 3268 event pairs, 137 based on Foata normal form. 4/706 useless extension candidates. Maximal degree in co-relation 4559. Up to 572 conditions per place. [2024-11-28 05:03:44,944 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 115 selfloop transitions, 29 changer transitions 2/147 dead transitions. [2024-11-28 05:03:44,944 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 147 transitions, 1793 flow [2024-11-28 05:03:44,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-28 05:03:44,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-28 05:03:44,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 92 transitions. [2024-11-28 05:03:44,945 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3484848484848485 [2024-11-28 05:03:44,945 INFO L175 Difference]: Start difference. First operand has 143 places, 122 transitions, 1263 flow. Second operand 12 states and 92 transitions. [2024-11-28 05:03:44,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 147 transitions, 1793 flow [2024-11-28 05:03:44,967 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 147 transitions, 1739 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-11-28 05:03:44,969 INFO L231 Difference]: Finished difference. Result has 146 places, 123 transitions, 1292 flow [2024-11-28 05:03:44,969 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1211, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1292, PETRI_PLACES=146, PETRI_TRANSITIONS=123} [2024-11-28 05:03:44,970 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 124 predicate places. [2024-11-28 05:03:44,970 INFO L471 AbstractCegarLoop]: Abstraction has has 146 places, 123 transitions, 1292 flow [2024-11-28 05:03:44,970 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:03:44,970 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:03:44,970 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:03:44,982 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-11-28 05:03:45,170 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-11-28 05:03:45,171 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:03:45,171 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:03:45,171 INFO L85 PathProgramCache]: Analyzing trace with hash -1590305985, now seen corresponding path program 21 times [2024-11-28 05:03:45,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:03:45,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405483905] [2024-11-28 05:03:45,171 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 05:03:45,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:03:45,202 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-28 05:03:45,203 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:03:45,841 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-28 05:03:45,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:03:45,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405483905] [2024-11-28 05:03:45,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405483905] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:03:45,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277957408] [2024-11-28 05:03:45,841 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 05:03:45,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:03:45,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:03:45,844 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:03:45,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-28 05:03:46,032 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-28 05:03:46,032 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:03:46,034 INFO L256 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-11-28 05:03:46,035 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:03:46,230 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:03:46,231 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 30 [2024-11-28 05:03:46,301 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-28 05:03:46,302 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:03:46,463 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-11-28 05:03:46,463 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2024-11-28 05:03:46,558 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:03:46,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [277957408] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:03:46,558 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:03:46,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 20 [2024-11-28 05:03:46,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67146547] [2024-11-28 05:03:46,558 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:03:46,559 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-28 05:03:46,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:03:46,559 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-28 05:03:46,559 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2024-11-28 05:03:46,559 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 05:03:46,560 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 123 transitions, 1292 flow. Second operand has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 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) [2024-11-28 05:03:46,560 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:03:46,560 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 05:03:46,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:03:47,600 INFO L124 PetriNetUnfolderBase]: 401/785 cut-off events. [2024-11-28 05:03:47,600 INFO L125 PetriNetUnfolderBase]: For 8869/8869 co-relation queries the response was YES. [2024-11-28 05:03:47,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5201 conditions, 785 events. 401/785 cut-off events. For 8869/8869 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 3838 event pairs, 147 based on Foata normal form. 10/793 useless extension candidates. Maximal degree in co-relation 5124. Up to 592 conditions per place. [2024-11-28 05:03:47,605 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 140 selfloop transitions, 36 changer transitions 3/180 dead transitions. [2024-11-28 05:03:47,605 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 180 transitions, 2108 flow [2024-11-28 05:03:47,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-28 05:03:47,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-28 05:03:47,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 140 transitions. [2024-11-28 05:03:47,606 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.37433155080213903 [2024-11-28 05:03:47,606 INFO L175 Difference]: Start difference. First operand has 146 places, 123 transitions, 1292 flow. Second operand 17 states and 140 transitions. [2024-11-28 05:03:47,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 180 transitions, 2108 flow [2024-11-28 05:03:47,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 180 transitions, 2042 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-11-28 05:03:47,628 INFO L231 Difference]: Finished difference. Result has 159 places, 130 transitions, 1452 flow [2024-11-28 05:03:47,628 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1227, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1452, PETRI_PLACES=159, PETRI_TRANSITIONS=130} [2024-11-28 05:03:47,629 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 137 predicate places. [2024-11-28 05:03:47,629 INFO L471 AbstractCegarLoop]: Abstraction has has 159 places, 130 transitions, 1452 flow [2024-11-28 05:03:47,629 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 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) [2024-11-28 05:03:47,629 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:03:47,629 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:03:47,636 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-11-28 05:03:47,829 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:03:47,829 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:03:47,830 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:03:47,830 INFO L85 PathProgramCache]: Analyzing trace with hash 276266619, now seen corresponding path program 22 times [2024-11-28 05:03:47,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:03:47,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551239566] [2024-11-28 05:03:47,830 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 05:03:47,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:03:47,857 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 05:03:47,857 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:03:48,421 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-28 05:03:48,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:03:48,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551239566] [2024-11-28 05:03:48,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551239566] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:03:48,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563532008] [2024-11-28 05:03:48,422 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 05:03:48,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:03:48,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:03:48,424 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:03:48,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-28 05:03:48,613 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 05:03:48,613 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:03:48,615 INFO L256 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-28 05:03:48,616 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:03:48,781 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2024-11-28 05:03:48,782 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 31 [2024-11-28 05:03:48,803 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-28 05:03:48,804 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:03:49,035 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-11-28 05:03:49,035 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2024-11-28 05:03:49,140 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:03:49,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563532008] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:03:49,140 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:03:49,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 23 [2024-11-28 05:03:49,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222424791] [2024-11-28 05:03:49,140 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:03:49,141 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-28 05:03:49,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:03:49,141 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-28 05:03:49,141 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2024-11-28 05:03:49,141 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 05:03:49,142 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 130 transitions, 1452 flow. Second operand has 23 states, 23 states have (on average 5.130434782608695) internal successors, (118), 23 states have internal predecessors, (118), 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) [2024-11-28 05:03:49,142 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:03:49,142 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 05:03:49,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:03:49,710 INFO L124 PetriNetUnfolderBase]: 399/783 cut-off events. [2024-11-28 05:03:49,710 INFO L125 PetriNetUnfolderBase]: For 10944/10944 co-relation queries the response was YES. [2024-11-28 05:03:49,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5557 conditions, 783 events. 399/783 cut-off events. For 10944/10944 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 3829 event pairs, 65 based on Foata normal form. 2/783 useless extension candidates. Maximal degree in co-relation 5475. Up to 675 conditions per place. [2024-11-28 05:03:49,716 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 115 selfloop transitions, 23 changer transitions 7/146 dead transitions. [2024-11-28 05:03:49,717 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 146 transitions, 1865 flow [2024-11-28 05:03:49,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-28 05:03:49,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-28 05:03:49,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 74 transitions. [2024-11-28 05:03:49,718 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.33636363636363636 [2024-11-28 05:03:49,718 INFO L175 Difference]: Start difference. First operand has 159 places, 130 transitions, 1452 flow. Second operand 10 states and 74 transitions. [2024-11-28 05:03:49,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 146 transitions, 1865 flow [2024-11-28 05:03:49,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 146 transitions, 1730 flow, removed 49 selfloop flow, removed 8 redundant places. [2024-11-28 05:03:49,753 INFO L231 Difference]: Finished difference. Result has 162 places, 130 transitions, 1371 flow [2024-11-28 05:03:49,753 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1318, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1371, PETRI_PLACES=162, PETRI_TRANSITIONS=130} [2024-11-28 05:03:49,754 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 140 predicate places. [2024-11-28 05:03:49,754 INFO L471 AbstractCegarLoop]: Abstraction has has 162 places, 130 transitions, 1371 flow [2024-11-28 05:03:49,754 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.130434782608695) internal successors, (118), 23 states have internal predecessors, (118), 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) [2024-11-28 05:03:49,754 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:03:49,754 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:03:49,761 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-11-28 05:03:49,955 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:03:49,955 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:03:49,955 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:03:49,955 INFO L85 PathProgramCache]: Analyzing trace with hash -1848629923, now seen corresponding path program 23 times [2024-11-28 05:03:49,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:03:49,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293302971] [2024-11-28 05:03:49,955 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 05:03:49,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:03:50,003 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-11-28 05:03:50,003 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:03:50,693 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-28 05:03:50,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:03:50,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293302971] [2024-11-28 05:03:50,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293302971] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:03:50,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002731110] [2024-11-28 05:03:50,694 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 05:03:50,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:03:50,694 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:03:50,696 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:03:50,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-28 05:03:51,275 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-11-28 05:03:51,275 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:03:51,278 INFO L256 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-11-28 05:03:51,279 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:03:51,313 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 19 treesize of output 1 [2024-11-28 05:03:51,473 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:03:51,473 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 41 [2024-11-28 05:03:51,535 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-28 05:03:51,536 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:03:51,763 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:03:51,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002731110] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:03:51,763 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:03:51,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 7] total 23 [2024-11-28 05:03:51,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415752203] [2024-11-28 05:03:51,764 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:03:51,764 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-28 05:03:51,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:03:51,765 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-28 05:03:51,765 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2024-11-28 05:03:51,766 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 05:03:51,766 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 130 transitions, 1371 flow. Second operand has 23 states, 23 states have (on average 5.130434782608695) internal successors, (118), 23 states have internal predecessors, (118), 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) [2024-11-28 05:03:51,766 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:03:51,766 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 05:03:51,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:03:52,421 INFO L124 PetriNetUnfolderBase]: 392/760 cut-off events. [2024-11-28 05:03:52,421 INFO L125 PetriNetUnfolderBase]: For 11248/11248 co-relation queries the response was YES. [2024-11-28 05:03:52,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5302 conditions, 760 events. 392/760 cut-off events. For 11248/11248 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 3634 event pairs, 154 based on Foata normal form. 2/760 useless extension candidates. Maximal degree in co-relation 5216. Up to 633 conditions per place. [2024-11-28 05:03:52,426 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 111 selfloop transitions, 33 changer transitions 5/150 dead transitions. [2024-11-28 05:03:52,426 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 150 transitions, 1803 flow [2024-11-28 05:03:52,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-28 05:03:52,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-28 05:03:52,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 90 transitions. [2024-11-28 05:03:52,427 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3409090909090909 [2024-11-28 05:03:52,427 INFO L175 Difference]: Start difference. First operand has 162 places, 130 transitions, 1371 flow. Second operand 12 states and 90 transitions. [2024-11-28 05:03:52,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 150 transitions, 1803 flow [2024-11-28 05:03:52,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 150 transitions, 1739 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-11-28 05:03:52,452 INFO L231 Difference]: Finished difference. Result has 163 places, 128 transitions, 1357 flow [2024-11-28 05:03:52,452 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1295, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1357, PETRI_PLACES=163, PETRI_TRANSITIONS=128} [2024-11-28 05:03:52,453 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 141 predicate places. [2024-11-28 05:03:52,453 INFO L471 AbstractCegarLoop]: Abstraction has has 163 places, 128 transitions, 1357 flow [2024-11-28 05:03:52,453 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.130434782608695) internal successors, (118), 23 states have internal predecessors, (118), 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) [2024-11-28 05:03:52,453 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:03:52,453 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:03:52,459 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2024-11-28 05:03:52,653 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:03:52,653 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:03:52,655 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:03:52,656 INFO L85 PathProgramCache]: Analyzing trace with hash 475022467, now seen corresponding path program 24 times [2024-11-28 05:03:52,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:03:52,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091645375] [2024-11-28 05:03:52,656 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 05:03:52,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:03:52,693 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-11-28 05:03:52,694 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:03:53,231 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-28 05:03:53,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:03:53,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091645375] [2024-11-28 05:03:53,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091645375] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:03:53,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615353132] [2024-11-28 05:03:53,232 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 05:03:53,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:03:53,232 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:03:53,236 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:03:53,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-11-28 05:03:53,445 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-11-28 05:03:53,445 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:03:53,448 INFO L256 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-11-28 05:03:53,449 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:03:53,660 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-11-28 05:03:53,660 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2024-11-28 05:03:53,692 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-28 05:03:53,692 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:03:53,860 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-11-28 05:03:53,860 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2024-11-28 05:03:53,974 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:03:53,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615353132] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:03:53,974 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:03:53,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 21 [2024-11-28 05:03:53,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315719666] [2024-11-28 05:03:53,974 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:03:53,974 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-28 05:03:53,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:03:53,975 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-28 05:03:53,975 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2024-11-28 05:03:53,975 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 05:03:53,975 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 128 transitions, 1357 flow. Second operand has 21 states, 21 states have (on average 5.333333333333333) internal successors, (112), 21 states have internal predecessors, (112), 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) [2024-11-28 05:03:53,975 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:03:53,975 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 05:03:53,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:03:54,483 INFO L124 PetriNetUnfolderBase]: 378/724 cut-off events. [2024-11-28 05:03:54,484 INFO L125 PetriNetUnfolderBase]: For 10761/10761 co-relation queries the response was YES. [2024-11-28 05:03:54,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5144 conditions, 724 events. 378/724 cut-off events. For 10761/10761 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 3375 event pairs, 152 based on Foata normal form. 5/727 useless extension candidates. Maximal degree in co-relation 5059. Up to 607 conditions per place. [2024-11-28 05:03:54,488 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 114 selfloop transitions, 26 changer transitions 0/141 dead transitions. [2024-11-28 05:03:54,488 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 141 transitions, 1747 flow [2024-11-28 05:03:54,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-28 05:03:54,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-28 05:03:54,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 69 transitions. [2024-11-28 05:03:54,489 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3484848484848485 [2024-11-28 05:03:54,489 INFO L175 Difference]: Start difference. First operand has 163 places, 128 transitions, 1357 flow. Second operand 9 states and 69 transitions. [2024-11-28 05:03:54,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 141 transitions, 1747 flow [2024-11-28 05:03:54,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 141 transitions, 1667 flow, removed 4 selfloop flow, removed 13 redundant places. [2024-11-28 05:03:54,516 INFO L231 Difference]: Finished difference. Result has 155 places, 126 transitions, 1320 flow [2024-11-28 05:03:54,516 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1268, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1320, PETRI_PLACES=155, PETRI_TRANSITIONS=126} [2024-11-28 05:03:54,516 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 133 predicate places. [2024-11-28 05:03:54,516 INFO L471 AbstractCegarLoop]: Abstraction has has 155 places, 126 transitions, 1320 flow [2024-11-28 05:03:54,516 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.333333333333333) internal successors, (112), 21 states have internal predecessors, (112), 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) [2024-11-28 05:03:54,517 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:03:54,517 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:03:54,527 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2024-11-28 05:03:54,717 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:03:54,717 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:03:54,717 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:03:54,718 INFO L85 PathProgramCache]: Analyzing trace with hash 1983611103, now seen corresponding path program 25 times [2024-11-28 05:03:54,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:03:54,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709483458] [2024-11-28 05:03:54,718 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 05:03:54,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:03:54,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:03:55,223 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-28 05:03:55,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:03:55,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709483458] [2024-11-28 05:03:55,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709483458] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:03:55,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398549329] [2024-11-28 05:03:55,224 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 05:03:55,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:03:55,224 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:03:55,227 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:03:55,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-11-28 05:03:55,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:03:55,433 INFO L256 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-28 05:03:55,435 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:03:55,517 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:03:55,518 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 45 [2024-11-28 05:03:55,581 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:03:55,582 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:03:55,801 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-11-28 05:03:55,801 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2024-11-28 05:03:55,850 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:03:55,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398549329] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:03:55,850 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:03:55,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 19 [2024-11-28 05:03:55,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106140863] [2024-11-28 05:03:55,850 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:03:55,851 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-28 05:03:55,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:03:55,851 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-28 05:03:55,851 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2024-11-28 05:03:55,852 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 05:03:55,852 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 126 transitions, 1320 flow. Second operand has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:03:55,852 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:03:55,852 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 05:03:55,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:03:56,415 INFO L124 PetriNetUnfolderBase]: 372/702 cut-off events. [2024-11-28 05:03:56,415 INFO L125 PetriNetUnfolderBase]: For 10786/10786 co-relation queries the response was YES. [2024-11-28 05:03:56,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4985 conditions, 702 events. 372/702 cut-off events. For 10786/10786 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 3215 event pairs, 136 based on Foata normal form. 2/702 useless extension candidates. Maximal degree in co-relation 4902. Up to 560 conditions per place. [2024-11-28 05:03:56,420 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 109 selfloop transitions, 30 changer transitions 5/145 dead transitions. [2024-11-28 05:03:56,421 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 145 transitions, 1731 flow [2024-11-28 05:03:56,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-28 05:03:56,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-28 05:03:56,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 85 transitions. [2024-11-28 05:03:56,422 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3512396694214876 [2024-11-28 05:03:56,422 INFO L175 Difference]: Start difference. First operand has 155 places, 126 transitions, 1320 flow. Second operand 11 states and 85 transitions. [2024-11-28 05:03:56,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 145 transitions, 1731 flow [2024-11-28 05:03:56,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 145 transitions, 1673 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-11-28 05:03:56,458 INFO L231 Difference]: Finished difference. Result has 154 places, 123 transitions, 1301 flow [2024-11-28 05:03:56,458 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1247, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1301, PETRI_PLACES=154, PETRI_TRANSITIONS=123} [2024-11-28 05:03:56,459 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 132 predicate places. [2024-11-28 05:03:56,459 INFO L471 AbstractCegarLoop]: Abstraction has has 154 places, 123 transitions, 1301 flow [2024-11-28 05:03:56,459 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:03:56,459 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:03:56,459 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:03:56,470 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2024-11-28 05:03:56,660 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2024-11-28 05:03:56,660 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:03:56,661 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:03:56,661 INFO L85 PathProgramCache]: Analyzing trace with hash -1510364992, now seen corresponding path program 26 times [2024-11-28 05:03:56,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:03:56,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008574511] [2024-11-28 05:03:56,661 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:03:56,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:03:56,695 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:03:56,695 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:03:57,262 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-28 05:03:57,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:03:57,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008574511] [2024-11-28 05:03:57,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008574511] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:03:57,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758777173] [2024-11-28 05:03:57,263 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:03:57,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:03:57,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:03:57,265 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:03:57,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-11-28 05:03:57,480 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:03:57,480 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:03:57,481 INFO L256 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-28 05:03:57,482 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:03:57,589 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:03:57,589 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 45 [2024-11-28 05:03:57,648 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:03:57,648 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:03:57,799 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-11-28 05:03:57,799 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2024-11-28 05:03:57,924 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:03:57,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758777173] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:03:57,924 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:03:57,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 20 [2024-11-28 05:03:57,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408738076] [2024-11-28 05:03:57,924 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:03:57,925 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-28 05:03:57,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:03:57,925 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-28 05:03:57,925 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2024-11-28 05:03:57,925 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 05:03:57,925 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 123 transitions, 1301 flow. Second operand has 20 states, 20 states have (on average 5.0) internal successors, (100), 20 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:03:57,925 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:03:57,925 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 05:03:57,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:03:58,601 INFO L124 PetriNetUnfolderBase]: 360/675 cut-off events. [2024-11-28 05:03:58,601 INFO L125 PetriNetUnfolderBase]: For 10144/10144 co-relation queries the response was YES. [2024-11-28 05:03:58,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4800 conditions, 675 events. 360/675 cut-off events. For 10144/10144 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 3018 event pairs, 137 based on Foata normal form. 3/676 useless extension candidates. Maximal degree in co-relation 4718. Up to 574 conditions per place. [2024-11-28 05:03:58,606 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 108 selfloop transitions, 26 changer transitions 3/138 dead transitions. [2024-11-28 05:03:58,606 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 138 transitions, 1733 flow [2024-11-28 05:03:58,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-28 05:03:58,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-28 05:03:58,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 79 transitions. [2024-11-28 05:03:58,609 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.32644628099173556 [2024-11-28 05:03:58,609 INFO L175 Difference]: Start difference. First operand has 154 places, 123 transitions, 1301 flow. Second operand 11 states and 79 transitions. [2024-11-28 05:03:58,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 138 transitions, 1733 flow [2024-11-28 05:03:58,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 138 transitions, 1670 flow, removed 1 selfloop flow, removed 11 redundant places. [2024-11-28 05:03:58,643 INFO L231 Difference]: Finished difference. Result has 150 places, 121 transitions, 1270 flow [2024-11-28 05:03:58,643 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1228, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1270, PETRI_PLACES=150, PETRI_TRANSITIONS=121} [2024-11-28 05:03:58,644 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 128 predicate places. [2024-11-28 05:03:58,644 INFO L471 AbstractCegarLoop]: Abstraction has has 150 places, 121 transitions, 1270 flow [2024-11-28 05:03:58,644 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.0) internal successors, (100), 20 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:03:58,644 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:03:58,644 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:03:58,656 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2024-11-28 05:03:58,845 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:03:58,845 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:03:58,845 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:03:58,845 INFO L85 PathProgramCache]: Analyzing trace with hash -2096729610, now seen corresponding path program 27 times [2024-11-28 05:03:58,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:03:58,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194618844] [2024-11-28 05:03:58,846 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 05:03:58,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:03:58,869 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-28 05:03:58,869 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:03:59,298 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-28 05:03:59,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:03:59,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194618844] [2024-11-28 05:03:59,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194618844] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:03:59,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150765717] [2024-11-28 05:03:59,298 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 05:03:59,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:03:59,299 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:03:59,300 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:03:59,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-11-28 05:03:59,501 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-28 05:03:59,501 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:03:59,503 INFO L256 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-28 05:03:59,504 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:03:59,733 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-28 05:03:59,733 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:03:59,896 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-11-28 05:03:59,896 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2024-11-28 05:04:00,015 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:04:00,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150765717] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:04:00,015 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:04:00,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 20 [2024-11-28 05:04:00,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955300393] [2024-11-28 05:04:00,016 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:04:00,016 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-28 05:04:00,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:04:00,016 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-28 05:04:00,016 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2024-11-28 05:04:00,017 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 05:04:00,017 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 121 transitions, 1270 flow. Second operand has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 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) [2024-11-28 05:04:00,017 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:04:00,017 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 05:04:00,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:04:00,459 INFO L124 PetriNetUnfolderBase]: 347/641 cut-off events. [2024-11-28 05:04:00,459 INFO L125 PetriNetUnfolderBase]: For 8974/8974 co-relation queries the response was YES. [2024-11-28 05:04:00,461 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4541 conditions, 641 events. 347/641 cut-off events. For 8974/8974 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 2760 event pairs, 134 based on Foata normal form. 4/643 useless extension candidates. Maximal degree in co-relation 4460. Up to 544 conditions per place. [2024-11-28 05:04:00,463 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 107 selfloop transitions, 24 changer transitions 0/132 dead transitions. [2024-11-28 05:04:00,463 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 132 transitions, 1670 flow [2024-11-28 05:04:00,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-28 05:04:00,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-28 05:04:00,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 67 transitions. [2024-11-28 05:04:00,464 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3383838383838384 [2024-11-28 05:04:00,464 INFO L175 Difference]: Start difference. First operand has 150 places, 121 transitions, 1270 flow. Second operand 9 states and 67 transitions. [2024-11-28 05:04:00,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 132 transitions, 1670 flow [2024-11-28 05:04:00,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 132 transitions, 1610 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-11-28 05:04:00,485 INFO L231 Difference]: Finished difference. Result has 144 places, 119 transitions, 1241 flow [2024-11-28 05:04:00,485 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1193, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1241, PETRI_PLACES=144, PETRI_TRANSITIONS=119} [2024-11-28 05:04:00,486 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 122 predicate places. [2024-11-28 05:04:00,486 INFO L471 AbstractCegarLoop]: Abstraction has has 144 places, 119 transitions, 1241 flow [2024-11-28 05:04:00,486 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 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) [2024-11-28 05:04:00,486 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:04:00,486 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:04:00,493 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2024-11-28 05:04:00,686 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2024-11-28 05:04:00,687 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:04:00,687 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:04:00,687 INFO L85 PathProgramCache]: Analyzing trace with hash 118316084, now seen corresponding path program 28 times [2024-11-28 05:04:00,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:04:00,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614474648] [2024-11-28 05:04:00,687 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 05:04:00,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:04:00,724 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 05:04:00,724 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:04:01,591 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 23 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-28 05:04:01,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:04:01,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614474648] [2024-11-28 05:04:01,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614474648] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:04:01,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624595064] [2024-11-28 05:04:01,592 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 05:04:01,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:04:01,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:04:01,593 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:04:01,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-11-28 05:04:01,802 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 05:04:01,802 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:04:01,804 INFO L256 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-28 05:04:01,805 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:04:01,890 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:04:01,890 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 45 [2024-11-28 05:04:01,953 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:04:01,953 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:04:02,173 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-11-28 05:04:02,173 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2024-11-28 05:04:02,243 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:04:02,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624595064] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:04:02,244 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:04:02,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 7, 7] total 25 [2024-11-28 05:04:02,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923068077] [2024-11-28 05:04:02,244 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:04:02,244 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-28 05:04:02,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:04:02,245 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-28 05:04:02,245 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2024-11-28 05:04:02,245 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 05:04:02,246 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 119 transitions, 1241 flow. Second operand has 25 states, 25 states have (on average 4.88) internal successors, (122), 25 states have internal predecessors, (122), 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) [2024-11-28 05:04:02,246 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:04:02,246 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 05:04:02,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:04:02,863 INFO L124 PetriNetUnfolderBase]: 340/625 cut-off events. [2024-11-28 05:04:02,863 INFO L125 PetriNetUnfolderBase]: For 9066/9066 co-relation queries the response was YES. [2024-11-28 05:04:02,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4403 conditions, 625 events. 340/625 cut-off events. For 9066/9066 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 2687 event pairs, 124 based on Foata normal form. 3/626 useless extension candidates. Maximal degree in co-relation 4323. Up to 514 conditions per place. [2024-11-28 05:04:02,867 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 86 selfloop transitions, 44 changer transitions 3/134 dead transitions. [2024-11-28 05:04:02,867 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 134 transitions, 1663 flow [2024-11-28 05:04:02,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-28 05:04:02,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-11-28 05:04:02,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 104 transitions. [2024-11-28 05:04:02,868 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.29545454545454547 [2024-11-28 05:04:02,868 INFO L175 Difference]: Start difference. First operand has 144 places, 119 transitions, 1241 flow. Second operand 16 states and 104 transitions. [2024-11-28 05:04:02,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 134 transitions, 1663 flow [2024-11-28 05:04:02,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 134 transitions, 1615 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-11-28 05:04:02,886 INFO L231 Difference]: Finished difference. Result has 150 places, 117 transitions, 1266 flow [2024-11-28 05:04:02,886 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1187, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1266, PETRI_PLACES=150, PETRI_TRANSITIONS=117} [2024-11-28 05:04:02,887 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 128 predicate places. [2024-11-28 05:04:02,887 INFO L471 AbstractCegarLoop]: Abstraction has has 150 places, 117 transitions, 1266 flow [2024-11-28 05:04:02,887 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.88) internal successors, (122), 25 states have internal predecessors, (122), 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) [2024-11-28 05:04:02,887 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:04:02,887 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:04:02,894 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2024-11-28 05:04:03,087 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2024-11-28 05:04:03,087 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:04:03,088 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:04:03,088 INFO L85 PathProgramCache]: Analyzing trace with hash -2081572418, now seen corresponding path program 29 times [2024-11-28 05:04:03,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:04:03,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021489143] [2024-11-28 05:04:03,088 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 05:04:03,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:04:03,133 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-11-28 05:04:03,133 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:04:03,630 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-28 05:04:03,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:04:03,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021489143] [2024-11-28 05:04:03,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021489143] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:04:03,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691482563] [2024-11-28 05:04:03,630 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 05:04:03,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:04:03,631 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:04:03,633 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:04:03,635 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-11-28 05:04:04,043 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-11-28 05:04:04,044 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:04:04,046 INFO L256 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-11-28 05:04:04,047 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:04:04,076 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-11-28 05:04:04,203 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-28 05:04:04,203 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:04:04,344 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:04:04,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691482563] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:04:04,344 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:04:04,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 7] total 22 [2024-11-28 05:04:04,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413202547] [2024-11-28 05:04:04,345 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:04:04,345 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-28 05:04:04,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:04:04,345 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-28 05:04:04,346 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2024-11-28 05:04:04,346 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 05:04:04,346 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 117 transitions, 1266 flow. Second operand has 22 states, 22 states have (on average 5.318181818181818) internal successors, (117), 22 states have internal predecessors, (117), 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) [2024-11-28 05:04:04,346 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:04:04,346 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 05:04:04,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:04:04,957 INFO L124 PetriNetUnfolderBase]: 351/641 cut-off events. [2024-11-28 05:04:04,957 INFO L125 PetriNetUnfolderBase]: For 9353/9353 co-relation queries the response was YES. [2024-11-28 05:04:04,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4606 conditions, 641 events. 351/641 cut-off events. For 9353/9353 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 2744 event pairs, 33 based on Foata normal form. 4/643 useless extension candidates. Maximal degree in co-relation 4525. Up to 253 conditions per place. [2024-11-28 05:04:04,961 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 90 selfloop transitions, 52 changer transitions 1/144 dead transitions. [2024-11-28 05:04:04,961 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 144 transitions, 1899 flow [2024-11-28 05:04:04,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-28 05:04:04,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-28 05:04:04,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 82 transitions. [2024-11-28 05:04:04,962 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.33884297520661155 [2024-11-28 05:04:04,962 INFO L175 Difference]: Start difference. First operand has 150 places, 117 transitions, 1266 flow. Second operand 11 states and 82 transitions. [2024-11-28 05:04:04,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 144 transitions, 1899 flow [2024-11-28 05:04:04,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 144 transitions, 1809 flow, removed 0 selfloop flow, removed 14 redundant places. [2024-11-28 05:04:04,982 INFO L231 Difference]: Finished difference. Result has 146 places, 119 transitions, 1324 flow [2024-11-28 05:04:04,983 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1178, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1324, PETRI_PLACES=146, PETRI_TRANSITIONS=119} [2024-11-28 05:04:04,983 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 124 predicate places. [2024-11-28 05:04:04,983 INFO L471 AbstractCegarLoop]: Abstraction has has 146 places, 119 transitions, 1324 flow [2024-11-28 05:04:04,983 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.318181818181818) internal successors, (117), 22 states have internal predecessors, (117), 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) [2024-11-28 05:04:04,983 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:04:04,983 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:04:04,991 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2024-11-28 05:04:05,184 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2024-11-28 05:04:05,184 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:04:05,184 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:04:05,184 INFO L85 PathProgramCache]: Analyzing trace with hash -1508481241, now seen corresponding path program 30 times [2024-11-28 05:04:05,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:04:05,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567707338] [2024-11-28 05:04:05,185 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 05:04:05,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:04:05,208 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-28 05:04:05,208 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:04:05,742 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-28 05:04:05,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:04:05,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567707338] [2024-11-28 05:04:05,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567707338] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:04:05,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865815174] [2024-11-28 05:04:05,742 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 05:04:05,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:04:05,742 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:04:05,744 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:04:05,745 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-11-28 05:04:05,952 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-28 05:04:05,952 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:04:05,954 INFO L256 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-28 05:04:05,955 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:04:06,113 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:04:06,113 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:04:06,359 INFO L349 Elim1Store]: treesize reduction 24, result has 65.2 percent of original size [2024-11-28 05:04:06,360 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 67 [2024-11-28 05:04:06,423 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:04:06,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865815174] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:04:06,423 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:04:06,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 8] total 21 [2024-11-28 05:04:06,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726828653] [2024-11-28 05:04:06,423 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:04:06,423 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-28 05:04:06,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:04:06,424 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-28 05:04:06,424 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2024-11-28 05:04:06,424 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 05:04:06,424 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 119 transitions, 1324 flow. Second operand has 21 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 21 states have internal predecessors, (104), 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) [2024-11-28 05:04:06,424 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:04:06,424 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 05:04:06,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:04:07,369 INFO L124 PetriNetUnfolderBase]: 351/647 cut-off events. [2024-11-28 05:04:07,369 INFO L125 PetriNetUnfolderBase]: For 10452/10452 co-relation queries the response was YES. [2024-11-28 05:04:07,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4757 conditions, 647 events. 351/647 cut-off events. For 10452/10452 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 2836 event pairs, 54 based on Foata normal form. 2/649 useless extension candidates. Maximal degree in co-relation 4675. Up to 283 conditions per place. [2024-11-28 05:04:07,373 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 95 selfloop transitions, 55 changer transitions 10/161 dead transitions. [2024-11-28 05:04:07,373 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 161 transitions, 2095 flow [2024-11-28 05:04:07,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-28 05:04:07,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-28 05:04:07,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 105 transitions. [2024-11-28 05:04:07,374 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3409090909090909 [2024-11-28 05:04:07,374 INFO L175 Difference]: Start difference. First operand has 146 places, 119 transitions, 1324 flow. Second operand 14 states and 105 transitions. [2024-11-28 05:04:07,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 161 transitions, 2095 flow [2024-11-28 05:04:07,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 161 transitions, 1956 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-11-28 05:04:07,398 INFO L231 Difference]: Finished difference. Result has 153 places, 122 transitions, 1421 flow [2024-11-28 05:04:07,399 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1187, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1421, PETRI_PLACES=153, PETRI_TRANSITIONS=122} [2024-11-28 05:04:07,399 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 131 predicate places. [2024-11-28 05:04:07,399 INFO L471 AbstractCegarLoop]: Abstraction has has 153 places, 122 transitions, 1421 flow [2024-11-28 05:04:07,399 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 21 states have internal predecessors, (104), 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) [2024-11-28 05:04:07,399 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:04:07,399 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:04:07,407 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2024-11-28 05:04:07,600 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2024-11-28 05:04:07,600 INFO L396 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:04:07,600 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:04:07,600 INFO L85 PathProgramCache]: Analyzing trace with hash 640855652, now seen corresponding path program 31 times [2024-11-28 05:04:07,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:04:07,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020981808] [2024-11-28 05:04:07,601 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 05:04:07,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:04:07,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:04:08,413 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-28 05:04:08,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:04:08,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020981808] [2024-11-28 05:04:08,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020981808] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:04:08,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004033579] [2024-11-28 05:04:08,414 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 05:04:08,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:04:08,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:04:08,418 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:04:08,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-11-28 05:04:08,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:04:08,634 INFO L256 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-28 05:04:08,635 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:04:08,723 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-11-28 05:04:08,723 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2024-11-28 05:04:08,730 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:04:08,730 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:04:08,881 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-11-28 05:04:08,881 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2024-11-28 05:04:08,936 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:04:08,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004033579] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:04:08,937 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:04:08,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 7, 7] total 23 [2024-11-28 05:04:08,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14198223] [2024-11-28 05:04:08,937 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:04:08,937 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-28 05:04:08,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:04:08,937 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-28 05:04:08,938 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2024-11-28 05:04:08,938 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 05:04:08,938 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 122 transitions, 1421 flow. Second operand has 23 states, 23 states have (on average 4.826086956521739) internal successors, (111), 23 states have internal predecessors, (111), 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) [2024-11-28 05:04:08,938 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:04:08,938 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 05:04:08,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:04:09,495 INFO L124 PetriNetUnfolderBase]: 360/656 cut-off events. [2024-11-28 05:04:09,495 INFO L125 PetriNetUnfolderBase]: For 11362/11362 co-relation queries the response was YES. [2024-11-28 05:04:09,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5076 conditions, 656 events. 360/656 cut-off events. For 11362/11362 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 2845 event pairs, 127 based on Foata normal form. 4/658 useless extension candidates. Maximal degree in co-relation 4993. Up to 537 conditions per place. [2024-11-28 05:04:09,499 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 92 selfloop transitions, 44 changer transitions 0/137 dead transitions. [2024-11-28 05:04:09,499 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 137 transitions, 1892 flow [2024-11-28 05:04:09,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-28 05:04:09,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-28 05:04:09,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 92 transitions. [2024-11-28 05:04:09,500 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.2987012987012987 [2024-11-28 05:04:09,500 INFO L175 Difference]: Start difference. First operand has 153 places, 122 transitions, 1421 flow. Second operand 14 states and 92 transitions. [2024-11-28 05:04:09,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 137 transitions, 1892 flow [2024-11-28 05:04:09,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 137 transitions, 1745 flow, removed 38 selfloop flow, removed 9 redundant places. [2024-11-28 05:04:09,525 INFO L231 Difference]: Finished difference. Result has 157 places, 124 transitions, 1410 flow [2024-11-28 05:04:09,525 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1278, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1410, PETRI_PLACES=157, PETRI_TRANSITIONS=124} [2024-11-28 05:04:09,526 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 135 predicate places. [2024-11-28 05:04:09,526 INFO L471 AbstractCegarLoop]: Abstraction has has 157 places, 124 transitions, 1410 flow [2024-11-28 05:04:09,526 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.826086956521739) internal successors, (111), 23 states have internal predecessors, (111), 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) [2024-11-28 05:04:09,526 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:04:09,526 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:04:09,537 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2024-11-28 05:04:09,726 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2024-11-28 05:04:09,727 INFO L396 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:04:09,727 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:04:09,727 INFO L85 PathProgramCache]: Analyzing trace with hash 1468261602, now seen corresponding path program 32 times [2024-11-28 05:04:09,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:04:09,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900932575] [2024-11-28 05:04:09,727 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:04:09,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:04:09,751 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:04:09,751 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:04:10,389 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-28 05:04:10,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:04:10,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900932575] [2024-11-28 05:04:10,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900932575] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:04:10,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739412591] [2024-11-28 05:04:10,389 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:04:10,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:04:10,390 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:04:10,393 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:04:10,396 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2024-11-28 05:04:10,624 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:04:10,624 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:04:10,625 INFO L256 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-28 05:04:10,626 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:04:10,752 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:04:10,752 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 34 [2024-11-28 05:04:10,815 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:04:10,815 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:04:11,028 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-11-28 05:04:11,028 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2024-11-28 05:04:11,072 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:04:11,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739412591] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:04:11,072 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:04:11,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 20 [2024-11-28 05:04:11,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164806110] [2024-11-28 05:04:11,072 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:04:11,072 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-28 05:04:11,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:04:11,073 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-28 05:04:11,073 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2024-11-28 05:04:11,073 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 05:04:11,073 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 124 transitions, 1410 flow. Second operand has 20 states, 20 states have (on average 5.15) internal successors, (103), 20 states have internal predecessors, (103), 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) [2024-11-28 05:04:11,073 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:04:11,073 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 05:04:11,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:04:12,120 INFO L124 PetriNetUnfolderBase]: 368/677 cut-off events. [2024-11-28 05:04:12,121 INFO L125 PetriNetUnfolderBase]: For 11443/11443 co-relation queries the response was YES. [2024-11-28 05:04:12,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5144 conditions, 677 events. 368/677 cut-off events. For 11443/11443 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 2984 event pairs, 26 based on Foata normal form. 6/683 useless extension candidates. Maximal degree in co-relation 5060. Up to 223 conditions per place. [2024-11-28 05:04:12,128 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 102 selfloop transitions, 61 changer transitions 6/170 dead transitions. [2024-11-28 05:04:12,128 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 170 transitions, 2338 flow [2024-11-28 05:04:12,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-28 05:04:12,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-11-28 05:04:12,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 137 transitions. [2024-11-28 05:04:12,130 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.34595959595959597 [2024-11-28 05:04:12,130 INFO L175 Difference]: Start difference. First operand has 157 places, 124 transitions, 1410 flow. Second operand 18 states and 137 transitions. [2024-11-28 05:04:12,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 170 transitions, 2338 flow [2024-11-28 05:04:12,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 170 transitions, 2146 flow, removed 54 selfloop flow, removed 11 redundant places. [2024-11-28 05:04:12,162 INFO L231 Difference]: Finished difference. Result has 166 places, 126 transitions, 1491 flow [2024-11-28 05:04:12,162 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1298, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1491, PETRI_PLACES=166, PETRI_TRANSITIONS=126} [2024-11-28 05:04:12,163 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 144 predicate places. [2024-11-28 05:04:12,163 INFO L471 AbstractCegarLoop]: Abstraction has has 166 places, 126 transitions, 1491 flow [2024-11-28 05:04:12,163 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.15) internal successors, (103), 20 states have internal predecessors, (103), 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) [2024-11-28 05:04:12,163 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:04:12,163 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:04:12,174 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2024-11-28 05:04:12,364 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2024-11-28 05:04:12,364 INFO L396 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:04:12,364 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:04:12,364 INFO L85 PathProgramCache]: Analyzing trace with hash -151222489, now seen corresponding path program 33 times [2024-11-28 05:04:12,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:04:12,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013906485] [2024-11-28 05:04:12,364 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 05:04:12,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:04:12,382 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 05:04:12,382 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:04:12,817 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-28 05:04:12,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:04:12,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013906485] [2024-11-28 05:04:12,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013906485] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:04:12,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606523559] [2024-11-28 05:04:12,818 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 05:04:12,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:04:12,818 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:04:12,819 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:04:12,821 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2024-11-28 05:04:13,038 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 05:04:13,038 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:04:13,039 INFO L256 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-28 05:04:13,040 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:04:13,129 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:04:13,129 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 45 [2024-11-28 05:04:13,178 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:04:13,178 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:04:13,333 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-11-28 05:04:13,333 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2024-11-28 05:04:13,419 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:04:13,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606523559] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:04:13,419 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:04:13,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 20 [2024-11-28 05:04:13,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290803761] [2024-11-28 05:04:13,420 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:04:13,420 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-28 05:04:13,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:04:13,420 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-28 05:04:13,420 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2024-11-28 05:04:13,421 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 05:04:13,421 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 126 transitions, 1491 flow. Second operand has 20 states, 20 states have (on average 5.0) internal successors, (100), 20 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:04:13,421 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:04:13,421 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 05:04:13,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:04:14,008 INFO L124 PetriNetUnfolderBase]: 372/683 cut-off events. [2024-11-28 05:04:14,008 INFO L125 PetriNetUnfolderBase]: For 9533/9533 co-relation queries the response was YES. [2024-11-28 05:04:14,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5043 conditions, 683 events. 372/683 cut-off events. For 9533/9533 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 3019 event pairs, 125 based on Foata normal form. 4/687 useless extension candidates. Maximal degree in co-relation 4957. Up to 531 conditions per place. [2024-11-28 05:04:14,012 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 122 selfloop transitions, 28 changer transitions 5/156 dead transitions. [2024-11-28 05:04:14,012 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 156 transitions, 2059 flow [2024-11-28 05:04:14,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-28 05:04:14,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-28 05:04:14,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 96 transitions. [2024-11-28 05:04:14,013 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.36363636363636365 [2024-11-28 05:04:14,013 INFO L175 Difference]: Start difference. First operand has 166 places, 126 transitions, 1491 flow. Second operand 12 states and 96 transitions. [2024-11-28 05:04:14,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 156 transitions, 2059 flow [2024-11-28 05:04:14,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 156 transitions, 1858 flow, removed 27 selfloop flow, removed 18 redundant places. [2024-11-28 05:04:14,049 INFO L231 Difference]: Finished difference. Result has 161 places, 128 transitions, 1425 flow [2024-11-28 05:04:14,049 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1298, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1425, PETRI_PLACES=161, PETRI_TRANSITIONS=128} [2024-11-28 05:04:14,049 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 139 predicate places. [2024-11-28 05:04:14,049 INFO L471 AbstractCegarLoop]: Abstraction has has 161 places, 128 transitions, 1425 flow [2024-11-28 05:04:14,049 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.0) internal successors, (100), 20 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:04:14,049 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:04:14,050 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:04:14,066 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2024-11-28 05:04:14,250 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2024-11-28 05:04:14,250 INFO L396 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:04:14,250 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:04:14,251 INFO L85 PathProgramCache]: Analyzing trace with hash -2131107420, now seen corresponding path program 34 times [2024-11-28 05:04:14,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:04:14,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389662667] [2024-11-28 05:04:14,251 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 05:04:14,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:04:14,272 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 05:04:14,272 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:04:14,718 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-28 05:04:14,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:04:14,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389662667] [2024-11-28 05:04:14,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389662667] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:04:14,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471514787] [2024-11-28 05:04:14,719 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 05:04:14,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:04:14,719 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:04:14,720 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:04:14,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2024-11-28 05:04:14,946 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 05:04:14,946 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:04:14,947 INFO L256 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-28 05:04:14,948 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:04:15,031 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:04:15,031 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 34 [2024-11-28 05:04:15,081 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:04:15,081 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:04:15,232 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-11-28 05:04:15,232 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2024-11-28 05:04:15,332 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:04:15,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471514787] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:04:15,332 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:04:15,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 18 [2024-11-28 05:04:15,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765046543] [2024-11-28 05:04:15,332 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:04:15,332 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-28 05:04:15,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:04:15,333 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-28 05:04:15,333 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2024-11-28 05:04:15,333 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 05:04:15,333 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 128 transitions, 1425 flow. Second operand has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 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) [2024-11-28 05:04:15,333 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:04:15,333 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 05:04:15,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:04:15,771 INFO L124 PetriNetUnfolderBase]: 375/689 cut-off events. [2024-11-28 05:04:15,771 INFO L125 PetriNetUnfolderBase]: For 9034/9034 co-relation queries the response was YES. [2024-11-28 05:04:15,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4899 conditions, 689 events. 375/689 cut-off events. For 9034/9034 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 3040 event pairs, 130 based on Foata normal form. 4/693 useless extension candidates. Maximal degree in co-relation 4813. Up to 553 conditions per place. [2024-11-28 05:04:15,775 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 117 selfloop transitions, 27 changer transitions 0/145 dead transitions. [2024-11-28 05:04:15,775 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 145 transitions, 1859 flow [2024-11-28 05:04:15,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-28 05:04:15,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-28 05:04:15,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 72 transitions. [2024-11-28 05:04:15,776 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.36363636363636365 [2024-11-28 05:04:15,776 INFO L175 Difference]: Start difference. First operand has 161 places, 128 transitions, 1425 flow. Second operand 9 states and 72 transitions. [2024-11-28 05:04:15,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 145 transitions, 1859 flow [2024-11-28 05:04:15,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 145 transitions, 1730 flow, removed 30 selfloop flow, removed 10 redundant places. [2024-11-28 05:04:15,801 INFO L231 Difference]: Finished difference. Result has 159 places, 129 transitions, 1384 flow [2024-11-28 05:04:15,801 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1300, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1384, PETRI_PLACES=159, PETRI_TRANSITIONS=129} [2024-11-28 05:04:15,802 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 137 predicate places. [2024-11-28 05:04:15,802 INFO L471 AbstractCegarLoop]: Abstraction has has 159 places, 129 transitions, 1384 flow [2024-11-28 05:04:15,802 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 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) [2024-11-28 05:04:15,802 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:04:15,802 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:04:15,812 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2024-11-28 05:04:16,002 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2024-11-28 05:04:16,003 INFO L396 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:04:16,003 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:04:16,003 INFO L85 PathProgramCache]: Analyzing trace with hash 1905461988, now seen corresponding path program 35 times [2024-11-28 05:04:16,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:04:16,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969603782] [2024-11-28 05:04:16,003 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 05:04:16,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:04:16,044 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-11-28 05:04:16,044 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:04:16,637 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-28 05:04:16,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:04:16,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969603782] [2024-11-28 05:04:16,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969603782] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:04:16,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041154780] [2024-11-28 05:04:16,638 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 05:04:16,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:04:16,638 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:04:16,640 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:04:16,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2024-11-28 05:04:17,073 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-11-28 05:04:17,073 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:04:17,075 INFO L256 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-11-28 05:04:17,076 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:04:17,101 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 19 treesize of output 1 [2024-11-28 05:04:17,281 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:04:17,281 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 30 [2024-11-28 05:04:17,324 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-28 05:04:17,324 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:04:17,527 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:04:17,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041154780] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:04:17,528 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:04:17,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 7] total 21 [2024-11-28 05:04:17,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596308072] [2024-11-28 05:04:17,528 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:04:17,528 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-28 05:04:17,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:04:17,528 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-28 05:04:17,529 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2024-11-28 05:04:17,529 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 05:04:17,529 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 129 transitions, 1384 flow. Second operand has 21 states, 21 states have (on average 5.190476190476191) internal successors, (109), 21 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:04:17,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:04:17,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 05:04:17,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:04:18,236 INFO L124 PetriNetUnfolderBase]: 377/695 cut-off events. [2024-11-28 05:04:18,236 INFO L125 PetriNetUnfolderBase]: For 8027/8027 co-relation queries the response was YES. [2024-11-28 05:04:18,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4778 conditions, 695 events. 377/695 cut-off events. For 8027/8027 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 3078 event pairs, 117 based on Foata normal form. 4/699 useless extension candidates. Maximal degree in co-relation 4692. Up to 524 conditions per place. [2024-11-28 05:04:18,240 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 116 selfloop transitions, 39 changer transitions 3/159 dead transitions. [2024-11-28 05:04:18,240 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 159 transitions, 2039 flow [2024-11-28 05:04:18,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-28 05:04:18,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-28 05:04:18,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 104 transitions. [2024-11-28 05:04:18,241 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.33766233766233766 [2024-11-28 05:04:18,241 INFO L175 Difference]: Start difference. First operand has 159 places, 129 transitions, 1384 flow. Second operand 14 states and 104 transitions. [2024-11-28 05:04:18,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 159 transitions, 2039 flow [2024-11-28 05:04:18,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 159 transitions, 1974 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-11-28 05:04:18,271 INFO L231 Difference]: Finished difference. Result has 167 places, 132 transitions, 1464 flow [2024-11-28 05:04:18,271 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1319, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1464, PETRI_PLACES=167, PETRI_TRANSITIONS=132} [2024-11-28 05:04:18,271 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 145 predicate places. [2024-11-28 05:04:18,271 INFO L471 AbstractCegarLoop]: Abstraction has has 167 places, 132 transitions, 1464 flow [2024-11-28 05:04:18,272 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.190476190476191) internal successors, (109), 21 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:04:18,272 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:04:18,272 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:04:18,279 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2024-11-28 05:04:18,472 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2024-11-28 05:04:18,472 INFO L396 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:04:18,473 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:04:18,473 INFO L85 PathProgramCache]: Analyzing trace with hash -423555097, now seen corresponding path program 36 times [2024-11-28 05:04:18,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:04:18,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942125018] [2024-11-28 05:04:18,473 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 05:04:18,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:04:18,495 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-28 05:04:18,495 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:04:18,996 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-28 05:04:18,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:04:18,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942125018] [2024-11-28 05:04:18,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942125018] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:04:18,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046975075] [2024-11-28 05:04:18,996 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 05:04:18,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:04:18,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:04:19,000 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:04:19,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2024-11-28 05:04:19,230 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-28 05:04:19,230 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:04:19,231 INFO L256 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-28 05:04:19,232 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:04:19,368 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:04:19,369 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 45 [2024-11-28 05:04:19,427 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:04:19,427 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:04:19,652 INFO L349 Elim1Store]: treesize reduction 24, result has 65.2 percent of original size [2024-11-28 05:04:19,652 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 67 [2024-11-28 05:04:19,709 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:04:19,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046975075] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:04:19,709 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:04:19,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 20 [2024-11-28 05:04:19,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511096762] [2024-11-28 05:04:19,709 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:04:19,709 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-28 05:04:19,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:04:19,710 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-28 05:04:19,710 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2024-11-28 05:04:19,710 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 05:04:19,710 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 132 transitions, 1464 flow. Second operand has 20 states, 20 states have (on average 5.05) internal successors, (101), 20 states have internal predecessors, (101), 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) [2024-11-28 05:04:19,710 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:04:19,710 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 05:04:19,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:04:20,520 INFO L124 PetriNetUnfolderBase]: 389/728 cut-off events. [2024-11-28 05:04:20,520 INFO L125 PetriNetUnfolderBase]: For 9225/9225 co-relation queries the response was YES. [2024-11-28 05:04:20,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5098 conditions, 728 events. 389/728 cut-off events. For 9225/9225 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 3321 event pairs, 85 based on Foata normal form. 4/732 useless extension candidates. Maximal degree in co-relation 5010. Up to 371 conditions per place. [2024-11-28 05:04:20,526 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 104 selfloop transitions, 52 changer transitions 3/160 dead transitions. [2024-11-28 05:04:20,526 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 160 transitions, 2038 flow [2024-11-28 05:04:20,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-28 05:04:20,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-28 05:04:20,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 90 transitions. [2024-11-28 05:04:20,526 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.371900826446281 [2024-11-28 05:04:20,527 INFO L175 Difference]: Start difference. First operand has 167 places, 132 transitions, 1464 flow. Second operand 11 states and 90 transitions. [2024-11-28 05:04:20,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 160 transitions, 2038 flow [2024-11-28 05:04:20,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 160 transitions, 1944 flow, removed 12 selfloop flow, removed 10 redundant places. [2024-11-28 05:04:20,555 INFO L231 Difference]: Finished difference. Result has 170 places, 134 transitions, 1550 flow [2024-11-28 05:04:20,555 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1370, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1550, PETRI_PLACES=170, PETRI_TRANSITIONS=134} [2024-11-28 05:04:20,556 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 148 predicate places. [2024-11-28 05:04:20,556 INFO L471 AbstractCegarLoop]: Abstraction has has 170 places, 134 transitions, 1550 flow [2024-11-28 05:04:20,556 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.05) internal successors, (101), 20 states have internal predecessors, (101), 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) [2024-11-28 05:04:20,556 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:04:20,556 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:04:20,565 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2024-11-28 05:04:20,756 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:04:20,757 INFO L396 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:04:20,757 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:04:20,757 INFO L85 PathProgramCache]: Analyzing trace with hash 2082885005, now seen corresponding path program 37 times [2024-11-28 05:04:20,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:04:20,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917213222] [2024-11-28 05:04:20,757 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 05:04:20,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:04:20,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:04:21,210 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-28 05:04:21,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:04:21,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917213222] [2024-11-28 05:04:21,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917213222] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:04:21,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353613673] [2024-11-28 05:04:21,210 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 05:04:21,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:04:21,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:04:21,212 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:04:21,213 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2024-11-28 05:04:21,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:04:21,452 INFO L256 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-28 05:04:21,454 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:04:21,536 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:04:21,536 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 45 [2024-11-28 05:04:21,584 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:04:21,584 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:04:21,742 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-11-28 05:04:21,742 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2024-11-28 05:04:21,807 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:04:21,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353613673] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:04:21,807 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:04:21,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 19 [2024-11-28 05:04:21,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746269196] [2024-11-28 05:04:21,807 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:04:21,807 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-28 05:04:21,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:04:21,808 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-28 05:04:21,808 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2024-11-28 05:04:21,808 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 05:04:21,809 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 134 transitions, 1550 flow. Second operand has 19 states, 19 states have (on average 5.052631578947368) internal successors, (96), 19 states have internal predecessors, (96), 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) [2024-11-28 05:04:21,809 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:04:21,809 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 05:04:21,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:04:22,348 INFO L124 PetriNetUnfolderBase]: 388/739 cut-off events. [2024-11-28 05:04:22,348 INFO L125 PetriNetUnfolderBase]: For 9809/9809 co-relation queries the response was YES. [2024-11-28 05:04:22,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5228 conditions, 739 events. 388/739 cut-off events. For 9809/9809 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 3466 event pairs, 129 based on Foata normal form. 4/743 useless extension candidates. Maximal degree in co-relation 5137. Up to 574 conditions per place. [2024-11-28 05:04:22,353 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 122 selfloop transitions, 30 changer transitions 8/161 dead transitions. [2024-11-28 05:04:22,353 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 161 transitions, 2099 flow [2024-11-28 05:04:22,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-28 05:04:22,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-28 05:04:22,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 90 transitions. [2024-11-28 05:04:22,354 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.371900826446281 [2024-11-28 05:04:22,354 INFO L175 Difference]: Start difference. First operand has 170 places, 134 transitions, 1550 flow. Second operand 11 states and 90 transitions. [2024-11-28 05:04:22,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 161 transitions, 2099 flow [2024-11-28 05:04:22,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 161 transitions, 1983 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-11-28 05:04:22,387 INFO L231 Difference]: Finished difference. Result has 174 places, 134 transitions, 1497 flow [2024-11-28 05:04:22,387 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1434, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1497, PETRI_PLACES=174, PETRI_TRANSITIONS=134} [2024-11-28 05:04:22,387 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 152 predicate places. [2024-11-28 05:04:22,387 INFO L471 AbstractCegarLoop]: Abstraction has has 174 places, 134 transitions, 1497 flow [2024-11-28 05:04:22,388 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.052631578947368) internal successors, (96), 19 states have internal predecessors, (96), 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) [2024-11-28 05:04:22,388 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:04:22,388 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:04:22,395 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2024-11-28 05:04:22,588 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2024-11-28 05:04:22,588 INFO L396 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:04:22,589 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:04:22,589 INFO L85 PathProgramCache]: Analyzing trace with hash 1290166895, now seen corresponding path program 38 times [2024-11-28 05:04:22,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:04:22,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818035783] [2024-11-28 05:04:22,589 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:04:22,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:04:22,609 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:04:22,609 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:04:23,135 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-28 05:04:23,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:04:23,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818035783] [2024-11-28 05:04:23,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818035783] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:04:23,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014154845] [2024-11-28 05:04:23,136 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:04:23,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:04:23,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:04:23,137 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:04:23,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2024-11-28 05:04:23,384 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:04:23,385 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:04:23,386 INFO L256 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-28 05:04:23,387 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:04:23,480 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:04:23,480 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 34 [2024-11-28 05:04:23,570 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:04:23,570 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:04:23,753 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-11-28 05:04:23,754 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2024-11-28 05:04:23,876 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:04:23,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2014154845] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:04:23,876 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:04:23,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 20 [2024-11-28 05:04:23,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975893214] [2024-11-28 05:04:23,876 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:04:23,876 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-28 05:04:23,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:04:23,877 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-28 05:04:23,877 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2024-11-28 05:04:23,877 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 05:04:23,877 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 134 transitions, 1497 flow. Second operand has 20 states, 20 states have (on average 5.25) internal successors, (105), 20 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:04:23,877 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:04:23,877 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 05:04:23,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:04:24,516 INFO L124 PetriNetUnfolderBase]: 396/749 cut-off events. [2024-11-28 05:04:24,516 INFO L125 PetriNetUnfolderBase]: For 8326/8326 co-relation queries the response was YES. [2024-11-28 05:04:24,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5087 conditions, 749 events. 396/749 cut-off events. For 8326/8326 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 3492 event pairs, 135 based on Foata normal form. 10/759 useless extension candidates. Maximal degree in co-relation 4995. Up to 596 conditions per place. [2024-11-28 05:04:24,522 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 134 selfloop transitions, 31 changer transitions 1/167 dead transitions. [2024-11-28 05:04:24,522 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 167 transitions, 2082 flow [2024-11-28 05:04:24,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-28 05:04:24,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-28 05:04:24,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 104 transitions. [2024-11-28 05:04:24,523 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.36363636363636365 [2024-11-28 05:04:24,523 INFO L175 Difference]: Start difference. First operand has 174 places, 134 transitions, 1497 flow. Second operand 13 states and 104 transitions. [2024-11-28 05:04:24,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 167 transitions, 2082 flow [2024-11-28 05:04:24,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 167 transitions, 1904 flow, removed 32 selfloop flow, removed 18 redundant places. [2024-11-28 05:04:24,553 INFO L231 Difference]: Finished difference. Result has 168 places, 137 transitions, 1425 flow [2024-11-28 05:04:24,553 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1321, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1425, PETRI_PLACES=168, PETRI_TRANSITIONS=137} [2024-11-28 05:04:24,554 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 146 predicate places. [2024-11-28 05:04:24,554 INFO L471 AbstractCegarLoop]: Abstraction has has 168 places, 137 transitions, 1425 flow [2024-11-28 05:04:24,554 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.25) internal successors, (105), 20 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:04:24,554 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:04:24,554 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:04:24,565 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2024-11-28 05:04:24,754 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:04:24,755 INFO L396 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:04:24,755 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:04:24,755 INFO L85 PathProgramCache]: Analyzing trace with hash 1887825275, now seen corresponding path program 39 times [2024-11-28 05:04:24,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:04:24,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940702259] [2024-11-28 05:04:24,755 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 05:04:24,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:04:24,780 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 05:04:24,780 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:04:25,262 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-28 05:04:25,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:04:25,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940702259] [2024-11-28 05:04:25,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940702259] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:04:25,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771196051] [2024-11-28 05:04:25,263 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 05:04:25,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:04:25,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:04:25,267 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:04:25,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2024-11-28 05:04:25,503 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 05:04:25,503 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:04:25,504 INFO L256 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-28 05:04:25,506 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:04:25,659 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:04:25,659 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:04:25,825 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-11-28 05:04:25,825 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2024-11-28 05:04:25,968 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:04:25,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771196051] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:04:25,969 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:04:25,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 20 [2024-11-28 05:04:25,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282980961] [2024-11-28 05:04:25,969 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:04:25,969 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-28 05:04:25,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:04:25,970 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-28 05:04:25,970 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2024-11-28 05:04:25,970 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 05:04:25,971 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 137 transitions, 1425 flow. Second operand has 20 states, 20 states have (on average 5.05) internal successors, (101), 20 states have internal predecessors, (101), 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) [2024-11-28 05:04:25,971 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:04:25,971 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 05:04:25,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:04:26,500 INFO L124 PetriNetUnfolderBase]: 392/737 cut-off events. [2024-11-28 05:04:26,500 INFO L125 PetriNetUnfolderBase]: For 7481/7481 co-relation queries the response was YES. [2024-11-28 05:04:26,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4811 conditions, 737 events. 392/737 cut-off events. For 7481/7481 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 3414 event pairs, 132 based on Foata normal form. 2/739 useless extension candidates. Maximal degree in co-relation 4730. Up to 595 conditions per place. [2024-11-28 05:04:26,505 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 121 selfloop transitions, 28 changer transitions 8/158 dead transitions. [2024-11-28 05:04:26,505 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 158 transitions, 1889 flow [2024-11-28 05:04:26,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-28 05:04:26,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-28 05:04:26,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 82 transitions. [2024-11-28 05:04:26,506 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.33884297520661155 [2024-11-28 05:04:26,506 INFO L175 Difference]: Start difference. First operand has 168 places, 137 transitions, 1425 flow. Second operand 11 states and 82 transitions. [2024-11-28 05:04:26,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 158 transitions, 1889 flow [2024-11-28 05:04:26,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 158 transitions, 1812 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-11-28 05:04:26,527 INFO L231 Difference]: Finished difference. Result has 170 places, 135 transitions, 1385 flow [2024-11-28 05:04:26,527 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1348, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1385, PETRI_PLACES=170, PETRI_TRANSITIONS=135} [2024-11-28 05:04:26,528 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 148 predicate places. [2024-11-28 05:04:26,528 INFO L471 AbstractCegarLoop]: Abstraction has has 170 places, 135 transitions, 1385 flow [2024-11-28 05:04:26,528 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.05) internal successors, (101), 20 states have internal predecessors, (101), 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) [2024-11-28 05:04:26,528 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:04:26,528 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:04:26,535 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2024-11-28 05:04:26,728 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2024-11-28 05:04:26,728 INFO L396 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:04:26,729 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:04:26,729 INFO L85 PathProgramCache]: Analyzing trace with hash -999242677, now seen corresponding path program 40 times [2024-11-28 05:04:26,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:04:26,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538027684] [2024-11-28 05:04:26,729 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 05:04:26,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:04:26,751 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 05:04:26,751 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:04:27,112 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-28 05:04:27,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:04:27,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538027684] [2024-11-28 05:04:27,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538027684] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:04:27,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550083454] [2024-11-28 05:04:27,112 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 05:04:27,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:04:27,113 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:04:27,114 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:04:27,116 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2024-11-28 05:04:27,360 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 05:04:27,360 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:04:27,362 INFO L256 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-28 05:04:27,363 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:04:27,461 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:04:27,461 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:04:27,603 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-11-28 05:04:27,603 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2024-11-28 05:04:27,647 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:04:27,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550083454] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:04:27,648 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:04:27,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 19 [2024-11-28 05:04:27,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667415112] [2024-11-28 05:04:27,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:04:27,648 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-28 05:04:27,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:04:27,648 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-28 05:04:27,649 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2024-11-28 05:04:27,649 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 05:04:27,649 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 135 transitions, 1385 flow. Second operand has 19 states, 19 states have (on average 5.315789473684211) internal successors, (101), 19 states have internal predecessors, (101), 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) [2024-11-28 05:04:27,649 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:04:27,649 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 05:04:27,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:04:28,021 INFO L124 PetriNetUnfolderBase]: 384/713 cut-off events. [2024-11-28 05:04:28,021 INFO L125 PetriNetUnfolderBase]: For 7207/7207 co-relation queries the response was YES. [2024-11-28 05:04:28,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4669 conditions, 713 events. 384/713 cut-off events. For 7207/7207 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 3218 event pairs, 134 based on Foata normal form. 5/718 useless extension candidates. Maximal degree in co-relation 4587. Up to 595 conditions per place. [2024-11-28 05:04:28,025 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 123 selfloop transitions, 25 changer transitions 1/150 dead transitions. [2024-11-28 05:04:28,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 150 transitions, 1819 flow [2024-11-28 05:04:28,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-28 05:04:28,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-28 05:04:28,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 70 transitions. [2024-11-28 05:04:28,026 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.35353535353535354 [2024-11-28 05:04:28,026 INFO L175 Difference]: Start difference. First operand has 170 places, 135 transitions, 1385 flow. Second operand 9 states and 70 transitions. [2024-11-28 05:04:28,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 150 transitions, 1819 flow [2024-11-28 05:04:28,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 150 transitions, 1737 flow, removed 6 selfloop flow, removed 13 redundant places. [2024-11-28 05:04:28,047 INFO L231 Difference]: Finished difference. Result has 161 places, 134 transitions, 1349 flow [2024-11-28 05:04:28,047 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1299, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1349, PETRI_PLACES=161, PETRI_TRANSITIONS=134} [2024-11-28 05:04:28,048 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 139 predicate places. [2024-11-28 05:04:28,048 INFO L471 AbstractCegarLoop]: Abstraction has has 161 places, 134 transitions, 1349 flow [2024-11-28 05:04:28,048 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.315789473684211) internal successors, (101), 19 states have internal predecessors, (101), 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) [2024-11-28 05:04:28,048 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:04:28,048 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:04:28,055 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2024-11-28 05:04:28,248 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2024-11-28 05:04:28,248 INFO L396 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:04:28,249 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:04:28,249 INFO L85 PathProgramCache]: Analyzing trace with hash 357265839, now seen corresponding path program 41 times [2024-11-28 05:04:28,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:04:28,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967657333] [2024-11-28 05:04:28,249 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 05:04:28,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:04:28,281 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-11-28 05:04:28,281 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:04:29,221 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-28 05:04:29,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:04:29,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967657333] [2024-11-28 05:04:29,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967657333] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:04:29,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86995725] [2024-11-28 05:04:29,221 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 05:04:29,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:04:29,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:04:29,224 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:04:29,225 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2024-11-28 05:04:29,614 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-11-28 05:04:29,614 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:04:29,616 INFO L256 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-11-28 05:04:29,618 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:04:29,734 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 19 treesize of output 1 [2024-11-28 05:04:29,761 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 19 treesize of output 1 [2024-11-28 05:04:29,924 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:04:29,924 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 41 [2024-11-28 05:04:29,988 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-28 05:04:29,988 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:04:30,216 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:04:30,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86995725] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:04:30,217 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:04:30,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 7] total 31 [2024-11-28 05:04:30,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245457409] [2024-11-28 05:04:30,217 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:04:30,217 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-28 05:04:30,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:04:30,218 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-28 05:04:30,218 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=809, Unknown=0, NotChecked=0, Total=930 [2024-11-28 05:04:30,218 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 05:04:30,218 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 134 transitions, 1349 flow. Second operand has 31 states, 31 states have (on average 4.838709677419355) internal successors, (150), 31 states have internal predecessors, (150), 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) [2024-11-28 05:04:30,218 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:04:30,218 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 05:04:30,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:04:30,912 INFO L124 PetriNetUnfolderBase]: 379/700 cut-off events. [2024-11-28 05:04:30,912 INFO L125 PetriNetUnfolderBase]: For 6874/6874 co-relation queries the response was YES. [2024-11-28 05:04:30,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4541 conditions, 700 events. 379/700 cut-off events. For 6874/6874 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 3114 event pairs, 77 based on Foata normal form. 5/705 useless extension candidates. Maximal degree in co-relation 4463. Up to 381 conditions per place. [2024-11-28 05:04:30,916 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 83 selfloop transitions, 67 changer transitions 1/152 dead transitions. [2024-11-28 05:04:30,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 152 transitions, 1786 flow [2024-11-28 05:04:30,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-28 05:04:30,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-28 05:04:30,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 95 transitions. [2024-11-28 05:04:30,917 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3321678321678322 [2024-11-28 05:04:30,917 INFO L175 Difference]: Start difference. First operand has 161 places, 134 transitions, 1349 flow. Second operand 13 states and 95 transitions. [2024-11-28 05:04:30,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 152 transitions, 1786 flow [2024-11-28 05:04:30,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 152 transitions, 1728 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-11-28 05:04:30,937 INFO L231 Difference]: Finished difference. Result has 163 places, 133 transitions, 1419 flow [2024-11-28 05:04:30,937 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1285, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1419, PETRI_PLACES=163, PETRI_TRANSITIONS=133} [2024-11-28 05:04:30,937 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 141 predicate places. [2024-11-28 05:04:30,938 INFO L471 AbstractCegarLoop]: Abstraction has has 163 places, 133 transitions, 1419 flow [2024-11-28 05:04:30,938 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 4.838709677419355) internal successors, (150), 31 states have internal predecessors, (150), 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) [2024-11-28 05:04:30,938 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:04:30,938 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:04:30,946 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2024-11-28 05:04:31,138 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2024-11-28 05:04:31,138 INFO L396 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:04:31,139 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:04:31,139 INFO L85 PathProgramCache]: Analyzing trace with hash 678048224, now seen corresponding path program 42 times [2024-11-28 05:04:31,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:04:31,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595730930] [2024-11-28 05:04:31,139 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 05:04:31,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:04:31,158 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-28 05:04:31,158 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:04:31,550 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-28 05:04:31,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:04:31,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595730930] [2024-11-28 05:04:31,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595730930] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:04:31,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26436142] [2024-11-28 05:04:31,550 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 05:04:31,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:04:31,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:04:31,552 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:04:31,553 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2024-11-28 05:04:31,802 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-28 05:04:31,802 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:04:31,803 INFO L256 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-28 05:04:31,804 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:04:31,933 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:04:31,933 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 34 [2024-11-28 05:04:32,025 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:04:32,025 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:04:32,249 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-11-28 05:04:32,250 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2024-11-28 05:04:32,282 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:04:32,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26436142] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:04:32,282 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:04:32,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 20 [2024-11-28 05:04:32,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572877865] [2024-11-28 05:04:32,282 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:04:32,282 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-28 05:04:32,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:04:32,283 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-28 05:04:32,283 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2024-11-28 05:04:32,283 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 05:04:32,283 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 133 transitions, 1419 flow. Second operand has 20 states, 20 states have (on average 5.15) internal successors, (103), 20 states have internal predecessors, (103), 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) [2024-11-28 05:04:32,283 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:04:32,283 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 05:04:32,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:04:33,411 INFO L124 PetriNetUnfolderBase]: 397/730 cut-off events. [2024-11-28 05:04:33,411 INFO L125 PetriNetUnfolderBase]: For 6875/6875 co-relation queries the response was YES. [2024-11-28 05:04:33,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4863 conditions, 730 events. 397/730 cut-off events. For 6875/6875 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 3280 event pairs, 18 based on Foata normal form. 8/738 useless extension candidates. Maximal degree in co-relation 4786. Up to 283 conditions per place. [2024-11-28 05:04:33,418 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 105 selfloop transitions, 68 changer transitions 1/175 dead transitions. [2024-11-28 05:04:33,418 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 175 transitions, 2177 flow [2024-11-28 05:04:33,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-28 05:04:33,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-11-28 05:04:33,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 134 transitions. [2024-11-28 05:04:33,419 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3383838383838384 [2024-11-28 05:04:33,419 INFO L175 Difference]: Start difference. First operand has 163 places, 133 transitions, 1419 flow. Second operand 18 states and 134 transitions. [2024-11-28 05:04:33,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 175 transitions, 2177 flow [2024-11-28 05:04:33,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 175 transitions, 2043 flow, removed 0 selfloop flow, removed 12 redundant places. [2024-11-28 05:04:33,440 INFO L231 Difference]: Finished difference. Result has 169 places, 137 transitions, 1491 flow [2024-11-28 05:04:33,441 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1285, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1491, PETRI_PLACES=169, PETRI_TRANSITIONS=137} [2024-11-28 05:04:33,441 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 147 predicate places. [2024-11-28 05:04:33,441 INFO L471 AbstractCegarLoop]: Abstraction has has 169 places, 137 transitions, 1491 flow [2024-11-28 05:04:33,441 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.15) internal successors, (103), 20 states have internal predecessors, (103), 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) [2024-11-28 05:04:33,441 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:04:33,442 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:04:33,453 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2024-11-28 05:04:33,642 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2024-11-28 05:04:33,642 INFO L396 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:04:33,643 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:04:33,643 INFO L85 PathProgramCache]: Analyzing trace with hash 870177954, now seen corresponding path program 43 times [2024-11-28 05:04:33,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:04:33,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004689376] [2024-11-28 05:04:33,643 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 05:04:33,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:04:33,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:04:34,125 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-28 05:04:34,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:04:34,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004689376] [2024-11-28 05:04:34,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004689376] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:04:34,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039036997] [2024-11-28 05:04:34,125 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 05:04:34,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:04:34,125 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:04:34,127 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:04:34,129 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2024-11-28 05:04:34,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:04:34,386 INFO L256 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-28 05:04:34,387 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:04:34,485 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-11-28 05:04:34,485 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2024-11-28 05:04:34,488 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:04:34,488 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:04:34,641 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-11-28 05:04:34,642 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2024-11-28 05:04:34,654 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:04:34,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039036997] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:04:34,654 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:04:34,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 18 [2024-11-28 05:04:34,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345257171] [2024-11-28 05:04:34,654 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:04:34,654 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-28 05:04:34,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:04:34,655 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-28 05:04:34,655 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2024-11-28 05:04:34,655 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 05:04:34,655 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 137 transitions, 1491 flow. Second operand has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:04:34,655 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:04:34,655 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 05:04:34,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:04:35,156 INFO L124 PetriNetUnfolderBase]: 410/746 cut-off events. [2024-11-28 05:04:35,156 INFO L125 PetriNetUnfolderBase]: For 7307/7307 co-relation queries the response was YES. [2024-11-28 05:04:35,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5141 conditions, 746 events. 410/746 cut-off events. For 7307/7307 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 3355 event pairs, 22 based on Foata normal form. 4/750 useless extension candidates. Maximal degree in co-relation 5063. Up to 323 conditions per place. [2024-11-28 05:04:35,161 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 102 selfloop transitions, 61 changer transitions 1/165 dead transitions. [2024-11-28 05:04:35,161 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 165 transitions, 2134 flow [2024-11-28 05:04:35,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-28 05:04:35,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-28 05:04:35,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 92 transitions. [2024-11-28 05:04:35,162 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3484848484848485 [2024-11-28 05:04:35,162 INFO L175 Difference]: Start difference. First operand has 169 places, 137 transitions, 1491 flow. Second operand 12 states and 92 transitions. [2024-11-28 05:04:35,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 165 transitions, 2134 flow [2024-11-28 05:04:35,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 165 transitions, 1973 flow, removed 18 selfloop flow, removed 14 redundant places. [2024-11-28 05:04:35,190 INFO L231 Difference]: Finished difference. Result has 166 places, 140 transitions, 1535 flow [2024-11-28 05:04:35,190 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1332, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1535, PETRI_PLACES=166, PETRI_TRANSITIONS=140} [2024-11-28 05:04:35,191 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 144 predicate places. [2024-11-28 05:04:35,191 INFO L471 AbstractCegarLoop]: Abstraction has has 166 places, 140 transitions, 1535 flow [2024-11-28 05:04:35,191 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:04:35,191 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:04:35,191 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:04:35,198 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2024-11-28 05:04:35,391 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:04:35,391 INFO L396 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:04:35,392 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:04:35,392 INFO L85 PathProgramCache]: Analyzing trace with hash -937026435, now seen corresponding path program 44 times [2024-11-28 05:04:35,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:04:35,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085956471] [2024-11-28 05:04:35,392 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:04:35,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:04:35,411 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:04:35,412 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:04:35,941 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-28 05:04:35,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:04:35,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085956471] [2024-11-28 05:04:35,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085956471] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:04:35,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640569668] [2024-11-28 05:04:35,942 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:04:35,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:04:35,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:04:35,945 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:04:35,946 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2024-11-28 05:04:36,205 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:04:36,205 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:04:36,206 INFO L256 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-28 05:04:36,207 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:04:36,378 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:04:36,378 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:04:36,582 INFO L349 Elim1Store]: treesize reduction 24, result has 65.2 percent of original size [2024-11-28 05:04:36,582 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 67 [2024-11-28 05:04:36,628 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:04:36,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640569668] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:04:36,628 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:04:36,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 20 [2024-11-28 05:04:36,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634142107] [2024-11-28 05:04:36,628 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:04:36,628 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-28 05:04:36,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:04:36,629 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-28 05:04:36,629 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2024-11-28 05:04:36,629 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 05:04:36,629 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 140 transitions, 1535 flow. Second operand has 20 states, 20 states have (on average 5.0) internal successors, (100), 20 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:04:36,629 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:04:36,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 05:04:36,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:04:37,366 INFO L124 PetriNetUnfolderBase]: 406/734 cut-off events. [2024-11-28 05:04:37,366 INFO L125 PetriNetUnfolderBase]: For 7638/7638 co-relation queries the response was YES. [2024-11-28 05:04:37,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5061 conditions, 734 events. 406/734 cut-off events. For 7638/7638 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 3265 event pairs, 88 based on Foata normal form. 2/736 useless extension candidates. Maximal degree in co-relation 4982. Up to 428 conditions per place. [2024-11-28 05:04:37,370 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 101 selfloop transitions, 50 changer transitions 5/157 dead transitions. [2024-11-28 05:04:37,370 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 157 transitions, 1976 flow [2024-11-28 05:04:37,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-28 05:04:37,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-28 05:04:37,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 76 transitions. [2024-11-28 05:04:37,371 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.34545454545454546 [2024-11-28 05:04:37,371 INFO L175 Difference]: Start difference. First operand has 166 places, 140 transitions, 1535 flow. Second operand 10 states and 76 transitions. [2024-11-28 05:04:37,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 157 transitions, 1976 flow [2024-11-28 05:04:37,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 157 transitions, 1844 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-11-28 05:04:37,391 INFO L231 Difference]: Finished difference. Result has 166 places, 137 transitions, 1477 flow [2024-11-28 05:04:37,392 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1394, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1477, PETRI_PLACES=166, PETRI_TRANSITIONS=137} [2024-11-28 05:04:37,392 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 144 predicate places. [2024-11-28 05:04:37,392 INFO L471 AbstractCegarLoop]: Abstraction has has 166 places, 137 transitions, 1477 flow [2024-11-28 05:04:37,392 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.0) internal successors, (100), 20 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:04:37,392 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:04:37,392 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:04:37,399 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2024-11-28 05:04:37,592 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:04:37,593 INFO L396 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:04:37,593 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:04:37,593 INFO L85 PathProgramCache]: Analyzing trace with hash -179067836, now seen corresponding path program 45 times [2024-11-28 05:04:37,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:04:37,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075686279] [2024-11-28 05:04:37,593 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 05:04:37,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:04:37,611 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 05:04:37,611 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:04:37,992 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-28 05:04:37,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:04:37,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075686279] [2024-11-28 05:04:37,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075686279] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:04:37,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808001172] [2024-11-28 05:04:37,993 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 05:04:37,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:04:37,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:04:37,995 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:04:37,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2024-11-28 05:04:38,307 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 05:04:38,307 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:04:38,308 INFO L256 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-28 05:04:38,309 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:04:38,451 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:04:38,451 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:04:38,626 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-11-28 05:04:38,627 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2024-11-28 05:04:38,737 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:04:38,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808001172] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:04:38,738 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:04:38,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 8] total 21 [2024-11-28 05:04:38,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594573374] [2024-11-28 05:04:38,738 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:04:38,738 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-28 05:04:38,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:04:38,738 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-28 05:04:38,739 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2024-11-28 05:04:38,739 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 05:04:38,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 137 transitions, 1477 flow. Second operand has 21 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 21 states have internal predecessors, (104), 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) [2024-11-28 05:04:38,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:04:38,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 05:04:38,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:04:39,258 INFO L124 PetriNetUnfolderBase]: 401/725 cut-off events. [2024-11-28 05:04:39,258 INFO L125 PetriNetUnfolderBase]: For 7543/7543 co-relation queries the response was YES. [2024-11-28 05:04:39,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4958 conditions, 725 events. 401/725 cut-off events. For 7543/7543 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 3231 event pairs, 138 based on Foata normal form. 3/728 useless extension candidates. Maximal degree in co-relation 4879. Up to 621 conditions per place. [2024-11-28 05:04:39,263 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 117 selfloop transitions, 25 changer transitions 7/150 dead transitions. [2024-11-28 05:04:39,263 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 150 transitions, 1867 flow [2024-11-28 05:04:39,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-28 05:04:39,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-28 05:04:39,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 70 transitions. [2024-11-28 05:04:39,264 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3181818181818182 [2024-11-28 05:04:39,264 INFO L175 Difference]: Start difference. First operand has 166 places, 137 transitions, 1477 flow. Second operand 10 states and 70 transitions. [2024-11-28 05:04:39,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 150 transitions, 1867 flow [2024-11-28 05:04:39,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 150 transitions, 1765 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-11-28 05:04:39,294 INFO L231 Difference]: Finished difference. Result has 165 places, 136 transitions, 1395 flow [2024-11-28 05:04:39,294 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1377, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1395, PETRI_PLACES=165, PETRI_TRANSITIONS=136} [2024-11-28 05:04:39,295 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 143 predicate places. [2024-11-28 05:04:39,295 INFO L471 AbstractCegarLoop]: Abstraction has has 165 places, 136 transitions, 1395 flow [2024-11-28 05:04:39,295 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 21 states have internal predecessors, (104), 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) [2024-11-28 05:04:39,295 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:04:39,295 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:04:39,301 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2024-11-28 05:04:39,495 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:04:39,495 INFO L396 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:04:39,496 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:04:39,496 INFO L85 PathProgramCache]: Analyzing trace with hash 1828022473, now seen corresponding path program 46 times [2024-11-28 05:04:39,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:04:39,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247986737] [2024-11-28 05:04:39,496 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 05:04:39,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:04:39,530 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 05:04:39,530 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:04:39,963 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-28 05:04:39,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:04:39,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247986737] [2024-11-28 05:04:39,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247986737] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:04:39,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352594821] [2024-11-28 05:04:39,963 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 05:04:39,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:04:39,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:04:39,965 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:04:39,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2024-11-28 05:04:40,233 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 05:04:40,233 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:04:40,235 INFO L256 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-28 05:04:40,235 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:04:40,304 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:04:40,304 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 45 [2024-11-28 05:04:40,360 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:04:40,360 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:04:40,518 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-11-28 05:04:40,518 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2024-11-28 05:04:40,572 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:04:40,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352594821] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:04:40,572 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:04:40,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 19 [2024-11-28 05:04:40,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639579222] [2024-11-28 05:04:40,573 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:04:40,573 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-28 05:04:40,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:04:40,573 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-28 05:04:40,573 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2024-11-28 05:04:40,573 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 05:04:40,574 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 136 transitions, 1395 flow. Second operand has 19 states, 19 states have (on average 5.315789473684211) internal successors, (101), 19 states have internal predecessors, (101), 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) [2024-11-28 05:04:40,574 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:04:40,574 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 05:04:40,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:04:40,958 INFO L124 PetriNetUnfolderBase]: 390/695 cut-off events. [2024-11-28 05:04:40,959 INFO L125 PetriNetUnfolderBase]: For 6499/6499 co-relation queries the response was YES. [2024-11-28 05:04:40,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4642 conditions, 695 events. 390/695 cut-off events. For 6499/6499 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 3000 event pairs, 125 based on Foata normal form. 5/700 useless extension candidates. Maximal degree in co-relation 4562. Up to 585 conditions per place. [2024-11-28 05:04:40,964 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 118 selfloop transitions, 28 changer transitions 0/147 dead transitions. [2024-11-28 05:04:40,964 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 147 transitions, 1745 flow [2024-11-28 05:04:40,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-28 05:04:40,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-28 05:04:40,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 68 transitions. [2024-11-28 05:04:40,965 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3434343434343434 [2024-11-28 05:04:40,965 INFO L175 Difference]: Start difference. First operand has 165 places, 136 transitions, 1395 flow. Second operand 9 states and 68 transitions. [2024-11-28 05:04:40,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 147 transitions, 1745 flow [2024-11-28 05:04:40,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 147 transitions, 1613 flow, removed 11 selfloop flow, removed 17 redundant places. [2024-11-28 05:04:40,983 INFO L231 Difference]: Finished difference. Result has 151 places, 135 transitions, 1314 flow [2024-11-28 05:04:40,984 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1258, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1314, PETRI_PLACES=151, PETRI_TRANSITIONS=135} [2024-11-28 05:04:40,984 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 129 predicate places. [2024-11-28 05:04:40,984 INFO L471 AbstractCegarLoop]: Abstraction has has 151 places, 135 transitions, 1314 flow [2024-11-28 05:04:40,984 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.315789473684211) internal successors, (101), 19 states have internal predecessors, (101), 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) [2024-11-28 05:04:40,984 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:04:40,985 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:04:40,997 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2024-11-28 05:04:41,185 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:04:41,185 INFO L396 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:04:41,186 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:04:41,186 INFO L85 PathProgramCache]: Analyzing trace with hash 1848192738, now seen corresponding path program 47 times [2024-11-28 05:04:41,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:04:41,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756551995] [2024-11-28 05:04:41,186 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 05:04:41,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:04:41,229 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-11-28 05:04:41,229 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:04:41,667 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-28 05:04:41,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:04:41,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756551995] [2024-11-28 05:04:41,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756551995] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:04:41,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838243976] [2024-11-28 05:04:41,668 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 05:04:41,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:04:41,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:04:41,669 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:04:41,671 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2024-11-28 05:04:41,995 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-11-28 05:04:41,996 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:04:41,998 INFO L256 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-28 05:04:41,999 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:04:42,181 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:04:42,181 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 41 [2024-11-28 05:04:42,232 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-28 05:04:42,232 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:04:42,391 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-11-28 05:04:42,392 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2024-11-28 05:04:42,459 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:04:42,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838243976] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:04:42,459 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:04:42,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 7] total 23 [2024-11-28 05:04:42,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451261508] [2024-11-28 05:04:42,460 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:04:42,460 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-28 05:04:42,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:04:42,460 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-28 05:04:42,461 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2024-11-28 05:04:42,461 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 05:04:42,461 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 135 transitions, 1314 flow. Second operand has 23 states, 23 states have (on average 5.043478260869565) internal successors, (116), 23 states have internal predecessors, (116), 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) [2024-11-28 05:04:42,461 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:04:42,461 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 05:04:42,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:04:42,976 INFO L124 PetriNetUnfolderBase]: 383/679 cut-off events. [2024-11-28 05:04:42,976 INFO L125 PetriNetUnfolderBase]: For 5390/5390 co-relation queries the response was YES. [2024-11-28 05:04:42,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4370 conditions, 679 events. 383/679 cut-off events. For 5390/5390 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 2905 event pairs, 114 based on Foata normal form. 3/682 useless extension candidates. Maximal degree in co-relation 4299. Up to 547 conditions per place. [2024-11-28 05:04:42,983 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 110 selfloop transitions, 35 changer transitions 3/149 dead transitions. [2024-11-28 05:04:42,983 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 149 transitions, 1722 flow [2024-11-28 05:04:42,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-28 05:04:42,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-28 05:04:42,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 83 transitions. [2024-11-28 05:04:42,984 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3143939393939394 [2024-11-28 05:04:42,984 INFO L175 Difference]: Start difference. First operand has 151 places, 135 transitions, 1314 flow. Second operand 12 states and 83 transitions. [2024-11-28 05:04:42,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 149 transitions, 1722 flow [2024-11-28 05:04:43,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 149 transitions, 1668 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-11-28 05:04:43,006 INFO L231 Difference]: Finished difference. Result has 153 places, 133 transitions, 1312 flow [2024-11-28 05:04:43,006 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1250, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1312, PETRI_PLACES=153, PETRI_TRANSITIONS=133} [2024-11-28 05:04:43,006 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 131 predicate places. [2024-11-28 05:04:43,007 INFO L471 AbstractCegarLoop]: Abstraction has has 153 places, 133 transitions, 1312 flow [2024-11-28 05:04:43,007 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.043478260869565) internal successors, (116), 23 states have internal predecessors, (116), 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) [2024-11-28 05:04:43,007 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:04:43,007 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:04:43,019 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2024-11-28 05:04:43,207 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2024-11-28 05:04:43,208 INFO L396 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:04:43,208 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:04:43,208 INFO L85 PathProgramCache]: Analyzing trace with hash -1893804638, now seen corresponding path program 48 times [2024-11-28 05:04:43,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:04:43,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094019760] [2024-11-28 05:04:43,208 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 05:04:43,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:04:43,227 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-28 05:04:43,227 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:04:43,675 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-28 05:04:43,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:04:43,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094019760] [2024-11-28 05:04:43,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094019760] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:04:43,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258905534] [2024-11-28 05:04:43,675 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 05:04:43,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:04:43,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:04:43,677 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:04:43,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2024-11-28 05:04:43,950 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-28 05:04:43,950 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:04:43,952 INFO L256 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-28 05:04:43,953 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:04:44,049 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:04:44,049 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 45 [2024-11-28 05:04:44,119 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:04:44,119 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:04:44,293 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-11-28 05:04:44,293 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2024-11-28 05:04:44,423 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:04:44,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258905534] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:04:44,423 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:04:44,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 20 [2024-11-28 05:04:44,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415463462] [2024-11-28 05:04:44,423 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:04:44,424 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-28 05:04:44,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:04:44,424 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-28 05:04:44,424 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2024-11-28 05:04:44,424 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 05:04:44,424 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 133 transitions, 1312 flow. Second operand has 20 states, 20 states have (on average 5.15) internal successors, (103), 20 states have internal predecessors, (103), 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) [2024-11-28 05:04:44,425 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:04:44,425 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 05:04:44,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:04:44,914 INFO L124 PetriNetUnfolderBase]: 375/659 cut-off events. [2024-11-28 05:04:44,914 INFO L125 PetriNetUnfolderBase]: For 5235/5235 co-relation queries the response was YES. [2024-11-28 05:04:44,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4273 conditions, 659 events. 375/659 cut-off events. For 5235/5235 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 2779 event pairs, 113 based on Foata normal form. 3/662 useless extension candidates. Maximal degree in co-relation 4202. Up to 544 conditions per place. [2024-11-28 05:04:44,918 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 115 selfloop transitions, 28 changer transitions 3/147 dead transitions. [2024-11-28 05:04:44,918 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 147 transitions, 1717 flow [2024-11-28 05:04:44,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-28 05:04:44,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-28 05:04:44,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 78 transitions. [2024-11-28 05:04:44,919 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.32231404958677684 [2024-11-28 05:04:44,919 INFO L175 Difference]: Start difference. First operand has 153 places, 133 transitions, 1312 flow. Second operand 11 states and 78 transitions. [2024-11-28 05:04:44,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 147 transitions, 1717 flow [2024-11-28 05:04:44,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 147 transitions, 1647 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-11-28 05:04:44,931 INFO L231 Difference]: Finished difference. Result has 151 places, 131 transitions, 1281 flow [2024-11-28 05:04:44,932 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1233, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1281, PETRI_PLACES=151, PETRI_TRANSITIONS=131} [2024-11-28 05:04:44,932 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 129 predicate places. [2024-11-28 05:04:44,932 INFO L471 AbstractCegarLoop]: Abstraction has has 151 places, 131 transitions, 1281 flow [2024-11-28 05:04:44,932 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.15) internal successors, (103), 20 states have internal predecessors, (103), 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) [2024-11-28 05:04:44,932 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:04:44,932 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:04:44,941 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2024-11-28 05:04:45,133 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2024-11-28 05:04:45,133 INFO L396 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:04:45,133 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:04:45,133 INFO L85 PathProgramCache]: Analyzing trace with hash 1663918039, now seen corresponding path program 49 times [2024-11-28 05:04:45,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:04:45,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304957882] [2024-11-28 05:04:45,134 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 05:04:45,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:04:45,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:04:46,018 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-28 05:04:46,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:04:46,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304957882] [2024-11-28 05:04:46,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304957882] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:04:46,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438064004] [2024-11-28 05:04:46,019 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 05:04:46,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:04:46,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:04:46,022 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:04:46,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2024-11-28 05:04:46,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:04:46,317 INFO L256 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-28 05:04:46,319 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:04:46,458 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:04:46,458 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 23 [2024-11-28 05:04:46,500 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:04:46,500 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:04:47,002 INFO L349 Elim1Store]: treesize reduction 28, result has 61.6 percent of original size [2024-11-28 05:04:47,003 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 134 treesize of output 83 [2024-11-28 05:04:47,041 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:04:47,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438064004] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:04:47,041 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:04:47,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 10, 10] total 32 [2024-11-28 05:04:47,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684966597] [2024-11-28 05:04:47,041 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:04:47,041 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-28 05:04:47,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:04:47,042 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-28 05:04:47,042 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=873, Unknown=0, NotChecked=0, Total=992 [2024-11-28 05:04:47,042 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 05:04:47,042 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 131 transitions, 1281 flow. Second operand has 32 states, 32 states have (on average 4.65625) internal successors, (149), 32 states have internal predecessors, (149), 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) [2024-11-28 05:04:47,042 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:04:47,042 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 05:04:47,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:04:48,284 INFO L124 PetriNetUnfolderBase]: 511/895 cut-off events. [2024-11-28 05:04:48,284 INFO L125 PetriNetUnfolderBase]: For 6298/6298 co-relation queries the response was YES. [2024-11-28 05:04:48,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5627 conditions, 895 events. 511/895 cut-off events. For 6298/6298 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 4104 event pairs, 43 based on Foata normal form. 1/896 useless extension candidates. Maximal degree in co-relation 5556. Up to 352 conditions per place. [2024-11-28 05:04:48,290 INFO L140 encePairwiseOnDemand]: 10/22 looper letters, 107 selfloop transitions, 79 changer transitions 3/190 dead transitions. [2024-11-28 05:04:48,290 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 190 transitions, 2167 flow [2024-11-28 05:04:48,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-28 05:04:48,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-11-28 05:04:48,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 141 transitions. [2024-11-28 05:04:48,291 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.32045454545454544 [2024-11-28 05:04:48,291 INFO L175 Difference]: Start difference. First operand has 151 places, 131 transitions, 1281 flow. Second operand 20 states and 141 transitions. [2024-11-28 05:04:48,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 190 transitions, 2167 flow [2024-11-28 05:04:48,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 190 transitions, 2101 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-11-28 05:04:48,310 INFO L231 Difference]: Finished difference. Result has 162 places, 144 transitions, 1609 flow [2024-11-28 05:04:48,310 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1225, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1609, PETRI_PLACES=162, PETRI_TRANSITIONS=144} [2024-11-28 05:04:48,310 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 140 predicate places. [2024-11-28 05:04:48,310 INFO L471 AbstractCegarLoop]: Abstraction has has 162 places, 144 transitions, 1609 flow [2024-11-28 05:04:48,311 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 4.65625) internal successors, (149), 32 states have internal predecessors, (149), 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) [2024-11-28 05:04:48,311 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:04:48,311 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:04:48,319 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2024-11-28 05:04:48,511 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2024-11-28 05:04:48,511 INFO L396 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:04:48,512 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:04:48,512 INFO L85 PathProgramCache]: Analyzing trace with hash -25119297, now seen corresponding path program 50 times [2024-11-28 05:04:48,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:04:48,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310683830] [2024-11-28 05:04:48,512 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:04:48,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:04:48,535 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:04:48,535 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:04:49,236 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-28 05:04:49,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:04:49,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310683830] [2024-11-28 05:04:49,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310683830] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:04:49,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559373850] [2024-11-28 05:04:49,237 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:04:49,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:04:49,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:04:49,239 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:04:49,241 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2024-11-28 05:04:49,523 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:04:49,523 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:04:49,525 INFO L256 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-28 05:04:49,526 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:04:49,681 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:04:49,681 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 23 [2024-11-28 05:04:49,691 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:04:49,692 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:04:50,169 INFO L349 Elim1Store]: treesize reduction 15, result has 81.9 percent of original size [2024-11-28 05:04:50,170 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 181 treesize of output 113 [2024-11-28 05:04:50,269 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:04:50,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [559373850] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:04:50,269 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:04:50,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 10, 10] total 30 [2024-11-28 05:04:50,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957294307] [2024-11-28 05:04:50,269 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:04:50,270 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-28 05:04:50,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:04:50,270 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-28 05:04:50,270 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=771, Unknown=0, NotChecked=0, Total=870 [2024-11-28 05:04:50,270 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 05:04:50,271 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 144 transitions, 1609 flow. Second operand has 30 states, 30 states have (on average 4.666666666666667) internal successors, (140), 30 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:04:50,271 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:04:50,271 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 05:04:50,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:04:51,395 INFO L124 PetriNetUnfolderBase]: 527/925 cut-off events. [2024-11-28 05:04:51,395 INFO L125 PetriNetUnfolderBase]: For 8197/8197 co-relation queries the response was YES. [2024-11-28 05:04:51,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6209 conditions, 925 events. 527/925 cut-off events. For 8197/8197 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 4308 event pairs, 52 based on Foata normal form. 1/926 useless extension candidates. Maximal degree in co-relation 6132. Up to 635 conditions per place. [2024-11-28 05:04:51,400 INFO L140 encePairwiseOnDemand]: 10/22 looper letters, 95 selfloop transitions, 76 changer transitions 1/173 dead transitions. [2024-11-28 05:04:51,401 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 173 transitions, 2214 flow [2024-11-28 05:04:51,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-28 05:04:51,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-11-28 05:04:51,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 123 transitions. [2024-11-28 05:04:51,401 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3106060606060606 [2024-11-28 05:04:51,401 INFO L175 Difference]: Start difference. First operand has 162 places, 144 transitions, 1609 flow. Second operand 18 states and 123 transitions. [2024-11-28 05:04:51,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 173 transitions, 2214 flow [2024-11-28 05:04:51,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 173 transitions, 2012 flow, removed 38 selfloop flow, removed 12 redundant places. [2024-11-28 05:04:51,428 INFO L231 Difference]: Finished difference. Result has 170 places, 151 transitions, 1687 flow [2024-11-28 05:04:51,429 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1415, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1687, PETRI_PLACES=170, PETRI_TRANSITIONS=151} [2024-11-28 05:04:51,429 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 148 predicate places. [2024-11-28 05:04:51,429 INFO L471 AbstractCegarLoop]: Abstraction has has 170 places, 151 transitions, 1687 flow [2024-11-28 05:04:51,429 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 4.666666666666667) internal successors, (140), 30 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:04:51,429 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:04:51,429 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:04:51,440 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2024-11-28 05:04:51,629 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:04:51,630 INFO L396 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:04:51,630 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:04:51,630 INFO L85 PathProgramCache]: Analyzing trace with hash -375365791, now seen corresponding path program 51 times [2024-11-28 05:04:51,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:04:51,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764955717] [2024-11-28 05:04:51,630 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 05:04:51,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:04:51,653 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 05:04:51,653 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:04:52,085 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-28 05:04:52,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:04:52,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764955717] [2024-11-28 05:04:52,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764955717] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:04:52,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833545934] [2024-11-28 05:04:52,085 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 05:04:52,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:04:52,085 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:04:52,087 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:04:52,089 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2024-11-28 05:04:52,366 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 05:04:52,366 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:04:52,368 INFO L256 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-28 05:04:52,369 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:04:52,483 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:04:52,483 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 23 [2024-11-28 05:04:52,522 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:04:52,523 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:04:52,934 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2024-11-28 05:04:52,934 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 107 [2024-11-28 05:04:53,047 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:04:53,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833545934] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:04:53,047 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:04:53,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 27 [2024-11-28 05:04:53,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447659766] [2024-11-28 05:04:53,048 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:04:53,048 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-28 05:04:53,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:04:53,048 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-28 05:04:53,048 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=616, Unknown=0, NotChecked=0, Total=702 [2024-11-28 05:04:53,049 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 05:04:53,049 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 151 transitions, 1687 flow. Second operand has 27 states, 27 states have (on average 4.814814814814815) internal successors, (130), 27 states have internal predecessors, (130), 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) [2024-11-28 05:04:53,049 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:04:53,049 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 05:04:53,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:04:54,282 INFO L124 PetriNetUnfolderBase]: 601/1065 cut-off events. [2024-11-28 05:04:54,282 INFO L125 PetriNetUnfolderBase]: For 10962/10962 co-relation queries the response was YES. [2024-11-28 05:04:54,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7413 conditions, 1065 events. 601/1065 cut-off events. For 10962/10962 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 5036 event pairs, 54 based on Foata normal form. 4/1069 useless extension candidates. Maximal degree in co-relation 7333. Up to 677 conditions per place. [2024-11-28 05:04:54,289 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 138 selfloop transitions, 75 changer transitions 5/219 dead transitions. [2024-11-28 05:04:54,289 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 219 transitions, 2782 flow [2024-11-28 05:04:54,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-28 05:04:54,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-11-28 05:04:54,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 173 transitions. [2024-11-28 05:04:54,290 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3574380165289256 [2024-11-28 05:04:54,290 INFO L175 Difference]: Start difference. First operand has 170 places, 151 transitions, 1687 flow. Second operand 22 states and 173 transitions. [2024-11-28 05:04:54,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 219 transitions, 2782 flow [2024-11-28 05:04:54,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 219 transitions, 2634 flow, removed 21 selfloop flow, removed 13 redundant places. [2024-11-28 05:04:54,320 INFO L231 Difference]: Finished difference. Result has 183 places, 171 transitions, 2087 flow [2024-11-28 05:04:54,321 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1539, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=2087, PETRI_PLACES=183, PETRI_TRANSITIONS=171} [2024-11-28 05:04:54,321 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 161 predicate places. [2024-11-28 05:04:54,321 INFO L471 AbstractCegarLoop]: Abstraction has has 183 places, 171 transitions, 2087 flow [2024-11-28 05:04:54,321 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.814814814814815) internal successors, (130), 27 states have internal predecessors, (130), 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) [2024-11-28 05:04:54,321 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:04:54,321 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:04:54,328 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2024-11-28 05:04:54,522 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2024-11-28 05:04:54,522 INFO L396 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:04:54,522 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:04:54,522 INFO L85 PathProgramCache]: Analyzing trace with hash -557366495, now seen corresponding path program 52 times [2024-11-28 05:04:54,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:04:54,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787825572] [2024-11-28 05:04:54,522 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 05:04:54,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:04:54,560 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 05:04:54,560 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:04:55,429 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-28 05:04:55,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:04:55,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787825572] [2024-11-28 05:04:55,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787825572] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:04:55,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285059042] [2024-11-28 05:04:55,430 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 05:04:55,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:04:55,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:04:55,432 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:04:55,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2024-11-28 05:04:55,735 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 05:04:55,736 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:04:55,742 INFO L256 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-28 05:04:55,744 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:04:55,851 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:04:55,851 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 23 [2024-11-28 05:04:55,905 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:04:55,905 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:04:56,291 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2024-11-28 05:04:56,291 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 107 [2024-11-28 05:04:56,425 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:04:56,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285059042] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:04:56,426 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:04:56,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 10, 10] total 31 [2024-11-28 05:04:56,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966342232] [2024-11-28 05:04:56,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:04:56,426 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-28 05:04:56,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:04:56,427 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-28 05:04:56,427 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=822, Unknown=0, NotChecked=0, Total=930 [2024-11-28 05:04:56,427 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 05:04:56,427 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 171 transitions, 2087 flow. Second operand has 31 states, 31 states have (on average 4.612903225806452) internal successors, (143), 31 states have internal predecessors, (143), 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) [2024-11-28 05:04:56,427 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:04:56,427 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 05:04:56,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:04:58,549 INFO L124 PetriNetUnfolderBase]: 655/1162 cut-off events. [2024-11-28 05:04:58,549 INFO L125 PetriNetUnfolderBase]: For 14326/14326 co-relation queries the response was YES. [2024-11-28 05:04:58,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8708 conditions, 1162 events. 655/1162 cut-off events. For 14326/14326 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 5655 event pairs, 69 based on Foata normal form. 2/1164 useless extension candidates. Maximal degree in co-relation 8624. Up to 772 conditions per place. [2024-11-28 05:04:58,557 INFO L140 encePairwiseOnDemand]: 10/22 looper letters, 123 selfloop transitions, 93 changer transitions 3/220 dead transitions. [2024-11-28 05:04:58,557 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 220 transitions, 3004 flow [2024-11-28 05:04:58,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-28 05:04:58,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-11-28 05:04:58,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 181 transitions. [2024-11-28 05:04:58,558 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.31643356643356646 [2024-11-28 05:04:58,558 INFO L175 Difference]: Start difference. First operand has 183 places, 171 transitions, 2087 flow. Second operand 26 states and 181 transitions. [2024-11-28 05:04:58,558 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 220 transitions, 3004 flow [2024-11-28 05:04:58,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 220 transitions, 2723 flow, removed 97 selfloop flow, removed 12 redundant places. [2024-11-28 05:04:58,600 INFO L231 Difference]: Finished difference. Result has 199 places, 180 transitions, 2206 flow [2024-11-28 05:04:58,600 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1838, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=2206, PETRI_PLACES=199, PETRI_TRANSITIONS=180} [2024-11-28 05:04:58,601 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 177 predicate places. [2024-11-28 05:04:58,601 INFO L471 AbstractCegarLoop]: Abstraction has has 199 places, 180 transitions, 2206 flow [2024-11-28 05:04:58,601 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 4.612903225806452) internal successors, (143), 31 states have internal predecessors, (143), 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) [2024-11-28 05:04:58,601 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:04:58,601 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:04:58,612 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2024-11-28 05:04:58,801 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:04:58,801 INFO L396 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:04:58,802 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:04:58,802 INFO L85 PathProgramCache]: Analyzing trace with hash -979309765, now seen corresponding path program 53 times [2024-11-28 05:04:58,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:04:58,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741343110] [2024-11-28 05:04:58,802 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 05:04:58,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:04:58,849 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-11-28 05:04:58,849 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:05:00,039 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-28 05:05:00,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:05:00,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741343110] [2024-11-28 05:05:00,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741343110] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:05:00,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946012582] [2024-11-28 05:05:00,040 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 05:05:00,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:05:00,040 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:05:00,041 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:05:00,042 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2024-11-28 05:05:00,488 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-11-28 05:05:00,488 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:05:00,490 INFO L256 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-11-28 05:05:00,491 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:05:00,771 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:05:00,772 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2024-11-28 05:05:00,858 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-28 05:05:00,858 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:05:01,350 INFO L349 Elim1Store]: treesize reduction 15, result has 81.9 percent of original size [2024-11-28 05:05:01,350 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 181 treesize of output 113 [2024-11-28 05:05:01,490 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:05:01,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1946012582] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:05:01,490 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:05:01,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 12, 10] total 38 [2024-11-28 05:05:01,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202174797] [2024-11-28 05:05:01,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:05:01,490 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-11-28 05:05:01,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:05:01,491 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-11-28 05:05:01,491 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1271, Unknown=0, NotChecked=0, Total=1406 [2024-11-28 05:05:01,492 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 05:05:01,492 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 180 transitions, 2206 flow. Second operand has 38 states, 38 states have (on average 4.7105263157894735) internal successors, (179), 38 states have internal predecessors, (179), 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) [2024-11-28 05:05:01,492 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:05:01,492 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 05:05:01,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:05:03,079 INFO L124 PetriNetUnfolderBase]: 659/1176 cut-off events. [2024-11-28 05:05:03,079 INFO L125 PetriNetUnfolderBase]: For 12676/12676 co-relation queries the response was YES. [2024-11-28 05:05:03,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8571 conditions, 1176 events. 659/1176 cut-off events. For 12676/12676 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 5796 event pairs, 86 based on Foata normal form. 6/1182 useless extension candidates. Maximal degree in co-relation 8483. Up to 847 conditions per place. [2024-11-28 05:05:03,087 INFO L140 encePairwiseOnDemand]: 9/22 looper letters, 126 selfloop transitions, 72 changer transitions 7/206 dead transitions. [2024-11-28 05:05:03,087 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 206 transitions, 2802 flow [2024-11-28 05:05:03,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-28 05:05:03,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-28 05:05:03,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 121 transitions. [2024-11-28 05:05:03,088 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3235294117647059 [2024-11-28 05:05:03,088 INFO L175 Difference]: Start difference. First operand has 199 places, 180 transitions, 2206 flow. Second operand 17 states and 121 transitions. [2024-11-28 05:05:03,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 206 transitions, 2802 flow [2024-11-28 05:05:03,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 206 transitions, 2654 flow, removed 23 selfloop flow, removed 19 redundant places. [2024-11-28 05:05:03,123 INFO L231 Difference]: Finished difference. Result has 199 places, 181 transitions, 2254 flow [2024-11-28 05:05:03,123 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=2058, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2254, PETRI_PLACES=199, PETRI_TRANSITIONS=181} [2024-11-28 05:05:03,124 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 177 predicate places. [2024-11-28 05:05:03,124 INFO L471 AbstractCegarLoop]: Abstraction has has 199 places, 181 transitions, 2254 flow [2024-11-28 05:05:03,124 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 4.7105263157894735) internal successors, (179), 38 states have internal predecessors, (179), 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) [2024-11-28 05:05:03,124 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:05:03,124 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:05:03,136 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2024-11-28 05:05:03,324 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:05:03,325 INFO L396 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:05:03,325 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:05:03,325 INFO L85 PathProgramCache]: Analyzing trace with hash 1074580671, now seen corresponding path program 54 times [2024-11-28 05:05:03,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:05:03,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290184948] [2024-11-28 05:05:03,325 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 05:05:03,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:05:03,355 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-11-28 05:05:03,355 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:05:03,901 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-28 05:05:03,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:05:03,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290184948] [2024-11-28 05:05:03,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290184948] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:05:03,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095803680] [2024-11-28 05:05:03,902 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 05:05:03,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:05:03,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:05:03,903 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:05:03,904 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2024-11-28 05:05:04,220 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-11-28 05:05:04,220 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:05:04,223 INFO L256 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 46 conjuncts are in the unsatisfiable core [2024-11-28 05:05:04,224 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:05:04,522 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:05:04,522 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2024-11-28 05:05:04,604 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-28 05:05:04,604 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:05:04,900 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:05:04,900 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 136 treesize of output 117 [2024-11-28 05:05:05,210 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:05:05,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1095803680] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:05:05,210 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:05:05,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 10] total 30 [2024-11-28 05:05:05,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300102919] [2024-11-28 05:05:05,211 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:05:05,211 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-28 05:05:05,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:05:05,211 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-28 05:05:05,212 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=757, Unknown=0, NotChecked=0, Total=870 [2024-11-28 05:05:05,212 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 05:05:05,212 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 181 transitions, 2254 flow. Second operand has 30 states, 30 states have (on average 4.866666666666666) internal successors, (146), 30 states have internal predecessors, (146), 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) [2024-11-28 05:05:05,212 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:05:05,212 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 05:05:05,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:05:06,743 INFO L124 PetriNetUnfolderBase]: 743/1343 cut-off events. [2024-11-28 05:05:06,744 INFO L125 PetriNetUnfolderBase]: For 17290/17290 co-relation queries the response was YES. [2024-11-28 05:05:06,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10226 conditions, 1343 events. 743/1343 cut-off events. For 17290/17290 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 6777 event pairs, 271 based on Foata normal form. 5/1348 useless extension candidates. Maximal degree in co-relation 10136. Up to 1083 conditions per place. [2024-11-28 05:05:06,754 INFO L140 encePairwiseOnDemand]: 10/22 looper letters, 190 selfloop transitions, 53 changer transitions 8/252 dead transitions. [2024-11-28 05:05:06,754 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 252 transitions, 3696 flow [2024-11-28 05:05:06,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-28 05:05:06,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-11-28 05:05:06,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 167 transitions. [2024-11-28 05:05:06,755 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.36147186147186144 [2024-11-28 05:05:06,755 INFO L175 Difference]: Start difference. First operand has 199 places, 181 transitions, 2254 flow. Second operand 21 states and 167 transitions. [2024-11-28 05:05:06,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 252 transitions, 3696 flow [2024-11-28 05:05:06,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 252 transitions, 3479 flow, removed 39 selfloop flow, removed 14 redundant places. [2024-11-28 05:05:06,811 INFO L231 Difference]: Finished difference. Result has 210 places, 205 transitions, 2700 flow [2024-11-28 05:05:06,811 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=2073, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2700, PETRI_PLACES=210, PETRI_TRANSITIONS=205} [2024-11-28 05:05:06,811 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 188 predicate places. [2024-11-28 05:05:06,811 INFO L471 AbstractCegarLoop]: Abstraction has has 210 places, 205 transitions, 2700 flow [2024-11-28 05:05:06,812 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 4.866666666666666) internal successors, (146), 30 states have internal predecessors, (146), 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) [2024-11-28 05:05:06,812 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:05:06,812 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:05:06,819 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2024-11-28 05:05:07,012 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2024-11-28 05:05:07,012 INFO L396 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:05:07,013 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:05:07,013 INFO L85 PathProgramCache]: Analyzing trace with hash 1215049215, now seen corresponding path program 55 times [2024-11-28 05:05:07,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:05:07,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561717356] [2024-11-28 05:05:07,013 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 05:05:07,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:05:07,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:05:07,973 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-28 05:05:07,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:05:07,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561717356] [2024-11-28 05:05:07,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561717356] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:05:07,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088536697] [2024-11-28 05:05:07,973 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 05:05:07,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:05:07,974 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:05:07,975 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:05:07,976 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2024-11-28 05:05:08,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:05:08,278 INFO L256 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-28 05:05:08,279 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:05:08,425 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:05:08,425 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 23 [2024-11-28 05:05:08,479 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:05:08,479 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:05:08,987 INFO L349 Elim1Store]: treesize reduction 15, result has 81.9 percent of original size [2024-11-28 05:05:08,987 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 181 treesize of output 113 [2024-11-28 05:05:09,114 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:05:09,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088536697] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:05:09,115 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:05:09,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 10, 10] total 33 [2024-11-28 05:05:09,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237471748] [2024-11-28 05:05:09,115 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:05:09,115 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-28 05:05:09,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:05:09,117 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-28 05:05:09,118 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=945, Unknown=0, NotChecked=0, Total=1056 [2024-11-28 05:05:09,118 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 05:05:09,118 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 205 transitions, 2700 flow. Second operand has 33 states, 33 states have (on average 4.666666666666667) internal successors, (154), 33 states have internal predecessors, (154), 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) [2024-11-28 05:05:09,118 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:05:09,118 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 05:05:09,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:05:11,069 INFO L124 PetriNetUnfolderBase]: 805/1457 cut-off events. [2024-11-28 05:05:11,070 INFO L125 PetriNetUnfolderBase]: For 20948/20948 co-relation queries the response was YES. [2024-11-28 05:05:11,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11461 conditions, 1457 events. 805/1457 cut-off events. For 20948/20948 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 7566 event pairs, 118 based on Foata normal form. 2/1459 useless extension candidates. Maximal degree in co-relation 11366. Up to 1242 conditions per place. [2024-11-28 05:05:11,086 INFO L140 encePairwiseOnDemand]: 10/22 looper letters, 187 selfloop transitions, 73 changer transitions 3/264 dead transitions. [2024-11-28 05:05:11,087 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 264 transitions, 3866 flow [2024-11-28 05:05:11,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-28 05:05:11,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-11-28 05:05:11,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 179 transitions. [2024-11-28 05:05:11,088 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3129370629370629 [2024-11-28 05:05:11,088 INFO L175 Difference]: Start difference. First operand has 210 places, 205 transitions, 2700 flow. Second operand 26 states and 179 transitions. [2024-11-28 05:05:11,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 264 transitions, 3866 flow [2024-11-28 05:05:11,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 264 transitions, 3575 flow, removed 133 selfloop flow, removed 6 redundant places. [2024-11-28 05:05:11,154 INFO L231 Difference]: Finished difference. Result has 233 places, 229 transitions, 3025 flow [2024-11-28 05:05:11,154 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=2409, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=3025, PETRI_PLACES=233, PETRI_TRANSITIONS=229} [2024-11-28 05:05:11,158 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 211 predicate places. [2024-11-28 05:05:11,158 INFO L471 AbstractCegarLoop]: Abstraction has has 233 places, 229 transitions, 3025 flow [2024-11-28 05:05:11,158 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 4.666666666666667) internal successors, (154), 33 states have internal predecessors, (154), 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) [2024-11-28 05:05:11,158 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:05:11,158 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:05:11,166 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2024-11-28 05:05:11,359 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2024-11-28 05:05:11,359 INFO L396 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:05:11,359 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:05:11,359 INFO L85 PathProgramCache]: Analyzing trace with hash -2122900759, now seen corresponding path program 56 times [2024-11-28 05:05:11,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:05:11,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370430327] [2024-11-28 05:05:11,360 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:05:11,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:05:11,385 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:05:11,385 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:05:12,144 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-28 05:05:12,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:05:12,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370430327] [2024-11-28 05:05:12,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370430327] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:05:12,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518515732] [2024-11-28 05:05:12,144 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:05:12,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:05:12,145 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:05:12,146 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:05:12,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2024-11-28 05:05:12,451 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:05:12,451 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:05:12,453 INFO L256 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-28 05:05:12,455 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:05:12,602 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:05:12,602 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 23 [2024-11-28 05:05:12,648 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:05:12,648 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:05:13,147 INFO L349 Elim1Store]: treesize reduction 15, result has 81.9 percent of original size [2024-11-28 05:05:13,147 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 181 treesize of output 113 [2024-11-28 05:05:13,268 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:05:13,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518515732] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:05:13,268 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:05:13,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 10, 10] total 33 [2024-11-28 05:05:13,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740466045] [2024-11-28 05:05:13,268 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:05:13,269 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-28 05:05:13,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:05:13,269 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-28 05:05:13,269 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=937, Unknown=0, NotChecked=0, Total=1056 [2024-11-28 05:05:13,270 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 05:05:13,270 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 229 transitions, 3025 flow. Second operand has 33 states, 33 states have (on average 4.666666666666667) internal successors, (154), 33 states have internal predecessors, (154), 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) [2024-11-28 05:05:13,270 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:05:13,270 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 05:05:13,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:05:15,044 INFO L124 PetriNetUnfolderBase]: 861/1568 cut-off events. [2024-11-28 05:05:15,044 INFO L125 PetriNetUnfolderBase]: For 24345/24345 co-relation queries the response was YES. [2024-11-28 05:05:15,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12460 conditions, 1568 events. 861/1568 cut-off events. For 24345/24345 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 8384 event pairs, 120 based on Foata normal form. 3/1571 useless extension candidates. Maximal degree in co-relation 12358. Up to 1358 conditions per place. [2024-11-28 05:05:15,056 INFO L140 encePairwiseOnDemand]: 10/22 looper letters, 206 selfloop transitions, 67 changer transitions 5/279 dead transitions. [2024-11-28 05:05:15,056 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 279 transitions, 4202 flow [2024-11-28 05:05:15,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-28 05:05:15,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-11-28 05:05:15,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 172 transitions. [2024-11-28 05:05:15,057 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.31272727272727274 [2024-11-28 05:05:15,057 INFO L175 Difference]: Start difference. First operand has 233 places, 229 transitions, 3025 flow. Second operand 25 states and 172 transitions. [2024-11-28 05:05:15,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 279 transitions, 4202 flow [2024-11-28 05:05:15,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 279 transitions, 3898 flow, removed 114 selfloop flow, removed 14 redundant places. [2024-11-28 05:05:15,141 INFO L231 Difference]: Finished difference. Result has 248 places, 244 transitions, 3236 flow [2024-11-28 05:05:15,142 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=2721, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=3236, PETRI_PLACES=248, PETRI_TRANSITIONS=244} [2024-11-28 05:05:15,142 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 226 predicate places. [2024-11-28 05:05:15,142 INFO L471 AbstractCegarLoop]: Abstraction has has 248 places, 244 transitions, 3236 flow [2024-11-28 05:05:15,142 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 4.666666666666667) internal successors, (154), 33 states have internal predecessors, (154), 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) [2024-11-28 05:05:15,142 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:05:15,142 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:05:15,154 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2024-11-28 05:05:15,343 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2024-11-28 05:05:15,343 INFO L396 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:05:15,343 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:05:15,343 INFO L85 PathProgramCache]: Analyzing trace with hash 1256581375, now seen corresponding path program 57 times [2024-11-28 05:05:15,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:05:15,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18731698] [2024-11-28 05:05:15,343 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 05:05:15,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:05:15,371 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-28 05:05:15,371 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:05:15,801 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-28 05:05:15,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:05:15,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18731698] [2024-11-28 05:05:15,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18731698] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:05:15,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205701033] [2024-11-28 05:05:15,801 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 05:05:15,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:05:15,801 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:05:15,803 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:05:15,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2024-11-28 05:05:16,111 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-28 05:05:16,111 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:05:16,113 INFO L256 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-28 05:05:16,114 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:05:16,267 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:05:16,268 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2024-11-28 05:05:16,300 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-28 05:05:16,300 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:05:16,667 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2024-11-28 05:05:16,668 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 107 [2024-11-28 05:05:16,818 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:05:16,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205701033] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:05:16,818 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:05:16,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 10] total 26 [2024-11-28 05:05:16,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307585047] [2024-11-28 05:05:16,819 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:05:16,819 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-28 05:05:16,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:05:16,819 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-28 05:05:16,819 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=556, Unknown=0, NotChecked=0, Total=650 [2024-11-28 05:05:16,819 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 05:05:16,820 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 244 transitions, 3236 flow. Second operand has 26 states, 26 states have (on average 4.846153846153846) internal successors, (126), 26 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:05:16,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:05:16,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 05:05:16,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:05:17,948 INFO L124 PetriNetUnfolderBase]: 903/1645 cut-off events. [2024-11-28 05:05:17,949 INFO L125 PetriNetUnfolderBase]: For 32265/32265 co-relation queries the response was YES. [2024-11-28 05:05:17,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13702 conditions, 1645 events. 903/1645 cut-off events. For 32265/32265 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 8913 event pairs, 125 based on Foata normal form. 2/1645 useless extension candidates. Maximal degree in co-relation 13595. Up to 1434 conditions per place. [2024-11-28 05:05:17,962 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 234 selfloop transitions, 52 changer transitions 5/292 dead transitions. [2024-11-28 05:05:17,962 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 292 transitions, 4435 flow [2024-11-28 05:05:17,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-28 05:05:17,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-11-28 05:05:17,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 149 transitions. [2024-11-28 05:05:17,963 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3386363636363636 [2024-11-28 05:05:17,963 INFO L175 Difference]: Start difference. First operand has 248 places, 244 transitions, 3236 flow. Second operand 20 states and 149 transitions. [2024-11-28 05:05:17,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 292 transitions, 4435 flow [2024-11-28 05:05:18,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 292 transitions, 4143 flow, removed 106 selfloop flow, removed 16 redundant places. [2024-11-28 05:05:18,066 INFO L231 Difference]: Finished difference. Result has 253 places, 258 transitions, 3404 flow [2024-11-28 05:05:18,066 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=2964, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=3404, PETRI_PLACES=253, PETRI_TRANSITIONS=258} [2024-11-28 05:05:18,067 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 231 predicate places. [2024-11-28 05:05:18,067 INFO L471 AbstractCegarLoop]: Abstraction has has 253 places, 258 transitions, 3404 flow [2024-11-28 05:05:18,067 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.846153846153846) internal successors, (126), 26 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:05:18,067 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:05:18,067 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:05:18,078 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2024-11-28 05:05:18,267 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2024-11-28 05:05:18,268 INFO L396 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:05:18,268 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:05:18,268 INFO L85 PathProgramCache]: Analyzing trace with hash 1885053645, now seen corresponding path program 58 times [2024-11-28 05:05:18,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:05:18,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890786297] [2024-11-28 05:05:18,268 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 05:05:18,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:05:18,291 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 05:05:18,292 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:05:19,189 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-28 05:05:19,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:05:19,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890786297] [2024-11-28 05:05:19,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890786297] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:05:19,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855424501] [2024-11-28 05:05:19,189 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 05:05:19,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:05:19,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:05:19,191 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:05:19,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2024-11-28 05:05:19,504 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 05:05:19,504 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:05:19,505 INFO L256 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-28 05:05:19,506 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:05:19,636 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:05:19,637 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 23 [2024-11-28 05:05:19,723 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:05:19,723 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:05:20,235 INFO L349 Elim1Store]: treesize reduction 15, result has 81.9 percent of original size [2024-11-28 05:05:20,235 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 181 treesize of output 113 [2024-11-28 05:05:20,352 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:05:20,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855424501] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:05:20,352 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:05:20,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 10, 10] total 33 [2024-11-28 05:05:20,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352702947] [2024-11-28 05:05:20,352 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:05:20,353 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-28 05:05:20,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:05:20,353 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-28 05:05:20,354 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=942, Unknown=0, NotChecked=0, Total=1056 [2024-11-28 05:05:20,354 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 05:05:20,354 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 258 transitions, 3404 flow. Second operand has 33 states, 33 states have (on average 4.666666666666667) internal successors, (154), 33 states have internal predecessors, (154), 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) [2024-11-28 05:05:20,354 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:05:20,354 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 05:05:20,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:05:22,351 INFO L124 PetriNetUnfolderBase]: 907/1661 cut-off events. [2024-11-28 05:05:22,351 INFO L125 PetriNetUnfolderBase]: For 33465/33465 co-relation queries the response was YES. [2024-11-28 05:05:22,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13760 conditions, 1661 events. 907/1661 cut-off events. For 33465/33465 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 9071 event pairs, 130 based on Foata normal form. 2/1661 useless extension candidates. Maximal degree in co-relation 13652. Up to 1422 conditions per place. [2024-11-28 05:05:22,363 INFO L140 encePairwiseOnDemand]: 9/22 looper letters, 220 selfloop transitions, 69 changer transitions 3/293 dead transitions. [2024-11-28 05:05:22,363 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 293 transitions, 4364 flow [2024-11-28 05:05:22,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-28 05:05:22,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-11-28 05:05:22,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 168 transitions. [2024-11-28 05:05:22,364 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3054545454545455 [2024-11-28 05:05:22,364 INFO L175 Difference]: Start difference. First operand has 253 places, 258 transitions, 3404 flow. Second operand 25 states and 168 transitions. [2024-11-28 05:05:22,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 293 transitions, 4364 flow [2024-11-28 05:05:22,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 293 transitions, 4115 flow, removed 98 selfloop flow, removed 12 redundant places. [2024-11-28 05:05:22,471 INFO L231 Difference]: Finished difference. Result has 268 places, 262 transitions, 3418 flow [2024-11-28 05:05:22,471 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=3165, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=3418, PETRI_PLACES=268, PETRI_TRANSITIONS=262} [2024-11-28 05:05:22,471 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 246 predicate places. [2024-11-28 05:05:22,471 INFO L471 AbstractCegarLoop]: Abstraction has has 268 places, 262 transitions, 3418 flow [2024-11-28 05:05:22,471 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 4.666666666666667) internal successors, (154), 33 states have internal predecessors, (154), 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) [2024-11-28 05:05:22,471 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:05:22,472 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:05:22,481 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2024-11-28 05:05:22,672 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2024-11-28 05:05:22,672 INFO L396 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:05:22,672 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:05:22,672 INFO L85 PathProgramCache]: Analyzing trace with hash 114781823, now seen corresponding path program 59 times [2024-11-28 05:05:22,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:05:22,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417401805] [2024-11-28 05:05:22,673 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 05:05:22,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:05:22,706 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-11-28 05:05:22,706 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:05:23,923 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 3 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:05:23,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:05:23,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417401805] [2024-11-28 05:05:23,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417401805] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:05:23,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651039689] [2024-11-28 05:05:23,924 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 05:05:23,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:05:23,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:05:23,925 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:05:23,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2024-11-28 05:05:24,453 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-11-28 05:05:24,453 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:05:24,456 INFO L256 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-11-28 05:05:24,457 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:05:24,558 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-11-28 05:05:24,775 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:05:24,775 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 23 [2024-11-28 05:05:24,881 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-28 05:05:24,881 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:05:26,108 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:05:26,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651039689] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:05:26,109 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:05:26,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 13, 10] total 43 [2024-11-28 05:05:26,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188116799] [2024-11-28 05:05:26,109 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:05:26,109 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2024-11-28 05:05:26,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:05:26,110 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2024-11-28 05:05:26,110 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1650, Unknown=0, NotChecked=0, Total=1806 [2024-11-28 05:05:26,110 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 05:05:26,111 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 262 transitions, 3418 flow. Second operand has 43 states, 43 states have (on average 4.627906976744186) internal successors, (199), 43 states have internal predecessors, (199), 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) [2024-11-28 05:05:26,111 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:05:26,111 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 05:05:26,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:05:28,861 INFO L124 PetriNetUnfolderBase]: 923/1707 cut-off events. [2024-11-28 05:05:28,861 INFO L125 PetriNetUnfolderBase]: For 34536/34536 co-relation queries the response was YES. [2024-11-28 05:05:28,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14066 conditions, 1707 events. 923/1707 cut-off events. For 34536/34536 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 9516 event pairs, 140 based on Foata normal form. 3/1708 useless extension candidates. Maximal degree in co-relation 13954. Up to 1451 conditions per place. [2024-11-28 05:05:28,874 INFO L140 encePairwiseOnDemand]: 10/22 looper letters, 233 selfloop transitions, 65 changer transitions 4/303 dead transitions. [2024-11-28 05:05:28,874 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 303 transitions, 4422 flow [2024-11-28 05:05:28,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-28 05:05:28,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-11-28 05:05:28,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 161 transitions. [2024-11-28 05:05:28,875 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.33264462809917356 [2024-11-28 05:05:28,875 INFO L175 Difference]: Start difference. First operand has 268 places, 262 transitions, 3418 flow. Second operand 22 states and 161 transitions. [2024-11-28 05:05:28,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 303 transitions, 4422 flow [2024-11-28 05:05:28,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 303 transitions, 4241 flow, removed 45 selfloop flow, removed 20 redundant places. [2024-11-28 05:05:28,988 INFO L231 Difference]: Finished difference. Result has 273 places, 267 transitions, 3539 flow [2024-11-28 05:05:28,988 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=3239, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=3539, PETRI_PLACES=273, PETRI_TRANSITIONS=267} [2024-11-28 05:05:28,988 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 251 predicate places. [2024-11-28 05:05:28,988 INFO L471 AbstractCegarLoop]: Abstraction has has 273 places, 267 transitions, 3539 flow [2024-11-28 05:05:28,989 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 4.627906976744186) internal successors, (199), 43 states have internal predecessors, (199), 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) [2024-11-28 05:05:28,989 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:05:28,989 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:05:29,000 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2024-11-28 05:05:29,189 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2024-11-28 05:05:29,189 INFO L396 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:05:29,190 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:05:29,190 INFO L85 PathProgramCache]: Analyzing trace with hash -1768491743, now seen corresponding path program 60 times [2024-11-28 05:05:29,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:05:29,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976717961] [2024-11-28 05:05:29,190 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 05:05:29,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:05:29,235 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-11-28 05:05:29,235 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:05:29,704 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-28 05:05:29,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:05:29,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976717961] [2024-11-28 05:05:29,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976717961] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:05:29,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647804064] [2024-11-28 05:05:29,705 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 05:05:29,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:05:29,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:05:29,707 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:05:29,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2024-11-28 05:05:30,037 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-11-28 05:05:30,037 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:05:30,039 INFO L256 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-28 05:05:30,040 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:05:30,243 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:05:30,243 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2024-11-28 05:05:30,312 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-28 05:05:30,312 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:05:30,727 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2024-11-28 05:05:30,728 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 107 [2024-11-28 05:05:30,878 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:05:30,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647804064] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:05:30,879 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:05:30,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 10] total 31 [2024-11-28 05:05:30,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440962699] [2024-11-28 05:05:30,879 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:05:30,879 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-28 05:05:30,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:05:30,880 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-28 05:05:30,880 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=798, Unknown=0, NotChecked=0, Total=930 [2024-11-28 05:05:30,880 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 05:05:30,880 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 267 transitions, 3539 flow. Second operand has 31 states, 31 states have (on average 4.870967741935484) internal successors, (151), 31 states have internal predecessors, (151), 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) [2024-11-28 05:05:30,880 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:05:30,880 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 05:05:30,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:05:32,072 INFO L124 PetriNetUnfolderBase]: 931/1729 cut-off events. [2024-11-28 05:05:32,072 INFO L125 PetriNetUnfolderBase]: For 36417/36417 co-relation queries the response was YES. [2024-11-28 05:05:32,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14313 conditions, 1729 events. 931/1729 cut-off events. For 36417/36417 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 9732 event pairs, 149 based on Foata normal form. 2/1731 useless extension candidates. Maximal degree in co-relation 14199. Up to 1493 conditions per place. [2024-11-28 05:05:32,086 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 245 selfloop transitions, 52 changer transitions 6/304 dead transitions. [2024-11-28 05:05:32,086 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 304 transitions, 4500 flow [2024-11-28 05:05:32,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-28 05:05:32,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-11-28 05:05:32,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 145 transitions. [2024-11-28 05:05:32,087 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.34688995215311 [2024-11-28 05:05:32,087 INFO L175 Difference]: Start difference. First operand has 273 places, 267 transitions, 3539 flow. Second operand 19 states and 145 transitions. [2024-11-28 05:05:32,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 304 transitions, 4500 flow [2024-11-28 05:05:32,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 304 transitions, 4343 flow, removed 40 selfloop flow, removed 16 redundant places. [2024-11-28 05:05:32,199 INFO L231 Difference]: Finished difference. Result has 277 places, 269 transitions, 3568 flow [2024-11-28 05:05:32,199 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=3384, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=3568, PETRI_PLACES=277, PETRI_TRANSITIONS=269} [2024-11-28 05:05:32,199 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 255 predicate places. [2024-11-28 05:05:32,200 INFO L471 AbstractCegarLoop]: Abstraction has has 277 places, 269 transitions, 3568 flow [2024-11-28 05:05:32,200 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 4.870967741935484) internal successors, (151), 31 states have internal predecessors, (151), 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) [2024-11-28 05:05:32,200 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:05:32,200 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:05:32,210 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2024-11-28 05:05:32,400 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2024-11-28 05:05:32,400 INFO L396 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:05:32,401 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:05:32,401 INFO L85 PathProgramCache]: Analyzing trace with hash 1916106865, now seen corresponding path program 61 times [2024-11-28 05:05:32,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:05:32,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659820106] [2024-11-28 05:05:32,401 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 05:05:32,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:05:32,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:05:33,305 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-28 05:05:33,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:05:33,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659820106] [2024-11-28 05:05:33,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659820106] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:05:33,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934193667] [2024-11-28 05:05:33,305 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 05:05:33,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:05:33,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:05:33,307 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:05:33,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2024-11-28 05:05:33,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:05:33,629 INFO L256 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-28 05:05:33,630 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:05:33,757 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:05:33,757 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 23 [2024-11-28 05:05:33,802 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:05:33,802 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:05:34,187 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2024-11-28 05:05:34,187 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 107 [2024-11-28 05:05:34,338 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:05:34,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934193667] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:05:34,338 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:05:34,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 10, 10] total 33 [2024-11-28 05:05:34,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796819527] [2024-11-28 05:05:34,338 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:05:34,338 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-28 05:05:34,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:05:34,339 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-28 05:05:34,339 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=934, Unknown=0, NotChecked=0, Total=1056 [2024-11-28 05:05:34,339 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 05:05:34,339 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 269 transitions, 3568 flow. Second operand has 33 states, 33 states have (on average 4.636363636363637) internal successors, (153), 33 states have internal predecessors, (153), 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) [2024-11-28 05:05:34,340 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:05:34,340 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 05:05:34,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:05:36,001 INFO L124 PetriNetUnfolderBase]: 1009/1876 cut-off events. [2024-11-28 05:05:36,002 INFO L125 PetriNetUnfolderBase]: For 41795/41795 co-relation queries the response was YES. [2024-11-28 05:05:36,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16037 conditions, 1876 events. 1009/1876 cut-off events. For 41795/41795 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 10819 event pairs, 354 based on Foata normal form. 4/1878 useless extension candidates. Maximal degree in co-relation 15922. Up to 1614 conditions per place. [2024-11-28 05:05:36,018 INFO L140 encePairwiseOnDemand]: 10/22 looper letters, 253 selfloop transitions, 67 changer transitions 6/327 dead transitions. [2024-11-28 05:05:36,019 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 327 transitions, 5187 flow [2024-11-28 05:05:36,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-28 05:05:36,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-11-28 05:05:36,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 172 transitions. [2024-11-28 05:05:36,020 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.32575757575757575 [2024-11-28 05:05:36,020 INFO L175 Difference]: Start difference. First operand has 277 places, 269 transitions, 3568 flow. Second operand 24 states and 172 transitions. [2024-11-28 05:05:36,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 327 transitions, 5187 flow [2024-11-28 05:05:36,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 327 transitions, 5070 flow, removed 22 selfloop flow, removed 16 redundant places. [2024-11-28 05:05:36,154 INFO L231 Difference]: Finished difference. Result has 289 places, 287 transitions, 4159 flow [2024-11-28 05:05:36,155 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=3455, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=4159, PETRI_PLACES=289, PETRI_TRANSITIONS=287} [2024-11-28 05:05:36,155 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 267 predicate places. [2024-11-28 05:05:36,155 INFO L471 AbstractCegarLoop]: Abstraction has has 289 places, 287 transitions, 4159 flow [2024-11-28 05:05:36,155 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 4.636363636363637) internal successors, (153), 33 states have internal predecessors, (153), 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) [2024-11-28 05:05:36,155 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:05:36,155 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:05:36,166 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2024-11-28 05:05:36,356 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2024-11-28 05:05:36,356 INFO L396 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:05:36,356 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:05:36,356 INFO L85 PathProgramCache]: Analyzing trace with hash -1018493617, now seen corresponding path program 62 times [2024-11-28 05:05:36,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:05:36,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670476300] [2024-11-28 05:05:36,356 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:05:36,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:05:36,379 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:05:36,379 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:05:37,225 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-28 05:05:37,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:05:37,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670476300] [2024-11-28 05:05:37,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670476300] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:05:37,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164762389] [2024-11-28 05:05:37,226 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:05:37,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:05:37,226 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:05:37,228 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:05:37,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2024-11-28 05:05:37,554 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:05:37,554 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:05:37,556 INFO L256 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-28 05:05:37,557 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:05:37,699 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:05:37,699 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 23 [2024-11-28 05:05:37,749 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:05:37,749 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:05:38,219 INFO L349 Elim1Store]: treesize reduction 15, result has 81.9 percent of original size [2024-11-28 05:05:38,219 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 181 treesize of output 113 [2024-11-28 05:05:38,348 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:05:38,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164762389] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:05:38,348 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:05:38,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 10, 10] total 33 [2024-11-28 05:05:38,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659008809] [2024-11-28 05:05:38,349 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:05:38,349 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-28 05:05:38,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:05:38,349 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-28 05:05:38,350 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=944, Unknown=0, NotChecked=0, Total=1056 [2024-11-28 05:05:38,350 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 05:05:38,350 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 287 transitions, 4159 flow. Second operand has 33 states, 33 states have (on average 4.636363636363637) internal successors, (153), 33 states have internal predecessors, (153), 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) [2024-11-28 05:05:38,350 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:05:38,350 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 05:05:38,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:05:40,399 INFO L124 PetriNetUnfolderBase]: 1069/1983 cut-off events. [2024-11-28 05:05:40,399 INFO L125 PetriNetUnfolderBase]: For 54003/54003 co-relation queries the response was YES. [2024-11-28 05:05:40,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18028 conditions, 1983 events. 1069/1983 cut-off events. For 54003/54003 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 11555 event pairs, 363 based on Foata normal form. 2/1983 useless extension candidates. Maximal degree in co-relation 17908. Up to 1746 conditions per place. [2024-11-28 05:05:40,418 INFO L140 encePairwiseOnDemand]: 10/22 looper letters, 257 selfloop transitions, 77 changer transitions 4/339 dead transitions. [2024-11-28 05:05:40,418 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 339 transitions, 5692 flow [2024-11-28 05:05:40,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-28 05:05:40,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-11-28 05:05:40,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 174 transitions. [2024-11-28 05:05:40,419 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3041958041958042 [2024-11-28 05:05:40,419 INFO L175 Difference]: Start difference. First operand has 289 places, 287 transitions, 4159 flow. Second operand 26 states and 174 transitions. [2024-11-28 05:05:40,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 339 transitions, 5692 flow [2024-11-28 05:05:40,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 339 transitions, 5366 flow, removed 134 selfloop flow, removed 13 redundant places. [2024-11-28 05:05:40,586 INFO L231 Difference]: Finished difference. Result has 306 places, 309 transitions, 4666 flow [2024-11-28 05:05:40,586 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=3845, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=4666, PETRI_PLACES=306, PETRI_TRANSITIONS=309} [2024-11-28 05:05:40,586 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 284 predicate places. [2024-11-28 05:05:40,586 INFO L471 AbstractCegarLoop]: Abstraction has has 306 places, 309 transitions, 4666 flow [2024-11-28 05:05:40,587 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 4.636363636363637) internal successors, (153), 33 states have internal predecessors, (153), 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) [2024-11-28 05:05:40,587 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:05:40,587 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:05:40,594 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2024-11-28 05:05:40,787 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:05:40,787 INFO L396 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:05:40,788 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:05:40,788 INFO L85 PathProgramCache]: Analyzing trace with hash -976481201, now seen corresponding path program 63 times [2024-11-28 05:05:40,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:05:40,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043191837] [2024-11-28 05:05:40,788 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 05:05:40,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:05:40,816 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 05:05:40,816 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:05:41,196 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-28 05:05:41,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:05:41,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043191837] [2024-11-28 05:05:41,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043191837] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:05:41,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717043725] [2024-11-28 05:05:41,197 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 05:05:41,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:05:41,197 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:05:41,200 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:05:41,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2024-11-28 05:05:41,522 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 05:05:41,523 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:05:41,524 INFO L256 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-28 05:05:41,525 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:05:41,645 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:05:41,645 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 23 [2024-11-28 05:05:41,684 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:05:41,685 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:05:42,170 INFO L349 Elim1Store]: treesize reduction 28, result has 61.6 percent of original size [2024-11-28 05:05:42,170 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 134 treesize of output 83 [2024-11-28 05:05:42,204 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:05:42,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717043725] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:05:42,204 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:05:42,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 27 [2024-11-28 05:05:42,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530190370] [2024-11-28 05:05:42,205 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:05:42,205 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-28 05:05:42,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:05:42,205 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-28 05:05:42,205 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=615, Unknown=0, NotChecked=0, Total=702 [2024-11-28 05:05:42,206 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 05:05:42,206 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 309 transitions, 4666 flow. Second operand has 27 states, 27 states have (on average 4.814814814814815) internal successors, (130), 27 states have internal predecessors, (130), 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) [2024-11-28 05:05:42,206 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:05:42,206 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 05:05:42,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:05:43,357 INFO L124 PetriNetUnfolderBase]: 1154/2135 cut-off events. [2024-11-28 05:05:43,357 INFO L125 PetriNetUnfolderBase]: For 65502/65502 co-relation queries the response was YES. [2024-11-28 05:05:43,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19955 conditions, 2135 events. 1154/2135 cut-off events. For 65502/65502 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 12712 event pairs, 228 based on Foata normal form. 1/2134 useless extension candidates. Maximal degree in co-relation 19830. Up to 1022 conditions per place. [2024-11-28 05:05:43,378 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 241 selfloop transitions, 113 changer transitions 3/358 dead transitions. [2024-11-28 05:05:43,378 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 358 transitions, 6323 flow [2024-11-28 05:05:43,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-28 05:05:43,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-28 05:05:43,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 106 transitions. [2024-11-28 05:05:43,379 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.34415584415584416 [2024-11-28 05:05:43,379 INFO L175 Difference]: Start difference. First operand has 306 places, 309 transitions, 4666 flow. Second operand 14 states and 106 transitions. [2024-11-28 05:05:43,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 358 transitions, 6323 flow [2024-11-28 05:05:43,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 358 transitions, 5800 flow, removed 219 selfloop flow, removed 16 redundant places. [2024-11-28 05:05:43,593 INFO L231 Difference]: Finished difference. Result has 308 places, 322 transitions, 4851 flow [2024-11-28 05:05:43,593 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=4175, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=309, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=4851, PETRI_PLACES=308, PETRI_TRANSITIONS=322} [2024-11-28 05:05:43,593 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 286 predicate places. [2024-11-28 05:05:43,593 INFO L471 AbstractCegarLoop]: Abstraction has has 308 places, 322 transitions, 4851 flow [2024-11-28 05:05:43,594 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.814814814814815) internal successors, (130), 27 states have internal predecessors, (130), 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) [2024-11-28 05:05:43,594 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:05:43,594 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:05:43,601 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2024-11-28 05:05:43,794 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2024-11-28 05:05:43,794 INFO L396 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:05:43,795 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:05:43,795 INFO L85 PathProgramCache]: Analyzing trace with hash 1378251287, now seen corresponding path program 64 times [2024-11-28 05:05:43,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:05:43,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675228342] [2024-11-28 05:05:43,795 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 05:05:43,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:05:43,818 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 05:05:43,818 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:05:44,561 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-28 05:05:44,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:05:44,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675228342] [2024-11-28 05:05:44,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675228342] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:05:44,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805818848] [2024-11-28 05:05:44,562 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 05:05:44,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:05:44,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:05:44,563 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:05:44,566 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2024-11-28 05:05:44,900 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 05:05:44,900 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:05:44,902 INFO L256 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-28 05:05:44,903 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:05:45,036 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:05:45,036 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 23 [2024-11-28 05:05:45,082 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:05:45,082 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:05:45,472 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2024-11-28 05:05:45,472 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 107 [2024-11-28 05:05:45,617 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:05:45,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805818848] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:05:45,617 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:05:45,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 10, 10] total 33 [2024-11-28 05:05:45,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457804957] [2024-11-28 05:05:45,617 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:05:45,617 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-28 05:05:45,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:05:45,618 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-28 05:05:45,618 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=936, Unknown=0, NotChecked=0, Total=1056 [2024-11-28 05:05:45,618 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 05:05:45,618 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 322 transitions, 4851 flow. Second operand has 33 states, 33 states have (on average 4.636363636363637) internal successors, (153), 33 states have internal predecessors, (153), 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) [2024-11-28 05:05:45,619 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:05:45,619 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 05:05:45,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:05:47,398 INFO L124 PetriNetUnfolderBase]: 1210/2239 cut-off events. [2024-11-28 05:05:47,398 INFO L125 PetriNetUnfolderBase]: For 70312/70312 co-relation queries the response was YES. [2024-11-28 05:05:47,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21361 conditions, 2239 events. 1210/2239 cut-off events. For 70312/70312 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 13480 event pairs, 401 based on Foata normal form. 2/2237 useless extension candidates. Maximal degree in co-relation 21233. Up to 1993 conditions per place. [2024-11-28 05:05:47,420 INFO L140 encePairwiseOnDemand]: 10/22 looper letters, 300 selfloop transitions, 71 changer transitions 4/376 dead transitions. [2024-11-28 05:05:47,421 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 376 transitions, 6581 flow [2024-11-28 05:05:47,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-28 05:05:47,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-11-28 05:05:47,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 173 transitions. [2024-11-28 05:05:47,422 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3145454545454546 [2024-11-28 05:05:47,422 INFO L175 Difference]: Start difference. First operand has 308 places, 322 transitions, 4851 flow. Second operand 25 states and 173 transitions. [2024-11-28 05:05:47,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 376 transitions, 6581 flow [2024-11-28 05:05:47,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 376 transitions, 6373 flow, removed 58 selfloop flow, removed 7 redundant places. [2024-11-28 05:05:47,669 INFO L231 Difference]: Finished difference. Result has 330 places, 339 transitions, 5384 flow [2024-11-28 05:05:47,669 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=4648, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=5384, PETRI_PLACES=330, PETRI_TRANSITIONS=339} [2024-11-28 05:05:47,669 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 308 predicate places. [2024-11-28 05:05:47,669 INFO L471 AbstractCegarLoop]: Abstraction has has 330 places, 339 transitions, 5384 flow [2024-11-28 05:05:47,669 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 4.636363636363637) internal successors, (153), 33 states have internal predecessors, (153), 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) [2024-11-28 05:05:47,669 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:05:47,669 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:05:47,677 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2024-11-28 05:05:47,870 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2024-11-28 05:05:47,870 INFO L396 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:05:47,870 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:05:47,870 INFO L85 PathProgramCache]: Analyzing trace with hash 767675735, now seen corresponding path program 65 times [2024-11-28 05:05:47,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:05:47,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164730755] [2024-11-28 05:05:47,871 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 05:05:47,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:05:47,911 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-11-28 05:05:47,911 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:05:48,729 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 05:05:48,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:05:48,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164730755] [2024-11-28 05:05:48,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164730755] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:05:48,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221205682] [2024-11-28 05:05:48,729 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 05:05:48,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:05:48,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:05:48,731 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:05:48,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2024-11-28 05:05:49,273 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-11-28 05:05:49,274 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:05:49,277 INFO L256 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-11-28 05:05:49,279 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:05:49,382 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 19 treesize of output 1 [2024-11-28 05:05:49,412 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 19 treesize of output 1 [2024-11-28 05:05:49,695 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:05:49,695 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2024-11-28 05:05:49,748 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 11 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-28 05:05:49,749 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:05:50,892 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:05:50,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221205682] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:05:50,892 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:05:50,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 10] total 43 [2024-11-28 05:05:50,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806901894] [2024-11-28 05:05:50,892 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:05:50,893 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2024-11-28 05:05:50,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:05:50,893 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2024-11-28 05:05:50,893 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=1611, Unknown=0, NotChecked=0, Total=1806 [2024-11-28 05:05:50,894 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 05:05:50,894 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 339 transitions, 5384 flow. Second operand has 43 states, 43 states have (on average 4.604651162790698) internal successors, (198), 43 states have internal predecessors, (198), 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) [2024-11-28 05:05:50,894 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:05:50,894 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 05:05:50,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:05:53,286 INFO L124 PetriNetUnfolderBase]: 1266/2343 cut-off events. [2024-11-28 05:05:53,286 INFO L125 PetriNetUnfolderBase]: For 91098/91098 co-relation queries the response was YES. [2024-11-28 05:05:53,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23702 conditions, 2343 events. 1266/2343 cut-off events. For 91098/91098 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 14285 event pairs, 350 based on Foata normal form. 2/2341 useless extension candidates. Maximal degree in co-relation 23568. Up to 1786 conditions per place. [2024-11-28 05:05:53,312 INFO L140 encePairwiseOnDemand]: 9/22 looper letters, 277 selfloop transitions, 116 changer transitions 3/397 dead transitions. [2024-11-28 05:05:53,312 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 397 transitions, 7236 flow [2024-11-28 05:05:53,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-28 05:05:53,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-11-28 05:05:53,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 179 transitions. [2024-11-28 05:05:53,313 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.32545454545454544 [2024-11-28 05:05:53,313 INFO L175 Difference]: Start difference. First operand has 330 places, 339 transitions, 5384 flow. Second operand 25 states and 179 transitions. [2024-11-28 05:05:53,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 397 transitions, 7236 flow [2024-11-28 05:05:53,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 397 transitions, 6857 flow, removed 149 selfloop flow, removed 15 redundant places. [2024-11-28 05:05:53,655 INFO L231 Difference]: Finished difference. Result has 344 places, 356 transitions, 5832 flow [2024-11-28 05:05:53,655 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=5005, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=5832, PETRI_PLACES=344, PETRI_TRANSITIONS=356} [2024-11-28 05:05:53,655 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 322 predicate places. [2024-11-28 05:05:53,655 INFO L471 AbstractCegarLoop]: Abstraction has has 344 places, 356 transitions, 5832 flow [2024-11-28 05:05:53,656 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 4.604651162790698) internal successors, (198), 43 states have internal predecessors, (198), 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) [2024-11-28 05:05:53,656 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:05:53,656 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:05:53,663 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2024-11-28 05:05:53,856 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:05:53,856 INFO L396 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:05:53,857 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:05:53,857 INFO L85 PathProgramCache]: Analyzing trace with hash 1169689559, now seen corresponding path program 66 times [2024-11-28 05:05:53,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:05:53,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907356283] [2024-11-28 05:05:53,857 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 05:05:53,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:05:53,878 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-28 05:05:53,879 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:05:54,270 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-28 05:05:54,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:05:54,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907356283] [2024-11-28 05:05:54,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907356283] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:05:54,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182474054] [2024-11-28 05:05:54,270 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 05:05:54,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:05:54,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:05:54,272 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:05:54,273 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2024-11-28 05:05:54,606 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-28 05:05:54,606 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:05:54,607 INFO L256 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-28 05:05:54,608 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:05:54,742 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:05:54,742 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 23 [2024-11-28 05:05:54,793 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:05:54,793 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:05:55,254 INFO L349 Elim1Store]: treesize reduction 15, result has 81.9 percent of original size [2024-11-28 05:05:55,254 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 181 treesize of output 113 [2024-11-28 05:05:55,363 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:05:55,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182474054] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:05:55,363 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:05:55,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 27 [2024-11-28 05:05:55,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856814011] [2024-11-28 05:05:55,363 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:05:55,364 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-28 05:05:55,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:05:55,364 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-28 05:05:55,364 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2024-11-28 05:05:55,364 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 05:05:55,365 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 356 transitions, 5832 flow. Second operand has 27 states, 27 states have (on average 4.814814814814815) internal successors, (130), 27 states have internal predecessors, (130), 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) [2024-11-28 05:05:55,365 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:05:55,365 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 05:05:55,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:05:56,707 INFO L124 PetriNetUnfolderBase]: 1281/2371 cut-off events. [2024-11-28 05:05:56,707 INFO L125 PetriNetUnfolderBase]: For 104369/104369 co-relation queries the response was YES. [2024-11-28 05:05:56,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24909 conditions, 2371 events. 1281/2371 cut-off events. For 104369/104369 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 14517 event pairs, 360 based on Foata normal form. 1/2368 useless extension candidates. Maximal degree in co-relation 24771. Up to 1912 conditions per place. [2024-11-28 05:05:56,733 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 298 selfloop transitions, 85 changer transitions 3/387 dead transitions. [2024-11-28 05:05:56,733 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 387 transitions, 7148 flow [2024-11-28 05:05:56,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-28 05:05:56,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-11-28 05:05:56,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 111 transitions. [2024-11-28 05:05:56,734 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3153409090909091 [2024-11-28 05:05:56,734 INFO L175 Difference]: Start difference. First operand has 344 places, 356 transitions, 5832 flow. Second operand 16 states and 111 transitions. [2024-11-28 05:05:56,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 387 transitions, 7148 flow [2024-11-28 05:05:57,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 387 transitions, 6602 flow, removed 178 selfloop flow, removed 19 redundant places. [2024-11-28 05:05:57,115 INFO L231 Difference]: Finished difference. Result has 342 places, 366 transitions, 5817 flow [2024-11-28 05:05:57,115 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=5286, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=5817, PETRI_PLACES=342, PETRI_TRANSITIONS=366} [2024-11-28 05:05:57,115 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 320 predicate places. [2024-11-28 05:05:57,116 INFO L471 AbstractCegarLoop]: Abstraction has has 342 places, 366 transitions, 5817 flow [2024-11-28 05:05:57,116 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.814814814814815) internal successors, (130), 27 states have internal predecessors, (130), 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) [2024-11-28 05:05:57,116 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:05:57,116 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:05:57,126 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2024-11-28 05:05:57,316 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:05:57,316 INFO L396 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:05:57,317 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:05:57,317 INFO L85 PathProgramCache]: Analyzing trace with hash 636067999, now seen corresponding path program 67 times [2024-11-28 05:05:57,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:05:57,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107550609] [2024-11-28 05:05:57,317 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 05:05:57,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:05:57,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:05:58,164 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 1 proven. 25 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-28 05:05:58,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:05:58,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107550609] [2024-11-28 05:05:58,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107550609] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:05:58,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464735210] [2024-11-28 05:05:58,164 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 05:05:58,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:05:58,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:05:58,166 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:05:58,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2024-11-28 05:05:58,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:05:58,520 INFO L256 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-28 05:05:58,521 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:05:58,653 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:05:58,653 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 23 [2024-11-28 05:05:58,731 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:05:58,731 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:05:59,212 INFO L349 Elim1Store]: treesize reduction 15, result has 81.9 percent of original size [2024-11-28 05:05:59,213 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 181 treesize of output 113 [2024-11-28 05:05:59,336 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:05:59,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464735210] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:05:59,336 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:05:59,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 10, 10] total 33 [2024-11-28 05:05:59,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140604053] [2024-11-28 05:05:59,336 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:05:59,336 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-28 05:05:59,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:05:59,337 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-28 05:05:59,337 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=941, Unknown=0, NotChecked=0, Total=1056 [2024-11-28 05:05:59,337 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 05:05:59,337 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 366 transitions, 5817 flow. Second operand has 33 states, 33 states have (on average 4.636363636363637) internal successors, (153), 33 states have internal predecessors, (153), 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) [2024-11-28 05:05:59,337 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:05:59,337 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 05:05:59,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:06:01,438 INFO L124 PetriNetUnfolderBase]: 1289/2405 cut-off events. [2024-11-28 05:06:01,438 INFO L125 PetriNetUnfolderBase]: For 107336/107336 co-relation queries the response was YES. [2024-11-28 05:06:01,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24988 conditions, 2405 events. 1289/2405 cut-off events. For 107336/107336 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 14949 event pairs, 422 based on Foata normal form. 3/2404 useless extension candidates. Maximal degree in co-relation 24849. Up to 2103 conditions per place. [2024-11-28 05:06:01,461 INFO L140 encePairwiseOnDemand]: 9/22 looper letters, 314 selfloop transitions, 80 changer transitions 5/400 dead transitions. [2024-11-28 05:06:01,461 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 400 transitions, 7073 flow [2024-11-28 05:06:01,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-28 05:06:01,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-11-28 05:06:01,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 170 transitions. [2024-11-28 05:06:01,462 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3090909090909091 [2024-11-28 05:06:01,462 INFO L175 Difference]: Start difference. First operand has 342 places, 366 transitions, 5817 flow. Second operand 25 states and 170 transitions. [2024-11-28 05:06:01,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 400 transitions, 7073 flow [2024-11-28 05:06:01,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 400 transitions, 6722 flow, removed 120 selfloop flow, removed 11 redundant places. [2024-11-28 05:06:01,826 INFO L231 Difference]: Finished difference. Result has 359 places, 371 transitions, 5842 flow [2024-11-28 05:06:01,827 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=5466, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=5842, PETRI_PLACES=359, PETRI_TRANSITIONS=371} [2024-11-28 05:06:01,827 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 337 predicate places. [2024-11-28 05:06:01,827 INFO L471 AbstractCegarLoop]: Abstraction has has 359 places, 371 transitions, 5842 flow [2024-11-28 05:06:01,827 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 4.636363636363637) internal successors, (153), 33 states have internal predecessors, (153), 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) [2024-11-28 05:06:01,827 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:06:01,827 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:06:01,839 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2024-11-28 05:06:02,028 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:06:02,028 INFO L396 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:06:02,028 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:06:02,028 INFO L85 PathProgramCache]: Analyzing trace with hash -190677255, now seen corresponding path program 68 times [2024-11-28 05:06:02,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:06:02,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015156272] [2024-11-28 05:06:02,029 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:06:02,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:06:02,050 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:06:02,051 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:06:02,757 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-28 05:06:02,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:06:02,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015156272] [2024-11-28 05:06:02,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015156272] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:06:02,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311508532] [2024-11-28 05:06:02,757 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:06:02,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:06:02,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:06:02,759 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:06:02,760 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2024-11-28 05:06:03,111 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:06:03,111 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:06:03,112 INFO L256 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-28 05:06:03,113 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:06:03,239 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:06:03,239 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 23 [2024-11-28 05:06:03,284 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:06:03,284 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:06:03,680 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2024-11-28 05:06:03,680 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 107 [2024-11-28 05:06:03,796 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:06:03,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311508532] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:06:03,797 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:06:03,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 10, 10] total 32 [2024-11-28 05:06:03,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998258349] [2024-11-28 05:06:03,797 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:06:03,797 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-28 05:06:03,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:06:03,797 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-28 05:06:03,798 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2024-11-28 05:06:03,798 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 05:06:03,798 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 371 transitions, 5842 flow. Second operand has 32 states, 32 states have (on average 4.65625) internal successors, (149), 32 states have internal predecessors, (149), 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) [2024-11-28 05:06:03,798 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:06:03,798 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 05:06:03,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:06:05,687 INFO L124 PetriNetUnfolderBase]: 1345/2507 cut-off events. [2024-11-28 05:06:05,687 INFO L125 PetriNetUnfolderBase]: For 111270/111270 co-relation queries the response was YES. [2024-11-28 05:06:05,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26260 conditions, 2507 events. 1345/2507 cut-off events. For 111270/111270 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 15640 event pairs, 341 based on Foata normal form. 3/2508 useless extension candidates. Maximal degree in co-relation 26119. Up to 1857 conditions per place. [2024-11-28 05:06:05,715 INFO L140 encePairwiseOnDemand]: 9/22 looper letters, 296 selfloop transitions, 126 changer transitions 5/428 dead transitions. [2024-11-28 05:06:05,715 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 428 transitions, 7874 flow [2024-11-28 05:06:05,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-28 05:06:05,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-11-28 05:06:05,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 185 transitions. [2024-11-28 05:06:05,716 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.32342657342657344 [2024-11-28 05:06:05,716 INFO L175 Difference]: Start difference. First operand has 359 places, 371 transitions, 5842 flow. Second operand 26 states and 185 transitions. [2024-11-28 05:06:05,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 428 transitions, 7874 flow [2024-11-28 05:06:06,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 428 transitions, 7671 flow, removed 52 selfloop flow, removed 20 redundant places. [2024-11-28 05:06:06,128 INFO L231 Difference]: Finished difference. Result has 369 places, 384 transitions, 6464 flow [2024-11-28 05:06:06,129 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=5648, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=371, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=6464, PETRI_PLACES=369, PETRI_TRANSITIONS=384} [2024-11-28 05:06:06,129 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 347 predicate places. [2024-11-28 05:06:06,129 INFO L471 AbstractCegarLoop]: Abstraction has has 369 places, 384 transitions, 6464 flow [2024-11-28 05:06:06,129 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 4.65625) internal successors, (149), 32 states have internal predecessors, (149), 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) [2024-11-28 05:06:06,129 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:06:06,129 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:06:06,141 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2024-11-28 05:06:06,329 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:06:06,330 INFO L396 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:06:06,330 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:06:06,330 INFO L85 PathProgramCache]: Analyzing trace with hash 2043430239, now seen corresponding path program 69 times [2024-11-28 05:06:06,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:06:06,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520093098] [2024-11-28 05:06:06,330 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 05:06:06,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:06:06,349 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 05:06:06,349 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:06:06,825 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-28 05:06:06,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:06:06,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520093098] [2024-11-28 05:06:06,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520093098] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:06:06,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561290893] [2024-11-28 05:06:06,825 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 05:06:06,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:06:06,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:06:06,830 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:06:06,832 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2024-11-28 05:06:07,183 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 05:06:07,183 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:06:07,185 INFO L256 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-28 05:06:07,185 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:06:07,303 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:06:07,303 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 23 [2024-11-28 05:06:07,346 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:06:07,346 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:06:07,801 INFO L349 Elim1Store]: treesize reduction 15, result has 81.9 percent of original size [2024-11-28 05:06:07,802 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 181 treesize of output 113 [2024-11-28 05:06:07,899 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:06:07,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561290893] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:06:07,899 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:06:07,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 27 [2024-11-28 05:06:07,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681248982] [2024-11-28 05:06:07,900 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:06:07,900 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-28 05:06:07,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:06:07,900 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-28 05:06:07,900 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=617, Unknown=0, NotChecked=0, Total=702 [2024-11-28 05:06:07,900 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 05:06:07,901 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 384 transitions, 6464 flow. Second operand has 27 states, 27 states have (on average 4.814814814814815) internal successors, (130), 27 states have internal predecessors, (130), 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) [2024-11-28 05:06:07,901 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:06:07,901 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 05:06:07,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:06:09,252 INFO L124 PetriNetUnfolderBase]: 1347/2515 cut-off events. [2024-11-28 05:06:09,252 INFO L125 PetriNetUnfolderBase]: For 121237/121237 co-relation queries the response was YES. [2024-11-28 05:06:09,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27236 conditions, 2515 events. 1347/2515 cut-off events. For 121237/121237 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 15739 event pairs, 380 based on Foata normal form. 1/2512 useless extension candidates. Maximal degree in co-relation 27092. Up to 2043 conditions per place. [2024-11-28 05:06:09,282 INFO L140 encePairwiseOnDemand]: 11/22 looper letters, 314 selfloop transitions, 88 changer transitions 1/404 dead transitions. [2024-11-28 05:06:09,282 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 404 transitions, 7492 flow [2024-11-28 05:06:09,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-28 05:06:09,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-28 05:06:09,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 100 transitions. [2024-11-28 05:06:09,283 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3246753246753247 [2024-11-28 05:06:09,283 INFO L175 Difference]: Start difference. First operand has 369 places, 384 transitions, 6464 flow. Second operand 14 states and 100 transitions. [2024-11-28 05:06:09,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 404 transitions, 7492 flow [2024-11-28 05:06:09,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 404 transitions, 7072 flow, removed 157 selfloop flow, removed 19 redundant places. [2024-11-28 05:06:09,749 INFO L231 Difference]: Finished difference. Result has 366 places, 389 transitions, 6370 flow [2024-11-28 05:06:09,749 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=6044, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=6370, PETRI_PLACES=366, PETRI_TRANSITIONS=389} [2024-11-28 05:06:09,750 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 344 predicate places. [2024-11-28 05:06:09,750 INFO L471 AbstractCegarLoop]: Abstraction has has 366 places, 389 transitions, 6370 flow [2024-11-28 05:06:09,750 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.814814814814815) internal successors, (130), 27 states have internal predecessors, (130), 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) [2024-11-28 05:06:09,750 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:06:09,750 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:06:09,757 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2024-11-28 05:06:09,950 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:06:09,951 INFO L396 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:06:09,951 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:06:09,951 INFO L85 PathProgramCache]: Analyzing trace with hash -411316389, now seen corresponding path program 70 times [2024-11-28 05:06:09,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:06:09,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907199937] [2024-11-28 05:06:09,951 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 05:06:09,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:06:09,972 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 05:06:09,973 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:06:10,750 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 1 proven. 25 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-28 05:06:10,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:06:10,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907199937] [2024-11-28 05:06:10,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907199937] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:06:10,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453034669] [2024-11-28 05:06:10,751 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 05:06:10,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:06:10,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:06:10,753 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:06:10,754 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2024-11-28 05:06:11,107 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 05:06:11,107 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:06:11,109 INFO L256 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-28 05:06:11,110 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:06:11,216 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:06:11,216 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 23 [2024-11-28 05:06:11,289 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:06:11,290 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:06:11,676 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2024-11-28 05:06:11,677 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 107 [2024-11-28 05:06:11,816 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:06:11,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453034669] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:06:11,816 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:06:11,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 10, 10] total 33 [2024-11-28 05:06:11,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798582539] [2024-11-28 05:06:11,817 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:06:11,817 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-28 05:06:11,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:06:11,817 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-28 05:06:11,818 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=936, Unknown=0, NotChecked=0, Total=1056 [2024-11-28 05:06:11,818 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 05:06:11,818 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 389 transitions, 6370 flow. Second operand has 33 states, 33 states have (on average 4.636363636363637) internal successors, (153), 33 states have internal predecessors, (153), 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) [2024-11-28 05:06:11,818 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:06:11,818 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 05:06:11,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:06:13,867 INFO L124 PetriNetUnfolderBase]: 1403/2617 cut-off events. [2024-11-28 05:06:13,867 INFO L125 PetriNetUnfolderBase]: For 127198/127198 co-relation queries the response was YES. [2024-11-28 05:06:13,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28545 conditions, 2617 events. 1403/2617 cut-off events. For 127198/127198 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 16513 event pairs, 434 based on Foata normal form. 3/2616 useless extension candidates. Maximal degree in co-relation 28400. Up to 2347 conditions per place. [2024-11-28 05:06:13,893 INFO L140 encePairwiseOnDemand]: 9/22 looper letters, 368 selfloop transitions, 65 changer transitions 5/439 dead transitions. [2024-11-28 05:06:13,894 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 439 transitions, 8343 flow [2024-11-28 05:06:13,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-28 05:06:13,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-11-28 05:06:13,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 170 transitions. [2024-11-28 05:06:13,895 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.32196969696969696 [2024-11-28 05:06:13,895 INFO L175 Difference]: Start difference. First operand has 366 places, 389 transitions, 6370 flow. Second operand 24 states and 170 transitions. [2024-11-28 05:06:13,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 439 transitions, 8343 flow [2024-11-28 05:06:14,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 439 transitions, 8057 flow, removed 64 selfloop flow, removed 10 redundant places. [2024-11-28 05:06:14,486 INFO L231 Difference]: Finished difference. Result has 384 places, 399 transitions, 6664 flow [2024-11-28 05:06:14,487 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=6084, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=6664, PETRI_PLACES=384, PETRI_TRANSITIONS=399} [2024-11-28 05:06:14,487 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 362 predicate places. [2024-11-28 05:06:14,487 INFO L471 AbstractCegarLoop]: Abstraction has has 384 places, 399 transitions, 6664 flow [2024-11-28 05:06:14,487 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 4.636363636363637) internal successors, (153), 33 states have internal predecessors, (153), 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) [2024-11-28 05:06:14,487 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:06:14,487 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:06:14,498 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2024-11-28 05:06:14,687 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2024-11-28 05:06:14,688 INFO L396 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:06:14,688 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:06:14,688 INFO L85 PathProgramCache]: Analyzing trace with hash -2135895073, now seen corresponding path program 71 times [2024-11-28 05:06:14,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:06:14,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619144689] [2024-11-28 05:06:14,688 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 05:06:14,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:06:14,730 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-11-28 05:06:14,730 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:06:15,285 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-28 05:06:15,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:06:15,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619144689] [2024-11-28 05:06:15,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619144689] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:06:15,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093099131] [2024-11-28 05:06:15,286 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 05:06:15,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:06:15,286 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:06:15,288 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:06:15,290 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2024-11-28 05:06:15,986 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-11-28 05:06:15,986 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:06:15,989 INFO L256 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 53 conjuncts are in the unsatisfiable core [2024-11-28 05:06:15,990 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:06:16,060 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 19 treesize of output 1 [2024-11-28 05:06:16,245 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:06:16,246 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2024-11-28 05:06:16,321 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-28 05:06:16,321 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:06:17,355 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:06:17,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093099131] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:06:17,355 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:06:17,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 10] total 35 [2024-11-28 05:06:17,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447444647] [2024-11-28 05:06:17,355 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:06:17,356 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-11-28 05:06:17,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:06:17,356 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-11-28 05:06:17,356 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1052, Unknown=0, NotChecked=0, Total=1190 [2024-11-28 05:06:17,357 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 05:06:17,357 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 399 transitions, 6664 flow. Second operand has 35 states, 35 states have (on average 4.8) internal successors, (168), 35 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:06:17,357 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:06:17,357 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 05:06:17,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:06:19,710 INFO L124 PetriNetUnfolderBase]: 1407/2633 cut-off events. [2024-11-28 05:06:19,710 INFO L125 PetriNetUnfolderBase]: For 135261/135261 co-relation queries the response was YES. [2024-11-28 05:06:19,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28879 conditions, 2633 events. 1407/2633 cut-off events. For 135261/135261 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 16713 event pairs, 454 based on Foata normal form. 2/2631 useless extension candidates. Maximal degree in co-relation 28728. Up to 2361 conditions per place. [2024-11-28 05:06:19,737 INFO L140 encePairwiseOnDemand]: 9/22 looper letters, 365 selfloop transitions, 65 changer transitions 4/435 dead transitions. [2024-11-28 05:06:19,737 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 405 places, 435 transitions, 8042 flow [2024-11-28 05:06:19,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-28 05:06:19,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-11-28 05:06:19,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 155 transitions. [2024-11-28 05:06:19,738 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3202479338842975 [2024-11-28 05:06:19,738 INFO L175 Difference]: Start difference. First operand has 384 places, 399 transitions, 6664 flow. Second operand 22 states and 155 transitions. [2024-11-28 05:06:19,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 405 places, 435 transitions, 8042 flow [2024-11-28 05:06:20,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 435 transitions, 7745 flow, removed 105 selfloop flow, removed 17 redundant places. [2024-11-28 05:06:20,211 INFO L231 Difference]: Finished difference. Result has 391 places, 403 transitions, 6664 flow [2024-11-28 05:06:20,212 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=6367, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=399, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=335, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=6664, PETRI_PLACES=391, PETRI_TRANSITIONS=403} [2024-11-28 05:06:20,212 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 369 predicate places. [2024-11-28 05:06:20,212 INFO L471 AbstractCegarLoop]: Abstraction has has 391 places, 403 transitions, 6664 flow [2024-11-28 05:06:20,212 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 4.8) internal successors, (168), 35 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:06:20,212 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:06:20,212 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:06:20,224 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2024-11-28 05:06:20,413 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2024-11-28 05:06:20,413 INFO L396 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:06:20,413 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:06:20,413 INFO L85 PathProgramCache]: Analyzing trace with hash 102496783, now seen corresponding path program 72 times [2024-11-28 05:06:20,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:06:20,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281326840] [2024-11-28 05:06:20,413 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 05:06:20,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:06:20,452 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-11-28 05:06:20,452 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:06:21,089 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-28 05:06:21,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:06:21,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281326840] [2024-11-28 05:06:21,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281326840] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:06:21,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87182653] [2024-11-28 05:06:21,089 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 05:06:21,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:06:21,090 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:06:21,092 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:06:21,094 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2024-11-28 05:06:21,468 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-11-28 05:06:21,468 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:06:21,470 INFO L256 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-28 05:06:21,471 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:06:21,741 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:06:21,742 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2024-11-28 05:06:21,783 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-28 05:06:21,783 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:06:22,249 INFO L349 Elim1Store]: treesize reduction 15, result has 81.9 percent of original size [2024-11-28 05:06:22,249 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 181 treesize of output 113 [2024-11-28 05:06:22,386 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:06:22,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87182653] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:06:22,386 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:06:22,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 10] total 31 [2024-11-28 05:06:22,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968149416] [2024-11-28 05:06:22,386 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:06:22,387 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-28 05:06:22,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:06:22,387 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-28 05:06:22,387 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=810, Unknown=0, NotChecked=0, Total=930 [2024-11-28 05:06:22,387 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 05:06:22,388 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 391 places, 403 transitions, 6664 flow. Second operand has 31 states, 31 states have (on average 4.870967741935484) internal successors, (151), 31 states have internal predecessors, (151), 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) [2024-11-28 05:06:22,388 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:06:22,388 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 05:06:22,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:06:24,277 INFO L124 PetriNetUnfolderBase]: 1459/2740 cut-off events. [2024-11-28 05:06:24,277 INFO L125 PetriNetUnfolderBase]: For 150002/150002 co-relation queries the response was YES. [2024-11-28 05:06:24,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30386 conditions, 2740 events. 1459/2740 cut-off events. For 150002/150002 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 17668 event pairs, 456 based on Foata normal form. 3/2739 useless extension candidates. Maximal degree in co-relation 30233. Up to 2471 conditions per place. [2024-11-28 05:06:24,310 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 397 selfloop transitions, 56 changer transitions 5/459 dead transitions. [2024-11-28 05:06:24,311 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 459 transitions, 8671 flow [2024-11-28 05:06:24,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-28 05:06:24,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-11-28 05:06:24,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 153 transitions. [2024-11-28 05:06:24,311 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3477272727272727 [2024-11-28 05:06:24,311 INFO L175 Difference]: Start difference. First operand has 391 places, 403 transitions, 6664 flow. Second operand 20 states and 153 transitions. [2024-11-28 05:06:24,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 410 places, 459 transitions, 8671 flow [2024-11-28 05:06:24,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 459 transitions, 8439 flow, removed 75 selfloop flow, removed 17 redundant places. [2024-11-28 05:06:24,998 INFO L231 Difference]: Finished difference. Result has 398 places, 419 transitions, 7146 flow [2024-11-28 05:06:24,998 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=6435, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=403, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=354, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=7146, PETRI_PLACES=398, PETRI_TRANSITIONS=419} [2024-11-28 05:06:24,999 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 376 predicate places. [2024-11-28 05:06:24,999 INFO L471 AbstractCegarLoop]: Abstraction has has 398 places, 419 transitions, 7146 flow [2024-11-28 05:06:24,999 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 4.870967741935484) internal successors, (151), 31 states have internal predecessors, (151), 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) [2024-11-28 05:06:24,999 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:06:24,999 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:06:25,006 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2024-11-28 05:06:25,199 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:06:25,199 INFO L396 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:06:25,200 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:06:25,200 INFO L85 PathProgramCache]: Analyzing trace with hash 126539189, now seen corresponding path program 73 times [2024-11-28 05:06:25,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:06:25,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029467167] [2024-11-28 05:06:25,200 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 05:06:25,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:06:25,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:06:26,163 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 1 proven. 25 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-28 05:06:26,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:06:26,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029467167] [2024-11-28 05:06:26,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029467167] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:06:26,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727337327] [2024-11-28 05:06:26,163 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 05:06:26,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:06:26,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:06:26,165 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:06:26,166 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2024-11-28 05:06:26,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:06:26,531 INFO L256 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-28 05:06:26,533 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:06:26,634 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:06:26,634 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 23 [2024-11-28 05:06:26,707 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:06:26,707 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:06:27,094 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2024-11-28 05:06:27,094 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 107 [2024-11-28 05:06:27,230 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:06:27,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727337327] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:06:27,230 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:06:27,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 10, 10] total 33 [2024-11-28 05:06:27,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82430012] [2024-11-28 05:06:27,230 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:06:27,231 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-28 05:06:27,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:06:27,231 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-28 05:06:27,231 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=928, Unknown=0, NotChecked=0, Total=1056 [2024-11-28 05:06:27,232 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 05:06:27,232 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 398 places, 419 transitions, 7146 flow. Second operand has 33 states, 33 states have (on average 4.636363636363637) internal successors, (153), 33 states have internal predecessors, (153), 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) [2024-11-28 05:06:27,232 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:06:27,232 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 05:06:27,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:06:29,322 INFO L124 PetriNetUnfolderBase]: 1509/2839 cut-off events. [2024-11-28 05:06:29,322 INFO L125 PetriNetUnfolderBase]: For 169512/169512 co-relation queries the response was YES. [2024-11-28 05:06:29,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32193 conditions, 2839 events. 1509/2839 cut-off events. For 169512/169512 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 18470 event pairs, 476 based on Foata normal form. 2/2837 useless extension candidates. Maximal degree in co-relation 32035. Up to 2553 conditions per place. [2024-11-28 05:06:29,362 INFO L140 encePairwiseOnDemand]: 9/22 looper letters, 384 selfloop transitions, 76 changer transitions 6/467 dead transitions. [2024-11-28 05:06:29,362 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 422 places, 467 transitions, 8769 flow [2024-11-28 05:06:29,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-28 05:06:29,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-11-28 05:06:29,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 171 transitions. [2024-11-28 05:06:29,363 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3109090909090909 [2024-11-28 05:06:29,363 INFO L175 Difference]: Start difference. First operand has 398 places, 419 transitions, 7146 flow. Second operand 25 states and 171 transitions. [2024-11-28 05:06:29,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 422 places, 467 transitions, 8769 flow [2024-11-28 05:06:30,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 413 places, 467 transitions, 8384 flow, removed 178 selfloop flow, removed 9 redundant places. [2024-11-28 05:06:30,027 INFO L231 Difference]: Finished difference. Result has 418 places, 430 transitions, 7205 flow [2024-11-28 05:06:30,028 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=6761, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=419, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=7205, PETRI_PLACES=418, PETRI_TRANSITIONS=430} [2024-11-28 05:06:30,028 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 396 predicate places. [2024-11-28 05:06:30,028 INFO L471 AbstractCegarLoop]: Abstraction has has 418 places, 430 transitions, 7205 flow [2024-11-28 05:06:30,028 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 4.636363636363637) internal successors, (153), 33 states have internal predecessors, (153), 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) [2024-11-28 05:06:30,028 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:06:30,028 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:06:30,035 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2024-11-28 05:06:30,228 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:06:30,229 INFO L396 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:06:30,229 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:06:30,229 INFO L85 PathProgramCache]: Analyzing trace with hash -1392067881, now seen corresponding path program 74 times [2024-11-28 05:06:30,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:06:30,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395195437] [2024-11-28 05:06:30,229 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:06:30,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:06:30,263 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:06:30,263 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:06:31,125 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-28 05:06:31,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:06:31,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395195437] [2024-11-28 05:06:31,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395195437] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:06:31,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135494045] [2024-11-28 05:06:31,125 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:06:31,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:06:31,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:06:31,127 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:06:31,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2024-11-28 05:06:31,495 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:06:31,495 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:06:31,497 INFO L256 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-28 05:06:31,498 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:06:31,610 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:06:31,610 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 23 [2024-11-28 05:06:31,629 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:06:31,629 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:06:32,103 INFO L349 Elim1Store]: treesize reduction 15, result has 81.9 percent of original size [2024-11-28 05:06:32,103 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 181 treesize of output 113 [2024-11-28 05:06:32,207 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:06:32,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135494045] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:06:32,207 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:06:32,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 10, 10] total 29 [2024-11-28 05:06:32,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332982922] [2024-11-28 05:06:32,208 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:06:32,208 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-28 05:06:32,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:06:32,208 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-28 05:06:32,209 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=716, Unknown=0, NotChecked=0, Total=812 [2024-11-28 05:06:32,209 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 05:06:32,209 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 430 transitions, 7205 flow. Second operand has 29 states, 29 states have (on average 4.655172413793103) internal successors, (135), 29 states have internal predecessors, (135), 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) [2024-11-28 05:06:32,209 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:06:32,209 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 05:06:32,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:06:33,919 INFO L124 PetriNetUnfolderBase]: 1505/2839 cut-off events. [2024-11-28 05:06:33,919 INFO L125 PetriNetUnfolderBase]: For 174234/174234 co-relation queries the response was YES. [2024-11-28 05:06:33,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32049 conditions, 2839 events. 1505/2839 cut-off events. For 174234/174234 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 18547 event pairs, 420 based on Foata normal form. 1/2836 useless extension candidates. Maximal degree in co-relation 31885. Up to 2344 conditions per place. [2024-11-28 05:06:33,956 INFO L140 encePairwiseOnDemand]: 11/22 looper letters, 336 selfloop transitions, 106 changer transitions 3/446 dead transitions. [2024-11-28 05:06:33,956 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 446 transitions, 8306 flow [2024-11-28 05:06:33,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-28 05:06:33,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-11-28 05:06:33,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 118 transitions. [2024-11-28 05:06:33,957 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.29797979797979796 [2024-11-28 05:06:33,957 INFO L175 Difference]: Start difference. First operand has 418 places, 430 transitions, 7205 flow. Second operand 18 states and 118 transitions. [2024-11-28 05:06:33,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 446 transitions, 8306 flow [2024-11-28 05:06:34,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 446 transitions, 8129 flow, removed 41 selfloop flow, removed 18 redundant places. [2024-11-28 05:06:34,669 INFO L231 Difference]: Finished difference. Result has 418 places, 430 transitions, 7297 flow [2024-11-28 05:06:34,670 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=7028, PETRI_DIFFERENCE_MINUEND_PLACES=400, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=430, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=7297, PETRI_PLACES=418, PETRI_TRANSITIONS=430} [2024-11-28 05:06:34,670 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 396 predicate places. [2024-11-28 05:06:34,670 INFO L471 AbstractCegarLoop]: Abstraction has has 418 places, 430 transitions, 7297 flow [2024-11-28 05:06:34,670 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 4.655172413793103) internal successors, (135), 29 states have internal predecessors, (135), 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) [2024-11-28 05:06:34,670 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:06:34,670 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:06:34,677 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2024-11-28 05:06:34,871 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:06:34,871 INFO L396 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:06:34,871 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:06:34,871 INFO L85 PathProgramCache]: Analyzing trace with hash -1980244931, now seen corresponding path program 75 times [2024-11-28 05:06:34,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:06:34,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056069041] [2024-11-28 05:06:34,871 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 05:06:34,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:06:34,895 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-28 05:06:34,895 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:06:35,325 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-28 05:06:35,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:06:35,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056069041] [2024-11-28 05:06:35,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056069041] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:06:35,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230310855] [2024-11-28 05:06:35,326 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 05:06:35,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:06:35,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:06:35,327 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:06:35,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2024-11-28 05:06:35,699 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-28 05:06:35,699 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:06:35,702 INFO L256 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-28 05:06:35,703 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:06:35,836 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:06:35,836 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2024-11-28 05:06:35,896 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-28 05:06:35,896 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:06:36,253 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2024-11-28 05:06:36,253 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 107 [2024-11-28 05:06:36,386 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:06:36,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230310855] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:06:36,386 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:06:36,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 10] total 27 [2024-11-28 05:06:36,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631670980] [2024-11-28 05:06:36,386 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:06:36,387 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-28 05:06:36,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:06:36,387 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-28 05:06:36,387 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=601, Unknown=0, NotChecked=0, Total=702 [2024-11-28 05:06:36,387 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 05:06:36,387 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 430 transitions, 7297 flow. Second operand has 27 states, 27 states have (on average 4.814814814814815) internal successors, (130), 27 states have internal predecessors, (130), 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) [2024-11-28 05:06:36,387 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:06:36,387 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 05:06:36,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:06:38,109 INFO L124 PetriNetUnfolderBase]: 1510/2858 cut-off events. [2024-11-28 05:06:38,109 INFO L125 PetriNetUnfolderBase]: For 179233/179233 co-relation queries the response was YES. [2024-11-28 05:06:38,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32543 conditions, 2858 events. 1510/2858 cut-off events. For 179233/179233 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 18791 event pairs, 404 based on Foata normal form. 2/2856 useless extension candidates. Maximal degree in co-relation 32378. Up to 2197 conditions per place. [2024-11-28 05:06:38,146 INFO L140 encePairwiseOnDemand]: 11/22 looper letters, 346 selfloop transitions, 119 changer transitions 6/472 dead transitions. [2024-11-28 05:06:38,146 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 472 transitions, 8934 flow [2024-11-28 05:06:38,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-28 05:06:38,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-11-28 05:06:38,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 163 transitions. [2024-11-28 05:06:38,147 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3367768595041322 [2024-11-28 05:06:38,147 INFO L175 Difference]: Start difference. First operand has 418 places, 430 transitions, 7297 flow. Second operand 22 states and 163 transitions. [2024-11-28 05:06:38,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 472 transitions, 8934 flow [2024-11-28 05:06:38,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 421 places, 472 transitions, 8693 flow, removed 17 selfloop flow, removed 18 redundant places. [2024-11-28 05:06:38,878 INFO L231 Difference]: Finished difference. Result has 423 places, 431 transitions, 7419 flow [2024-11-28 05:06:38,879 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=7060, PETRI_DIFFERENCE_MINUEND_PLACES=400, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=430, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=7419, PETRI_PLACES=423, PETRI_TRANSITIONS=431} [2024-11-28 05:06:38,879 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 401 predicate places. [2024-11-28 05:06:38,879 INFO L471 AbstractCegarLoop]: Abstraction has has 423 places, 431 transitions, 7419 flow [2024-11-28 05:06:38,879 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.814814814814815) internal successors, (130), 27 states have internal predecessors, (130), 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) [2024-11-28 05:06:38,879 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:06:38,880 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:06:38,889 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2024-11-28 05:06:39,080 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:06:39,080 INFO L396 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:06:39,081 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:06:39,081 INFO L85 PathProgramCache]: Analyzing trace with hash 1732660303, now seen corresponding path program 76 times [2024-11-28 05:06:39,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:06:39,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201905104] [2024-11-28 05:06:39,081 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 05:06:39,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:06:39,106 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 05:06:39,106 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:06:39,855 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 1 proven. 25 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-28 05:06:39,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:06:39,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201905104] [2024-11-28 05:06:39,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201905104] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:06:39,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091220919] [2024-11-28 05:06:39,855 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 05:06:39,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:06:39,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:06:39,857 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:06:39,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2024-11-28 05:06:40,233 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 05:06:40,233 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:06:40,235 INFO L256 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-28 05:06:40,236 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:06:40,350 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:06:40,350 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 23 [2024-11-28 05:06:40,387 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:06:40,387 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:06:40,828 INFO L349 Elim1Store]: treesize reduction 15, result has 81.9 percent of original size [2024-11-28 05:06:40,828 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 181 treesize of output 113 [2024-11-28 05:06:40,946 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:06:40,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091220919] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:06:40,946 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:06:40,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 10, 10] total 31 [2024-11-28 05:06:40,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155975483] [2024-11-28 05:06:40,946 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:06:40,946 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-28 05:06:40,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:06:40,947 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-28 05:06:40,947 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=817, Unknown=0, NotChecked=0, Total=930 [2024-11-28 05:06:40,947 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 05:06:40,947 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 431 transitions, 7419 flow. Second operand has 31 states, 31 states have (on average 4.612903225806452) internal successors, (143), 31 states have internal predecessors, (143), 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) [2024-11-28 05:06:40,947 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:06:40,947 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 05:06:40,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:06:43,003 INFO L124 PetriNetUnfolderBase]: 1511/2860 cut-off events. [2024-11-28 05:06:43,003 INFO L125 PetriNetUnfolderBase]: For 179830/179830 co-relation queries the response was YES. [2024-11-28 05:06:43,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32748 conditions, 2860 events. 1511/2860 cut-off events. For 179830/179830 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 18815 event pairs, 480 based on Foata normal form. 2/2858 useless extension candidates. Maximal degree in co-relation 32584. Up to 2555 conditions per place. [2024-11-28 05:06:43,042 INFO L140 encePairwiseOnDemand]: 11/22 looper letters, 391 selfloop transitions, 72 changer transitions 2/466 dead transitions. [2024-11-28 05:06:43,042 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 466 transitions, 8979 flow [2024-11-28 05:06:43,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-28 05:06:43,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-11-28 05:06:43,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 161 transitions. [2024-11-28 05:06:43,043 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3181818181818182 [2024-11-28 05:06:43,043 INFO L175 Difference]: Start difference. First operand has 423 places, 431 transitions, 7419 flow. Second operand 23 states and 161 transitions. [2024-11-28 05:06:43,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 466 transitions, 8979 flow [2024-11-28 05:06:43,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 466 transitions, 8698 flow, removed 44 selfloop flow, removed 19 redundant places. [2024-11-28 05:06:43,931 INFO L231 Difference]: Finished difference. Result has 428 places, 433 transitions, 7420 flow [2024-11-28 05:06:43,932 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=7144, PETRI_DIFFERENCE_MINUEND_PLACES=404, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=431, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=359, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=7420, PETRI_PLACES=428, PETRI_TRANSITIONS=433} [2024-11-28 05:06:43,932 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 406 predicate places. [2024-11-28 05:06:43,932 INFO L471 AbstractCegarLoop]: Abstraction has has 428 places, 433 transitions, 7420 flow [2024-11-28 05:06:43,932 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 4.612903225806452) internal successors, (143), 31 states have internal predecessors, (143), 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) [2024-11-28 05:06:43,932 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:06:43,932 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:06:43,944 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2024-11-28 05:06:44,133 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,79 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:06:44,133 INFO L396 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:06:44,133 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:06:44,133 INFO L85 PathProgramCache]: Analyzing trace with hash -1730608892, now seen corresponding path program 77 times [2024-11-28 05:06:44,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:06:44,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255889190] [2024-11-28 05:06:44,134 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 05:06:44,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:06:44,167 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-11-28 05:06:44,167 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:06:44,641 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-28 05:06:44,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:06:44,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255889190] [2024-11-28 05:06:44,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255889190] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:06:44,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9904415] [2024-11-28 05:06:44,641 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 05:06:44,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:06:44,641 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:06:44,643 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:06:44,644 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2024-11-28 05:06:45,057 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-11-28 05:06:45,058 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:06:45,060 INFO L256 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 57 conjuncts are in the unsatisfiable core [2024-11-28 05:06:45,061 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:06:45,075 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-11-28 05:06:45,301 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-11-28 05:06:45,301 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 9 [2024-11-28 05:06:45,330 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-28 05:06:45,330 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:06:45,952 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:06:45,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9904415] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:06:45,952 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:06:45,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 32 [2024-11-28 05:06:45,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567884864] [2024-11-28 05:06:45,952 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:06:45,953 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-28 05:06:45,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:06:45,953 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-28 05:06:45,953 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=890, Unknown=0, NotChecked=0, Total=992 [2024-11-28 05:06:45,953 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 05:06:45,954 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 433 transitions, 7420 flow. Second operand has 32 states, 32 states have (on average 4.875) internal successors, (156), 32 states have internal predecessors, (156), 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) [2024-11-28 05:06:45,954 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:06:45,954 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 05:06:45,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:06:50,093 INFO L124 PetriNetUnfolderBase]: 1726/3245 cut-off events. [2024-11-28 05:06:50,094 INFO L125 PetriNetUnfolderBase]: For 203715/203715 co-relation queries the response was YES. [2024-11-28 05:06:50,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37823 conditions, 3245 events. 1726/3245 cut-off events. For 203715/203715 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 21878 event pairs, 81 based on Foata normal form. 10/3251 useless extension candidates. Maximal degree in co-relation 37656. Up to 785 conditions per place. [2024-11-28 05:06:50,132 INFO L140 encePairwiseOnDemand]: 11/22 looper letters, 390 selfloop transitions, 240 changer transitions 16/647 dead transitions. [2024-11-28 05:06:50,132 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 461 places, 647 transitions, 13054 flow [2024-11-28 05:06:50,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-11-28 05:06:50,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2024-11-28 05:06:50,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 252 transitions. [2024-11-28 05:06:50,133 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.33689839572192515 [2024-11-28 05:06:50,133 INFO L175 Difference]: Start difference. First operand has 428 places, 433 transitions, 7420 flow. Second operand 34 states and 252 transitions. [2024-11-28 05:06:50,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 461 places, 647 transitions, 13054 flow [2024-11-28 05:06:51,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 440 places, 647 transitions, 12857 flow, removed 37 selfloop flow, removed 21 redundant places. [2024-11-28 05:06:51,046 INFO L231 Difference]: Finished difference. Result has 448 places, 474 transitions, 9152 flow [2024-11-28 05:06:51,046 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=7256, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=203, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=9152, PETRI_PLACES=448, PETRI_TRANSITIONS=474} [2024-11-28 05:06:51,047 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 426 predicate places. [2024-11-28 05:06:51,047 INFO L471 AbstractCegarLoop]: Abstraction has has 448 places, 474 transitions, 9152 flow [2024-11-28 05:06:51,047 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 4.875) internal successors, (156), 32 states have internal predecessors, (156), 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) [2024-11-28 05:06:51,047 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:06:51,047 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:06:51,059 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2024-11-28 05:06:51,247 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,80 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:06:51,248 INFO L396 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:06:51,248 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:06:51,248 INFO L85 PathProgramCache]: Analyzing trace with hash 2098033749, now seen corresponding path program 78 times [2024-11-28 05:06:51,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:06:51,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363922180] [2024-11-28 05:06:51,248 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 05:06:51,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:06:51,300 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-11-28 05:06:51,300 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:06:51,982 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-28 05:06:51,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:06:51,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363922180] [2024-11-28 05:06:51,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363922180] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:06:51,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33891608] [2024-11-28 05:06:51,982 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 05:06:51,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:06:51,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:06:51,984 INFO L229 MonitoredProcess]: Starting monitored process 81 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:06:51,985 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2024-11-28 05:06:52,445 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-11-28 05:06:52,445 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:06:52,448 INFO L256 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-11-28 05:06:52,449 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:06:52,857 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:06:52,857 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 30 [2024-11-28 05:06:52,930 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-28 05:06:52,930 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:06:53,186 INFO L349 Elim1Store]: treesize reduction 24, result has 67.1 percent of original size [2024-11-28 05:06:53,186 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 71 [2024-11-28 05:06:53,297 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:06:53,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33891608] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:06:53,297 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:06:53,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 28 [2024-11-28 05:06:53,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947969251] [2024-11-28 05:06:53,297 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:06:53,298 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-28 05:06:53,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:06:53,298 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-28 05:06:53,298 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=650, Unknown=0, NotChecked=0, Total=756 [2024-11-28 05:06:53,298 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 05:06:53,299 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 448 places, 474 transitions, 9152 flow. Second operand has 28 states, 28 states have (on average 4.964285714285714) internal successors, (139), 28 states have internal predecessors, (139), 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) [2024-11-28 05:06:53,299 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:06:53,299 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 05:06:53,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:06:55,426 INFO L124 PetriNetUnfolderBase]: 1732/3260 cut-off events. [2024-11-28 05:06:55,426 INFO L125 PetriNetUnfolderBase]: For 233647/233647 co-relation queries the response was YES. [2024-11-28 05:06:55,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40538 conditions, 3260 events. 1732/3260 cut-off events. For 233647/233647 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 21938 event pairs, 465 based on Foata normal form. 4/3260 useless extension candidates. Maximal degree in co-relation 40366. Up to 1820 conditions per place. [2024-11-28 05:06:55,471 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 377 selfloop transitions, 164 changer transitions 8/550 dead transitions. [2024-11-28 05:06:55,471 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 463 places, 550 transitions, 11716 flow [2024-11-28 05:06:55,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-28 05:06:55,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-28 05:06:55,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 137 transitions. [2024-11-28 05:06:55,472 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3663101604278075 [2024-11-28 05:06:55,472 INFO L175 Difference]: Start difference. First operand has 448 places, 474 transitions, 9152 flow. Second operand 17 states and 137 transitions. [2024-11-28 05:06:55,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 463 places, 550 transitions, 11716 flow [2024-11-28 05:06:56,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 445 places, 550 transitions, 10474 flow, removed 465 selfloop flow, removed 18 redundant places. [2024-11-28 05:06:56,602 INFO L231 Difference]: Finished difference. Result has 445 places, 475 transitions, 8299 flow [2024-11-28 05:06:56,602 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=7920, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=474, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=8299, PETRI_PLACES=445, PETRI_TRANSITIONS=475} [2024-11-28 05:06:56,603 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 423 predicate places. [2024-11-28 05:06:56,603 INFO L471 AbstractCegarLoop]: Abstraction has has 445 places, 475 transitions, 8299 flow [2024-11-28 05:06:56,603 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 4.964285714285714) internal successors, (139), 28 states have internal predecessors, (139), 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) [2024-11-28 05:06:56,603 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:06:56,603 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:06:56,610 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2024-11-28 05:06:56,803 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2024-11-28 05:06:56,803 INFO L396 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:06:56,804 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:06:56,804 INFO L85 PathProgramCache]: Analyzing trace with hash -2080287334, now seen corresponding path program 79 times [2024-11-28 05:06:56,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:06:56,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422951477] [2024-11-28 05:06:56,804 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 05:06:56,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:06:56,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:06:57,543 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-28 05:06:57,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:06:57,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422951477] [2024-11-28 05:06:57,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422951477] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:06:57,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28693402] [2024-11-28 05:06:57,543 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 05:06:57,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:06:57,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:06:57,546 INFO L229 MonitoredProcess]: Starting monitored process 82 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:06:57,547 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2024-11-28 05:06:57,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:06:57,937 INFO L256 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-28 05:06:57,938 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:06:58,104 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-11-28 05:06:58,104 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 9 [2024-11-28 05:06:58,109 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:06:58,109 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:06:58,331 INFO L349 Elim1Store]: treesize reduction 28, result has 61.6 percent of original size [2024-11-28 05:06:58,331 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 52 [2024-11-28 05:06:58,345 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:06:58,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28693402] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:06:58,345 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:06:58,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 9] total 28 [2024-11-28 05:06:58,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844391740] [2024-11-28 05:06:58,345 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:06:58,346 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-28 05:06:58,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:06:58,346 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-28 05:06:58,346 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=660, Unknown=0, NotChecked=0, Total=756 [2024-11-28 05:06:58,346 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 05:06:58,347 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 445 places, 475 transitions, 8299 flow. Second operand has 28 states, 28 states have (on average 4.857142857142857) internal successors, (136), 28 states have internal predecessors, (136), 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) [2024-11-28 05:06:58,347 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:06:58,347 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 05:06:58,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:07:00,240 INFO L124 PetriNetUnfolderBase]: 1753/3296 cut-off events. [2024-11-28 05:07:00,240 INFO L125 PetriNetUnfolderBase]: For 200369/200369 co-relation queries the response was YES. [2024-11-28 05:07:00,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37816 conditions, 3296 events. 1753/3296 cut-off events. For 200369/200369 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 22157 event pairs, 229 based on Foata normal form. 10/3304 useless extension candidates. Maximal degree in co-relation 37647. Up to 1683 conditions per place. [2024-11-28 05:07:00,280 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 356 selfloop transitions, 170 changer transitions 1/528 dead transitions. [2024-11-28 05:07:00,281 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 464 places, 528 transitions, 10393 flow [2024-11-28 05:07:00,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-28 05:07:00,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-11-28 05:07:00,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 145 transitions. [2024-11-28 05:07:00,282 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.32954545454545453 [2024-11-28 05:07:00,282 INFO L175 Difference]: Start difference. First operand has 445 places, 475 transitions, 8299 flow. Second operand 20 states and 145 transitions. [2024-11-28 05:07:00,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 464 places, 528 transitions, 10393 flow [2024-11-28 05:07:01,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 451 places, 528 transitions, 10063 flow, removed 11 selfloop flow, removed 13 redundant places. [2024-11-28 05:07:01,183 INFO L231 Difference]: Finished difference. Result has 452 places, 477 transitions, 8402 flow [2024-11-28 05:07:01,184 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=7969, PETRI_DIFFERENCE_MINUEND_PLACES=432, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=475, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=168, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=8402, PETRI_PLACES=452, PETRI_TRANSITIONS=477} [2024-11-28 05:07:01,184 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 430 predicate places. [2024-11-28 05:07:01,184 INFO L471 AbstractCegarLoop]: Abstraction has has 452 places, 477 transitions, 8402 flow [2024-11-28 05:07:01,184 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 4.857142857142857) internal successors, (136), 28 states have internal predecessors, (136), 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) [2024-11-28 05:07:01,184 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:07:01,184 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:07:01,195 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Ended with exit code 0 [2024-11-28 05:07:01,384 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2024-11-28 05:07:01,385 INFO L396 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:07:01,385 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:07:01,385 INFO L85 PathProgramCache]: Analyzing trace with hash 810158147, now seen corresponding path program 80 times [2024-11-28 05:07:01,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:07:01,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22339744] [2024-11-28 05:07:01,386 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:07:01,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:07:01,415 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:07:01,415 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:07:02,174 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 3 proven. 20 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-28 05:07:02,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:07:02,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22339744] [2024-11-28 05:07:02,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22339744] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:07:02,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150532117] [2024-11-28 05:07:02,175 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:07:02,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:07:02,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:07:02,177 INFO L229 MonitoredProcess]: Starting monitored process 83 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:07:02,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2024-11-28 05:07:02,571 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:07:02,571 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:07:02,573 INFO L256 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-28 05:07:02,574 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:07:02,815 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:07:02,815 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:07:03,043 INFO L349 Elim1Store]: treesize reduction 24, result has 67.1 percent of original size [2024-11-28 05:07:03,043 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 71 [2024-11-28 05:07:03,145 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:07:03,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150532117] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:07:03,145 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:07:03,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 9] total 31 [2024-11-28 05:07:03,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584163788] [2024-11-28 05:07:03,145 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:07:03,146 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-28 05:07:03,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:07:03,146 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-28 05:07:03,146 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=824, Unknown=0, NotChecked=0, Total=930 [2024-11-28 05:07:03,146 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 05:07:03,147 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 452 places, 477 transitions, 8402 flow. Second operand has 31 states, 31 states have (on average 4.741935483870968) internal successors, (147), 31 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:07:03,147 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:07:03,147 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 05:07:03,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:07:05,339 INFO L124 PetriNetUnfolderBase]: 1756/3308 cut-off events. [2024-11-28 05:07:05,339 INFO L125 PetriNetUnfolderBase]: For 206991/206991 co-relation queries the response was YES. [2024-11-28 05:07:05,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38217 conditions, 3308 events. 1756/3308 cut-off events. For 206991/206991 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 22405 event pairs, 472 based on Foata normal form. 3/3309 useless extension candidates. Maximal degree in co-relation 38046. Up to 1856 conditions per place. [2024-11-28 05:07:05,392 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 349 selfloop transitions, 173 changer transitions 19/542 dead transitions. [2024-11-28 05:07:05,392 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 468 places, 542 transitions, 10623 flow [2024-11-28 05:07:05,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-28 05:07:05,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-28 05:07:05,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 123 transitions. [2024-11-28 05:07:05,393 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.32887700534759357 [2024-11-28 05:07:05,393 INFO L175 Difference]: Start difference. First operand has 452 places, 477 transitions, 8402 flow. Second operand 17 states and 123 transitions. [2024-11-28 05:07:05,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 468 places, 542 transitions, 10623 flow [2024-11-28 05:07:06,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 451 places, 542 transitions, 10295 flow, removed 22 selfloop flow, removed 17 redundant places. [2024-11-28 05:07:06,429 INFO L231 Difference]: Finished difference. Result has 454 places, 476 transitions, 8404 flow [2024-11-28 05:07:06,429 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=8079, PETRI_DIFFERENCE_MINUEND_PLACES=435, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=477, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=8404, PETRI_PLACES=454, PETRI_TRANSITIONS=476} [2024-11-28 05:07:06,430 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 432 predicate places. [2024-11-28 05:07:06,430 INFO L471 AbstractCegarLoop]: Abstraction has has 454 places, 476 transitions, 8404 flow [2024-11-28 05:07:06,430 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 4.741935483870968) internal successors, (147), 31 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:07:06,430 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:07:06,430 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:07:06,442 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2024-11-28 05:07:06,630 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2024-11-28 05:07:06,631 INFO L396 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:07:06,631 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:07:06,632 INFO L85 PathProgramCache]: Analyzing trace with hash -1610237956, now seen corresponding path program 81 times [2024-11-28 05:07:06,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:07:06,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136045937] [2024-11-28 05:07:06,632 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 05:07:06,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:07:06,669 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-28 05:07:06,669 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:07:07,151 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-28 05:07:07,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:07:07,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136045937] [2024-11-28 05:07:07,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136045937] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:07:07,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712465323] [2024-11-28 05:07:07,151 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 05:07:07,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:07:07,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:07:07,153 INFO L229 MonitoredProcess]: Starting monitored process 84 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:07:07,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2024-11-28 05:07:07,548 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-28 05:07:07,548 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:07:07,549 INFO L256 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-11-28 05:07:07,550 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:07:07,833 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:07:07,833 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 30 [2024-11-28 05:07:07,926 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-28 05:07:07,927 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:07:08,172 INFO L349 Elim1Store]: treesize reduction 28, result has 61.6 percent of original size [2024-11-28 05:07:08,172 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 52 [2024-11-28 05:07:08,248 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:07:08,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712465323] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:07:08,248 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:07:08,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 26 [2024-11-28 05:07:08,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273836448] [2024-11-28 05:07:08,248 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:07:08,248 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-28 05:07:08,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:07:08,249 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-28 05:07:08,249 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=566, Unknown=0, NotChecked=0, Total=650 [2024-11-28 05:07:08,249 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 05:07:08,249 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 454 places, 476 transitions, 8404 flow. Second operand has 26 states, 26 states have (on average 4.923076923076923) internal successors, (128), 26 states have internal predecessors, (128), 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) [2024-11-28 05:07:08,249 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:07:08,249 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 05:07:08,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:07:11,147 INFO L124 PetriNetUnfolderBase]: 1830/3469 cut-off events. [2024-11-28 05:07:11,147 INFO L125 PetriNetUnfolderBase]: For 231085/231085 co-relation queries the response was YES. [2024-11-28 05:07:11,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41102 conditions, 3469 events. 1830/3469 cut-off events. For 231085/231085 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 23780 event pairs, 235 based on Foata normal form. 15/3482 useless extension candidates. Maximal degree in co-relation 40929. Up to 1625 conditions per place. [2024-11-28 05:07:11,188 INFO L140 encePairwiseOnDemand]: 13/22 looper letters, 402 selfloop transitions, 182 changer transitions 1/586 dead transitions. [2024-11-28 05:07:11,188 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 476 places, 586 transitions, 12225 flow [2024-11-28 05:07:11,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-28 05:07:11,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-11-28 05:07:11,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 212 transitions. [2024-11-28 05:07:11,189 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3706293706293706 [2024-11-28 05:07:11,189 INFO L175 Difference]: Start difference. First operand has 454 places, 476 transitions, 8404 flow. Second operand 26 states and 212 transitions. [2024-11-28 05:07:11,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 476 places, 586 transitions, 12225 flow [2024-11-28 05:07:12,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 461 places, 586 transitions, 11896 flow, removed 3 selfloop flow, removed 15 redundant places. [2024-11-28 05:07:12,229 INFO L231 Difference]: Finished difference. Result has 468 places, 494 transitions, 9314 flow [2024-11-28 05:07:12,230 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=8075, PETRI_DIFFERENCE_MINUEND_PLACES=436, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=476, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=168, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=9314, PETRI_PLACES=468, PETRI_TRANSITIONS=494} [2024-11-28 05:07:12,230 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 446 predicate places. [2024-11-28 05:07:12,230 INFO L471 AbstractCegarLoop]: Abstraction has has 468 places, 494 transitions, 9314 flow [2024-11-28 05:07:12,230 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.923076923076923) internal successors, (128), 26 states have internal predecessors, (128), 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) [2024-11-28 05:07:12,230 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:07:12,230 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:07:12,237 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Ended with exit code 0 [2024-11-28 05:07:12,431 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2024-11-28 05:07:12,431 INFO L396 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:07:12,431 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:07:12,431 INFO L85 PathProgramCache]: Analyzing trace with hash 1396585441, now seen corresponding path program 82 times [2024-11-28 05:07:12,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:07:12,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519787228] [2024-11-28 05:07:12,431 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 05:07:12,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:07:12,454 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 05:07:12,454 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:07:13,269 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-28 05:07:13,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:07:13,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519787228] [2024-11-28 05:07:13,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519787228] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:07:13,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819848236] [2024-11-28 05:07:13,269 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 05:07:13,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:07:13,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:07:13,271 INFO L229 MonitoredProcess]: Starting monitored process 85 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:07:13,272 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2024-11-28 05:07:13,694 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 05:07:13,695 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:07:13,696 INFO L256 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-11-28 05:07:13,698 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:07:14,012 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2024-11-28 05:07:14,012 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 19 [2024-11-28 05:07:14,050 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-28 05:07:14,050 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:07:14,450 INFO L349 Elim1Store]: treesize reduction 24, result has 67.1 percent of original size [2024-11-28 05:07:14,450 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 71 [2024-11-28 05:07:14,555 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:07:14,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1819848236] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:07:14,555 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:07:14,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 10, 11] total 34 [2024-11-28 05:07:14,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448799410] [2024-11-28 05:07:14,555 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:07:14,556 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-11-28 05:07:14,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:07:14,556 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-11-28 05:07:14,556 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1008, Unknown=0, NotChecked=0, Total=1122 [2024-11-28 05:07:14,557 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 05:07:14,557 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 468 places, 494 transitions, 9314 flow. Second operand has 34 states, 34 states have (on average 4.735294117647059) internal successors, (161), 34 states have internal predecessors, (161), 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) [2024-11-28 05:07:14,557 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:07:14,557 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 05:07:14,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:07:16,838 INFO L124 PetriNetUnfolderBase]: 1831/3476 cut-off events. [2024-11-28 05:07:16,838 INFO L125 PetriNetUnfolderBase]: For 257320/257320 co-relation queries the response was YES. [2024-11-28 05:07:16,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42812 conditions, 3476 events. 1831/3476 cut-off events. For 257320/257320 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 23840 event pairs, 288 based on Foata normal form. 3/3477 useless extension candidates. Maximal degree in co-relation 42636. Up to 2017 conditions per place. [2024-11-28 05:07:16,893 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 360 selfloop transitions, 154 changer transitions 10/525 dead transitions. [2024-11-28 05:07:16,893 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 485 places, 525 transitions, 10816 flow [2024-11-28 05:07:16,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-28 05:07:16,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-11-28 05:07:16,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 128 transitions. [2024-11-28 05:07:16,894 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.32323232323232326 [2024-11-28 05:07:16,894 INFO L175 Difference]: Start difference. First operand has 468 places, 494 transitions, 9314 flow. Second operand 18 states and 128 transitions. [2024-11-28 05:07:16,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 485 places, 525 transitions, 10816 flow [2024-11-28 05:07:18,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 471 places, 525 transitions, 10030 flow, removed 233 selfloop flow, removed 14 redundant places. [2024-11-28 05:07:18,238 INFO L231 Difference]: Finished difference. Result has 473 places, 492 transitions, 8814 flow [2024-11-28 05:07:18,238 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=8531, PETRI_DIFFERENCE_MINUEND_PLACES=454, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=494, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=8814, PETRI_PLACES=473, PETRI_TRANSITIONS=492} [2024-11-28 05:07:18,239 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 451 predicate places. [2024-11-28 05:07:18,239 INFO L471 AbstractCegarLoop]: Abstraction has has 473 places, 492 transitions, 8814 flow [2024-11-28 05:07:18,239 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.735294117647059) internal successors, (161), 34 states have internal predecessors, (161), 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) [2024-11-28 05:07:18,239 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:07:18,239 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:07:18,247 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Ended with exit code 0 [2024-11-28 05:07:18,439 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,85 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:07:18,440 INFO L396 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:07:18,441 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:07:18,441 INFO L85 PathProgramCache]: Analyzing trace with hash -465593480, now seen corresponding path program 83 times [2024-11-28 05:07:18,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:07:18,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072806566] [2024-11-28 05:07:18,441 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 05:07:18,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:07:18,472 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-11-28 05:07:18,472 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:07:18,980 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-28 05:07:18,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:07:18,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072806566] [2024-11-28 05:07:18,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072806566] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:07:18,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537455318] [2024-11-28 05:07:18,980 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 05:07:18,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:07:18,980 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:07:18,982 INFO L229 MonitoredProcess]: Starting monitored process 86 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:07:18,984 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2024-11-28 05:07:19,453 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-11-28 05:07:19,453 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:07:19,456 INFO L256 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-28 05:07:19,457 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:07:19,763 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-11-28 05:07:19,763 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2024-11-28 05:07:19,768 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-28 05:07:19,768 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:07:19,975 INFO L349 Elim1Store]: treesize reduction 28, result has 61.6 percent of original size [2024-11-28 05:07:19,975 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 52 [2024-11-28 05:07:20,022 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:07:20,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537455318] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:07:20,022 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:07:20,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 9] total 29 [2024-11-28 05:07:20,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952485165] [2024-11-28 05:07:20,022 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:07:20,022 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-28 05:07:20,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:07:20,023 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-28 05:07:20,023 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=702, Unknown=0, NotChecked=0, Total=812 [2024-11-28 05:07:20,023 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 05:07:20,023 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 473 places, 492 transitions, 8814 flow. Second operand has 29 states, 29 states have (on average 5.0344827586206895) internal successors, (146), 29 states have internal predecessors, (146), 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) [2024-11-28 05:07:20,023 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:07:20,023 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 05:07:20,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:07:21,900 INFO L124 PetriNetUnfolderBase]: 1850/3484 cut-off events. [2024-11-28 05:07:21,900 INFO L125 PetriNetUnfolderBase]: For 239231/239231 co-relation queries the response was YES. [2024-11-28 05:07:21,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41649 conditions, 3484 events. 1850/3484 cut-off events. For 239231/239231 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 23737 event pairs, 236 based on Foata normal form. 10/3492 useless extension candidates. Maximal degree in co-relation 41469. Up to 1784 conditions per place. [2024-11-28 05:07:21,950 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 375 selfloop transitions, 174 changer transitions 1/551 dead transitions. [2024-11-28 05:07:21,950 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 483 places, 551 transitions, 11034 flow [2024-11-28 05:07:21,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-28 05:07:21,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-11-28 05:07:21,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 144 transitions. [2024-11-28 05:07:21,951 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3444976076555024 [2024-11-28 05:07:21,951 INFO L175 Difference]: Start difference. First operand has 473 places, 492 transitions, 8814 flow. Second operand 19 states and 144 transitions. [2024-11-28 05:07:21,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 483 places, 551 transitions, 11034 flow [2024-11-28 05:07:23,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 465 places, 551 transitions, 10702 flow, removed 12 selfloop flow, removed 18 redundant places. [2024-11-28 05:07:23,067 INFO L231 Difference]: Finished difference. Result has 467 places, 495 transitions, 8951 flow [2024-11-28 05:07:23,067 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=8411, PETRI_DIFFERENCE_MINUEND_PLACES=447, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=487, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=166, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=313, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=8951, PETRI_PLACES=467, PETRI_TRANSITIONS=495} [2024-11-28 05:07:23,068 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 445 predicate places. [2024-11-28 05:07:23,068 INFO L471 AbstractCegarLoop]: Abstraction has has 467 places, 495 transitions, 8951 flow [2024-11-28 05:07:23,068 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 5.0344827586206895) internal successors, (146), 29 states have internal predecessors, (146), 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) [2024-11-28 05:07:23,068 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:07:23,068 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:07:23,075 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Ended with exit code 0 [2024-11-28 05:07:23,268 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,86 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:07:23,269 INFO L396 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:07:23,269 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:07:23,269 INFO L85 PathProgramCache]: Analyzing trace with hash 467870229, now seen corresponding path program 84 times [2024-11-28 05:07:23,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:07:23,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309579774] [2024-11-28 05:07:23,269 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 05:07:23,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:07:23,292 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-28 05:07:23,292 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:07:23,735 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-28 05:07:23,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:07:23,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309579774] [2024-11-28 05:07:23,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309579774] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:07:23,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115377801] [2024-11-28 05:07:23,736 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 05:07:23,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:07:23,736 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:07:23,737 INFO L229 MonitoredProcess]: Starting monitored process 87 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:07:23,738 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2024-11-28 05:07:24,135 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-28 05:07:24,135 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:07:24,137 INFO L256 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-28 05:07:24,138 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:07:24,495 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:07:24,495 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 41 [2024-11-28 05:07:24,555 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-28 05:07:24,555 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:07:24,796 INFO L349 Elim1Store]: treesize reduction 24, result has 67.1 percent of original size [2024-11-28 05:07:24,796 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 71 [2024-11-28 05:07:24,895 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:07:24,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115377801] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:07:24,895 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:07:24,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 28 [2024-11-28 05:07:24,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462194170] [2024-11-28 05:07:24,896 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:07:24,896 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-28 05:07:24,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:07:24,896 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-28 05:07:24,896 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=662, Unknown=0, NotChecked=0, Total=756 [2024-11-28 05:07:24,897 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 05:07:24,897 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 467 places, 495 transitions, 8951 flow. Second operand has 28 states, 28 states have (on average 4.964285714285714) internal successors, (139), 28 states have internal predecessors, (139), 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) [2024-11-28 05:07:24,897 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:07:24,897 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 05:07:24,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:07:27,269 INFO L124 PetriNetUnfolderBase]: 1849/3486 cut-off events. [2024-11-28 05:07:27,270 INFO L125 PetriNetUnfolderBase]: For 240584/240584 co-relation queries the response was YES. [2024-11-28 05:07:27,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41755 conditions, 3486 events. 1849/3486 cut-off events. For 240584/240584 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 23938 event pairs, 518 based on Foata normal form. 3/3487 useless extension candidates. Maximal degree in co-relation 41578. Up to 2051 conditions per place. [2024-11-28 05:07:27,335 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 396 selfloop transitions, 160 changer transitions 13/570 dead transitions. [2024-11-28 05:07:27,335 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 483 places, 570 transitions, 11550 flow [2024-11-28 05:07:27,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-28 05:07:27,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-28 05:07:27,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 134 transitions. [2024-11-28 05:07:27,336 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3582887700534759 [2024-11-28 05:07:27,336 INFO L175 Difference]: Start difference. First operand has 467 places, 495 transitions, 8951 flow. Second operand 17 states and 134 transitions. [2024-11-28 05:07:27,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 483 places, 570 transitions, 11550 flow [2024-11-28 05:07:28,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 468 places, 570 transitions, 11210 flow, removed 5 selfloop flow, removed 15 redundant places. [2024-11-28 05:07:28,605 INFO L231 Difference]: Finished difference. Result has 468 places, 494 transitions, 8926 flow [2024-11-28 05:07:28,605 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=8611, PETRI_DIFFERENCE_MINUEND_PLACES=452, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=495, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=335, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=8926, PETRI_PLACES=468, PETRI_TRANSITIONS=494} [2024-11-28 05:07:28,606 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 446 predicate places. [2024-11-28 05:07:28,606 INFO L471 AbstractCegarLoop]: Abstraction has has 468 places, 494 transitions, 8926 flow [2024-11-28 05:07:28,606 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 4.964285714285714) internal successors, (139), 28 states have internal predecessors, (139), 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) [2024-11-28 05:07:28,606 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:07:28,606 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:07:28,629 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Ended with exit code 0 [2024-11-28 05:07:28,806 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,87 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:07:28,807 INFO L396 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:07:28,808 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:07:28,808 INFO L85 PathProgramCache]: Analyzing trace with hash 1032852436, now seen corresponding path program 85 times [2024-11-28 05:07:28,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:07:28,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321698728] [2024-11-28 05:07:28,808 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 05:07:28,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:07:28,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:07:29,571 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-28 05:07:29,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:07:29,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321698728] [2024-11-28 05:07:29,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321698728] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:07:29,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520275457] [2024-11-28 05:07:29,571 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 05:07:29,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:07:29,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:07:29,573 INFO L229 MonitoredProcess]: Starting monitored process 88 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:07:29,574 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2024-11-28 05:07:29,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:07:29,984 INFO L256 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-28 05:07:29,985 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:07:30,131 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:07:30,131 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 34 [2024-11-28 05:07:30,206 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:07:30,206 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:07:30,432 INFO L349 Elim1Store]: treesize reduction 28, result has 61.6 percent of original size [2024-11-28 05:07:30,432 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 52 [2024-11-28 05:07:30,448 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:07:30,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520275457] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:07:30,449 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:07:30,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 9] total 29 [2024-11-28 05:07:30,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454263665] [2024-11-28 05:07:30,449 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:07:30,449 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-28 05:07:30,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:07:30,450 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-28 05:07:30,450 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=704, Unknown=0, NotChecked=0, Total=812 [2024-11-28 05:07:30,450 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 05:07:30,450 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 468 places, 494 transitions, 8926 flow. Second operand has 29 states, 29 states have (on average 4.620689655172414) internal successors, (134), 29 states have internal predecessors, (134), 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) [2024-11-28 05:07:30,450 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:07:30,450 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 05:07:30,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:07:32,525 INFO L124 PetriNetUnfolderBase]: 1840/3450 cut-off events. [2024-11-28 05:07:32,525 INFO L125 PetriNetUnfolderBase]: For 234927/234927 co-relation queries the response was YES. [2024-11-28 05:07:32,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41388 conditions, 3450 events. 1840/3450 cut-off events. For 234927/234927 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 23380 event pairs, 235 based on Foata normal form. 2/3450 useless extension candidates. Maximal degree in co-relation 41211. Up to 1655 conditions per place. [2024-11-28 05:07:32,572 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 343 selfloop transitions, 190 changer transitions 3/537 dead transitions. [2024-11-28 05:07:32,572 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 484 places, 537 transitions, 10809 flow [2024-11-28 05:07:32,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-28 05:07:32,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-11-28 05:07:32,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 155 transitions. [2024-11-28 05:07:32,573 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3202479338842975 [2024-11-28 05:07:32,573 INFO L175 Difference]: Start difference. First operand has 468 places, 494 transitions, 8926 flow. Second operand 22 states and 155 transitions. [2024-11-28 05:07:32,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 484 places, 537 transitions, 10809 flow [2024-11-28 05:07:33,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 469 places, 537 transitions, 10500 flow, removed 6 selfloop flow, removed 15 redundant places. [2024-11-28 05:07:33,679 INFO L231 Difference]: Finished difference. Result has 469 places, 489 transitions, 8948 flow [2024-11-28 05:07:33,679 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=8573, PETRI_DIFFERENCE_MINUEND_PLACES=448, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=490, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=190, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=8948, PETRI_PLACES=469, PETRI_TRANSITIONS=489} [2024-11-28 05:07:33,680 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 447 predicate places. [2024-11-28 05:07:33,680 INFO L471 AbstractCegarLoop]: Abstraction has has 469 places, 489 transitions, 8948 flow [2024-11-28 05:07:33,680 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 4.620689655172414) internal successors, (134), 29 states have internal predecessors, (134), 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) [2024-11-28 05:07:33,680 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:07:33,680 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:07:33,692 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Ended with exit code 0 [2024-11-28 05:07:33,880 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2024-11-28 05:07:33,881 INFO L396 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:07:33,881 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:07:33,881 INFO L85 PathProgramCache]: Analyzing trace with hash -1408976859, now seen corresponding path program 86 times [2024-11-28 05:07:33,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:07:33,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393609237] [2024-11-28 05:07:33,881 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:07:33,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:07:33,903 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:07:33,904 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:07:34,685 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 3 proven. 20 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-28 05:07:34,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:07:34,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393609237] [2024-11-28 05:07:34,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393609237] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:07:34,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765769453] [2024-11-28 05:07:34,685 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:07:34,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:07:34,685 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:07:34,687 INFO L229 MonitoredProcess]: Starting monitored process 89 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:07:34,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2024-11-28 05:07:35,125 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:07:35,125 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:07:35,133 INFO L256 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-28 05:07:35,135 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:07:35,448 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:07:35,448 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:07:35,696 INFO L349 Elim1Store]: treesize reduction 24, result has 67.1 percent of original size [2024-11-28 05:07:35,697 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 71 [2024-11-28 05:07:35,800 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:07:35,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765769453] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:07:35,800 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:07:35,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 9] total 31 [2024-11-28 05:07:35,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504694182] [2024-11-28 05:07:35,801 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:07:35,801 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-28 05:07:35,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:07:35,801 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-28 05:07:35,801 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=828, Unknown=0, NotChecked=0, Total=930 [2024-11-28 05:07:35,802 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 05:07:35,802 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 469 places, 489 transitions, 8948 flow. Second operand has 31 states, 31 states have (on average 4.67741935483871) internal successors, (145), 31 states have internal predecessors, (145), 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) [2024-11-28 05:07:35,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:07:35,802 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 05:07:35,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:07:38,286 INFO L124 PetriNetUnfolderBase]: 1832/3431 cut-off events. [2024-11-28 05:07:38,286 INFO L125 PetriNetUnfolderBase]: For 232399/232399 co-relation queries the response was YES. [2024-11-28 05:07:38,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41171 conditions, 3431 events. 1832/3431 cut-off events. For 232399/232399 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 23287 event pairs, 517 based on Foata normal form. 3/3432 useless extension candidates. Maximal degree in co-relation 40995. Up to 2022 conditions per place. [2024-11-28 05:07:38,365 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 359 selfloop transitions, 174 changer transitions 16/550 dead transitions. [2024-11-28 05:07:38,365 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 483 places, 550 transitions, 11074 flow [2024-11-28 05:07:38,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-28 05:07:38,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-11-28 05:07:38,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 134 transitions. [2024-11-28 05:07:38,366 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.32057416267942584 [2024-11-28 05:07:38,366 INFO L175 Difference]: Start difference. First operand has 469 places, 489 transitions, 8948 flow. Second operand 19 states and 134 transitions. [2024-11-28 05:07:38,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 483 places, 550 transitions, 11074 flow [2024-11-28 05:07:39,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 463 places, 550 transitions, 10696 flow, removed 0 selfloop flow, removed 20 redundant places. [2024-11-28 05:07:39,574 INFO L231 Difference]: Finished difference. Result has 463 places, 486 transitions, 8884 flow [2024-11-28 05:07:39,574 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=8560, PETRI_DIFFERENCE_MINUEND_PLACES=445, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=488, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=174, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=8884, PETRI_PLACES=463, PETRI_TRANSITIONS=486} [2024-11-28 05:07:39,575 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 441 predicate places. [2024-11-28 05:07:39,575 INFO L471 AbstractCegarLoop]: Abstraction has has 463 places, 486 transitions, 8884 flow [2024-11-28 05:07:39,575 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 4.67741935483871) internal successors, (145), 31 states have internal predecessors, (145), 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) [2024-11-28 05:07:39,575 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:07:39,575 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:07:39,583 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Ended with exit code 0 [2024-11-28 05:07:39,775 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable94 [2024-11-28 05:07:39,775 INFO L396 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:07:39,776 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:07:39,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1771780822, now seen corresponding path program 87 times [2024-11-28 05:07:39,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:07:39,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318211773] [2024-11-28 05:07:39,776 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 05:07:39,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:07:39,797 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 05:07:39,797 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:07:40,175 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-28 05:07:40,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:07:40,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318211773] [2024-11-28 05:07:40,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318211773] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:07:40,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759128182] [2024-11-28 05:07:40,176 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 05:07:40,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:07:40,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:07:40,177 INFO L229 MonitoredProcess]: Starting monitored process 90 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:07:40,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2024-11-28 05:07:40,583 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 05:07:40,583 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:07:40,584 INFO L256 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-28 05:07:40,585 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:07:40,760 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-11-28 05:07:40,760 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 9 [2024-11-28 05:07:40,782 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:07:40,782 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:07:40,976 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-11-28 05:07:40,976 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 83 [2024-11-28 05:07:41,101 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:07:41,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759128182] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:07:41,101 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:07:41,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 26 [2024-11-28 05:07:41,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997134254] [2024-11-28 05:07:41,102 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:07:41,102 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-28 05:07:41,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:07:41,102 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-28 05:07:41,103 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=574, Unknown=0, NotChecked=0, Total=650 [2024-11-28 05:07:41,103 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 05:07:41,103 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 463 places, 486 transitions, 8884 flow. Second operand has 26 states, 26 states have (on average 5.0) internal successors, (130), 26 states have internal predecessors, (130), 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) [2024-11-28 05:07:41,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:07:41,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 05:07:41,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:07:42,740 INFO L124 PetriNetUnfolderBase]: 1850/3458 cut-off events. [2024-11-28 05:07:42,740 INFO L125 PetriNetUnfolderBase]: For 239969/239969 co-relation queries the response was YES. [2024-11-28 05:07:42,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41718 conditions, 3458 events. 1850/3458 cut-off events. For 239969/239969 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 23396 event pairs, 763 based on Foata normal form. 10/3466 useless extension candidates. Maximal degree in co-relation 41542. Up to 2978 conditions per place. [2024-11-28 05:07:42,783 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 435 selfloop transitions, 81 changer transitions 0/517 dead transitions. [2024-11-28 05:07:42,783 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 469 places, 517 transitions, 10526 flow [2024-11-28 05:07:42,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-28 05:07:42,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-28 05:07:42,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 89 transitions. [2024-11-28 05:07:42,783 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3677685950413223 [2024-11-28 05:07:42,784 INFO L175 Difference]: Start difference. First operand has 463 places, 486 transitions, 8884 flow. Second operand 11 states and 89 transitions. [2024-11-28 05:07:42,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 469 places, 517 transitions, 10526 flow [2024-11-28 05:07:43,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 454 places, 517 transitions, 10197 flow, removed 0 selfloop flow, removed 15 redundant places. [2024-11-28 05:07:43,891 INFO L231 Difference]: Finished difference. Result has 456 places, 488 transitions, 8815 flow [2024-11-28 05:07:43,891 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=8556, PETRI_DIFFERENCE_MINUEND_PLACES=444, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=486, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8815, PETRI_PLACES=456, PETRI_TRANSITIONS=488} [2024-11-28 05:07:43,891 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 434 predicate places. [2024-11-28 05:07:43,891 INFO L471 AbstractCegarLoop]: Abstraction has has 456 places, 488 transitions, 8815 flow [2024-11-28 05:07:43,891 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 5.0) internal successors, (130), 26 states have internal predecessors, (130), 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) [2024-11-28 05:07:43,892 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:07:43,892 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:07:43,899 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Ended with exit code 0 [2024-11-28 05:07:44,092 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,90 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:07:44,092 INFO L396 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:07:44,093 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:07:44,093 INFO L85 PathProgramCache]: Analyzing trace with hash 1145943419, now seen corresponding path program 88 times [2024-11-28 05:07:44,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:07:44,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030596342] [2024-11-28 05:07:44,093 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 05:07:44,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:07:44,117 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 05:07:44,117 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:07:44,808 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 2 proven. 25 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-28 05:07:44,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:07:44,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030596342] [2024-11-28 05:07:44,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030596342] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:07:44,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310259387] [2024-11-28 05:07:44,808 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 05:07:44,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:07:44,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:07:44,810 INFO L229 MonitoredProcess]: Starting monitored process 91 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:07:44,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2024-11-28 05:07:45,231 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 05:07:45,231 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:07:45,232 INFO L256 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-28 05:07:45,234 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:07:45,470 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-11-28 05:07:45,471 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 9 [2024-11-28 05:07:45,528 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-28 05:07:45,529 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:07:45,971 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-11-28 05:07:45,971 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2024-11-28 05:07:46,119 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:07:46,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [310259387] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:07:46,119 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:07:46,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 10, 11] total 34 [2024-11-28 05:07:46,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023236104] [2024-11-28 05:07:46,119 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:07:46,119 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-11-28 05:07:46,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:07:46,120 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-11-28 05:07:46,120 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1006, Unknown=0, NotChecked=0, Total=1122 [2024-11-28 05:07:46,120 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 05:07:46,120 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 456 places, 488 transitions, 8815 flow. Second operand has 34 states, 34 states have (on average 4.735294117647059) internal successors, (161), 34 states have internal predecessors, (161), 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) [2024-11-28 05:07:46,120 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:07:46,120 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 05:07:46,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:07:49,383 INFO L124 PetriNetUnfolderBase]: 1902/3558 cut-off events. [2024-11-28 05:07:49,383 INFO L125 PetriNetUnfolderBase]: For 260613/260613 co-relation queries the response was YES. [2024-11-28 05:07:49,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43890 conditions, 3558 events. 1902/3558 cut-off events. For 260613/260613 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 24187 event pairs, 294 based on Foata normal form. 11/3567 useless extension candidates. Maximal degree in co-relation 43713. Up to 2965 conditions per place. [2024-11-28 05:07:49,444 INFO L140 encePairwiseOnDemand]: 10/22 looper letters, 430 selfloop transitions, 130 changer transitions 7/568 dead transitions. [2024-11-28 05:07:49,444 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 487 places, 568 transitions, 12130 flow [2024-11-28 05:07:49,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-11-28 05:07:49,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2024-11-28 05:07:49,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 234 transitions. [2024-11-28 05:07:49,445 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.33238636363636365 [2024-11-28 05:07:49,445 INFO L175 Difference]: Start difference. First operand has 456 places, 488 transitions, 8815 flow. Second operand 32 states and 234 transitions. [2024-11-28 05:07:49,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 487 places, 568 transitions, 12130 flow [2024-11-28 05:07:50,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 476 places, 568 transitions, 11894 flow, removed 26 selfloop flow, removed 11 redundant places. [2024-11-28 05:07:50,729 INFO L231 Difference]: Finished difference. Result has 484 places, 504 transitions, 9575 flow [2024-11-28 05:07:50,730 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=8583, PETRI_DIFFERENCE_MINUEND_PLACES=445, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=488, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=368, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=9575, PETRI_PLACES=484, PETRI_TRANSITIONS=504} [2024-11-28 05:07:50,730 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 462 predicate places. [2024-11-28 05:07:50,730 INFO L471 AbstractCegarLoop]: Abstraction has has 484 places, 504 transitions, 9575 flow [2024-11-28 05:07:50,730 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.735294117647059) internal successors, (161), 34 states have internal predecessors, (161), 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) [2024-11-28 05:07:50,730 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:07:50,730 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:07:50,741 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0 [2024-11-28 05:07:50,931 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,91 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:07:50,931 INFO L396 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:07:50,931 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:07:50,931 INFO L85 PathProgramCache]: Analyzing trace with hash 38957593, now seen corresponding path program 89 times [2024-11-28 05:07:50,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:07:50,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587969022] [2024-11-28 05:07:50,932 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 05:07:50,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:07:50,967 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-11-28 05:07:50,967 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:07:51,489 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-28 05:07:51,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:07:51,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587969022] [2024-11-28 05:07:51,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587969022] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:07:51,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780552850] [2024-11-28 05:07:51,490 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 05:07:51,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:07:51,490 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:07:51,491 INFO L229 MonitoredProcess]: Starting monitored process 92 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:07:51,492 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2024-11-28 05:07:52,018 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-11-28 05:07:52,019 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:07:52,021 INFO L256 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-28 05:07:52,022 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:07:52,211 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:07:52,211 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 45 [2024-11-28 05:07:52,266 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-28 05:07:52,266 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:07:52,432 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-11-28 05:07:52,432 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2024-11-28 05:07:52,555 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:07:52,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [780552850] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:07:52,555 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:07:52,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 9] total 31 [2024-11-28 05:07:52,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403339831] [2024-11-28 05:07:52,556 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:07:52,556 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-28 05:07:52,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:07:52,556 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-28 05:07:52,556 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=827, Unknown=0, NotChecked=0, Total=930 [2024-11-28 05:07:52,557 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 05:07:52,557 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 484 places, 504 transitions, 9575 flow. Second operand has 31 states, 31 states have (on average 4.935483870967742) internal successors, (153), 31 states have internal predecessors, (153), 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) [2024-11-28 05:07:52,557 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:07:52,557 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 05:07:52,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:07:54,872 INFO L124 PetriNetUnfolderBase]: 1917/3611 cut-off events. [2024-11-28 05:07:54,873 INFO L125 PetriNetUnfolderBase]: For 307502/307502 co-relation queries the response was YES. [2024-11-28 05:07:54,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46224 conditions, 3611 events. 1917/3611 cut-off events. For 307502/307502 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 24838 event pairs, 740 based on Foata normal form. 15/3624 useless extension candidates. Maximal degree in co-relation 46041. Up to 2918 conditions per place. [2024-11-28 05:07:54,935 INFO L140 encePairwiseOnDemand]: 11/22 looper letters, 443 selfloop transitions, 120 changer transitions 9/573 dead transitions. [2024-11-28 05:07:54,935 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 508 places, 573 transitions, 12705 flow [2024-11-28 05:07:54,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-28 05:07:54,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-11-28 05:07:54,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 194 transitions. [2024-11-28 05:07:54,936 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3527272727272727 [2024-11-28 05:07:54,936 INFO L175 Difference]: Start difference. First operand has 484 places, 504 transitions, 9575 flow. Second operand 25 states and 194 transitions. [2024-11-28 05:07:54,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 508 places, 573 transitions, 12705 flow [2024-11-28 05:07:56,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 486 places, 573 transitions, 12035 flow, removed 243 selfloop flow, removed 22 redundant places. [2024-11-28 05:07:56,480 INFO L231 Difference]: Finished difference. Result has 491 places, 507 transitions, 9309 flow [2024-11-28 05:07:56,480 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=8852, PETRI_DIFFERENCE_MINUEND_PLACES=462, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=503, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=383, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=9309, PETRI_PLACES=491, PETRI_TRANSITIONS=507} [2024-11-28 05:07:56,480 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 469 predicate places. [2024-11-28 05:07:56,481 INFO L471 AbstractCegarLoop]: Abstraction has has 491 places, 507 transitions, 9309 flow [2024-11-28 05:07:56,481 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 4.935483870967742) internal successors, (153), 31 states have internal predecessors, (153), 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) [2024-11-28 05:07:56,481 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:07:56,481 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:07:56,488 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Ended with exit code 0 [2024-11-28 05:07:56,681 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,92 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:07:56,681 INFO L396 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:07:56,682 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:07:56,682 INFO L85 PathProgramCache]: Analyzing trace with hash 1618949023, now seen corresponding path program 90 times [2024-11-28 05:07:56,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:07:56,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935787023] [2024-11-28 05:07:56,682 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 05:07:56,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:07:56,707 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-28 05:07:56,708 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:07:57,123 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-28 05:07:57,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:07:57,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935787023] [2024-11-28 05:07:57,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935787023] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:07:57,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217622921] [2024-11-28 05:07:57,123 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 05:07:57,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:07:57,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:07:57,125 INFO L229 MonitoredProcess]: Starting monitored process 93 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:07:57,126 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2024-11-28 05:07:57,546 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-28 05:07:57,546 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:07:57,547 INFO L256 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-28 05:07:57,548 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:07:57,892 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-28 05:07:57,892 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:07:58,073 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-11-28 05:07:58,073 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 73 treesize of output 94 [2024-11-28 05:07:58,219 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:07:58,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217622921] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:07:58,219 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:07:58,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 28 [2024-11-28 05:07:58,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092865176] [2024-11-28 05:07:58,219 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:07:58,219 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-28 05:07:58,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:07:58,220 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-28 05:07:58,220 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=663, Unknown=0, NotChecked=0, Total=756 [2024-11-28 05:07:58,220 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 05:07:58,220 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 491 places, 507 transitions, 9309 flow. Second operand has 28 states, 28 states have (on average 4.964285714285714) internal successors, (139), 28 states have internal predecessors, (139), 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) [2024-11-28 05:07:58,220 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:07:58,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 05:07:58,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:08:00,116 INFO L124 PetriNetUnfolderBase]: 1909/3596 cut-off events. [2024-11-28 05:08:00,116 INFO L125 PetriNetUnfolderBase]: For 298998/298998 co-relation queries the response was YES. [2024-11-28 05:08:00,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45531 conditions, 3596 events. 1909/3596 cut-off events. For 298998/298998 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 24752 event pairs, 813 based on Foata normal form. 3/3597 useless extension candidates. Maximal degree in co-relation 45346. Up to 3164 conditions per place. [2024-11-28 05:08:00,162 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 436 selfloop transitions, 81 changer transitions 9/527 dead transitions. [2024-11-28 05:08:00,162 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 501 places, 527 transitions, 10642 flow [2024-11-28 05:08:00,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-28 05:08:00,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-28 05:08:00,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 87 transitions. [2024-11-28 05:08:00,163 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.32954545454545453 [2024-11-28 05:08:00,163 INFO L175 Difference]: Start difference. First operand has 491 places, 507 transitions, 9309 flow. Second operand 12 states and 87 transitions. [2024-11-28 05:08:00,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 501 places, 527 transitions, 10642 flow [2024-11-28 05:08:01,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 479 places, 527 transitions, 10249 flow, removed 38 selfloop flow, removed 22 redundant places. [2024-11-28 05:08:01,564 INFO L231 Difference]: Finished difference. Result has 482 places, 507 transitions, 9091 flow [2024-11-28 05:08:01,564 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=8920, PETRI_DIFFERENCE_MINUEND_PLACES=468, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=507, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=426, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=9091, PETRI_PLACES=482, PETRI_TRANSITIONS=507} [2024-11-28 05:08:01,564 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 460 predicate places. [2024-11-28 05:08:01,564 INFO L471 AbstractCegarLoop]: Abstraction has has 482 places, 507 transitions, 9091 flow [2024-11-28 05:08:01,565 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 4.964285714285714) internal successors, (139), 28 states have internal predecessors, (139), 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) [2024-11-28 05:08:01,565 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:08:01,565 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:08:01,575 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2024-11-28 05:08:01,765 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,93 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:08:01,765 INFO L396 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:08:01,766 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:08:01,766 INFO L85 PathProgramCache]: Analyzing trace with hash -1908459947, now seen corresponding path program 91 times [2024-11-28 05:08:01,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:08:01,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556307625] [2024-11-28 05:08:01,766 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 05:08:01,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:08:01,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:08:02,525 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-28 05:08:02,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:08:02,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556307625] [2024-11-28 05:08:02,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556307625] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:08:02,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942466218] [2024-11-28 05:08:02,526 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 05:08:02,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:08:02,526 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:08:02,527 INFO L229 MonitoredProcess]: Starting monitored process 94 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:08:02,529 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2024-11-28 05:08:02,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:08:02,961 INFO L256 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-28 05:08:02,962 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:08:03,089 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:08:03,089 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 81 treesize of output 45 [2024-11-28 05:08:03,144 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:08:03,144 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:08:03,311 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-11-28 05:08:03,311 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2024-11-28 05:08:03,402 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:08:03,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942466218] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:08:03,402 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:08:03,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 9] total 29 [2024-11-28 05:08:03,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34787784] [2024-11-28 05:08:03,402 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:08:03,403 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-28 05:08:03,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:08:03,403 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-28 05:08:03,403 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=715, Unknown=0, NotChecked=0, Total=812 [2024-11-28 05:08:03,403 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 05:08:03,404 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 482 places, 507 transitions, 9091 flow. Second operand has 29 states, 29 states have (on average 4.758620689655173) internal successors, (138), 29 states have internal predecessors, (138), 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) [2024-11-28 05:08:03,404 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:08:03,404 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 05:08:03,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:08:06,289 INFO L124 PetriNetUnfolderBase]: 1935/3689 cut-off events. [2024-11-28 05:08:06,290 INFO L125 PetriNetUnfolderBase]: For 324718/324718 co-relation queries the response was YES. [2024-11-28 05:08:06,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47042 conditions, 3689 events. 1935/3689 cut-off events. For 324718/324718 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 25723 event pairs, 735 based on Foata normal form. 25/3712 useless extension candidates. Maximal degree in co-relation 46857. Up to 2936 conditions per place. [2024-11-28 05:08:06,351 INFO L140 encePairwiseOnDemand]: 11/22 looper letters, 452 selfloop transitions, 132 changer transitions 15/600 dead transitions. [2024-11-28 05:08:06,351 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 509 places, 600 transitions, 12720 flow [2024-11-28 05:08:06,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-11-28 05:08:06,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2024-11-28 05:08:06,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 250 transitions. [2024-11-28 05:08:06,352 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.36656891495601174 [2024-11-28 05:08:06,352 INFO L175 Difference]: Start difference. First operand has 482 places, 507 transitions, 9091 flow. Second operand 31 states and 250 transitions. [2024-11-28 05:08:06,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 509 places, 600 transitions, 12720 flow [2024-11-28 05:08:08,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 499 places, 600 transitions, 12554 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-11-28 05:08:08,050 INFO L231 Difference]: Finished difference. Result has 507 places, 513 transitions, 9583 flow [2024-11-28 05:08:08,051 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=8892, PETRI_DIFFERENCE_MINUEND_PLACES=469, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=505, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=377, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=9583, PETRI_PLACES=507, PETRI_TRANSITIONS=513} [2024-11-28 05:08:08,051 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 485 predicate places. [2024-11-28 05:08:08,051 INFO L471 AbstractCegarLoop]: Abstraction has has 507 places, 513 transitions, 9583 flow [2024-11-28 05:08:08,051 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 4.758620689655173) internal successors, (138), 29 states have internal predecessors, (138), 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) [2024-11-28 05:08:08,051 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:08:08,051 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:08:08,064 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Ended with exit code 0 [2024-11-28 05:08:08,252 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,94 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:08:08,252 INFO L396 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:08:08,252 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:08:08,253 INFO L85 PathProgramCache]: Analyzing trace with hash 1212766777, now seen corresponding path program 92 times [2024-11-28 05:08:08,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:08:08,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106945253] [2024-11-28 05:08:08,253 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:08:08,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:08:08,278 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:08:08,278 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:08:09,053 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-28 05:08:09,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:08:09,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106945253] [2024-11-28 05:08:09,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106945253] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:08:09,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755376367] [2024-11-28 05:08:09,053 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:08:09,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:08:09,054 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:08:09,055 INFO L229 MonitoredProcess]: Starting monitored process 95 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:08:09,056 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2024-11-28 05:08:09,495 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:08:09,495 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:08:09,497 INFO L256 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-28 05:08:09,498 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:08:09,739 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:08:09,739 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 34 [2024-11-28 05:08:09,838 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:08:09,838 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:08:10,181 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-11-28 05:08:10,181 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 73 treesize of output 94 [2024-11-28 05:08:10,350 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:08:10,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755376367] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:08:10,350 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:08:10,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 10] total 32 [2024-11-28 05:08:10,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677366196] [2024-11-28 05:08:10,350 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:08:10,350 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-28 05:08:10,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:08:10,351 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-28 05:08:10,351 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=887, Unknown=0, NotChecked=0, Total=992 [2024-11-28 05:08:10,351 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 05:08:10,352 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 507 places, 513 transitions, 9583 flow. Second operand has 32 states, 32 states have (on average 4.65625) internal successors, (149), 32 states have internal predecessors, (149), 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) [2024-11-28 05:08:10,352 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:08:10,352 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 05:08:10,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:08:13,194 INFO L124 PetriNetUnfolderBase]: 1950/3718 cut-off events. [2024-11-28 05:08:13,194 INFO L125 PetriNetUnfolderBase]: For 372601/372601 co-relation queries the response was YES. [2024-11-28 05:08:13,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49835 conditions, 3718 events. 1950/3718 cut-off events. For 372601/372601 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 25962 event pairs, 819 based on Foata normal form. 18/3734 useless extension candidates. Maximal degree in co-relation 49643. Up to 3219 conditions per place. [2024-11-28 05:08:13,265 INFO L140 encePairwiseOnDemand]: 11/22 looper letters, 449 selfloop transitions, 109 changer transitions 0/559 dead transitions. [2024-11-28 05:08:13,265 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 527 places, 559 transitions, 12111 flow [2024-11-28 05:08:13,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-28 05:08:13,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-11-28 05:08:13,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 162 transitions. [2024-11-28 05:08:13,266 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3201581027667984 [2024-11-28 05:08:13,267 INFO L175 Difference]: Start difference. First operand has 507 places, 513 transitions, 9583 flow. Second operand 23 states and 162 transitions. [2024-11-28 05:08:13,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 527 places, 559 transitions, 12111 flow [2024-11-28 05:08:15,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 503 places, 559 transitions, 11603 flow, removed 126 selfloop flow, removed 24 redundant places. [2024-11-28 05:08:15,063 INFO L231 Difference]: Finished difference. Result has 507 places, 518 transitions, 9647 flow [2024-11-28 05:08:15,063 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=9083, PETRI_DIFFERENCE_MINUEND_PLACES=481, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=513, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=406, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=9647, PETRI_PLACES=507, PETRI_TRANSITIONS=518} [2024-11-28 05:08:15,064 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 485 predicate places. [2024-11-28 05:08:15,064 INFO L471 AbstractCegarLoop]: Abstraction has has 507 places, 518 transitions, 9647 flow [2024-11-28 05:08:15,064 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 4.65625) internal successors, (149), 32 states have internal predecessors, (149), 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) [2024-11-28 05:08:15,064 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:08:15,064 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:08:15,072 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Ended with exit code 0 [2024-11-28 05:08:15,264 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,95 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:08:15,264 INFO L396 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:08:15,266 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:08:15,266 INFO L85 PathProgramCache]: Analyzing trace with hash 245025488, now seen corresponding path program 93 times [2024-11-28 05:08:15,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:08:15,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433440641] [2024-11-28 05:08:15,266 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 05:08:15,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:08:15,291 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-28 05:08:15,292 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:08:15,734 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-28 05:08:15,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:08:15,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433440641] [2024-11-28 05:08:15,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433440641] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:08:15,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840385824] [2024-11-28 05:08:15,734 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 05:08:15,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:08:15,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:08:15,736 INFO L229 MonitoredProcess]: Starting monitored process 96 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:08:15,737 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2024-11-28 05:08:16,172 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-28 05:08:16,172 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:08:16,174 INFO L256 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-11-28 05:08:16,175 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:08:16,469 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-11-28 05:08:16,469 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2024-11-28 05:08:16,490 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-28 05:08:16,490 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:08:16,679 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-11-28 05:08:16,679 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 83 [2024-11-28 05:08:16,797 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:08:16,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840385824] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:08:16,798 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:08:16,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 26 [2024-11-28 05:08:16,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17423072] [2024-11-28 05:08:16,798 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:08:16,798 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-28 05:08:16,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:08:16,799 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-28 05:08:16,799 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2024-11-28 05:08:16,799 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 05:08:16,799 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 507 places, 518 transitions, 9647 flow. Second operand has 26 states, 26 states have (on average 5.0) internal successors, (130), 26 states have internal predecessors, (130), 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) [2024-11-28 05:08:16,799 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:08:16,799 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 05:08:16,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:08:18,567 INFO L124 PetriNetUnfolderBase]: 1971/3754 cut-off events. [2024-11-28 05:08:18,567 INFO L125 PetriNetUnfolderBase]: For 387044/387044 co-relation queries the response was YES. [2024-11-28 05:08:18,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50434 conditions, 3754 events. 1971/3754 cut-off events. For 387044/387044 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 26275 event pairs, 817 based on Foata normal form. 10/3762 useless extension candidates. Maximal degree in co-relation 50240. Up to 3221 conditions per place. [2024-11-28 05:08:18,626 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 467 selfloop transitions, 90 changer transitions 0/558 dead transitions. [2024-11-28 05:08:18,626 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 520 places, 558 transitions, 11560 flow [2024-11-28 05:08:18,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-28 05:08:18,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-28 05:08:18,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 111 transitions. [2024-11-28 05:08:18,627 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.36038961038961037 [2024-11-28 05:08:18,627 INFO L175 Difference]: Start difference. First operand has 507 places, 518 transitions, 9647 flow. Second operand 14 states and 111 transitions. [2024-11-28 05:08:18,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 520 places, 558 transitions, 11560 flow [2024-11-28 05:08:20,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 504 places, 558 transitions, 11196 flow, removed 106 selfloop flow, removed 16 redundant places. [2024-11-28 05:08:20,472 INFO L231 Difference]: Finished difference. Result has 505 places, 520 transitions, 9567 flow [2024-11-28 05:08:20,473 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=9283, PETRI_DIFFERENCE_MINUEND_PLACES=491, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=518, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=428, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=9567, PETRI_PLACES=505, PETRI_TRANSITIONS=520} [2024-11-28 05:08:20,473 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 483 predicate places. [2024-11-28 05:08:20,473 INFO L471 AbstractCegarLoop]: Abstraction has has 505 places, 520 transitions, 9567 flow [2024-11-28 05:08:20,474 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 5.0) internal successors, (130), 26 states have internal predecessors, (130), 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) [2024-11-28 05:08:20,474 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:08:20,474 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:08:20,482 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Ended with exit code 0 [2024-11-28 05:08:20,674 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2024-11-28 05:08:20,674 INFO L396 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:08:20,675 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:08:20,675 INFO L85 PathProgramCache]: Analyzing trace with hash 1552289304, now seen corresponding path program 94 times [2024-11-28 05:08:20,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:08:20,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49797008] [2024-11-28 05:08:20,675 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 05:08:20,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:08:20,707 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 05:08:20,707 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:08:21,469 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-28 05:08:21,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:08:21,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49797008] [2024-11-28 05:08:21,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49797008] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:08:21,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102174354] [2024-11-28 05:08:21,469 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 05:08:21,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:08:21,470 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:08:21,471 INFO L229 MonitoredProcess]: Starting monitored process 97 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:08:21,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2024-11-28 05:08:21,914 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 05:08:21,914 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:08:21,915 INFO L256 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-28 05:08:21,916 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:08:22,029 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:08:22,029 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 81 treesize of output 45 [2024-11-28 05:08:22,106 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:08:22,106 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:08:22,287 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-11-28 05:08:22,287 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2024-11-28 05:08:22,407 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:08:22,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102174354] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:08:22,408 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:08:22,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 9] total 29 [2024-11-28 05:08:22,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323835506] [2024-11-28 05:08:22,408 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:08:22,408 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-28 05:08:22,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:08:22,409 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-28 05:08:22,409 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=714, Unknown=0, NotChecked=0, Total=812 [2024-11-28 05:08:22,409 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 05:08:22,409 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 505 places, 520 transitions, 9567 flow. Second operand has 29 states, 29 states have (on average 4.689655172413793) internal successors, (136), 29 states have internal predecessors, (136), 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) [2024-11-28 05:08:22,409 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:08:22,409 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 05:08:22,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:08:25,488 INFO L124 PetriNetUnfolderBase]: 2012/3866 cut-off events. [2024-11-28 05:08:25,488 INFO L125 PetriNetUnfolderBase]: For 417028/417028 co-relation queries the response was YES. [2024-11-28 05:08:25,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52720 conditions, 3866 events. 2012/3866 cut-off events. For 417028/417028 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 27437 event pairs, 813 based on Foata normal form. 10/3874 useless extension candidates. Maximal degree in co-relation 52524. Up to 3201 conditions per place. [2024-11-28 05:08:25,566 INFO L140 encePairwiseOnDemand]: 11/22 looper letters, 458 selfloop transitions, 129 changer transitions 7/595 dead transitions. [2024-11-28 05:08:25,567 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 534 places, 595 transitions, 12874 flow [2024-11-28 05:08:25,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-11-28 05:08:25,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2024-11-28 05:08:25,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 223 transitions. [2024-11-28 05:08:25,568 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3378787878787879 [2024-11-28 05:08:25,568 INFO L175 Difference]: Start difference. First operand has 505 places, 520 transitions, 9567 flow. Second operand 30 states and 223 transitions. [2024-11-28 05:08:25,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 534 places, 595 transitions, 12874 flow [2024-11-28 05:08:27,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 518 places, 595 transitions, 12562 flow, removed 27 selfloop flow, removed 16 redundant places. [2024-11-28 05:08:27,706 INFO L231 Difference]: Finished difference. Result has 524 places, 525 transitions, 9877 flow [2024-11-28 05:08:27,706 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=9255, PETRI_DIFFERENCE_MINUEND_PLACES=489, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=520, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=393, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=9877, PETRI_PLACES=524, PETRI_TRANSITIONS=525} [2024-11-28 05:08:27,706 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 502 predicate places. [2024-11-28 05:08:27,706 INFO L471 AbstractCegarLoop]: Abstraction has has 524 places, 525 transitions, 9877 flow [2024-11-28 05:08:27,706 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 4.689655172413793) internal successors, (136), 29 states have internal predecessors, (136), 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) [2024-11-28 05:08:27,706 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:08:27,707 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:08:27,718 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Ended with exit code 0 [2024-11-28 05:08:27,907 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2024-11-28 05:08:27,907 INFO L396 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:08:27,908 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:08:27,908 INFO L85 PathProgramCache]: Analyzing trace with hash -261320778, now seen corresponding path program 95 times [2024-11-28 05:08:27,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:08:27,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771065367] [2024-11-28 05:08:27,908 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 05:08:27,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:08:27,943 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-11-28 05:08:27,943 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:08:28,469 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-28 05:08:28,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:08:28,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771065367] [2024-11-28 05:08:28,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771065367] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:08:28,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399727527] [2024-11-28 05:08:28,469 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 05:08:28,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:08:28,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:08:28,471 INFO L229 MonitoredProcess]: Starting monitored process 98 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:08:28,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2024-11-28 05:08:29,042 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-11-28 05:08:29,042 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:08:29,045 INFO L256 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-11-28 05:08:29,046 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:08:29,331 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-28 05:08:29,331 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:08:29,530 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-11-28 05:08:29,531 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2024-11-28 05:08:29,657 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:08:29,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399727527] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:08:29,657 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:08:29,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 9] total 30 [2024-11-28 05:08:29,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544714406] [2024-11-28 05:08:29,657 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:08:29,657 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-28 05:08:29,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:08:29,658 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-28 05:08:29,658 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=758, Unknown=0, NotChecked=0, Total=870 [2024-11-28 05:08:29,658 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 05:08:29,658 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 524 places, 525 transitions, 9877 flow. Second operand has 30 states, 30 states have (on average 5.0) internal successors, (150), 30 states have internal predecessors, (150), 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) [2024-11-28 05:08:29,658 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:08:29,658 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 05:08:29,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:08:31,723 INFO L124 PetriNetUnfolderBase]: 2032/3892 cut-off events. [2024-11-28 05:08:31,723 INFO L125 PetriNetUnfolderBase]: For 490356/490356 co-relation queries the response was YES. [2024-11-28 05:08:31,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54796 conditions, 3892 events. 2032/3892 cut-off events. For 490356/490356 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 27699 event pairs, 806 based on Foata normal form. 23/3913 useless extension candidates. Maximal degree in co-relation 54596. Up to 3216 conditions per place. [2024-11-28 05:08:31,801 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 458 selfloop transitions, 121 changer transitions 0/580 dead transitions. [2024-11-28 05:08:31,801 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 542 places, 580 transitions, 12403 flow [2024-11-28 05:08:31,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-28 05:08:31,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-11-28 05:08:31,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 155 transitions. [2024-11-28 05:08:31,802 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3522727272727273 [2024-11-28 05:08:31,802 INFO L175 Difference]: Start difference. First operand has 524 places, 525 transitions, 9877 flow. Second operand 20 states and 155 transitions. [2024-11-28 05:08:31,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 542 places, 580 transitions, 12403 flow [2024-11-28 05:08:34,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 520 places, 580 transitions, 11909 flow, removed 128 selfloop flow, removed 22 redundant places. [2024-11-28 05:08:34,314 INFO L231 Difference]: Finished difference. Result has 522 places, 528 transitions, 9873 flow [2024-11-28 05:08:34,314 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=9383, PETRI_DIFFERENCE_MINUEND_PLACES=501, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=525, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=9873, PETRI_PLACES=522, PETRI_TRANSITIONS=528} [2024-11-28 05:08:34,315 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 500 predicate places. [2024-11-28 05:08:34,315 INFO L471 AbstractCegarLoop]: Abstraction has has 522 places, 528 transitions, 9873 flow [2024-11-28 05:08:34,315 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 5.0) internal successors, (150), 30 states have internal predecessors, (150), 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) [2024-11-28 05:08:34,315 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:08:34,315 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:08:34,323 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Ended with exit code 0 [2024-11-28 05:08:34,515 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2024-11-28 05:08:34,515 INFO L396 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:08:34,516 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:08:34,516 INFO L85 PathProgramCache]: Analyzing trace with hash -692910758, now seen corresponding path program 96 times [2024-11-28 05:08:34,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:08:34,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227874674] [2024-11-28 05:08:34,516 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 05:08:34,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:08:34,538 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-28 05:08:34,538 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:08:34,928 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-28 05:08:34,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:08:34,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227874674] [2024-11-28 05:08:34,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227874674] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:08:34,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129560781] [2024-11-28 05:08:34,928 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 05:08:34,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:08:34,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:08:34,930 INFO L229 MonitoredProcess]: Starting monitored process 99 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:08:34,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2024-11-28 05:08:35,381 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-28 05:08:35,381 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:08:35,383 INFO L256 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-28 05:08:35,385 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:08:35,609 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:08:35,609 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:08:35,808 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-11-28 05:08:35,809 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2024-11-28 05:08:35,977 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:08:35,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1129560781] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:08:35,977 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:08:35,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 10] total 26 [2024-11-28 05:08:35,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91895870] [2024-11-28 05:08:35,977 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:08:35,977 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-28 05:08:35,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:08:35,978 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-28 05:08:35,978 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=575, Unknown=0, NotChecked=0, Total=650 [2024-11-28 05:08:35,978 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 05:08:35,978 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 522 places, 528 transitions, 9873 flow. Second operand has 26 states, 26 states have (on average 4.884615384615385) internal successors, (127), 26 states have internal predecessors, (127), 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) [2024-11-28 05:08:35,978 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:08:35,978 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 05:08:35,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:08:38,419 INFO L124 PetriNetUnfolderBase]: 2022/3858 cut-off events. [2024-11-28 05:08:38,420 INFO L125 PetriNetUnfolderBase]: For 484826/484826 co-relation queries the response was YES. [2024-11-28 05:08:38,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54410 conditions, 3858 events. 2022/3858 cut-off events. For 484826/484826 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 27189 event pairs, 850 based on Foata normal form. 4/3860 useless extension candidates. Maximal degree in co-relation 54209. Up to 3338 conditions per place. [2024-11-28 05:08:38,495 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 469 selfloop transitions, 102 changer transitions 10/582 dead transitions. [2024-11-28 05:08:38,495 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 545 places, 582 transitions, 12254 flow [2024-11-28 05:08:38,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-28 05:08:38,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-11-28 05:08:38,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 172 transitions. [2024-11-28 05:08:38,496 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.32575757575757575 [2024-11-28 05:08:38,496 INFO L175 Difference]: Start difference. First operand has 522 places, 528 transitions, 9873 flow. Second operand 24 states and 172 transitions. [2024-11-28 05:08:38,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 545 places, 582 transitions, 12254 flow [2024-11-28 05:08:41,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 531 places, 582 transitions, 11960 flow, removed 71 selfloop flow, removed 14 redundant places. [2024-11-28 05:08:41,204 INFO L231 Difference]: Finished difference. Result has 536 places, 530 transitions, 9989 flow [2024-11-28 05:08:41,204 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=9581, PETRI_DIFFERENCE_MINUEND_PLACES=508, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=528, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=427, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=9989, PETRI_PLACES=536, PETRI_TRANSITIONS=530} [2024-11-28 05:08:41,204 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 514 predicate places. [2024-11-28 05:08:41,204 INFO L471 AbstractCegarLoop]: Abstraction has has 536 places, 530 transitions, 9989 flow [2024-11-28 05:08:41,204 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.884615384615385) internal successors, (127), 26 states have internal predecessors, (127), 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) [2024-11-28 05:08:41,204 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:08:41,204 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:08:41,215 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Ended with exit code 0 [2024-11-28 05:08:41,405 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,99 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:08:41,405 INFO L396 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:08:41,406 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:08:41,406 INFO L85 PathProgramCache]: Analyzing trace with hash 1739952584, now seen corresponding path program 97 times [2024-11-28 05:08:41,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:08:41,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082530698] [2024-11-28 05:08:41,406 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 05:08:41,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:08:41,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:08:42,111 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-28 05:08:42,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:08:42,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082530698] [2024-11-28 05:08:42,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082530698] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:08:42,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340760024] [2024-11-28 05:08:42,111 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 05:08:42,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:08:42,111 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:08:42,113 INFO L229 MonitoredProcess]: Starting monitored process 100 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:08:42,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2024-11-28 05:08:42,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:08:42,564 INFO L256 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-28 05:08:42,565 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:08:42,675 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:08:42,675 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 34 [2024-11-28 05:08:42,757 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:08:42,757 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:08:42,977 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-11-28 05:08:42,978 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2024-11-28 05:08:43,051 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:08:43,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340760024] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:08:43,051 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:08:43,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 9] total 28 [2024-11-28 05:08:43,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085190636] [2024-11-28 05:08:43,051 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:08:43,052 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-28 05:08:43,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:08:43,052 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-28 05:08:43,052 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2024-11-28 05:08:43,052 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 05:08:43,052 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 536 places, 530 transitions, 9989 flow. Second operand has 28 states, 28 states have (on average 4.75) internal successors, (133), 28 states have internal predecessors, (133), 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) [2024-11-28 05:08:43,053 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:08:43,053 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 05:08:43,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:08:45,901 INFO L124 PetriNetUnfolderBase]: 2035/3874 cut-off events. [2024-11-28 05:08:45,901 INFO L125 PetriNetUnfolderBase]: For 547197/547197 co-relation queries the response was YES. [2024-11-28 05:08:45,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55729 conditions, 3874 events. 2035/3874 cut-off events. For 547197/547197 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 27246 event pairs, 764 based on Foata normal form. 25/3897 useless extension candidates. Maximal degree in co-relation 55521. Up to 3100 conditions per place. [2024-11-28 05:08:45,960 INFO L140 encePairwiseOnDemand]: 11/22 looper letters, 459 selfloop transitions, 152 changer transitions 3/615 dead transitions. [2024-11-28 05:08:45,960 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 563 places, 615 transitions, 13160 flow [2024-11-28 05:08:45,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-11-28 05:08:45,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2024-11-28 05:08:45,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 237 transitions. [2024-11-28 05:08:45,962 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3366477272727273 [2024-11-28 05:08:45,962 INFO L175 Difference]: Start difference. First operand has 536 places, 530 transitions, 9989 flow. Second operand 32 states and 237 transitions. [2024-11-28 05:08:45,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 563 places, 615 transitions, 13160 flow [2024-11-28 05:08:48,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 543 places, 615 transitions, 12661 flow, removed 145 selfloop flow, removed 20 redundant places. [2024-11-28 05:08:48,251 INFO L231 Difference]: Finished difference. Result has 550 places, 540 transitions, 10489 flow [2024-11-28 05:08:48,251 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=9481, PETRI_DIFFERENCE_MINUEND_PLACES=512, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=528, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=383, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=10489, PETRI_PLACES=550, PETRI_TRANSITIONS=540} [2024-11-28 05:08:48,252 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 528 predicate places. [2024-11-28 05:08:48,252 INFO L471 AbstractCegarLoop]: Abstraction has has 550 places, 540 transitions, 10489 flow [2024-11-28 05:08:48,252 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 4.75) internal successors, (133), 28 states have internal predecessors, (133), 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) [2024-11-28 05:08:48,252 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:08:48,252 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:08:48,263 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Ended with exit code 0 [2024-11-28 05:08:48,452 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2024-11-28 05:08:48,452 INFO L396 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:08:48,453 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:08:48,453 INFO L85 PathProgramCache]: Analyzing trace with hash -1961857056, now seen corresponding path program 98 times [2024-11-28 05:08:48,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:08:48,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694889738] [2024-11-28 05:08:48,453 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:08:48,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:08:48,479 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:08:48,479 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:08:49,202 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-28 05:08:49,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:08:49,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694889738] [2024-11-28 05:08:49,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694889738] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:08:49,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514415947] [2024-11-28 05:08:49,202 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:08:49,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:08:49,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:08:49,204 INFO L229 MonitoredProcess]: Starting monitored process 101 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:08:49,205 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2024-11-28 05:08:49,661 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:08:49,661 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:08:49,663 INFO L256 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-28 05:08:49,664 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:08:49,840 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:08:49,840 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 34 [2024-11-28 05:08:49,953 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:08:49,953 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:08:50,152 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-11-28 05:08:50,152 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2024-11-28 05:08:50,343 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:08:50,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [514415947] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:08:50,343 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:08:50,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 9] total 31 [2024-11-28 05:08:50,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23155099] [2024-11-28 05:08:50,343 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:08:50,344 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-28 05:08:50,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:08:50,344 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-28 05:08:50,344 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=826, Unknown=0, NotChecked=0, Total=930 [2024-11-28 05:08:50,344 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 05:08:50,345 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 550 places, 540 transitions, 10489 flow. Second operand has 31 states, 31 states have (on average 4.806451612903226) internal successors, (149), 31 states have internal predecessors, (149), 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) [2024-11-28 05:08:50,345 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:08:50,345 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 05:08:50,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:08:53,414 INFO L124 PetriNetUnfolderBase]: 2020/3835 cut-off events. [2024-11-28 05:08:53,414 INFO L125 PetriNetUnfolderBase]: For 578923/578923 co-relation queries the response was YES. [2024-11-28 05:08:53,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56543 conditions, 3835 events. 2020/3835 cut-off events. For 578923/578923 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 26754 event pairs, 832 based on Foata normal form. 15/3848 useless extension candidates. Maximal degree in co-relation 56329. Up to 3278 conditions per place. [2024-11-28 05:08:53,492 INFO L140 encePairwiseOnDemand]: 11/22 looper letters, 462 selfloop transitions, 128 changer transitions 2/593 dead transitions. [2024-11-28 05:08:53,492 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 577 places, 593 transitions, 12810 flow [2024-11-28 05:08:53,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-11-28 05:08:53,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2024-11-28 05:08:53,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 205 transitions. [2024-11-28 05:08:53,493 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3213166144200627 [2024-11-28 05:08:53,493 INFO L175 Difference]: Start difference. First operand has 550 places, 540 transitions, 10489 flow. Second operand 29 states and 205 transitions. [2024-11-28 05:08:53,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 577 places, 593 transitions, 12810 flow [2024-11-28 05:08:56,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 552 places, 593 transitions, 12142 flow, removed 237 selfloop flow, removed 25 redundant places. [2024-11-28 05:08:56,509 INFO L231 Difference]: Finished difference. Result has 552 places, 538 transitions, 10044 flow [2024-11-28 05:08:56,509 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=9788, PETRI_DIFFERENCE_MINUEND_PLACES=524, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=538, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=410, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=10044, PETRI_PLACES=552, PETRI_TRANSITIONS=538} [2024-11-28 05:08:56,510 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 530 predicate places. [2024-11-28 05:08:56,510 INFO L471 AbstractCegarLoop]: Abstraction has has 552 places, 538 transitions, 10044 flow [2024-11-28 05:08:56,510 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 4.806451612903226) internal successors, (149), 31 states have internal predecessors, (149), 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) [2024-11-28 05:08:56,510 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:08:56,510 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:08:56,520 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Ended with exit code 0 [2024-11-28 05:08:56,710 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2024-11-28 05:08:56,710 INFO L396 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:08:56,711 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:08:56,711 INFO L85 PathProgramCache]: Analyzing trace with hash -1186613277, now seen corresponding path program 99 times [2024-11-28 05:08:56,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:08:56,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321799208] [2024-11-28 05:08:56,711 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 05:08:56,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:08:56,736 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 05:08:56,736 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:08:57,184 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-28 05:08:57,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:08:57,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321799208] [2024-11-28 05:08:57,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321799208] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:08:57,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626716541] [2024-11-28 05:08:57,184 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 05:08:57,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:08:57,184 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:08:57,186 INFO L229 MonitoredProcess]: Starting monitored process 102 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:08:57,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2024-11-28 05:08:57,634 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 05:08:57,635 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:08:57,636 INFO L256 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-28 05:08:57,637 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:08:57,861 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:08:57,861 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:08:58,052 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-11-28 05:08:58,052 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 73 treesize of output 94 [2024-11-28 05:08:58,172 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:08:58,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626716541] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:08:58,172 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:08:58,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 26 [2024-11-28 05:08:58,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139841969] [2024-11-28 05:08:58,173 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:08:58,173 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-28 05:08:58,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:08:58,173 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-28 05:08:58,173 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=575, Unknown=0, NotChecked=0, Total=650 [2024-11-28 05:08:58,173 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 05:08:58,174 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 552 places, 538 transitions, 10044 flow. Second operand has 26 states, 26 states have (on average 4.923076923076923) internal successors, (128), 26 states have internal predecessors, (128), 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) [2024-11-28 05:08:58,174 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:08:58,174 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 05:08:58,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:09:00,246 INFO L124 PetriNetUnfolderBase]: 2009/3806 cut-off events. [2024-11-28 05:09:00,246 INFO L125 PetriNetUnfolderBase]: For 547595/547595 co-relation queries the response was YES. [2024-11-28 05:09:00,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54588 conditions, 3806 events. 2009/3806 cut-off events. For 547595/547595 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 26437 event pairs, 856 based on Foata normal form. 3/3807 useless extension candidates. Maximal degree in co-relation 54375. Up to 3377 conditions per place. [2024-11-28 05:09:00,325 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 462 selfloop transitions, 84 changer transitions 6/553 dead transitions. [2024-11-28 05:09:00,325 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 562 places, 553 transitions, 11356 flow [2024-11-28 05:09:00,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-28 05:09:00,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-28 05:09:00,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 93 transitions. [2024-11-28 05:09:00,326 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.32517482517482516 [2024-11-28 05:09:00,326 INFO L175 Difference]: Start difference. First operand has 552 places, 538 transitions, 10044 flow. Second operand 13 states and 93 transitions. [2024-11-28 05:09:00,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 562 places, 553 transitions, 11356 flow [2024-11-28 05:09:02,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 534 places, 553 transitions, 11091 flow, removed 3 selfloop flow, removed 28 redundant places. [2024-11-28 05:09:02,992 INFO L231 Difference]: Finished difference. Result has 534 places, 534 transitions, 9880 flow [2024-11-28 05:09:02,992 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=9741, PETRI_DIFFERENCE_MINUEND_PLACES=522, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=536, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=452, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=9880, PETRI_PLACES=534, PETRI_TRANSITIONS=534} [2024-11-28 05:09:02,993 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 512 predicate places. [2024-11-28 05:09:02,993 INFO L471 AbstractCegarLoop]: Abstraction has has 534 places, 534 transitions, 9880 flow [2024-11-28 05:09:02,993 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.923076923076923) internal successors, (128), 26 states have internal predecessors, (128), 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) [2024-11-28 05:09:02,993 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:09:02,993 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:09:03,004 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Forceful destruction successful, exit code 0 [2024-11-28 05:09:03,193 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2024-11-28 05:09:03,194 INFO L396 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:09:03,194 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:09:03,194 INFO L85 PathProgramCache]: Analyzing trace with hash 779302227, now seen corresponding path program 100 times [2024-11-28 05:09:03,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:09:03,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177889072] [2024-11-28 05:09:03,194 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 05:09:03,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:09:03,218 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 05:09:03,218 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:09:03,896 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-28 05:09:03,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:09:03,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177889072] [2024-11-28 05:09:03,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177889072] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:09:03,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500434864] [2024-11-28 05:09:03,897 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 05:09:03,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:09:03,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:09:03,899 INFO L229 MonitoredProcess]: Starting monitored process 103 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:09:03,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2024-11-28 05:09:04,363 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 05:09:04,364 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:09:04,365 INFO L256 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-28 05:09:04,366 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:09:04,482 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:09:04,482 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 34 [2024-11-28 05:09:04,570 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:09:04,570 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:09:04,754 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-11-28 05:09:04,754 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2024-11-28 05:09:04,875 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:09:04,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500434864] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:09:04,875 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:09:04,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 9] total 28 [2024-11-28 05:09:04,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851792354] [2024-11-28 05:09:04,875 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:09:04,875 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-28 05:09:04,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:09:04,876 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-28 05:09:04,876 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=663, Unknown=0, NotChecked=0, Total=756 [2024-11-28 05:09:04,876 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 05:09:04,876 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 534 places, 534 transitions, 9880 flow. Second operand has 28 states, 28 states have (on average 4.75) internal successors, (133), 28 states have internal predecessors, (133), 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) [2024-11-28 05:09:04,876 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:09:04,876 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 05:09:04,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:09:07,327 INFO L124 PetriNetUnfolderBase]: 2002/3779 cut-off events. [2024-11-28 05:09:07,328 INFO L125 PetriNetUnfolderBase]: For 538137/538137 co-relation queries the response was YES. [2024-11-28 05:09:07,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54073 conditions, 3779 events. 2002/3779 cut-off events. For 538137/538137 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 26091 event pairs, 806 based on Foata normal form. 8/3785 useless extension candidates. Maximal degree in co-relation 53877. Up to 3182 conditions per place. [2024-11-28 05:09:07,400 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 449 selfloop transitions, 132 changer transitions 1/583 dead transitions. [2024-11-28 05:09:07,400 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 556 places, 583 transitions, 12824 flow [2024-11-28 05:09:07,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-28 05:09:07,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-11-28 05:09:07,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 197 transitions. [2024-11-28 05:09:07,401 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3198051948051948 [2024-11-28 05:09:07,401 INFO L175 Difference]: Start difference. First operand has 534 places, 534 transitions, 9880 flow. Second operand 28 states and 197 transitions. [2024-11-28 05:09:07,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 556 places, 583 transitions, 12824 flow [2024-11-28 05:09:09,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 543 places, 583 transitions, 12639 flow, removed 5 selfloop flow, removed 13 redundant places. [2024-11-28 05:09:09,906 INFO L231 Difference]: Finished difference. Result has 544 places, 534 transitions, 10029 flow [2024-11-28 05:09:09,906 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=9671, PETRI_DIFFERENCE_MINUEND_PLACES=516, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=533, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=402, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=10029, PETRI_PLACES=544, PETRI_TRANSITIONS=534} [2024-11-28 05:09:09,906 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 522 predicate places. [2024-11-28 05:09:09,906 INFO L471 AbstractCegarLoop]: Abstraction has has 544 places, 534 transitions, 10029 flow [2024-11-28 05:09:09,906 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 4.75) internal successors, (133), 28 states have internal predecessors, (133), 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) [2024-11-28 05:09:09,906 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:09:09,907 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:09:09,914 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Ended with exit code 0 [2024-11-28 05:09:10,107 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,103 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:09:10,107 INFO L396 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:09:10,108 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:09:10,108 INFO L85 PathProgramCache]: Analyzing trace with hash -648103271, now seen corresponding path program 101 times [2024-11-28 05:09:10,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:09:10,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27804216] [2024-11-28 05:09:10,109 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 05:09:10,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:09:10,143 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-11-28 05:09:10,143 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:09:10,644 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-28 05:09:10,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:09:10,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27804216] [2024-11-28 05:09:10,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27804216] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:09:10,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777151507] [2024-11-28 05:09:10,644 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 05:09:10,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:09:10,644 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:09:10,646 INFO L229 MonitoredProcess]: Starting monitored process 104 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:09:10,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2024-11-28 05:09:11,311 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-11-28 05:09:11,311 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:09:11,313 INFO L256 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-11-28 05:09:11,314 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:09:11,546 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:09:11,546 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 41 [2024-11-28 05:09:11,597 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-28 05:09:11,598 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:09:11,762 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-11-28 05:09:11,763 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2024-11-28 05:09:11,878 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:09:11,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777151507] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:09:11,878 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:09:11,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 9] total 30 [2024-11-28 05:09:11,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296562772] [2024-11-28 05:09:11,878 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:09:11,879 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-28 05:09:11,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:09:11,879 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-28 05:09:11,879 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=761, Unknown=0, NotChecked=0, Total=870 [2024-11-28 05:09:11,879 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 05:09:11,879 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 544 places, 534 transitions, 10029 flow. Second operand has 30 states, 30 states have (on average 4.866666666666666) internal successors, (146), 30 states have internal predecessors, (146), 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) [2024-11-28 05:09:11,879 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:09:11,880 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 05:09:11,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:09:14,400 INFO L124 PetriNetUnfolderBase]: 1981/3719 cut-off events. [2024-11-28 05:09:14,400 INFO L125 PetriNetUnfolderBase]: For 524130/524130 co-relation queries the response was YES. [2024-11-28 05:09:14,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53157 conditions, 3719 events. 1981/3719 cut-off events. For 524130/524130 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 25541 event pairs, 771 based on Foata normal form. 16/3733 useless extension candidates. Maximal degree in co-relation 52947. Up to 3115 conditions per place. [2024-11-28 05:09:14,456 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 461 selfloop transitions, 117 changer transitions 3/582 dead transitions. [2024-11-28 05:09:14,456 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 564 places, 582 transitions, 12354 flow [2024-11-28 05:09:14,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-28 05:09:14,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-11-28 05:09:14,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 173 transitions. [2024-11-28 05:09:14,457 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3574380165289256 [2024-11-28 05:09:14,457 INFO L175 Difference]: Start difference. First operand has 544 places, 534 transitions, 10029 flow. Second operand 22 states and 173 transitions. [2024-11-28 05:09:14,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 564 places, 582 transitions, 12354 flow [2024-11-28 05:09:16,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 536 places, 582 transitions, 12018 flow, removed 51 selfloop flow, removed 28 redundant places. [2024-11-28 05:09:16,627 INFO L231 Difference]: Finished difference. Result has 536 places, 530 transitions, 9842 flow [2024-11-28 05:09:16,627 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=9613, PETRI_DIFFERENCE_MINUEND_PLACES=515, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=531, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=414, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=9842, PETRI_PLACES=536, PETRI_TRANSITIONS=530} [2024-11-28 05:09:16,627 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 514 predicate places. [2024-11-28 05:09:16,628 INFO L471 AbstractCegarLoop]: Abstraction has has 536 places, 530 transitions, 9842 flow [2024-11-28 05:09:16,628 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 4.866666666666666) internal successors, (146), 30 states have internal predecessors, (146), 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) [2024-11-28 05:09:16,628 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:09:16,628 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:09:16,636 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Ended with exit code 0 [2024-11-28 05:09:16,828 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,104 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:09:16,828 INFO L396 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:09:16,829 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:09:16,829 INFO L85 PathProgramCache]: Analyzing trace with hash 1247483971, now seen corresponding path program 102 times [2024-11-28 05:09:16,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:09:16,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635625374] [2024-11-28 05:09:16,829 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 05:09:16,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:09:16,852 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-28 05:09:16,852 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:09:17,240 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-28 05:09:17,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:09:17,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635625374] [2024-11-28 05:09:17,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635625374] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:09:17,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264591753] [2024-11-28 05:09:17,240 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 05:09:17,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:09:17,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:09:17,242 INFO L229 MonitoredProcess]: Starting monitored process 105 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:09:17,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2024-11-28 05:09:17,704 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-28 05:09:17,704 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:09:17,706 INFO L256 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-28 05:09:17,707 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:09:18,043 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-28 05:09:18,043 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:09:18,194 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-11-28 05:09:18,194 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2024-11-28 05:09:18,369 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:09:18,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264591753] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:09:18,369 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:09:18,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 28 [2024-11-28 05:09:18,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521567715] [2024-11-28 05:09:18,370 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:09:18,370 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-28 05:09:18,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:09:18,370 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-28 05:09:18,370 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=658, Unknown=0, NotChecked=0, Total=756 [2024-11-28 05:09:18,370 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 05:09:18,371 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 536 places, 530 transitions, 9842 flow. Second operand has 28 states, 28 states have (on average 4.964285714285714) internal successors, (139), 28 states have internal predecessors, (139), 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) [2024-11-28 05:09:18,371 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:09:18,371 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 05:09:18,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:09:20,792 INFO L124 PetriNetUnfolderBase]: 1958/3671 cut-off events. [2024-11-28 05:09:20,793 INFO L125 PetriNetUnfolderBase]: For 503919/503919 co-relation queries the response was YES. [2024-11-28 05:09:20,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52083 conditions, 3671 events. 1958/3671 cut-off events. For 503919/503919 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 25085 event pairs, 802 based on Foata normal form. 9/3678 useless extension candidates. Maximal degree in co-relation 51876. Up to 3216 conditions per place. [2024-11-28 05:09:20,867 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 444 selfloop transitions, 92 changer transitions 16/553 dead transitions. [2024-11-28 05:09:20,867 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 546 places, 553 transitions, 11215 flow [2024-11-28 05:09:20,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-28 05:09:20,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-28 05:09:20,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 120 transitions. [2024-11-28 05:09:20,868 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.32085561497326204 [2024-11-28 05:09:20,868 INFO L175 Difference]: Start difference. First operand has 536 places, 530 transitions, 9842 flow. Second operand 17 states and 120 transitions. [2024-11-28 05:09:20,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 546 places, 553 transitions, 11215 flow [2024-11-28 05:09:23,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 523 places, 553 transitions, 10968 flow, removed 7 selfloop flow, removed 23 redundant places. [2024-11-28 05:09:23,244 INFO L231 Difference]: Finished difference. Result has 525 places, 522 transitions, 9684 flow [2024-11-28 05:09:23,244 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=9556, PETRI_DIFFERENCE_MINUEND_PLACES=507, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=526, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=434, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=9684, PETRI_PLACES=525, PETRI_TRANSITIONS=522} [2024-11-28 05:09:23,244 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 503 predicate places. [2024-11-28 05:09:23,245 INFO L471 AbstractCegarLoop]: Abstraction has has 525 places, 522 transitions, 9684 flow [2024-11-28 05:09:23,245 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 4.964285714285714) internal successors, (139), 28 states have internal predecessors, (139), 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) [2024-11-28 05:09:23,245 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:09:23,245 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:09:23,252 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Ended with exit code 0 [2024-11-28 05:09:23,445 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,105 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:09:23,445 INFO L396 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:09:23,446 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:09:23,446 INFO L85 PathProgramCache]: Analyzing trace with hash 367795325, now seen corresponding path program 103 times [2024-11-28 05:09:23,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:09:23,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169774106] [2024-11-28 05:09:23,446 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 05:09:23,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:09:23,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:09:24,298 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-28 05:09:24,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:09:24,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169774106] [2024-11-28 05:09:24,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169774106] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:09:24,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650305584] [2024-11-28 05:09:24,299 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 05:09:24,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:09:24,299 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:09:24,301 INFO L229 MonitoredProcess]: Starting monitored process 106 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:09:24,304 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2024-11-28 05:09:24,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:09:24,780 INFO L256 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-28 05:09:24,781 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:09:24,942 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:09:24,943 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 81 treesize of output 45 [2024-11-28 05:09:25,004 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:09:25,004 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:09:25,234 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-11-28 05:09:25,235 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 73 treesize of output 94 [2024-11-28 05:09:25,337 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:09:25,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650305584] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:09:25,337 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:09:25,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 9] total 30 [2024-11-28 05:09:25,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313325397] [2024-11-28 05:09:25,337 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:09:25,338 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-28 05:09:25,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:09:25,338 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-28 05:09:25,338 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=764, Unknown=0, NotChecked=0, Total=870 [2024-11-28 05:09:25,338 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 05:09:25,338 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 525 places, 522 transitions, 9684 flow. Second operand has 30 states, 30 states have (on average 4.666666666666667) internal successors, (140), 30 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:09:25,338 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:09:25,338 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 05:09:25,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:09:27,758 INFO L124 PetriNetUnfolderBase]: 1976/3699 cut-off events. [2024-11-28 05:09:27,758 INFO L125 PetriNetUnfolderBase]: For 511678/511678 co-relation queries the response was YES. [2024-11-28 05:09:27,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53118 conditions, 3699 events. 1976/3699 cut-off events. For 511678/511678 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 25211 event pairs, 861 based on Foata normal form. 8/3705 useless extension candidates. Maximal degree in co-relation 52911. Up to 3346 conditions per place. [2024-11-28 05:09:27,827 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 481 selfloop transitions, 82 changer transitions 2/566 dead transitions. [2024-11-28 05:09:27,827 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 539 places, 566 transitions, 11923 flow [2024-11-28 05:09:27,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-28 05:09:27,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-11-28 05:09:27,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 163 transitions. [2024-11-28 05:09:27,828 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3367768595041322 [2024-11-28 05:09:27,828 INFO L175 Difference]: Start difference. First operand has 525 places, 522 transitions, 9684 flow. Second operand 22 states and 163 transitions. [2024-11-28 05:09:27,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 539 places, 566 transitions, 11923 flow [2024-11-28 05:09:30,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 523 places, 566 transitions, 11716 flow, removed 5 selfloop flow, removed 16 redundant places. [2024-11-28 05:09:30,214 INFO L231 Difference]: Finished difference. Result has 525 places, 526 transitions, 9828 flow [2024-11-28 05:09:30,214 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=9480, PETRI_DIFFERENCE_MINUEND_PLACES=502, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=522, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=440, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=9828, PETRI_PLACES=525, PETRI_TRANSITIONS=526} [2024-11-28 05:09:30,215 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 503 predicate places. [2024-11-28 05:09:30,215 INFO L471 AbstractCegarLoop]: Abstraction has has 525 places, 526 transitions, 9828 flow [2024-11-28 05:09:30,215 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 4.666666666666667) internal successors, (140), 30 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:09:30,215 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:09:30,215 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:09:30,223 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Ended with exit code 0 [2024-11-28 05:09:30,419 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2024-11-28 05:09:30,419 INFO L396 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:09:30,420 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:09:30,420 INFO L85 PathProgramCache]: Analyzing trace with hash 1094566009, now seen corresponding path program 104 times [2024-11-28 05:09:30,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:09:30,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070189845] [2024-11-28 05:09:30,420 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:09:30,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:09:30,443 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:09:30,443 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:09:31,124 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 2 proven. 25 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-28 05:09:31,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:09:31,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070189845] [2024-11-28 05:09:31,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070189845] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:09:31,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960301011] [2024-11-28 05:09:31,124 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:09:31,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:09:31,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:09:31,126 INFO L229 MonitoredProcess]: Starting monitored process 107 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:09:31,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2024-11-28 05:09:31,602 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:09:31,603 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:09:31,604 INFO L256 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-28 05:09:31,606 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:09:31,821 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-11-28 05:09:31,821 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 9 [2024-11-28 05:09:31,845 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:09:31,845 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:09:32,080 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-11-28 05:09:32,080 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 83 [2024-11-28 05:09:32,201 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:09:32,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960301011] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:09:32,201 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:09:32,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 9] total 31 [2024-11-28 05:09:32,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637316129] [2024-11-28 05:09:32,201 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:09:32,202 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-28 05:09:32,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:09:32,202 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-28 05:09:32,202 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=813, Unknown=0, NotChecked=0, Total=930 [2024-11-28 05:09:32,202 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 05:09:32,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 525 places, 526 transitions, 9828 flow. Second operand has 31 states, 31 states have (on average 4.741935483870968) internal successors, (147), 31 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:09:32,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:09:32,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 05:09:32,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:09:34,639 INFO L124 PetriNetUnfolderBase]: 2008/3756 cut-off events. [2024-11-28 05:09:34,639 INFO L125 PetriNetUnfolderBase]: For 536595/536595 co-relation queries the response was YES. [2024-11-28 05:09:34,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54801 conditions, 3756 events. 2008/3756 cut-off events. For 536595/536595 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 25624 event pairs, 899 based on Foata normal form. 8/3762 useless extension candidates. Maximal degree in co-relation 54594. Up to 3518 conditions per place. [2024-11-28 05:09:34,709 INFO L140 encePairwiseOnDemand]: 11/22 looper letters, 505 selfloop transitions, 64 changer transitions 0/570 dead transitions. [2024-11-28 05:09:34,709 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 548 places, 570 transitions, 12861 flow [2024-11-28 05:09:34,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-28 05:09:34,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-11-28 05:09:34,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 163 transitions. [2024-11-28 05:09:34,710 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3087121212121212 [2024-11-28 05:09:34,710 INFO L175 Difference]: Start difference. First operand has 525 places, 526 transitions, 9828 flow. Second operand 24 states and 163 transitions. [2024-11-28 05:09:34,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 548 places, 570 transitions, 12861 flow [2024-11-28 05:09:37,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 529 places, 570 transitions, 12682 flow, removed 15 selfloop flow, removed 19 redundant places. [2024-11-28 05:09:37,401 INFO L231 Difference]: Finished difference. Result has 534 places, 533 transitions, 10180 flow [2024-11-28 05:09:37,401 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=9649, PETRI_DIFFERENCE_MINUEND_PLACES=506, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=526, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=464, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=10180, PETRI_PLACES=534, PETRI_TRANSITIONS=533} [2024-11-28 05:09:37,402 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 512 predicate places. [2024-11-28 05:09:37,402 INFO L471 AbstractCegarLoop]: Abstraction has has 534 places, 533 transitions, 10180 flow [2024-11-28 05:09:37,402 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 4.741935483870968) internal successors, (147), 31 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:09:37,402 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:09:37,402 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:09:37,409 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Ended with exit code 0 [2024-11-28 05:09:37,602 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2024-11-28 05:09:37,603 INFO L396 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:09:37,603 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:09:37,603 INFO L85 PathProgramCache]: Analyzing trace with hash -1752600321, now seen corresponding path program 105 times [2024-11-28 05:09:37,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:09:37,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041791990] [2024-11-28 05:09:37,603 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 05:09:37,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:09:37,629 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-28 05:09:37,629 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:09:38,083 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-28 05:09:38,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:09:38,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041791990] [2024-11-28 05:09:38,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041791990] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:09:38,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703109526] [2024-11-28 05:09:38,083 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 05:09:38,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:09:38,083 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:09:38,085 INFO L229 MonitoredProcess]: Starting monitored process 108 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:09:38,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2024-11-28 05:09:38,563 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-28 05:09:38,563 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:09:38,564 INFO L256 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-11-28 05:09:38,566 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:09:38,844 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:09:38,844 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 30 [2024-11-28 05:09:38,903 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-28 05:09:38,903 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:09:39,110 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-11-28 05:09:39,110 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 83 [2024-11-28 05:09:39,225 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:09:39,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703109526] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:09:39,225 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:09:39,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 26 [2024-11-28 05:09:39,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103609238] [2024-11-28 05:09:39,225 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:09:39,226 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-28 05:09:39,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:09:39,226 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-28 05:09:39,226 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2024-11-28 05:09:39,226 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 05:09:39,226 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 534 places, 533 transitions, 10180 flow. Second operand has 26 states, 26 states have (on average 4.846153846153846) internal successors, (126), 26 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:09:39,226 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:09:39,226 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 05:09:39,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:09:42,026 INFO L124 PetriNetUnfolderBase]: 2088/3929 cut-off events. [2024-11-28 05:09:42,026 INFO L125 PetriNetUnfolderBase]: For 624142/624142 co-relation queries the response was YES. [2024-11-28 05:09:42,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60195 conditions, 3929 events. 2088/3929 cut-off events. For 624142/624142 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 27226 event pairs, 854 based on Foata normal form. 34/3961 useless extension candidates. Maximal degree in co-relation 59983. Up to 3373 conditions per place. [2024-11-28 05:09:42,096 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 524 selfloop transitions, 87 changer transitions 7/619 dead transitions. [2024-11-28 05:09:42,096 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 561 places, 619 transitions, 15021 flow [2024-11-28 05:09:42,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-28 05:09:42,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-11-28 05:09:42,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 211 transitions. [2024-11-28 05:09:42,097 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3425324675324675 [2024-11-28 05:09:42,097 INFO L175 Difference]: Start difference. First operand has 534 places, 533 transitions, 10180 flow. Second operand 28 states and 211 transitions. [2024-11-28 05:09:42,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 561 places, 619 transitions, 15021 flow [2024-11-28 05:09:44,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 544 places, 619 transitions, 14592 flow, removed 160 selfloop flow, removed 17 redundant places. [2024-11-28 05:09:44,950 INFO L231 Difference]: Finished difference. Result has 550 places, 552 transitions, 11104 flow [2024-11-28 05:09:44,950 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=9815, PETRI_DIFFERENCE_MINUEND_PLACES=517, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=531, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=459, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=11104, PETRI_PLACES=550, PETRI_TRANSITIONS=552} [2024-11-28 05:09:44,951 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 528 predicate places. [2024-11-28 05:09:44,951 INFO L471 AbstractCegarLoop]: Abstraction has has 550 places, 552 transitions, 11104 flow [2024-11-28 05:09:44,951 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.846153846153846) internal successors, (126), 26 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:09:44,951 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:09:44,951 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:09:44,958 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Ended with exit code 0 [2024-11-28 05:09:45,151 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2024-11-28 05:09:45,151 INFO L396 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:09:45,152 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:09:45,152 INFO L85 PathProgramCache]: Analyzing trace with hash 276750169, now seen corresponding path program 106 times [2024-11-28 05:09:45,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:09:45,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069010382] [2024-11-28 05:09:45,152 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 05:09:45,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:09:45,176 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 05:09:45,176 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:09:45,897 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-28 05:09:45,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:09:45,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069010382] [2024-11-28 05:09:45,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069010382] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:09:45,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939117045] [2024-11-28 05:09:45,898 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 05:09:45,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:09:45,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:09:45,899 INFO L229 MonitoredProcess]: Starting monitored process 109 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:09:45,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2024-11-28 05:09:46,381 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 05:09:46,381 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:09:46,383 INFO L256 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-28 05:09:46,385 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:09:46,536 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:09:46,536 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 34 [2024-11-28 05:09:46,588 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:09:46,588 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:09:46,758 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-11-28 05:09:46,758 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2024-11-28 05:09:46,866 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:09:46,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939117045] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:09:46,866 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:09:46,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 9] total 29 [2024-11-28 05:09:46,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297927229] [2024-11-28 05:09:46,866 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:09:46,866 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-28 05:09:46,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:09:46,867 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-28 05:09:46,867 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=706, Unknown=0, NotChecked=0, Total=812 [2024-11-28 05:09:46,867 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 05:09:46,867 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 550 places, 552 transitions, 11104 flow. Second operand has 29 states, 29 states have (on average 4.689655172413793) internal successors, (136), 29 states have internal predecessors, (136), 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) [2024-11-28 05:09:46,867 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:09:46,867 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 05:09:46,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:09:49,419 INFO L124 PetriNetUnfolderBase]: 2100/3948 cut-off events. [2024-11-28 05:09:49,419 INFO L125 PetriNetUnfolderBase]: For 647054/647054 co-relation queries the response was YES. [2024-11-28 05:09:49,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61847 conditions, 3948 events. 2100/3948 cut-off events. For 647054/647054 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 27404 event pairs, 932 based on Foata normal form. 8/3954 useless extension candidates. Maximal degree in co-relation 61628. Up to 3598 conditions per place. [2024-11-28 05:09:49,495 INFO L140 encePairwiseOnDemand]: 11/22 looper letters, 514 selfloop transitions, 80 changer transitions 6/601 dead transitions. [2024-11-28 05:09:49,496 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 572 places, 601 transitions, 13605 flow [2024-11-28 05:09:49,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-28 05:09:49,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-11-28 05:09:49,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 183 transitions. [2024-11-28 05:09:49,497 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3327272727272727 [2024-11-28 05:09:49,497 INFO L175 Difference]: Start difference. First operand has 550 places, 552 transitions, 11104 flow. Second operand 25 states and 183 transitions. [2024-11-28 05:09:49,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 572 places, 601 transitions, 13605 flow [2024-11-28 05:09:52,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 555 places, 601 transitions, 12919 flow, removed 307 selfloop flow, removed 17 redundant places. [2024-11-28 05:09:52,797 INFO L231 Difference]: Finished difference. Result has 558 places, 554 transitions, 10744 flow [2024-11-28 05:09:52,798 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=10438, PETRI_DIFFERENCE_MINUEND_PLACES=531, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=552, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=472, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=10744, PETRI_PLACES=558, PETRI_TRANSITIONS=554} [2024-11-28 05:09:52,798 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 536 predicate places. [2024-11-28 05:09:52,798 INFO L471 AbstractCegarLoop]: Abstraction has has 558 places, 554 transitions, 10744 flow [2024-11-28 05:09:52,798 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 4.689655172413793) internal successors, (136), 29 states have internal predecessors, (136), 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) [2024-11-28 05:09:52,798 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:09:52,798 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:09:52,805 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Ended with exit code 0 [2024-11-28 05:09:52,999 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2024-11-28 05:09:52,999 INFO L396 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:09:52,999 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:09:52,999 INFO L85 PathProgramCache]: Analyzing trace with hash -904188636, now seen corresponding path program 107 times [2024-11-28 05:09:53,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:09:53,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965212763] [2024-11-28 05:09:53,000 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 05:09:53,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:09:53,038 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-11-28 05:09:53,038 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:09:54,110 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:09:54,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:09:54,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965212763] [2024-11-28 05:09:54,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965212763] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:09:54,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028384396] [2024-11-28 05:09:54,110 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 05:09:54,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:09:54,110 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:09:54,112 INFO L229 MonitoredProcess]: Starting monitored process 110 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:09:54,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2024-11-28 05:09:54,766 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-11-28 05:09:54,766 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:09:54,769 INFO L256 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-11-28 05:09:54,770 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:09:55,272 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-28 05:09:55,272 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:09:55,599 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-11-28 05:09:55,599 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 83 [2024-11-28 05:09:55,789 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:09:55,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028384396] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:09:55,789 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:09:55,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 12, 10] total 41 [2024-11-28 05:09:55,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862889149] [2024-11-28 05:09:55,790 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:09:55,790 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-11-28 05:09:55,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:09:55,790 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-11-28 05:09:55,790 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=1462, Unknown=0, NotChecked=0, Total=1640 [2024-11-28 05:09:55,791 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 05:09:55,791 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 558 places, 554 transitions, 10744 flow. Second operand has 41 states, 41 states have (on average 4.634146341463414) internal successors, (190), 41 states have internal predecessors, (190), 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) [2024-11-28 05:09:55,791 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:09:55,791 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 05:09:55,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:09:58,399 INFO L124 PetriNetUnfolderBase]: 2175/4080 cut-off events. [2024-11-28 05:09:58,399 INFO L125 PetriNetUnfolderBase]: For 677756/677756 co-relation queries the response was YES. [2024-11-28 05:09:58,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63867 conditions, 4080 events. 2175/4080 cut-off events. For 677756/677756 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 28445 event pairs, 957 based on Foata normal form. 20/4098 useless extension candidates. Maximal degree in co-relation 63644. Up to 3716 conditions per place. [2024-11-28 05:09:58,483 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 551 selfloop transitions, 67 changer transitions 0/619 dead transitions. [2024-11-28 05:09:58,483 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 581 places, 619 transitions, 13700 flow [2024-11-28 05:09:58,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-28 05:09:58,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-11-28 05:09:58,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 179 transitions. [2024-11-28 05:09:58,484 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.32545454545454544 [2024-11-28 05:09:58,484 INFO L175 Difference]: Start difference. First operand has 558 places, 554 transitions, 10744 flow. Second operand 25 states and 179 transitions. [2024-11-28 05:09:58,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 581 places, 619 transitions, 13700 flow [2024-11-28 05:10:01,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 560 places, 619 transitions, 13495 flow, removed 28 selfloop flow, removed 21 redundant places. [2024-11-28 05:10:01,737 INFO L231 Difference]: Finished difference. Result has 567 places, 566 transitions, 11297 flow [2024-11-28 05:10:01,737 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=10539, PETRI_DIFFERENCE_MINUEND_PLACES=536, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=554, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=491, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=11297, PETRI_PLACES=567, PETRI_TRANSITIONS=566} [2024-11-28 05:10:01,737 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 545 predicate places. [2024-11-28 05:10:01,737 INFO L471 AbstractCegarLoop]: Abstraction has has 567 places, 566 transitions, 11297 flow [2024-11-28 05:10:01,737 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 4.634146341463414) internal successors, (190), 41 states have internal predecessors, (190), 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) [2024-11-28 05:10:01,737 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:10:01,738 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:10:01,745 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Ended with exit code 0 [2024-11-28 05:10:01,938 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2024-11-28 05:10:01,938 INFO L396 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:10:01,939 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:10:01,939 INFO L85 PathProgramCache]: Analyzing trace with hash -598070764, now seen corresponding path program 108 times [2024-11-28 05:10:01,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:10:01,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102061862] [2024-11-28 05:10:01,939 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 05:10:01,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:10:01,962 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-28 05:10:01,962 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:10:02,310 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-28 05:10:02,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:10:02,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102061862] [2024-11-28 05:10:02,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102061862] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:10:02,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891475490] [2024-11-28 05:10:02,310 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 05:10:02,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:10:02,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:10:02,312 INFO L229 MonitoredProcess]: Starting monitored process 111 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:10:02,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2024-11-28 05:10:02,795 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-28 05:10:02,795 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:10:02,797 INFO L256 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-11-28 05:10:02,798 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:10:03,105 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-11-28 05:10:03,105 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2024-11-28 05:10:03,126 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-28 05:10:03,126 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:10:03,282 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-11-28 05:10:03,282 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2024-11-28 05:10:03,428 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:10:03,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891475490] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:10:03,429 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:10:03,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 28 [2024-11-28 05:10:03,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690012305] [2024-11-28 05:10:03,429 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:10:03,429 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-28 05:10:03,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:10:03,429 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-28 05:10:03,429 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=644, Unknown=0, NotChecked=0, Total=756 [2024-11-28 05:10:03,429 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 05:10:03,430 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 567 places, 566 transitions, 11297 flow. Second operand has 28 states, 28 states have (on average 5.035714285714286) internal successors, (141), 28 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:10:03,430 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:10:03,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 05:10:03,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:10:05,843 INFO L124 PetriNetUnfolderBase]: 2210/4143 cut-off events. [2024-11-28 05:10:05,843 INFO L125 PetriNetUnfolderBase]: For 759124/759124 co-relation queries the response was YES. [2024-11-28 05:10:05,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66938 conditions, 4143 events. 2210/4143 cut-off events. For 759124/759124 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 29057 event pairs, 958 based on Foata normal form. 15/4156 useless extension candidates. Maximal degree in co-relation 66710. Up to 3738 conditions per place. [2024-11-28 05:10:05,939 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 561 selfloop transitions, 63 changer transitions 0/625 dead transitions. [2024-11-28 05:10:05,939 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 586 places, 625 transitions, 14216 flow [2024-11-28 05:10:05,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-28 05:10:05,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-11-28 05:10:05,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 157 transitions. [2024-11-28 05:10:05,940 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3568181818181818 [2024-11-28 05:10:05,940 INFO L175 Difference]: Start difference. First operand has 567 places, 566 transitions, 11297 flow. Second operand 20 states and 157 transitions. [2024-11-28 05:10:05,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 586 places, 625 transitions, 14216 flow [2024-11-28 05:10:09,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 568 places, 625 transitions, 13834 flow, removed 147 selfloop flow, removed 18 redundant places. [2024-11-28 05:10:09,529 INFO L231 Difference]: Finished difference. Result has 570 places, 569 transitions, 11301 flow [2024-11-28 05:10:09,529 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=10915, PETRI_DIFFERENCE_MINUEND_PLACES=549, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=566, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=504, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=11301, PETRI_PLACES=570, PETRI_TRANSITIONS=569} [2024-11-28 05:10:09,529 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 548 predicate places. [2024-11-28 05:10:09,529 INFO L471 AbstractCegarLoop]: Abstraction has has 570 places, 569 transitions, 11301 flow [2024-11-28 05:10:09,529 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 5.035714285714286) internal successors, (141), 28 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:10:09,529 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:10:09,529 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:10:09,538 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Forceful destruction successful, exit code 0 [2024-11-28 05:10:09,730 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,111 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:10:09,730 INFO L396 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:10:09,731 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:10:09,731 INFO L85 PathProgramCache]: Analyzing trace with hash 1652597212, now seen corresponding path program 109 times [2024-11-28 05:10:09,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:10:09,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663820450] [2024-11-28 05:10:09,731 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 05:10:09,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:10:09,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:10:10,636 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 2 proven. 25 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-28 05:10:10,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:10:10,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663820450] [2024-11-28 05:10:10,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663820450] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:10:10,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677260307] [2024-11-28 05:10:10,636 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 05:10:10,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:10:10,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:10:10,638 INFO L229 MonitoredProcess]: Starting monitored process 112 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:10:10,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2024-11-28 05:10:11,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:10:11,133 INFO L256 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-28 05:10:11,134 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:10:11,247 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:10:11,248 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 34 [2024-11-28 05:10:11,344 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:10:11,344 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:10:11,511 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-11-28 05:10:11,511 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2024-11-28 05:10:11,599 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:10:11,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677260307] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:10:11,599 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:10:11,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 9] total 30 [2024-11-28 05:10:11,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383531871] [2024-11-28 05:10:11,599 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:10:11,599 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-28 05:10:11,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:10:11,600 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-28 05:10:11,600 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=758, Unknown=0, NotChecked=0, Total=870 [2024-11-28 05:10:11,600 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 05:10:11,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 570 places, 569 transitions, 11301 flow. Second operand has 30 states, 30 states have (on average 4.666666666666667) internal successors, (140), 30 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:10:11,600 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:10:11,600 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 05:10:11,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:10:14,241 INFO L124 PetriNetUnfolderBase]: 2242/4214 cut-off events. [2024-11-28 05:10:14,241 INFO L125 PetriNetUnfolderBase]: For 826568/826568 co-relation queries the response was YES. [2024-11-28 05:10:14,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69284 conditions, 4214 events. 2242/4214 cut-off events. For 826568/826568 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 29716 event pairs, 922 based on Foata normal form. 10/4222 useless extension candidates. Maximal degree in co-relation 69054. Up to 3665 conditions per place. [2024-11-28 05:10:14,349 INFO L140 encePairwiseOnDemand]: 11/22 looper letters, 536 selfloop transitions, 91 changer transitions 6/634 dead transitions. [2024-11-28 05:10:14,349 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 594 places, 634 transitions, 14469 flow [2024-11-28 05:10:14,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-28 05:10:14,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-11-28 05:10:14,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 185 transitions. [2024-11-28 05:10:14,350 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.33636363636363636 [2024-11-28 05:10:14,350 INFO L175 Difference]: Start difference. First operand has 570 places, 569 transitions, 11301 flow. Second operand 25 states and 185 transitions. [2024-11-28 05:10:14,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 594 places, 634 transitions, 14469 flow [2024-11-28 05:10:18,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 580 places, 634 transitions, 14270 flow, removed 64 selfloop flow, removed 14 redundant places. [2024-11-28 05:10:18,340 INFO L231 Difference]: Finished difference. Result has 585 places, 573 transitions, 11731 flow [2024-11-28 05:10:18,340 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=11102, PETRI_DIFFERENCE_MINUEND_PLACES=556, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=569, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=479, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=11731, PETRI_PLACES=585, PETRI_TRANSITIONS=573} [2024-11-28 05:10:18,341 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 563 predicate places. [2024-11-28 05:10:18,341 INFO L471 AbstractCegarLoop]: Abstraction has has 585 places, 573 transitions, 11731 flow [2024-11-28 05:10:18,341 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 4.666666666666667) internal successors, (140), 30 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:10:18,341 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:10:18,341 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:10:18,348 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Ended with exit code 0 [2024-11-28 05:10:18,541 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,112 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:10:18,541 INFO L396 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:10:18,542 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:10:18,542 INFO L85 PathProgramCache]: Analyzing trace with hash 675808540, now seen corresponding path program 110 times [2024-11-28 05:10:18,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:10:18,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114395249] [2024-11-28 05:10:18,542 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:10:18,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:10:18,568 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:10:18,569 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:10:19,335 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 2 proven. 25 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-28 05:10:19,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:10:19,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114395249] [2024-11-28 05:10:19,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114395249] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:10:19,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132376180] [2024-11-28 05:10:19,335 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:10:19,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:10:19,335 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:10:19,337 INFO L229 MonitoredProcess]: Starting monitored process 113 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:10:19,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2024-11-28 05:10:19,832 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:10:19,832 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:10:19,834 INFO L256 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-28 05:10:19,835 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:10:20,025 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:10:20,025 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 34 [2024-11-28 05:10:20,128 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:10:20,128 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:10:20,385 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-11-28 05:10:20,386 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 83 [2024-11-28 05:10:20,523 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:10:20,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132376180] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:10:20,523 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:10:20,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 9] total 31 [2024-11-28 05:10:20,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152142121] [2024-11-28 05:10:20,523 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:10:20,524 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-28 05:10:20,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:10:20,524 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-28 05:10:20,524 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2024-11-28 05:10:20,524 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 05:10:20,524 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 585 places, 573 transitions, 11731 flow. Second operand has 31 states, 31 states have (on average 4.67741935483871) internal successors, (145), 31 states have internal predecessors, (145), 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) [2024-11-28 05:10:20,524 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:10:20,524 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 05:10:20,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:10:23,680 INFO L124 PetriNetUnfolderBase]: 2284/4297 cut-off events. [2024-11-28 05:10:23,680 INFO L125 PetriNetUnfolderBase]: For 920586/920586 co-relation queries the response was YES. [2024-11-28 05:10:23,765 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72615 conditions, 4297 events. 2284/4297 cut-off events. For 920586/920586 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 30516 event pairs, 963 based on Foata normal form. 10/4305 useless extension candidates. Maximal degree in co-relation 72377. Up to 3768 conditions per place. [2024-11-28 05:10:23,786 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 546 selfloop transitions, 89 changer transitions 6/642 dead transitions. [2024-11-28 05:10:23,786 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 609 places, 642 transitions, 14809 flow [2024-11-28 05:10:23,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-28 05:10:23,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-11-28 05:10:23,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 190 transitions. [2024-11-28 05:10:23,787 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3321678321678322 [2024-11-28 05:10:23,787 INFO L175 Difference]: Start difference. First operand has 585 places, 573 transitions, 11731 flow. Second operand 26 states and 190 transitions. [2024-11-28 05:10:23,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 609 places, 642 transitions, 14809 flow [2024-11-28 05:10:28,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 588 places, 642 transitions, 14293 flow, removed 180 selfloop flow, removed 21 redundant places. [2024-11-28 05:10:28,273 INFO L231 Difference]: Finished difference. Result has 594 places, 580 transitions, 11939 flow [2024-11-28 05:10:28,274 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=11223, PETRI_DIFFERENCE_MINUEND_PLACES=563, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=573, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=485, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=11939, PETRI_PLACES=594, PETRI_TRANSITIONS=580} [2024-11-28 05:10:28,274 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 572 predicate places. [2024-11-28 05:10:28,274 INFO L471 AbstractCegarLoop]: Abstraction has has 594 places, 580 transitions, 11939 flow [2024-11-28 05:10:28,274 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 4.67741935483871) internal successors, (145), 31 states have internal predecessors, (145), 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) [2024-11-28 05:10:28,274 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:10:28,274 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:10:28,281 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Ended with exit code 0 [2024-11-28 05:10:28,474 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2024-11-28 05:10:28,475 INFO L396 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:10:28,476 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:10:28,476 INFO L85 PathProgramCache]: Analyzing trace with hash -120144068, now seen corresponding path program 111 times [2024-11-28 05:10:28,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:10:28,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908144373] [2024-11-28 05:10:28,476 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 05:10:28,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:10:28,504 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-28 05:10:28,504 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:10:29,020 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-28 05:10:29,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:10:29,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908144373] [2024-11-28 05:10:29,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908144373] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:10:29,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574638551] [2024-11-28 05:10:29,021 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 05:10:29,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:10:29,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:10:29,022 INFO L229 MonitoredProcess]: Starting monitored process 114 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:10:29,024 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2024-11-28 05:10:29,520 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-28 05:10:29,520 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:10:29,522 INFO L256 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-11-28 05:10:29,523 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:10:29,840 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:10:29,840 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 30 [2024-11-28 05:10:29,905 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-28 05:10:29,905 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:10:30,115 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-11-28 05:10:30,115 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 73 treesize of output 94 [2024-11-28 05:10:30,258 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:10:30,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574638551] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:10:30,258 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:10:30,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 26 [2024-11-28 05:10:30,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947415254] [2024-11-28 05:10:30,259 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:10:30,259 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-28 05:10:30,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:10:30,259 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-28 05:10:30,259 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2024-11-28 05:10:30,259 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 05:10:30,259 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 594 places, 580 transitions, 11939 flow. Second operand has 26 states, 26 states have (on average 4.923076923076923) internal successors, (128), 26 states have internal predecessors, (128), 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) [2024-11-28 05:10:30,259 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:10:30,259 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 05:10:30,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:10:32,972 INFO L124 PetriNetUnfolderBase]: 2298/4336 cut-off events. [2024-11-28 05:10:32,972 INFO L125 PetriNetUnfolderBase]: For 976921/976921 co-relation queries the response was YES. [2024-11-28 05:10:33,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73294 conditions, 4336 events. 2298/4336 cut-off events. For 976921/976921 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 30853 event pairs, 1031 based on Foata normal form. 19/4353 useless extension candidates. Maximal degree in co-relation 73052. Up to 4003 conditions per place. [2024-11-28 05:10:33,071 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 563 selfloop transitions, 56 changer transitions 8/628 dead transitions. [2024-11-28 05:10:33,071 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 612 places, 628 transitions, 14607 flow [2024-11-28 05:10:33,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-28 05:10:33,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-11-28 05:10:33,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 157 transitions. [2024-11-28 05:10:33,072 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3568181818181818 [2024-11-28 05:10:33,072 INFO L175 Difference]: Start difference. First operand has 594 places, 580 transitions, 11939 flow. Second operand 20 states and 157 transitions. [2024-11-28 05:10:33,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 612 places, 628 transitions, 14607 flow [2024-11-28 05:10:37,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 589 places, 628 transitions, 14005 flow, removed 215 selfloop flow, removed 23 redundant places. [2024-11-28 05:10:37,506 INFO L231 Difference]: Finished difference. Result has 591 places, 578 transitions, 11624 flow [2024-11-28 05:10:37,506 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=11340, PETRI_DIFFERENCE_MINUEND_PLACES=570, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=578, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=522, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=11624, PETRI_PLACES=591, PETRI_TRANSITIONS=578} [2024-11-28 05:10:37,506 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 569 predicate places. [2024-11-28 05:10:37,506 INFO L471 AbstractCegarLoop]: Abstraction has has 591 places, 578 transitions, 11624 flow [2024-11-28 05:10:37,507 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.923076923076923) internal successors, (128), 26 states have internal predecessors, (128), 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) [2024-11-28 05:10:37,507 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:10:37,507 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:10:37,514 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Ended with exit code 0 [2024-11-28 05:10:37,707 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,114 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:10:37,707 INFO L396 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:10:37,708 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:10:37,708 INFO L85 PathProgramCache]: Analyzing trace with hash -1861549148, now seen corresponding path program 112 times [2024-11-28 05:10:37,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:10:37,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611643605] [2024-11-28 05:10:37,708 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 05:10:37,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:10:37,736 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 05:10:37,736 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:10:38,417 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-28 05:10:38,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:10:38,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611643605] [2024-11-28 05:10:38,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611643605] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:10:38,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897046335] [2024-11-28 05:10:38,418 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 05:10:38,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:10:38,418 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:10:38,420 INFO L229 MonitoredProcess]: Starting monitored process 115 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:10:38,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2024-11-28 05:10:38,932 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 05:10:38,933 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:10:38,934 INFO L256 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-28 05:10:38,935 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:10:39,046 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:10:39,047 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 34 [2024-11-28 05:10:39,125 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:10:39,125 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:10:39,302 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-11-28 05:10:39,302 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2024-11-28 05:10:39,402 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:10:39,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897046335] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:10:39,402 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:10:39,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 9] total 29 [2024-11-28 05:10:39,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939803926] [2024-11-28 05:10:39,402 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:10:39,403 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-28 05:10:39,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:10:39,403 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-28 05:10:39,403 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=708, Unknown=0, NotChecked=0, Total=812 [2024-11-28 05:10:39,403 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 05:10:39,403 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 591 places, 578 transitions, 11624 flow. Second operand has 29 states, 29 states have (on average 4.758620689655173) internal successors, (138), 29 states have internal predecessors, (138), 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) [2024-11-28 05:10:39,403 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:10:39,403 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 05:10:39,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:10:42,154 INFO L124 PetriNetUnfolderBase]: 2291/4307 cut-off events. [2024-11-28 05:10:42,154 INFO L125 PetriNetUnfolderBase]: For 902224/902224 co-relation queries the response was YES. [2024-11-28 05:10:42,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71330 conditions, 4307 events. 2291/4307 cut-off events. For 902224/902224 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 30481 event pairs, 948 based on Foata normal form. 15/4320 useless extension candidates. Maximal degree in co-relation 71089. Up to 3809 conditions per place. [2024-11-28 05:10:42,260 INFO L140 encePairwiseOnDemand]: 11/22 looper letters, 533 selfloop transitions, 101 changer transitions 2/637 dead transitions. [2024-11-28 05:10:42,260 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 612 places, 637 transitions, 14458 flow [2024-11-28 05:10:42,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-28 05:10:42,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-11-28 05:10:42,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 181 transitions. [2024-11-28 05:10:42,261 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3290909090909091 [2024-11-28 05:10:42,261 INFO L175 Difference]: Start difference. First operand has 591 places, 578 transitions, 11624 flow. Second operand 25 states and 181 transitions. [2024-11-28 05:10:42,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 612 places, 637 transitions, 14458 flow [2024-11-28 05:10:47,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 592 places, 637 transitions, 14077 flow, removed 102 selfloop flow, removed 20 redundant places. [2024-11-28 05:10:47,105 INFO L231 Difference]: Finished difference. Result has 594 places, 583 transitions, 11859 flow [2024-11-28 05:10:47,105 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=11252, PETRI_DIFFERENCE_MINUEND_PLACES=568, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=577, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=479, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=11859, PETRI_PLACES=594, PETRI_TRANSITIONS=583} [2024-11-28 05:10:47,106 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 572 predicate places. [2024-11-28 05:10:47,106 INFO L471 AbstractCegarLoop]: Abstraction has has 594 places, 583 transitions, 11859 flow [2024-11-28 05:10:47,106 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 4.758620689655173) internal successors, (138), 29 states have internal predecessors, (138), 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) [2024-11-28 05:10:47,106 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:10:47,106 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:10:47,116 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Ended with exit code 0 [2024-11-28 05:10:47,306 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,115 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:10:47,306 INFO L396 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:10:47,307 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:10:47,308 INFO L85 PathProgramCache]: Analyzing trace with hash -832780096, now seen corresponding path program 113 times [2024-11-28 05:10:47,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:10:47,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901065871] [2024-11-28 05:10:47,308 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 05:10:47,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:10:47,351 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-11-28 05:10:47,351 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:10:47,951 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 2 proven. 23 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-28 05:10:47,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:10:47,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901065871] [2024-11-28 05:10:47,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901065871] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:10:47,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435964134] [2024-11-28 05:10:47,951 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 05:10:47,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:10:47,951 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:10:47,953 INFO L229 MonitoredProcess]: Starting monitored process 116 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:10:47,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2024-11-28 05:10:48,680 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-11-28 05:10:48,680 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:10:48,682 INFO L256 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-11-28 05:10:48,683 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:10:49,007 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-28 05:10:49,007 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:10:49,236 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-11-28 05:10:49,236 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 83 [2024-11-28 05:10:49,322 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:10:49,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435964134] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:10:49,322 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:10:49,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 9] total 30 [2024-11-28 05:10:49,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389225487] [2024-11-28 05:10:49,322 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:10:49,322 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-28 05:10:49,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:10:49,323 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-28 05:10:49,323 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=764, Unknown=0, NotChecked=0, Total=870 [2024-11-28 05:10:49,323 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 05:10:49,323 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 594 places, 583 transitions, 11859 flow. Second operand has 30 states, 30 states have (on average 5.0) internal successors, (150), 30 states have internal predecessors, (150), 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) [2024-11-28 05:10:49,323 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:10:49,323 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 05:10:49,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:10:52,088 INFO L124 PetriNetUnfolderBase]: 2326/4362 cut-off events. [2024-11-28 05:10:52,088 INFO L125 PetriNetUnfolderBase]: For 867042/867042 co-relation queries the response was YES. [2024-11-28 05:10:52,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71297 conditions, 4362 events. 2326/4362 cut-off events. For 867042/867042 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 30928 event pairs, 1004 based on Foata normal form. 15/4375 useless extension candidates. Maximal degree in co-relation 71057. Up to 3982 conditions per place. [2024-11-28 05:10:52,185 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 569 selfloop transitions, 72 changer transitions 0/642 dead transitions. [2024-11-28 05:10:52,185 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 615 places, 642 transitions, 14375 flow [2024-11-28 05:10:52,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-28 05:10:52,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-11-28 05:10:52,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 164 transitions. [2024-11-28 05:10:52,186 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.33884297520661155 [2024-11-28 05:10:52,186 INFO L175 Difference]: Start difference. First operand has 594 places, 583 transitions, 11859 flow. Second operand 22 states and 164 transitions. [2024-11-28 05:10:52,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 615 places, 642 transitions, 14375 flow [2024-11-28 05:10:56,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 594 places, 642 transitions, 13921 flow, removed 136 selfloop flow, removed 21 redundant places. [2024-11-28 05:10:56,357 INFO L231 Difference]: Finished difference. Result has 597 places, 589 transitions, 11739 flow [2024-11-28 05:10:56,357 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=11405, PETRI_DIFFERENCE_MINUEND_PLACES=573, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=583, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=511, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=11739, PETRI_PLACES=597, PETRI_TRANSITIONS=589} [2024-11-28 05:10:56,358 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 575 predicate places. [2024-11-28 05:10:56,358 INFO L471 AbstractCegarLoop]: Abstraction has has 597 places, 589 transitions, 11739 flow [2024-11-28 05:10:56,358 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 5.0) internal successors, (150), 30 states have internal predecessors, (150), 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) [2024-11-28 05:10:56,358 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:10:56,358 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:10:56,365 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Ended with exit code 0 [2024-11-28 05:10:56,558 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable121 [2024-11-28 05:10:56,558 INFO L396 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:10:56,559 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:10:56,559 INFO L85 PathProgramCache]: Analyzing trace with hash 1456629476, now seen corresponding path program 114 times [2024-11-28 05:10:56,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:10:56,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65352437] [2024-11-28 05:10:56,559 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 05:10:56,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:10:56,604 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-11-28 05:10:56,604 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:10:57,074 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-28 05:10:57,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:10:57,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65352437] [2024-11-28 05:10:57,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65352437] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:10:57,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113004450] [2024-11-28 05:10:57,075 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 05:10:57,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:10:57,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:10:57,077 INFO L229 MonitoredProcess]: Starting monitored process 117 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:10:57,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2024-11-28 05:10:57,597 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-11-28 05:10:57,598 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:10:57,600 INFO L256 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-11-28 05:10:57,601 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:10:57,989 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:10:57,990 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 41 [2024-11-28 05:10:58,058 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 1 proven. 25 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-28 05:10:58,058 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:10:58,279 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-11-28 05:10:58,279 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 83 [2024-11-28 05:10:58,424 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:10:58,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113004450] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:10:58,424 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:10:58,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15, 9] total 32 [2024-11-28 05:10:58,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832114803] [2024-11-28 05:10:58,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:10:58,424 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-28 05:10:58,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:10:58,425 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-28 05:10:58,425 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=883, Unknown=0, NotChecked=0, Total=992 [2024-11-28 05:10:58,425 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 05:10:58,425 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 597 places, 589 transitions, 11739 flow. Second operand has 32 states, 32 states have (on average 4.9375) internal successors, (158), 32 states have internal predecessors, (158), 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) [2024-11-28 05:10:58,425 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:10:58,425 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 05:10:58,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:11:01,564 INFO L124 PetriNetUnfolderBase]: 2339/4371 cut-off events. [2024-11-28 05:11:01,564 INFO L125 PetriNetUnfolderBase]: For 861100/861100 co-relation queries the response was YES. [2024-11-28 05:11:01,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71227 conditions, 4371 events. 2339/4371 cut-off events. For 861100/861100 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 30886 event pairs, 958 based on Foata normal form. 15/4384 useless extension candidates. Maximal degree in co-relation 70985. Up to 3834 conditions per place. [2024-11-28 05:11:01,667 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 551 selfloop transitions, 104 changer transitions 5/661 dead transitions. [2024-11-28 05:11:01,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 623 places, 661 transitions, 14603 flow [2024-11-28 05:11:01,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-28 05:11:01,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-11-28 05:11:01,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 206 transitions. [2024-11-28 05:11:01,668 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3344155844155844 [2024-11-28 05:11:01,668 INFO L175 Difference]: Start difference. First operand has 597 places, 589 transitions, 11739 flow. Second operand 28 states and 206 transitions. [2024-11-28 05:11:01,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 623 places, 661 transitions, 14603 flow [2024-11-28 05:11:06,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 600 places, 661 transitions, 14384 flow, removed 31 selfloop flow, removed 23 redundant places. [2024-11-28 05:11:06,716 INFO L231 Difference]: Finished difference. Result has 602 places, 594 transitions, 12042 flow [2024-11-28 05:11:06,717 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=11529, PETRI_DIFFERENCE_MINUEND_PLACES=573, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=588, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=489, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=12042, PETRI_PLACES=602, PETRI_TRANSITIONS=594} [2024-11-28 05:11:06,717 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 580 predicate places. [2024-11-28 05:11:06,717 INFO L471 AbstractCegarLoop]: Abstraction has has 602 places, 594 transitions, 12042 flow [2024-11-28 05:11:06,717 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 4.9375) internal successors, (158), 32 states have internal predecessors, (158), 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) [2024-11-28 05:11:06,717 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:11:06,717 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:11:06,725 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Forceful destruction successful, exit code 0 [2024-11-28 05:11:06,917 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122,117 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:11:06,918 INFO L396 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:11:06,919 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:11:06,919 INFO L85 PathProgramCache]: Analyzing trace with hash 1060480125, now seen corresponding path program 115 times [2024-11-28 05:11:06,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:11:06,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962756454] [2024-11-28 05:11:06,919 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 05:11:06,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:11:06,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:11:07,649 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-28 05:11:07,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:11:07,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962756454] [2024-11-28 05:11:07,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962756454] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:11:07,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765413697] [2024-11-28 05:11:07,649 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 05:11:07,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:11:07,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:11:07,651 INFO L229 MonitoredProcess]: Starting monitored process 118 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:11:07,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2024-11-28 05:11:08,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:11:08,168 INFO L256 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-28 05:11:08,169 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:11:08,339 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:11:08,339 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:11:08,512 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-11-28 05:11:08,512 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 73 treesize of output 94 [2024-11-28 05:11:08,603 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:11:08,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765413697] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:11:08,603 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:11:08,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 9] total 30 [2024-11-28 05:11:08,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943077838] [2024-11-28 05:11:08,604 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:11:08,604 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-28 05:11:08,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:11:08,604 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-28 05:11:08,604 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=769, Unknown=0, NotChecked=0, Total=870 [2024-11-28 05:11:08,604 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 05:11:08,605 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 602 places, 594 transitions, 12042 flow. Second operand has 30 states, 30 states have (on average 4.6) internal successors, (138), 30 states have internal predecessors, (138), 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) [2024-11-28 05:11:08,605 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:11:08,605 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 05:11:08,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:11:11,145 INFO L124 PetriNetUnfolderBase]: 2326/4348 cut-off events. [2024-11-28 05:11:11,145 INFO L125 PetriNetUnfolderBase]: For 855191/855191 co-relation queries the response was YES. [2024-11-28 05:11:11,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71070 conditions, 4348 events. 2326/4348 cut-off events. For 855191/855191 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 30714 event pairs, 1068 based on Foata normal form. 6/4352 useless extension candidates. Maximal degree in co-relation 70831. Up to 4142 conditions per place. [2024-11-28 05:11:11,243 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 541 selfloop transitions, 57 changer transitions 16/615 dead transitions. [2024-11-28 05:11:11,243 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 620 places, 615 transitions, 13477 flow [2024-11-28 05:11:11,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-28 05:11:11,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-11-28 05:11:11,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 133 transitions. [2024-11-28 05:11:11,244 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.2878787878787879 [2024-11-28 05:11:11,244 INFO L175 Difference]: Start difference. First operand has 602 places, 594 transitions, 12042 flow. Second operand 21 states and 133 transitions. [2024-11-28 05:11:11,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 620 places, 615 transitions, 13477 flow [2024-11-28 05:11:15,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 595 places, 615 transitions, 13097 flow, removed 89 selfloop flow, removed 25 redundant places. [2024-11-28 05:11:15,591 INFO L231 Difference]: Finished difference. Result has 597 places, 589 transitions, 11698 flow [2024-11-28 05:11:15,591 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=11655, PETRI_DIFFERENCE_MINUEND_PLACES=575, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=593, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=536, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=11698, PETRI_PLACES=597, PETRI_TRANSITIONS=589} [2024-11-28 05:11:15,591 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 575 predicate places. [2024-11-28 05:11:15,591 INFO L471 AbstractCegarLoop]: Abstraction has has 597 places, 589 transitions, 11698 flow [2024-11-28 05:11:15,591 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 4.6) internal successors, (138), 30 states have internal predecessors, (138), 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) [2024-11-28 05:11:15,591 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:11:15,591 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:11:15,600 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Forceful destruction successful, exit code 0 [2024-11-28 05:11:15,792 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2024-11-28 05:11:15,792 INFO L396 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:11:15,792 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:11:15,793 INFO L85 PathProgramCache]: Analyzing trace with hash 1643005076, now seen corresponding path program 116 times [2024-11-28 05:11:15,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:11:15,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87938563] [2024-11-28 05:11:15,793 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:11:15,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:11:15,819 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:11:15,819 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:11:16,534 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 3 proven. 20 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-28 05:11:16,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:11:16,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87938563] [2024-11-28 05:11:16,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87938563] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:11:16,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944448307] [2024-11-28 05:11:16,534 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:11:16,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:11:16,534 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:11:16,536 INFO L229 MonitoredProcess]: Starting monitored process 119 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:11:16,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2024-11-28 05:11:17,063 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:11:17,063 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:11:17,065 INFO L256 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-28 05:11:17,066 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:11:17,285 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:11:17,286 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:11:17,489 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-11-28 05:11:17,490 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 73 treesize of output 94 [2024-11-28 05:11:17,651 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:11:17,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944448307] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:11:17,651 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:11:17,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 9] total 31 [2024-11-28 05:11:17,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580672071] [2024-11-28 05:11:17,651 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:11:17,651 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-28 05:11:17,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:11:17,652 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-28 05:11:17,652 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=805, Unknown=0, NotChecked=0, Total=930 [2024-11-28 05:11:17,652 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 05:11:17,652 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 597 places, 589 transitions, 11698 flow. Second operand has 31 states, 31 states have (on average 4.67741935483871) internal successors, (145), 31 states have internal predecessors, (145), 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) [2024-11-28 05:11:17,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:11:17,652 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 05:11:17,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:11:20,200 INFO L124 PetriNetUnfolderBase]: 2316/4334 cut-off events. [2024-11-28 05:11:20,200 INFO L125 PetriNetUnfolderBase]: For 848891/848891 co-relation queries the response was YES. [2024-11-28 05:11:20,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70183 conditions, 4334 events. 2316/4334 cut-off events. For 848891/848891 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 30586 event pairs, 1067 based on Foata normal form. 4/4336 useless extension candidates. Maximal degree in co-relation 69943. Up to 4132 conditions per place. [2024-11-28 05:11:20,303 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 548 selfloop transitions, 58 changer transitions 10/617 dead transitions. [2024-11-28 05:11:20,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 609 places, 617 transitions, 13517 flow [2024-11-28 05:11:20,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-28 05:11:20,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-11-28 05:11:20,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 136 transitions. [2024-11-28 05:11:20,304 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.2943722943722944 [2024-11-28 05:11:20,304 INFO L175 Difference]: Start difference. First operand has 597 places, 589 transitions, 11698 flow. Second operand 21 states and 136 transitions. [2024-11-28 05:11:20,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 609 places, 617 transitions, 13517 flow [2024-11-28 05:11:24,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 592 places, 617 transitions, 13397 flow, removed 2 selfloop flow, removed 17 redundant places. [2024-11-28 05:11:24,448 INFO L231 Difference]: Finished difference. Result has 597 places, 591 transitions, 11859 flow [2024-11-28 05:11:24,448 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=11580, PETRI_DIFFERENCE_MINUEND_PLACES=572, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=589, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=532, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=11859, PETRI_PLACES=597, PETRI_TRANSITIONS=591} [2024-11-28 05:11:24,448 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 575 predicate places. [2024-11-28 05:11:24,448 INFO L471 AbstractCegarLoop]: Abstraction has has 597 places, 591 transitions, 11859 flow [2024-11-28 05:11:24,448 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 4.67741935483871) internal successors, (145), 31 states have internal predecessors, (145), 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) [2024-11-28 05:11:24,448 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:11:24,448 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:11:24,456 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Ended with exit code 0 [2024-11-28 05:11:24,649 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124,119 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:11:24,649 INFO L396 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:11:24,650 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:11:24,650 INFO L85 PathProgramCache]: Analyzing trace with hash 500146601, now seen corresponding path program 117 times [2024-11-28 05:11:24,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:11:24,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109788137] [2024-11-28 05:11:24,650 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 05:11:24,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:11:24,674 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 05:11:24,674 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:11:25,129 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-28 05:11:25,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:11:25,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109788137] [2024-11-28 05:11:25,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109788137] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:11:25,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188326945] [2024-11-28 05:11:25,130 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 05:11:25,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:11:25,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:11:25,131 INFO L229 MonitoredProcess]: Starting monitored process 120 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:11:25,133 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2024-11-28 05:11:25,642 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 05:11:25,642 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:11:25,644 INFO L256 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-28 05:11:25,645 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:11:25,853 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:11:25,853 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:11:26,038 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-11-28 05:11:26,039 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 73 treesize of output 94 [2024-11-28 05:11:26,169 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:11:26,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188326945] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:11:26,169 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:11:26,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 26 [2024-11-28 05:11:26,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949274934] [2024-11-28 05:11:26,169 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:11:26,169 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-28 05:11:26,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:11:26,170 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-28 05:11:26,170 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=571, Unknown=0, NotChecked=0, Total=650 [2024-11-28 05:11:26,170 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 05:11:26,170 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 597 places, 591 transitions, 11859 flow. Second operand has 26 states, 26 states have (on average 4.923076923076923) internal successors, (128), 26 states have internal predecessors, (128), 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) [2024-11-28 05:11:26,170 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:11:26,170 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 05:11:26,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:11:28,838 INFO L124 PetriNetUnfolderBase]: 2307/4316 cut-off events. [2024-11-28 05:11:28,838 INFO L125 PetriNetUnfolderBase]: For 886214/886214 co-relation queries the response was YES. [2024-11-28 05:11:28,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70645 conditions, 4316 events. 2307/4316 cut-off events. For 886214/886214 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 30387 event pairs, 1059 based on Foata normal form. 6/4320 useless extension candidates. Maximal degree in co-relation 70402. Up to 4116 conditions per place. [2024-11-28 05:11:28,946 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 553 selfloop transitions, 46 changer transitions 12/612 dead transitions. [2024-11-28 05:11:28,946 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 612 places, 612 transitions, 13248 flow [2024-11-28 05:11:28,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-28 05:11:28,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-11-28 05:11:28,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 126 transitions. [2024-11-28 05:11:28,947 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3014354066985646 [2024-11-28 05:11:28,947 INFO L175 Difference]: Start difference. First operand has 597 places, 591 transitions, 11859 flow. Second operand 19 states and 126 transitions. [2024-11-28 05:11:28,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 612 places, 612 transitions, 13248 flow [2024-11-28 05:11:34,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 594 places, 612 transitions, 12970 flow, removed 80 selfloop flow, removed 18 redundant places. [2024-11-28 05:11:34,691 INFO L231 Difference]: Finished difference. Result has 595 places, 586 transitions, 11604 flow [2024-11-28 05:11:34,691 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=11571, PETRI_DIFFERENCE_MINUEND_PLACES=576, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=590, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=544, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=11604, PETRI_PLACES=595, PETRI_TRANSITIONS=586} [2024-11-28 05:11:34,692 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 573 predicate places. [2024-11-28 05:11:34,692 INFO L471 AbstractCegarLoop]: Abstraction has has 595 places, 586 transitions, 11604 flow [2024-11-28 05:11:34,692 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.923076923076923) internal successors, (128), 26 states have internal predecessors, (128), 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) [2024-11-28 05:11:34,692 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:11:34,692 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:11:34,699 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Ended with exit code 0 [2024-11-28 05:11:34,892 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2024-11-28 05:11:34,892 INFO L396 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:11:34,893 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:11:34,894 INFO L85 PathProgramCache]: Analyzing trace with hash -1727342057, now seen corresponding path program 118 times [2024-11-28 05:11:34,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:11:34,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249499696] [2024-11-28 05:11:34,894 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 05:11:34,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:11:34,923 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 05:11:34,924 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:11:35,737 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 2 proven. 25 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-28 05:11:35,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:11:35,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249499696] [2024-11-28 05:11:35,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249499696] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:11:35,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065271192] [2024-11-28 05:11:35,737 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 05:11:35,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:11:35,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:11:35,739 INFO L229 MonitoredProcess]: Starting monitored process 121 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:11:35,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2024-11-28 05:11:36,265 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 05:11:36,265 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:11:36,267 INFO L256 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-28 05:11:36,268 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:11:36,410 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:11:36,411 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 81 treesize of output 45 [2024-11-28 05:11:36,476 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:11:36,476 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:11:36,698 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-11-28 05:11:36,699 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 73 treesize of output 94 [2024-11-28 05:11:36,801 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:11:36,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065271192] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:11:36,801 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:11:36,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 9] total 30 [2024-11-28 05:11:36,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30964520] [2024-11-28 05:11:36,801 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:11:36,802 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-28 05:11:36,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:11:36,802 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-28 05:11:36,802 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=770, Unknown=0, NotChecked=0, Total=870 [2024-11-28 05:11:36,802 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 05:11:36,802 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 595 places, 586 transitions, 11604 flow. Second operand has 30 states, 30 states have (on average 4.733333333333333) internal successors, (142), 30 states have internal predecessors, (142), 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) [2024-11-28 05:11:36,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:11:36,802 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 05:11:36,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:11:39,819 INFO L124 PetriNetUnfolderBase]: 2287/4266 cut-off events. [2024-11-28 05:11:39,820 INFO L125 PetriNetUnfolderBase]: For 864710/864710 co-relation queries the response was YES. [2024-11-28 05:11:39,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69564 conditions, 4266 events. 2287/4266 cut-off events. For 864710/864710 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 29864 event pairs, 1035 based on Foata normal form. 6/4270 useless extension candidates. Maximal degree in co-relation 69372. Up to 4025 conditions per place. [2024-11-28 05:11:39,916 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 531 selfloop transitions, 74 changer transitions 6/612 dead transitions. [2024-11-28 05:11:39,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 614 places, 612 transitions, 13472 flow [2024-11-28 05:11:39,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-28 05:11:39,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-11-28 05:11:39,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 153 transitions. [2024-11-28 05:11:39,917 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.2897727272727273 [2024-11-28 05:11:39,917 INFO L175 Difference]: Start difference. First operand has 595 places, 586 transitions, 11604 flow. Second operand 24 states and 153 transitions. [2024-11-28 05:11:39,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 614 places, 612 transitions, 13472 flow [2024-11-28 05:11:44,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 598 places, 612 transitions, 13364 flow, removed 5 selfloop flow, removed 16 redundant places. [2024-11-28 05:11:44,304 INFO L231 Difference]: Finished difference. Result has 598 places, 582 transitions, 11607 flow [2024-11-28 05:11:44,305 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=11477, PETRI_DIFFERENCE_MINUEND_PLACES=575, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=584, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=510, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=11607, PETRI_PLACES=598, PETRI_TRANSITIONS=582} [2024-11-28 05:11:44,305 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 576 predicate places. [2024-11-28 05:11:44,305 INFO L471 AbstractCegarLoop]: Abstraction has has 598 places, 582 transitions, 11607 flow [2024-11-28 05:11:44,305 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 4.733333333333333) internal successors, (142), 30 states have internal predecessors, (142), 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) [2024-11-28 05:11:44,305 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:11:44,305 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:11:44,313 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Ended with exit code 0 [2024-11-28 05:11:44,506 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,121 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:11:44,506 INFO L396 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:11:44,507 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:11:44,507 INFO L85 PathProgramCache]: Analyzing trace with hash -1770237034, now seen corresponding path program 119 times [2024-11-28 05:11:44,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:11:44,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228295554] [2024-11-28 05:11:44,507 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 05:11:44,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:11:44,541 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-11-28 05:11:44,542 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:11:45,062 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 3 proven. 16 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-28 05:11:45,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:11:45,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228295554] [2024-11-28 05:11:45,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228295554] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:11:45,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727824803] [2024-11-28 05:11:45,062 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 05:11:45,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:11:45,062 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:11:45,066 INFO L229 MonitoredProcess]: Starting monitored process 122 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:11:45,070 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2024-11-28 05:11:45,809 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-11-28 05:11:45,809 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:11:45,812 INFO L256 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-11-28 05:11:45,813 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:11:46,174 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-28 05:11:46,174 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:11:46,404 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-11-28 05:11:46,404 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 73 treesize of output 94 [2024-11-28 05:11:46,521 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:11:46,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727824803] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:11:46,521 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:11:46,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 10] total 31 [2024-11-28 05:11:46,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625347842] [2024-11-28 05:11:46,521 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:11:46,522 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-28 05:11:46,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:11:46,522 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-28 05:11:46,522 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=817, Unknown=0, NotChecked=0, Total=930 [2024-11-28 05:11:46,522 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 05:11:46,522 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 598 places, 582 transitions, 11607 flow. Second operand has 31 states, 31 states have (on average 4.838709677419355) internal successors, (150), 31 states have internal predecessors, (150), 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) [2024-11-28 05:11:46,522 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:11:46,522 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 05:11:46,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:11:49,072 INFO L124 PetriNetUnfolderBase]: 2271/4212 cut-off events. [2024-11-28 05:11:49,072 INFO L125 PetriNetUnfolderBase]: For 863989/863989 co-relation queries the response was YES. [2024-11-28 05:11:49,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68979 conditions, 4212 events. 2271/4212 cut-off events. For 863989/863989 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 29245 event pairs, 1022 based on Foata normal form. 6/4216 useless extension candidates. Maximal degree in co-relation 68787. Up to 3994 conditions per place. [2024-11-28 05:11:49,174 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 541 selfloop transitions, 53 changer transitions 12/607 dead transitions. [2024-11-28 05:11:49,174 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 614 places, 607 transitions, 13255 flow [2024-11-28 05:11:49,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-28 05:11:49,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-11-28 05:11:49,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 138 transitions. [2024-11-28 05:11:49,175 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.31363636363636366 [2024-11-28 05:11:49,175 INFO L175 Difference]: Start difference. First operand has 598 places, 582 transitions, 11607 flow. Second operand 20 states and 138 transitions. [2024-11-28 05:11:49,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 614 places, 607 transitions, 13255 flow [2024-11-28 05:11:54,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 592 places, 607 transitions, 13046 flow, removed 15 selfloop flow, removed 22 redundant places. [2024-11-28 05:11:54,220 INFO L231 Difference]: Finished difference. Result has 594 places, 575 transitions, 11545 flow [2024-11-28 05:11:54,221 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=11344, PETRI_DIFFERENCE_MINUEND_PLACES=573, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=578, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=525, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=11545, PETRI_PLACES=594, PETRI_TRANSITIONS=575} [2024-11-28 05:11:54,221 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 572 predicate places. [2024-11-28 05:11:54,221 INFO L471 AbstractCegarLoop]: Abstraction has has 594 places, 575 transitions, 11545 flow [2024-11-28 05:11:54,221 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 4.838709677419355) internal successors, (150), 31 states have internal predecessors, (150), 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) [2024-11-28 05:11:54,221 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:11:54,221 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:11:54,230 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Ended with exit code 0 [2024-11-28 05:11:54,422 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2024-11-28 05:11:54,422 INFO L396 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:11:54,423 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:11:54,423 INFO L85 PathProgramCache]: Analyzing trace with hash -1245045330, now seen corresponding path program 120 times [2024-11-28 05:11:54,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:11:54,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860791417] [2024-11-28 05:11:54,423 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 05:11:54,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:11:54,461 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-11-28 05:11:54,462 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:11:54,957 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-28 05:11:54,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:11:54,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860791417] [2024-11-28 05:11:54,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860791417] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:11:54,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080873366] [2024-11-28 05:11:54,958 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 05:11:54,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:11:54,958 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:11:54,960 INFO L229 MonitoredProcess]: Starting monitored process 123 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:11:54,961 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2024-11-28 05:11:55,516 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-11-28 05:11:55,516 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:11:55,518 INFO L256 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 54 conjuncts are in the unsatisfiable core [2024-11-28 05:11:55,520 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:11:55,932 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:11:55,933 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 30 [2024-11-28 05:11:56,041 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 1 proven. 25 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-28 05:11:56,042 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:11:56,254 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-11-28 05:11:56,255 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2024-11-28 05:11:56,437 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:11:56,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080873366] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:11:56,437 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:11:56,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15, 10] total 33 [2024-11-28 05:11:56,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352706374] [2024-11-28 05:11:56,437 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:11:56,437 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-28 05:11:56,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:11:56,438 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-28 05:11:56,438 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=917, Unknown=0, NotChecked=0, Total=1056 [2024-11-28 05:11:56,438 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 05:11:56,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 594 places, 575 transitions, 11545 flow. Second operand has 33 states, 33 states have (on average 4.757575757575758) internal successors, (157), 33 states have internal predecessors, (157), 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) [2024-11-28 05:11:56,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:11:56,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 05:11:56,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:11:59,319 INFO L124 PetriNetUnfolderBase]: 2254/4177 cut-off events. [2024-11-28 05:11:59,319 INFO L125 PetriNetUnfolderBase]: For 895465/895465 co-relation queries the response was YES. [2024-11-28 05:11:59,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68531 conditions, 4177 events. 2254/4177 cut-off events. For 895465/895465 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 28852 event pairs, 954 based on Foata normal form. 22/4197 useless extension candidates. Maximal degree in co-relation 68337. Up to 3819 conditions per place. [2024-11-28 05:11:59,417 INFO L140 encePairwiseOnDemand]: 11/22 looper letters, 555 selfloop transitions, 73 changer transitions 10/639 dead transitions. [2024-11-28 05:11:59,417 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 611 places, 639 transitions, 15058 flow [2024-11-28 05:11:59,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-28 05:11:59,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-11-28 05:11:59,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 212 transitions. [2024-11-28 05:11:59,418 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.34415584415584416 [2024-11-28 05:11:59,418 INFO L175 Difference]: Start difference. First operand has 594 places, 575 transitions, 11545 flow. Second operand 28 states and 212 transitions. [2024-11-28 05:11:59,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 611 places, 639 transitions, 15058 flow [2024-11-28 05:12:04,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 596 places, 639 transitions, 14698 flow, removed 128 selfloop flow, removed 15 redundant places. [2024-11-28 05:12:04,311 INFO L231 Difference]: Finished difference. Result has 602 places, 573 transitions, 11444 flow [2024-11-28 05:12:04,311 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=11178, PETRI_DIFFERENCE_MINUEND_PLACES=569, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=572, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=500, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=11444, PETRI_PLACES=602, PETRI_TRANSITIONS=573} [2024-11-28 05:12:04,311 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 580 predicate places. [2024-11-28 05:12:04,311 INFO L471 AbstractCegarLoop]: Abstraction has has 602 places, 573 transitions, 11444 flow [2024-11-28 05:12:04,311 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 4.757575757575758) internal successors, (157), 33 states have internal predecessors, (157), 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) [2024-11-28 05:12:04,311 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:12:04,311 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:12:04,319 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Ended with exit code 0 [2024-11-28 05:12:04,512 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 123 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2024-11-28 05:12:04,512 INFO L396 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:12:04,513 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:12:04,513 INFO L85 PathProgramCache]: Analyzing trace with hash 36967355, now seen corresponding path program 121 times [2024-11-28 05:12:04,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:12:04,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739969844] [2024-11-28 05:12:04,513 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 05:12:04,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:12:04,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:12:05,204 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-28 05:12:05,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:12:05,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739969844] [2024-11-28 05:12:05,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739969844] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:12:05,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321110703] [2024-11-28 05:12:05,204 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 05:12:05,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:12:05,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:12:05,207 INFO L229 MonitoredProcess]: Starting monitored process 124 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:12:05,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2024-11-28 05:12:05,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:12:05,745 INFO L256 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-28 05:12:05,746 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:12:05,926 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-11-28 05:12:05,927 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 9 [2024-11-28 05:12:05,929 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:12:05,929 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:12:06,134 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-11-28 05:12:06,134 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 83 [2024-11-28 05:12:06,202 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:12:06,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321110703] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:12:06,202 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:12:06,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 9] total 29 [2024-11-28 05:12:06,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768079386] [2024-11-28 05:12:06,202 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:12:06,203 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-28 05:12:06,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:12:06,203 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-28 05:12:06,203 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=712, Unknown=0, NotChecked=0, Total=812 [2024-11-28 05:12:06,203 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 05:12:06,203 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 602 places, 573 transitions, 11444 flow. Second operand has 29 states, 29 states have (on average 4.758620689655173) internal successors, (138), 29 states have internal predecessors, (138), 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) [2024-11-28 05:12:06,203 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:12:06,203 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 05:12:06,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:12:08,864 INFO L124 PetriNetUnfolderBase]: 2237/4109 cut-off events. [2024-11-28 05:12:08,865 INFO L125 PetriNetUnfolderBase]: For 947247/947247 co-relation queries the response was YES. [2024-11-28 05:12:08,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68997 conditions, 4109 events. 2237/4109 cut-off events. For 947247/947247 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 28049 event pairs, 955 based on Foata normal form. 18/4125 useless extension candidates. Maximal degree in co-relation 68798. Up to 3819 conditions per place. [2024-11-28 05:12:08,950 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 531 selfloop transitions, 75 changer transitions 3/610 dead transitions. [2024-11-28 05:12:08,950 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 622 places, 610 transitions, 14612 flow [2024-11-28 05:12:08,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-28 05:12:08,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-11-28 05:12:08,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 167 transitions. [2024-11-28 05:12:08,951 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.30363636363636365 [2024-11-28 05:12:08,952 INFO L175 Difference]: Start difference. First operand has 602 places, 573 transitions, 11444 flow. Second operand 25 states and 167 transitions. [2024-11-28 05:12:08,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 622 places, 610 transitions, 14612 flow [2024-11-28 05:12:14,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 596 places, 610 transitions, 14324 flow, removed 70 selfloop flow, removed 26 redundant places. [2024-11-28 05:12:14,992 INFO L231 Difference]: Finished difference. Result has 598 places, 570 transitions, 11352 flow [2024-11-28 05:12:14,992 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=11063, PETRI_DIFFERENCE_MINUEND_PLACES=572, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=568, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=493, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=11352, PETRI_PLACES=598, PETRI_TRANSITIONS=570} [2024-11-28 05:12:14,993 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 576 predicate places. [2024-11-28 05:12:14,993 INFO L471 AbstractCegarLoop]: Abstraction has has 598 places, 570 transitions, 11352 flow [2024-11-28 05:12:14,993 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 4.758620689655173) internal successors, (138), 29 states have internal predecessors, (138), 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) [2024-11-28 05:12:14,993 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:12:14,993 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:12:15,000 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Ended with exit code 0 [2024-11-28 05:12:15,193 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2024-11-28 05:12:15,193 INFO L396 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:12:15,194 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:12:15,194 INFO L85 PathProgramCache]: Analyzing trace with hash -2122629885, now seen corresponding path program 122 times [2024-11-28 05:12:15,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:12:15,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85946101] [2024-11-28 05:12:15,194 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:12:15,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:12:15,222 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:12:15,222 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:12:16,122 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-28 05:12:16,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:12:16,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85946101] [2024-11-28 05:12:16,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85946101] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:12:16,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354849956] [2024-11-28 05:12:16,123 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:12:16,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:12:16,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:12:16,126 INFO L229 MonitoredProcess]: Starting monitored process 125 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:12:16,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2024-11-28 05:12:16,683 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:12:16,683 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:12:16,685 INFO L256 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-28 05:12:16,686 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:12:16,903 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:12:16,903 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:12:17,068 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-11-28 05:12:17,069 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2024-11-28 05:12:17,237 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:12:17,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354849956] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:12:17,237 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:12:17,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 9] total 31 [2024-11-28 05:12:17,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151155791] [2024-11-28 05:12:17,238 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:12:17,238 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-28 05:12:17,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:12:17,238 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-28 05:12:17,238 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=819, Unknown=0, NotChecked=0, Total=930 [2024-11-28 05:12:17,238 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 05:12:17,239 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 598 places, 570 transitions, 11352 flow. Second operand has 31 states, 31 states have (on average 4.741935483870968) internal successors, (147), 31 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:12:17,239 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:12:17,239 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 05:12:17,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:12:19,851 INFO L124 PetriNetUnfolderBase]: 2224/4081 cut-off events. [2024-11-28 05:12:19,851 INFO L125 PetriNetUnfolderBase]: For 930837/930837 co-relation queries the response was YES. [2024-11-28 05:12:19,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68149 conditions, 4081 events. 2224/4081 cut-off events. For 930837/930837 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 27734 event pairs, 985 based on Foata normal form. 6/4085 useless extension candidates. Maximal degree in co-relation 67952. Up to 3900 conditions per place. [2024-11-28 05:12:19,960 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 516 selfloop transitions, 61 changer transitions 12/590 dead transitions. [2024-11-28 05:12:19,961 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 617 places, 590 transitions, 12709 flow [2024-11-28 05:12:19,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-28 05:12:19,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-11-28 05:12:19,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 145 transitions. [2024-11-28 05:12:19,962 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.2865612648221344 [2024-11-28 05:12:19,962 INFO L175 Difference]: Start difference. First operand has 598 places, 570 transitions, 11352 flow. Second operand 23 states and 145 transitions. [2024-11-28 05:12:19,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 617 places, 590 transitions, 12709 flow [2024-11-28 05:12:25,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 593 places, 590 transitions, 12555 flow, removed 5 selfloop flow, removed 24 redundant places. [2024-11-28 05:12:25,657 INFO L231 Difference]: Finished difference. Result has 594 places, 565 transitions, 11263 flow [2024-11-28 05:12:25,657 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=11188, PETRI_DIFFERENCE_MINUEND_PLACES=571, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=569, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=508, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=11263, PETRI_PLACES=594, PETRI_TRANSITIONS=565} [2024-11-28 05:12:25,657 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 572 predicate places. [2024-11-28 05:12:25,657 INFO L471 AbstractCegarLoop]: Abstraction has has 594 places, 565 transitions, 11263 flow [2024-11-28 05:12:25,657 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 4.741935483870968) internal successors, (147), 31 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:12:25,657 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:12:25,657 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:12:25,665 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Forceful destruction successful, exit code 0 [2024-11-28 05:12:25,858 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,125 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:12:25,858 INFO L396 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:12:25,858 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:12:25,858 INFO L85 PathProgramCache]: Analyzing trace with hash -750553385, now seen corresponding path program 123 times [2024-11-28 05:12:25,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:12:25,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731596719] [2024-11-28 05:12:25,859 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 05:12:25,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:12:25,891 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-28 05:12:25,891 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:12:26,353 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-28 05:12:26,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:12:26,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731596719] [2024-11-28 05:12:26,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731596719] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:12:26,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264494072] [2024-11-28 05:12:26,354 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 05:12:26,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:12:26,354 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:12:26,358 INFO L229 MonitoredProcess]: Starting monitored process 126 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:12:26,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2024-11-28 05:12:26,901 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-28 05:12:26,901 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:12:26,903 INFO L256 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-11-28 05:12:26,904 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:12:27,156 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:12:27,157 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 30 [2024-11-28 05:12:27,226 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-28 05:12:27,226 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:12:27,378 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-11-28 05:12:27,378 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2024-11-28 05:12:27,526 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:12:27,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264494072] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:12:27,526 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:12:27,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 26 [2024-11-28 05:12:27,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113118839] [2024-11-28 05:12:27,527 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:12:27,527 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-28 05:12:27,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:12:27,527 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-28 05:12:27,527 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2024-11-28 05:12:27,527 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 05:12:27,528 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 594 places, 565 transitions, 11263 flow. Second operand has 26 states, 26 states have (on average 4.923076923076923) internal successors, (128), 26 states have internal predecessors, (128), 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) [2024-11-28 05:12:27,528 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:12:27,528 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 05:12:27,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:12:29,910 INFO L124 PetriNetUnfolderBase]: 2204/4031 cut-off events. [2024-11-28 05:12:29,911 INFO L125 PetriNetUnfolderBase]: For 910718/910718 co-relation queries the response was YES. [2024-11-28 05:12:29,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67161 conditions, 4031 events. 2204/4031 cut-off events. For 910718/910718 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 27205 event pairs, 963 based on Foata normal form. 6/4035 useless extension candidates. Maximal degree in co-relation 66965. Up to 3820 conditions per place. [2024-11-28 05:12:30,015 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 533 selfloop transitions, 54 changer transitions 6/594 dead transitions. [2024-11-28 05:12:30,015 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 607 places, 594 transitions, 13292 flow [2024-11-28 05:12:30,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-28 05:12:30,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-11-28 05:12:30,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 141 transitions. [2024-11-28 05:12:30,016 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3051948051948052 [2024-11-28 05:12:30,016 INFO L175 Difference]: Start difference. First operand has 594 places, 565 transitions, 11263 flow. Second operand 21 states and 141 transitions. [2024-11-28 05:12:30,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 607 places, 594 transitions, 13292 flow [2024-11-28 05:12:35,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 586 places, 594 transitions, 13145 flow, removed 11 selfloop flow, removed 21 redundant places. [2024-11-28 05:12:35,436 INFO L231 Difference]: Finished difference. Result has 586 places, 561 transitions, 11193 flow [2024-11-28 05:12:35,437 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=11106, PETRI_DIFFERENCE_MINUEND_PLACES=566, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=563, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=509, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=11193, PETRI_PLACES=586, PETRI_TRANSITIONS=561} [2024-11-28 05:12:35,437 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 564 predicate places. [2024-11-28 05:12:35,437 INFO L471 AbstractCegarLoop]: Abstraction has has 586 places, 561 transitions, 11193 flow [2024-11-28 05:12:35,437 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.923076923076923) internal successors, (128), 26 states have internal predecessors, (128), 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) [2024-11-28 05:12:35,437 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:12:35,437 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:12:35,446 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Ended with exit code 0 [2024-11-28 05:12:35,637 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,126 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:12:35,638 INFO L396 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:12:35,639 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:12:35,639 INFO L85 PathProgramCache]: Analyzing trace with hash 1508654283, now seen corresponding path program 124 times [2024-11-28 05:12:35,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:12:35,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506544254] [2024-11-28 05:12:35,639 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 05:12:35,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:12:35,661 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 05:12:35,661 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:12:36,342 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-28 05:12:36,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:12:36,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506544254] [2024-11-28 05:12:36,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506544254] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:12:36,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746539176] [2024-11-28 05:12:36,342 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 05:12:36,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:12:36,343 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:12:36,344 INFO L229 MonitoredProcess]: Starting monitored process 127 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:12:36,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2024-11-28 05:12:36,890 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 05:12:36,891 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:12:36,892 INFO L256 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-28 05:12:36,894 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:12:37,088 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-11-28 05:12:37,089 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 9 [2024-11-28 05:12:37,091 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:12:37,091 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:12:37,305 INFO L349 Elim1Store]: treesize reduction 28, result has 61.6 percent of original size [2024-11-28 05:12:37,306 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 52 [2024-11-28 05:12:37,319 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:12:37,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746539176] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:12:37,319 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:12:37,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 9] total 28 [2024-11-28 05:12:37,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829372722] [2024-11-28 05:12:37,319 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:12:37,320 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-28 05:12:37,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:12:37,320 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-28 05:12:37,320 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=660, Unknown=0, NotChecked=0, Total=756 [2024-11-28 05:12:37,320 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 05:12:37,320 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 586 places, 561 transitions, 11193 flow. Second operand has 28 states, 28 states have (on average 4.75) internal successors, (133), 28 states have internal predecessors, (133), 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) [2024-11-28 05:12:37,320 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:12:37,320 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 05:12:37,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:12:39,839 INFO L124 PetriNetUnfolderBase]: 2208/4033 cut-off events. [2024-11-28 05:12:39,839 INFO L125 PetriNetUnfolderBase]: For 901433/901433 co-relation queries the response was YES. [2024-11-28 05:12:39,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67172 conditions, 4033 events. 2208/4033 cut-off events. For 901433/901433 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 27265 event pairs, 180 based on Foata normal form. 4/4035 useless extension candidates. Maximal degree in co-relation 66978. Up to 2164 conditions per place. [2024-11-28 05:12:39,914 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 405 selfloop transitions, 198 changer transitions 1/605 dead transitions. [2024-11-28 05:12:39,914 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 602 places, 605 transitions, 14440 flow [2024-11-28 05:12:39,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-28 05:12:39,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-11-28 05:12:39,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 135 transitions. [2024-11-28 05:12:39,915 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3068181818181818 [2024-11-28 05:12:39,915 INFO L175 Difference]: Start difference. First operand has 586 places, 561 transitions, 11193 flow. Second operand 20 states and 135 transitions. [2024-11-28 05:12:39,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 602 places, 605 transitions, 14440 flow [2024-11-28 05:12:44,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 582 places, 605 transitions, 14279 flow, removed 8 selfloop flow, removed 20 redundant places. [2024-11-28 05:12:44,150 INFO L231 Difference]: Finished difference. Result has 583 places, 562 transitions, 11501 flow [2024-11-28 05:12:44,150 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=11034, PETRI_DIFFERENCE_MINUEND_PLACES=563, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=561, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=197, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=363, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=11501, PETRI_PLACES=583, PETRI_TRANSITIONS=562} [2024-11-28 05:12:44,150 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 561 predicate places. [2024-11-28 05:12:44,150 INFO L471 AbstractCegarLoop]: Abstraction has has 583 places, 562 transitions, 11501 flow [2024-11-28 05:12:44,150 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 4.75) internal successors, (133), 28 states have internal predecessors, (133), 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) [2024-11-28 05:12:44,150 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:12:44,150 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:12:44,158 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Forceful destruction successful, exit code 0 [2024-11-28 05:12:44,351 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,127 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:12:44,351 INFO L396 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:12:44,351 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:12:44,352 INFO L85 PathProgramCache]: Analyzing trace with hash -777399200, now seen corresponding path program 125 times [2024-11-28 05:12:44,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:12:44,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752293842] [2024-11-28 05:12:44,352 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 05:12:44,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:12:44,388 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-11-28 05:12:44,388 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:12:45,578 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:12:45,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:12:45,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752293842] [2024-11-28 05:12:45,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752293842] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:12:45,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792789712] [2024-11-28 05:12:45,578 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 05:12:45,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:12:45,579 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:12:45,580 INFO L229 MonitoredProcess]: Starting monitored process 128 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:12:45,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2024-11-28 05:12:46,285 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-11-28 05:12:46,285 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:12:46,288 INFO L256 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 46 conjuncts are in the unsatisfiable core [2024-11-28 05:12:46,289 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:12:46,346 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 19 treesize of output 1 [2024-11-28 05:12:46,686 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-28 05:12:46,687 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:12:47,006 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:12:47,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792789712] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:12:47,006 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:12:47,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 11, 9] total 39 [2024-11-28 05:12:47,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462650210] [2024-11-28 05:12:47,007 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:12:47,007 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-11-28 05:12:47,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:12:47,007 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-11-28 05:12:47,007 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1333, Unknown=0, NotChecked=0, Total=1482 [2024-11-28 05:12:47,007 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 05:12:47,008 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 583 places, 562 transitions, 11501 flow. Second operand has 39 states, 39 states have (on average 4.615384615384615) internal successors, (180), 39 states have internal predecessors, (180), 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) [2024-11-28 05:12:47,008 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:12:47,008 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 05:12:47,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:12:49,673 INFO L124 PetriNetUnfolderBase]: 2210/4045 cut-off events. [2024-11-28 05:12:49,673 INFO L125 PetriNetUnfolderBase]: For 914099/914099 co-relation queries the response was YES. [2024-11-28 05:12:49,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67834 conditions, 4045 events. 2210/4045 cut-off events. For 914099/914099 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 27596 event pairs, 485 based on Foata normal form. 2/4045 useless extension candidates. Maximal degree in co-relation 67639. Up to 2283 conditions per place. [2024-11-28 05:12:49,765 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 401 selfloop transitions, 197 changer transitions 16/615 dead transitions. [2024-11-28 05:12:49,765 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 596 places, 615 transitions, 14203 flow [2024-11-28 05:12:49,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-28 05:12:49,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-28 05:12:49,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 101 transitions. [2024-11-28 05:12:49,766 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.32792207792207795 [2024-11-28 05:12:49,766 INFO L175 Difference]: Start difference. First operand has 583 places, 562 transitions, 11501 flow. Second operand 14 states and 101 transitions. [2024-11-28 05:12:49,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 596 places, 615 transitions, 14203 flow [2024-11-28 05:12:54,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 578 places, 615 transitions, 13840 flow, removed 19 selfloop flow, removed 18 redundant places. [2024-11-28 05:12:54,300 INFO L231 Difference]: Finished difference. Result has 583 places, 564 transitions, 11872 flow [2024-11-28 05:12:54,301 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=11153, PETRI_DIFFERENCE_MINUEND_PLACES=565, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=562, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=195, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=11872, PETRI_PLACES=583, PETRI_TRANSITIONS=564} [2024-11-28 05:12:54,301 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 561 predicate places. [2024-11-28 05:12:54,301 INFO L471 AbstractCegarLoop]: Abstraction has has 583 places, 564 transitions, 11872 flow [2024-11-28 05:12:54,301 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 4.615384615384615) internal successors, (180), 39 states have internal predecessors, (180), 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) [2024-11-28 05:12:54,301 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:12:54,301 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:12:54,315 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Ended with exit code 0 [2024-11-28 05:12:54,502 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2024-11-28 05:12:54,502 INFO L396 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:12:54,504 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:12:54,504 INFO L85 PathProgramCache]: Analyzing trace with hash 1333283553, now seen corresponding path program 126 times [2024-11-28 05:12:54,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:12:54,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385447606] [2024-11-28 05:12:54,504 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 05:12:54,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:12:54,555 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-11-28 05:12:54,556 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:12:55,011 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-28 05:12:55,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:12:55,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385447606] [2024-11-28 05:12:55,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385447606] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:12:55,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106607994] [2024-11-28 05:12:55,011 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 05:12:55,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:12:55,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:12:55,013 INFO L229 MonitoredProcess]: Starting monitored process 129 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:12:55,016 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2024-11-28 05:12:55,575 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-11-28 05:12:55,576 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:12:55,578 INFO L256 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-11-28 05:12:55,579 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:12:55,869 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:12:55,869 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 30 [2024-11-28 05:12:55,943 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-28 05:12:55,943 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:12:56,191 INFO L349 Elim1Store]: treesize reduction 28, result has 61.6 percent of original size [2024-11-28 05:12:56,191 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 52 [2024-11-28 05:12:56,255 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:12:56,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106607994] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:12:56,255 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:12:56,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 28 [2024-11-28 05:12:56,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226843792] [2024-11-28 05:12:56,255 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:12:56,255 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-28 05:12:56,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:12:56,256 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-28 05:12:56,256 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=656, Unknown=0, NotChecked=0, Total=756 [2024-11-28 05:12:56,256 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 05:12:56,256 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 583 places, 564 transitions, 11872 flow. Second operand has 28 states, 28 states have (on average 4.892857142857143) internal successors, (137), 28 states have internal predecessors, (137), 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) [2024-11-28 05:12:56,256 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:12:56,256 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 05:12:56,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:12:59,713 INFO L124 PetriNetUnfolderBase]: 2252/4124 cut-off events. [2024-11-28 05:12:59,713 INFO L125 PetriNetUnfolderBase]: For 972093/972093 co-relation queries the response was YES. [2024-11-28 05:12:59,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71892 conditions, 4124 events. 2252/4124 cut-off events. For 972093/972093 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 28167 event pairs, 165 based on Foata normal form. 8/4130 useless extension candidates. Maximal degree in co-relation 71693. Up to 2133 conditions per place. [2024-11-28 05:12:59,809 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 441 selfloop transitions, 205 changer transitions 3/650 dead transitions. [2024-11-28 05:12:59,809 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 605 places, 650 transitions, 17301 flow [2024-11-28 05:12:59,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-28 05:12:59,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-11-28 05:12:59,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 200 transitions. [2024-11-28 05:12:59,810 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.34965034965034963 [2024-11-28 05:12:59,810 INFO L175 Difference]: Start difference. First operand has 583 places, 564 transitions, 11872 flow. Second operand 26 states and 200 transitions. [2024-11-28 05:12:59,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 605 places, 650 transitions, 17301 flow [2024-11-28 05:13:07,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 594 places, 650 transitions, 16201 flow, removed 437 selfloop flow, removed 11 redundant places. [2024-11-28 05:13:07,137 INFO L231 Difference]: Finished difference. Result has 598 places, 573 transitions, 12406 flow [2024-11-28 05:13:07,137 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=11412, PETRI_DIFFERENCE_MINUEND_PLACES=569, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=564, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=198, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=364, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=12406, PETRI_PLACES=598, PETRI_TRANSITIONS=573} [2024-11-28 05:13:07,137 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 576 predicate places. [2024-11-28 05:13:07,137 INFO L471 AbstractCegarLoop]: Abstraction has has 598 places, 573 transitions, 12406 flow [2024-11-28 05:13:07,137 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 4.892857142857143) internal successors, (137), 28 states have internal predecessors, (137), 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) [2024-11-28 05:13:07,137 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:13:07,138 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:13:07,150 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Forceful destruction successful, exit code 0 [2024-11-28 05:13:07,338 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2024-11-28 05:13:07,338 INFO L396 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:13:07,339 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:13:07,339 INFO L85 PathProgramCache]: Analyzing trace with hash 619014586, now seen corresponding path program 127 times [2024-11-28 05:13:07,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:13:07,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985499774] [2024-11-28 05:13:07,339 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 05:13:07,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:13:07,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:13:08,122 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-28 05:13:08,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:13:08,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985499774] [2024-11-28 05:13:08,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985499774] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:13:08,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452255966] [2024-11-28 05:13:08,122 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 05:13:08,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:13:08,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:13:08,124 INFO L229 MonitoredProcess]: Starting monitored process 130 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:13:08,125 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2024-11-28 05:13:08,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:13:08,691 INFO L256 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-28 05:13:08,691 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:13:08,845 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:13:08,845 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 34 [2024-11-28 05:13:08,905 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:13:08,905 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:13:09,109 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-11-28 05:13:09,109 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 73 treesize of output 94 [2024-11-28 05:13:09,183 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:13:09,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452255966] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:13:09,183 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:13:09,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 9] total 28 [2024-11-28 05:13:09,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491550258] [2024-11-28 05:13:09,183 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:13:09,183 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-28 05:13:09,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:13:09,184 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-28 05:13:09,184 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=660, Unknown=0, NotChecked=0, Total=756 [2024-11-28 05:13:09,184 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 05:13:09,184 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 598 places, 573 transitions, 12406 flow. Second operand has 28 states, 28 states have (on average 4.678571428571429) internal successors, (131), 28 states have internal predecessors, (131), 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) [2024-11-28 05:13:09,184 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:13:09,184 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 05:13:09,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:13:11,954 INFO L124 PetriNetUnfolderBase]: 2270/4168 cut-off events. [2024-11-28 05:13:11,955 INFO L125 PetriNetUnfolderBase]: For 594541/594541 co-relation queries the response was YES. [2024-11-28 05:13:12,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65697 conditions, 4168 events. 2270/4168 cut-off events. For 594541/594541 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 28581 event pairs, 817 based on Foata normal form. 10/4176 useless extension candidates. Maximal degree in co-relation 65497. Up to 3481 conditions per place. [2024-11-28 05:13:12,081 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 484 selfloop transitions, 112 changer transitions 2/599 dead transitions. [2024-11-28 05:13:12,081 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 613 places, 599 transitions, 14345 flow [2024-11-28 05:13:12,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-28 05:13:12,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-11-28 05:13:12,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 114 transitions. [2024-11-28 05:13:12,082 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.32386363636363635 [2024-11-28 05:13:12,082 INFO L175 Difference]: Start difference. First operand has 598 places, 573 transitions, 12406 flow. Second operand 16 states and 114 transitions. [2024-11-28 05:13:12,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 613 places, 599 transitions, 14345 flow [2024-11-28 05:13:16,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 597 places, 599 transitions, 13677 flow, removed 144 selfloop flow, removed 16 redundant places. [2024-11-28 05:13:16,645 INFO L231 Difference]: Finished difference. Result has 598 places, 574 transitions, 12049 flow [2024-11-28 05:13:16,645 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=11740, PETRI_DIFFERENCE_MINUEND_PLACES=582, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=573, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=461, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=12049, PETRI_PLACES=598, PETRI_TRANSITIONS=574} [2024-11-28 05:13:16,646 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 576 predicate places. [2024-11-28 05:13:16,646 INFO L471 AbstractCegarLoop]: Abstraction has has 598 places, 574 transitions, 12049 flow [2024-11-28 05:13:16,646 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 4.678571428571429) internal successors, (131), 28 states have internal predecessors, (131), 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) [2024-11-28 05:13:16,646 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:13:16,646 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:13:16,662 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Ended with exit code 0 [2024-11-28 05:13:16,846 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2024-11-28 05:13:16,847 INFO L396 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:13:16,849 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:13:16,849 INFO L85 PathProgramCache]: Analyzing trace with hash -1123553249, now seen corresponding path program 128 times [2024-11-28 05:13:16,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:13:16,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98857293] [2024-11-28 05:13:16,849 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:13:16,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:13:16,897 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:13:16,898 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:13:18,025 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-28 05:13:18,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:13:18,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98857293] [2024-11-28 05:13:18,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98857293] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:13:18,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384764945] [2024-11-28 05:13:18,026 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:13:18,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:13:18,026 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:13:18,028 INFO L229 MonitoredProcess]: Starting monitored process 131 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:13:18,030 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2024-11-28 05:13:18,665 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:13:18,665 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:13:18,668 INFO L256 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-28 05:13:18,669 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:13:18,865 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:13:18,865 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 34 [2024-11-28 05:13:18,938 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:13:18,938 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:13:19,185 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-11-28 05:13:19,185 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 83 [2024-11-28 05:13:19,316 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:13:19,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384764945] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:13:19,317 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:13:19,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 9] total 31 [2024-11-28 05:13:19,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108210251] [2024-11-28 05:13:19,317 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:13:19,317 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-28 05:13:19,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:13:19,317 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-28 05:13:19,318 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=822, Unknown=0, NotChecked=0, Total=930 [2024-11-28 05:13:19,318 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 05:13:19,318 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 598 places, 574 transitions, 12049 flow. Second operand has 31 states, 31 states have (on average 4.709677419354839) internal successors, (146), 31 states have internal predecessors, (146), 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) [2024-11-28 05:13:19,318 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:13:19,318 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 05:13:19,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:13:23,728 INFO L124 PetriNetUnfolderBase]: 2302/4259 cut-off events. [2024-11-28 05:13:23,728 INFO L125 PetriNetUnfolderBase]: For 617909/617909 co-relation queries the response was YES. [2024-11-28 05:13:23,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67287 conditions, 4259 events. 2302/4259 cut-off events. For 617909/617909 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 29466 event pairs, 937 based on Foata normal form. 24/4281 useless extension candidates. Maximal degree in co-relation 67087. Up to 3749 conditions per place. [2024-11-28 05:13:23,867 INFO L140 encePairwiseOnDemand]: 11/22 looper letters, 535 selfloop transitions, 91 changer transitions 9/636 dead transitions. [2024-11-28 05:13:23,867 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 624 places, 636 transitions, 15548 flow [2024-11-28 05:13:23,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-28 05:13:23,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-11-28 05:13:23,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 189 transitions. [2024-11-28 05:13:23,868 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3181818181818182 [2024-11-28 05:13:23,868 INFO L175 Difference]: Start difference. First operand has 598 places, 574 transitions, 12049 flow. Second operand 27 states and 189 transitions. [2024-11-28 05:13:23,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 624 places, 636 transitions, 15548 flow [2024-11-28 05:13:28,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 610 places, 636 transitions, 15285 flow, removed 22 selfloop flow, removed 14 redundant places. [2024-11-28 05:13:28,995 INFO L231 Difference]: Finished difference. Result has 613 places, 582 transitions, 12590 flow [2024-11-28 05:13:28,996 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=11766, PETRI_DIFFERENCE_MINUEND_PLACES=584, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=573, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=486, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=12590, PETRI_PLACES=613, PETRI_TRANSITIONS=582} [2024-11-28 05:13:28,996 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 591 predicate places. [2024-11-28 05:13:28,996 INFO L471 AbstractCegarLoop]: Abstraction has has 613 places, 582 transitions, 12590 flow [2024-11-28 05:13:28,996 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 4.709677419354839) internal successors, (146), 31 states have internal predecessors, (146), 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) [2024-11-28 05:13:28,996 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:13:28,996 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:13:29,006 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Forceful destruction successful, exit code 0 [2024-11-28 05:13:29,197 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 131 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2024-11-28 05:13:29,197 INFO L396 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:13:29,198 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:13:29,198 INFO L85 PathProgramCache]: Analyzing trace with hash -299421073, now seen corresponding path program 129 times [2024-11-28 05:13:29,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:13:29,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957364759] [2024-11-28 05:13:29,198 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 05:13:29,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:13:29,224 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 05:13:29,224 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:13:29,698 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-28 05:13:29,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:13:29,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957364759] [2024-11-28 05:13:29,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957364759] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:13:29,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810803073] [2024-11-28 05:13:29,698 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 05:13:29,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:13:29,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:13:29,700 INFO L229 MonitoredProcess]: Starting monitored process 132 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:13:29,701 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Waiting until timeout for monitored process [2024-11-28 05:13:30,302 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 05:13:30,302 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:13:30,303 INFO L256 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-28 05:13:30,304 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:13:30,488 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:13:30,488 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:13:30,720 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-11-28 05:13:30,720 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2024-11-28 05:13:30,931 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:13:30,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810803073] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:13:30,931 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:13:30,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 10] total 27 [2024-11-28 05:13:30,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701937916] [2024-11-28 05:13:30,931 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:13:30,932 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-28 05:13:30,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:13:30,932 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-28 05:13:30,932 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2024-11-28 05:13:30,932 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 05:13:30,932 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 613 places, 582 transitions, 12590 flow. Second operand has 27 states, 27 states have (on average 4.851851851851852) internal successors, (131), 27 states have internal predecessors, (131), 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) [2024-11-28 05:13:30,932 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:13:30,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 05:13:30,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:13:34,943 INFO L124 PetriNetUnfolderBase]: 2290/4264 cut-off events. [2024-11-28 05:13:34,943 INFO L125 PetriNetUnfolderBase]: For 620113/620113 co-relation queries the response was YES. [2024-11-28 05:13:35,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67487 conditions, 4264 events. 2290/4264 cut-off events. For 620113/620113 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 29865 event pairs, 804 based on Foata normal form. 12/4274 useless extension candidates. Maximal degree in co-relation 67284. Up to 3460 conditions per place. [2024-11-28 05:13:35,078 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 515 selfloop transitions, 117 changer transitions 19/652 dead transitions. [2024-11-28 05:13:35,078 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 636 places, 652 transitions, 15675 flow [2024-11-28 05:13:35,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-28 05:13:35,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-11-28 05:13:35,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 185 transitions. [2024-11-28 05:13:35,079 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.33636363636363636 [2024-11-28 05:13:35,079 INFO L175 Difference]: Start difference. First operand has 613 places, 582 transitions, 12590 flow. Second operand 25 states and 185 transitions. [2024-11-28 05:13:35,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 636 places, 652 transitions, 15675 flow [2024-11-28 05:13:40,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 616 places, 652 transitions, 15160 flow, removed 207 selfloop flow, removed 20 redundant places. [2024-11-28 05:13:40,369 INFO L231 Difference]: Finished difference. Result has 624 places, 589 transitions, 12698 flow [2024-11-28 05:13:40,370 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=12105, PETRI_DIFFERENCE_MINUEND_PLACES=592, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=582, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=469, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=12698, PETRI_PLACES=624, PETRI_TRANSITIONS=589} [2024-11-28 05:13:40,370 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 602 predicate places. [2024-11-28 05:13:40,370 INFO L471 AbstractCegarLoop]: Abstraction has has 624 places, 589 transitions, 12698 flow [2024-11-28 05:13:40,370 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.851851851851852) internal successors, (131), 27 states have internal predecessors, (131), 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) [2024-11-28 05:13:40,370 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:13:40,370 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:13:40,384 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Ended with exit code 0 [2024-11-28 05:13:40,571 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2024-11-28 05:13:40,571 INFO L396 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:13:40,572 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:13:40,572 INFO L85 PathProgramCache]: Analyzing trace with hash 815651139, now seen corresponding path program 130 times [2024-11-28 05:13:40,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:13:40,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454804049] [2024-11-28 05:13:40,572 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 05:13:40,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:13:40,603 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 05:13:40,603 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:13:41,322 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-28 05:13:41,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:13:41,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454804049] [2024-11-28 05:13:41,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454804049] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:13:41,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912956338] [2024-11-28 05:13:41,322 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 05:13:41,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:13:41,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:13:41,324 INFO L229 MonitoredProcess]: Starting monitored process 133 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:13:41,326 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Waiting until timeout for monitored process [2024-11-28 05:13:41,900 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 05:13:41,900 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:13:41,902 INFO L256 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-28 05:13:41,903 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:13:42,075 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:13:42,075 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:13:42,293 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-11-28 05:13:42,294 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 83 [2024-11-28 05:13:42,365 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:13:42,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912956338] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:13:42,365 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:13:42,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 9] total 29 [2024-11-28 05:13:42,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934280751] [2024-11-28 05:13:42,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:13:42,365 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-28 05:13:42,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:13:42,366 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-28 05:13:42,366 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=715, Unknown=0, NotChecked=0, Total=812 [2024-11-28 05:13:42,366 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 05:13:42,366 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 624 places, 589 transitions, 12698 flow. Second operand has 29 states, 29 states have (on average 4.758620689655173) internal successors, (138), 29 states have internal predecessors, (138), 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) [2024-11-28 05:13:42,366 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:13:42,366 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 05:13:42,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:13:45,554 INFO L124 PetriNetUnfolderBase]: 2280/4224 cut-off events. [2024-11-28 05:13:45,555 INFO L125 PetriNetUnfolderBase]: For 605873/605873 co-relation queries the response was YES. [2024-11-28 05:13:45,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66855 conditions, 4224 events. 2280/4224 cut-off events. For 605873/605873 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 29306 event pairs, 837 based on Foata normal form. 4/4226 useless extension candidates. Maximal degree in co-relation 66647. Up to 3578 conditions per place. [2024-11-28 05:13:45,682 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 506 selfloop transitions, 105 changer transitions 0/612 dead transitions. [2024-11-28 05:13:45,682 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 636 places, 612 transitions, 14712 flow [2024-11-28 05:13:45,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-28 05:13:45,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-11-28 05:13:45,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 108 transitions. [2024-11-28 05:13:45,683 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3068181818181818 [2024-11-28 05:13:45,683 INFO L175 Difference]: Start difference. First operand has 624 places, 589 transitions, 12698 flow. Second operand 16 states and 108 transitions. [2024-11-28 05:13:45,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 636 places, 612 transitions, 14712 flow [2024-11-28 05:13:50,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 619 places, 612 transitions, 14183 flow, removed 156 selfloop flow, removed 17 redundant places. [2024-11-28 05:13:50,786 INFO L231 Difference]: Finished difference. Result has 621 places, 591 transitions, 12485 flow [2024-11-28 05:13:50,787 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=12169, PETRI_DIFFERENCE_MINUEND_PLACES=604, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=589, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=484, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=12485, PETRI_PLACES=621, PETRI_TRANSITIONS=591} [2024-11-28 05:13:50,787 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 599 predicate places. [2024-11-28 05:13:50,787 INFO L471 AbstractCegarLoop]: Abstraction has has 621 places, 591 transitions, 12485 flow [2024-11-28 05:13:50,787 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 4.758620689655173) internal successors, (138), 29 states have internal predecessors, (138), 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) [2024-11-28 05:13:50,788 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:13:50,788 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:13:50,797 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Forceful destruction successful, exit code 0 [2024-11-28 05:13:50,988 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2024-11-28 05:13:50,988 INFO L396 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:13:50,989 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:13:50,989 INFO L85 PathProgramCache]: Analyzing trace with hash -116237397, now seen corresponding path program 131 times [2024-11-28 05:13:50,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:13:50,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323508595] [2024-11-28 05:13:50,989 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 05:13:50,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:13:51,027 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-11-28 05:13:51,027 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:13:51,607 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-28 05:13:51,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:13:51,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323508595] [2024-11-28 05:13:51,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323508595] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:13:51,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704639326] [2024-11-28 05:13:51,607 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 05:13:51,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:13:51,607 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:13:51,609 INFO L229 MonitoredProcess]: Starting monitored process 134 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:13:51,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Waiting until timeout for monitored process [2024-11-28 05:13:52,537 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-11-28 05:13:52,537 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:13:52,540 INFO L256 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 57 conjuncts are in the unsatisfiable core [2024-11-28 05:13:52,542 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:13:52,645 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 19 treesize of output 1 [2024-11-28 05:13:52,675 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 19 treesize of output 1 [2024-11-28 05:13:52,957 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:13:52,957 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 41 [2024-11-28 05:13:53,025 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 32 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 05:13:53,025 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:13:53,388 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:13:53,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704639326] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:13:53,388 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:13:53,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 18, 9] total 35 [2024-11-28 05:13:53,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145984574] [2024-11-28 05:13:53,388 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:13:53,388 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-11-28 05:13:53,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:13:53,389 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-11-28 05:13:53,389 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1044, Unknown=0, NotChecked=0, Total=1190 [2024-11-28 05:13:53,389 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 05:13:53,389 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 621 places, 591 transitions, 12485 flow. Second operand has 35 states, 35 states have (on average 4.685714285714286) internal successors, (164), 35 states have internal predecessors, (164), 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) [2024-11-28 05:13:53,389 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:13:53,389 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 05:13:53,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:13:56,776 INFO L124 PetriNetUnfolderBase]: 2300/4277 cut-off events. [2024-11-28 05:13:56,776 INFO L125 PetriNetUnfolderBase]: For 619463/619463 co-relation queries the response was YES. [2024-11-28 05:13:56,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67592 conditions, 4277 events. 2300/4277 cut-off events. For 619463/619463 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 29793 event pairs, 974 based on Foata normal form. 12/4287 useless extension candidates. Maximal degree in co-relation 67384. Up to 3901 conditions per place. [2024-11-28 05:13:56,862 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 561 selfloop transitions, 69 changer transitions 4/635 dead transitions. [2024-11-28 05:13:56,862 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 639 places, 635 transitions, 15089 flow [2024-11-28 05:13:56,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-28 05:13:56,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-11-28 05:13:56,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 146 transitions. [2024-11-28 05:13:56,863 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3492822966507177 [2024-11-28 05:13:56,863 INFO L175 Difference]: Start difference. First operand has 621 places, 591 transitions, 12485 flow. Second operand 19 states and 146 transitions. [2024-11-28 05:13:56,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 639 places, 635 transitions, 15089 flow [2024-11-28 05:14:01,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 624 places, 635 transitions, 14763 flow, removed 55 selfloop flow, removed 15 redundant places. [2024-11-28 05:14:01,223 INFO L231 Difference]: Finished difference. Result has 627 places, 595 transitions, 12547 flow [2024-11-28 05:14:01,224 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=12169, PETRI_DIFFERENCE_MINUEND_PLACES=606, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=591, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=523, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=12547, PETRI_PLACES=627, PETRI_TRANSITIONS=595} [2024-11-28 05:14:01,224 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 605 predicate places. [2024-11-28 05:14:01,224 INFO L471 AbstractCegarLoop]: Abstraction has has 627 places, 595 transitions, 12547 flow [2024-11-28 05:14:01,225 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 4.685714285714286) internal successors, (164), 35 states have internal predecessors, (164), 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) [2024-11-28 05:14:01,225 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:14:01,225 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:14:01,242 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Ended with exit code 0 [2024-11-28 05:14:01,425 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139,134 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:14:01,425 INFO L396 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:14:01,426 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:14:01,426 INFO L85 PathProgramCache]: Analyzing trace with hash -129634207, now seen corresponding path program 132 times [2024-11-28 05:14:01,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:14:01,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425996324] [2024-11-28 05:14:01,427 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 05:14:01,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:14:01,492 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-11-28 05:14:01,493 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:14:02,153 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-28 05:14:02,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:14:02,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425996324] [2024-11-28 05:14:02,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425996324] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:14:02,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700370346] [2024-11-28 05:14:02,153 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 05:14:02,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:14:02,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:14:02,155 INFO L229 MonitoredProcess]: Starting monitored process 135 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:14:02,156 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Waiting until timeout for monitored process [2024-11-28 05:14:02,795 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-11-28 05:14:02,795 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:14:02,797 INFO L256 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-11-28 05:14:02,799 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:14:03,207 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:14:03,207 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 30 [2024-11-28 05:14:03,301 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-28 05:14:03,301 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:14:03,525 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-11-28 05:14:03,525 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 73 treesize of output 94 [2024-11-28 05:14:03,649 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:14:03,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700370346] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:14:03,649 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:14:03,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 28 [2024-11-28 05:14:03,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962990470] [2024-11-28 05:14:03,650 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:14:03,650 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-28 05:14:03,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:14:03,650 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-28 05:14:03,650 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2024-11-28 05:14:03,650 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 05:14:03,650 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 627 places, 595 transitions, 12547 flow. Second operand has 28 states, 28 states have (on average 4.892857142857143) internal successors, (137), 28 states have internal predecessors, (137), 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) [2024-11-28 05:14:03,650 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:14:03,651 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 05:14:03,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:14:06,866 INFO L124 PetriNetUnfolderBase]: 2320/4323 cut-off events. [2024-11-28 05:14:06,866 INFO L125 PetriNetUnfolderBase]: For 635295/635295 co-relation queries the response was YES. [2024-11-28 05:14:06,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68474 conditions, 4323 events. 2320/4323 cut-off events. For 635295/635295 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 30231 event pairs, 953 based on Foata normal form. 8/4329 useless extension candidates. Maximal degree in co-relation 68264. Up to 3839 conditions per place. [2024-11-28 05:14:07,002 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 576 selfloop transitions, 76 changer transitions 6/659 dead transitions. [2024-11-28 05:14:07,002 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 649 places, 659 transitions, 15525 flow [2024-11-28 05:14:07,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-28 05:14:07,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-11-28 05:14:07,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 181 transitions. [2024-11-28 05:14:07,003 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3577075098814229 [2024-11-28 05:14:07,003 INFO L175 Difference]: Start difference. First operand has 627 places, 595 transitions, 12547 flow. Second operand 23 states and 181 transitions. [2024-11-28 05:14:07,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 649 places, 659 transitions, 15525 flow [2024-11-28 05:14:11,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 634 places, 659 transitions, 15261 flow, removed 67 selfloop flow, removed 15 redundant places. [2024-11-28 05:14:11,223 INFO L231 Difference]: Finished difference. Result has 637 places, 601 transitions, 12752 flow [2024-11-28 05:14:11,223 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=12288, PETRI_DIFFERENCE_MINUEND_PLACES=612, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=595, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=522, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=12752, PETRI_PLACES=637, PETRI_TRANSITIONS=601} [2024-11-28 05:14:11,223 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 615 predicate places. [2024-11-28 05:14:11,223 INFO L471 AbstractCegarLoop]: Abstraction has has 637 places, 601 transitions, 12752 flow [2024-11-28 05:14:11,224 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 4.892857142857143) internal successors, (137), 28 states have internal predecessors, (137), 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) [2024-11-28 05:14:11,224 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:14:11,224 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:14:11,231 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Forceful destruction successful, exit code 0 [2024-11-28 05:14:11,424 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,135 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:14:11,424 INFO L396 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:14:11,425 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:14:11,425 INFO L85 PathProgramCache]: Analyzing trace with hash 871376263, now seen corresponding path program 133 times [2024-11-28 05:14:11,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:14:11,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732740487] [2024-11-28 05:14:11,425 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 05:14:11,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:14:11,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:14:12,152 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 2 proven. 29 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-28 05:14:12,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:14:12,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732740487] [2024-11-28 05:14:12,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732740487] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:14:12,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672886330] [2024-11-28 05:14:12,152 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 05:14:12,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:14:12,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:14:12,154 INFO L229 MonitoredProcess]: Starting monitored process 136 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:14:12,156 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Waiting until timeout for monitored process [2024-11-28 05:14:12,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:14:12,733 INFO L256 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-28 05:14:12,734 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:14:12,887 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:14:12,887 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:14:13,077 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-11-28 05:14:13,077 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2024-11-28 05:14:13,183 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:14:13,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672886330] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:14:13,183 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:14:13,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 9] total 30 [2024-11-28 05:14:13,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955868502] [2024-11-28 05:14:13,184 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:14:13,184 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-28 05:14:13,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:14:13,184 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-28 05:14:13,184 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=760, Unknown=0, NotChecked=0, Total=870 [2024-11-28 05:14:13,184 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 05:14:13,185 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 637 places, 601 transitions, 12752 flow. Second operand has 30 states, 30 states have (on average 4.666666666666667) internal successors, (140), 30 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:14:13,185 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:14:13,185 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 05:14:13,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:14:16,125 INFO L124 PetriNetUnfolderBase]: 2332/4343 cut-off events. [2024-11-28 05:14:16,125 INFO L125 PetriNetUnfolderBase]: For 648423/648423 co-relation queries the response was YES. [2024-11-28 05:14:16,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69165 conditions, 4343 events. 2332/4343 cut-off events. For 648423/648423 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 30415 event pairs, 987 based on Foata normal form. 8/4349 useless extension candidates. Maximal degree in co-relation 68952. Up to 3977 conditions per place. [2024-11-28 05:14:16,259 INFO L140 encePairwiseOnDemand]: 11/22 looper letters, 557 selfloop transitions, 83 changer transitions 3/644 dead transitions. [2024-11-28 05:14:16,259 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 660 places, 644 transitions, 15353 flow [2024-11-28 05:14:16,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-28 05:14:16,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-11-28 05:14:16,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 170 transitions. [2024-11-28 05:14:16,260 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.32196969696969696 [2024-11-28 05:14:16,260 INFO L175 Difference]: Start difference. First operand has 637 places, 601 transitions, 12752 flow. Second operand 24 states and 170 transitions. [2024-11-28 05:14:16,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 660 places, 644 transitions, 15353 flow [2024-11-28 05:14:21,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 641 places, 644 transitions, 14996 flow, removed 95 selfloop flow, removed 19 redundant places. [2024-11-28 05:14:21,122 INFO L231 Difference]: Finished difference. Result has 643 places, 603 transitions, 12724 flow [2024-11-28 05:14:21,123 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=12395, PETRI_DIFFERENCE_MINUEND_PLACES=618, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=601, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=518, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=12724, PETRI_PLACES=643, PETRI_TRANSITIONS=603} [2024-11-28 05:14:21,123 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 621 predicate places. [2024-11-28 05:14:21,123 INFO L471 AbstractCegarLoop]: Abstraction has has 643 places, 603 transitions, 12724 flow [2024-11-28 05:14:21,123 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 4.666666666666667) internal successors, (140), 30 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:14:21,123 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:14:21,123 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:14:21,136 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Ended with exit code 0 [2024-11-28 05:14:21,324 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,136 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:14:21,324 INFO L396 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:14:21,325 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:14:21,325 INFO L85 PathProgramCache]: Analyzing trace with hash -1842123425, now seen corresponding path program 134 times [2024-11-28 05:14:21,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:14:21,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520749643] [2024-11-28 05:14:21,325 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:14:21,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:14:21,361 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:14:21,361 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:14:22,094 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-28 05:14:22,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:14:22,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520749643] [2024-11-28 05:14:22,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520749643] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:14:22,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701122940] [2024-11-28 05:14:22,095 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:14:22,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:14:22,095 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:14:22,096 INFO L229 MonitoredProcess]: Starting monitored process 137 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:14:22,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Waiting until timeout for monitored process [2024-11-28 05:14:22,682 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:14:22,683 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:14:22,684 INFO L256 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-28 05:14:22,685 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:14:22,845 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:14:22,845 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 34 [2024-11-28 05:14:22,944 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:14:22,944 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:14:23,164 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-11-28 05:14:23,164 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2024-11-28 05:14:23,358 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:14:23,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701122940] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:14:23,359 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:14:23,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 10] total 32 [2024-11-28 05:14:23,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096321247] [2024-11-28 05:14:23,359 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:14:23,359 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-28 05:14:23,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:14:23,359 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-28 05:14:23,360 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=876, Unknown=0, NotChecked=0, Total=992 [2024-11-28 05:14:23,360 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 05:14:23,360 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 643 places, 603 transitions, 12724 flow. Second operand has 32 states, 32 states have (on average 4.625) internal successors, (148), 32 states have internal predecessors, (148), 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) [2024-11-28 05:14:23,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:14:23,360 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 05:14:23,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:14:26,688 INFO L124 PetriNetUnfolderBase]: 2363/4405 cut-off events. [2024-11-28 05:14:26,688 INFO L125 PetriNetUnfolderBase]: For 689185/689185 co-relation queries the response was YES. [2024-11-28 05:14:26,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71058 conditions, 4405 events. 2363/4405 cut-off events. For 689185/689185 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 31023 event pairs, 1008 based on Foata normal form. 27/4430 useless extension candidates. Maximal degree in co-relation 70844. Up to 4021 conditions per place. [2024-11-28 05:14:26,999 INFO L140 encePairwiseOnDemand]: 11/22 looper letters, 560 selfloop transitions, 88 changer transitions 9/658 dead transitions. [2024-11-28 05:14:26,999 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 670 places, 658 transitions, 15657 flow [2024-11-28 05:14:26,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-28 05:14:26,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-11-28 05:14:27,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 198 transitions. [2024-11-28 05:14:27,000 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.32142857142857145 [2024-11-28 05:14:27,000 INFO L175 Difference]: Start difference. First operand has 643 places, 603 transitions, 12724 flow. Second operand 28 states and 198 transitions. [2024-11-28 05:14:27,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 670 places, 658 transitions, 15657 flow [2024-11-28 05:14:31,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 649 places, 658 transitions, 15412 flow, removed 41 selfloop flow, removed 21 redundant places. [2024-11-28 05:14:31,630 INFO L231 Difference]: Finished difference. Result has 655 places, 605 transitions, 13058 flow [2024-11-28 05:14:31,630 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=12456, PETRI_DIFFERENCE_MINUEND_PLACES=622, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=601, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=514, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=13058, PETRI_PLACES=655, PETRI_TRANSITIONS=605} [2024-11-28 05:14:31,630 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 633 predicate places. [2024-11-28 05:14:31,630 INFO L471 AbstractCegarLoop]: Abstraction has has 655 places, 605 transitions, 13058 flow [2024-11-28 05:14:31,631 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 4.625) internal successors, (148), 32 states have internal predecessors, (148), 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) [2024-11-28 05:14:31,631 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:14:31,631 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:14:31,640 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Ended with exit code 0 [2024-11-28 05:14:31,831 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,137 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:14:31,831 INFO L396 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:14:31,832 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:14:31,832 INFO L85 PathProgramCache]: Analyzing trace with hash -1928444863, now seen corresponding path program 135 times [2024-11-28 05:14:31,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:14:31,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416081193] [2024-11-28 05:14:31,832 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 05:14:31,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:14:31,862 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-28 05:14:31,862 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:14:32,305 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-28 05:14:32,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:14:32,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416081193] [2024-11-28 05:14:32,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416081193] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:14:32,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398574688] [2024-11-28 05:14:32,305 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 05:14:32,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:14:32,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:14:32,307 INFO L229 MonitoredProcess]: Starting monitored process 138 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:14:32,309 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Waiting until timeout for monitored process [2024-11-28 05:14:32,893 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-28 05:14:32,893 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:14:32,895 INFO L256 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-11-28 05:14:32,896 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:14:33,172 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-11-28 05:14:33,172 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2024-11-28 05:14:33,190 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-28 05:14:33,190 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:14:33,385 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-11-28 05:14:33,385 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 83 [2024-11-28 05:14:33,484 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:14:33,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398574688] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:14:33,484 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:14:33,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 26 [2024-11-28 05:14:33,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203358639] [2024-11-28 05:14:33,484 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:14:33,485 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-28 05:14:33,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:14:33,485 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-28 05:14:33,485 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=556, Unknown=0, NotChecked=0, Total=650 [2024-11-28 05:14:33,485 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 05:14:33,485 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 655 places, 605 transitions, 13058 flow. Second operand has 26 states, 26 states have (on average 4.884615384615385) internal successors, (127), 26 states have internal predecessors, (127), 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) [2024-11-28 05:14:33,485 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:14:33,485 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 05:14:33,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:14:36,202 INFO L124 PetriNetUnfolderBase]: 2372/4413 cut-off events. [2024-11-28 05:14:36,202 INFO L125 PetriNetUnfolderBase]: For 695476/695476 co-relation queries the response was YES. [2024-11-28 05:14:36,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71919 conditions, 4413 events. 2372/4413 cut-off events. For 695476/695476 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 31052 event pairs, 869 based on Foata normal form. 4/4415 useless extension candidates. Maximal degree in co-relation 71699. Up to 3725 conditions per place. [2024-11-28 05:14:36,372 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 534 selfloop transitions, 103 changer transitions 0/638 dead transitions. [2024-11-28 05:14:36,372 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 668 places, 638 transitions, 15433 flow [2024-11-28 05:14:36,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-28 05:14:36,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-28 05:14:36,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 123 transitions. [2024-11-28 05:14:36,373 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.32887700534759357 [2024-11-28 05:14:36,373 INFO L175 Difference]: Start difference. First operand has 655 places, 605 transitions, 13058 flow. Second operand 17 states and 123 transitions. [2024-11-28 05:14:36,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 668 places, 638 transitions, 15433 flow [2024-11-28 05:14:41,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 649 places, 638 transitions, 15081 flow, removed 123 selfloop flow, removed 19 redundant places. [2024-11-28 05:14:41,258 INFO L231 Difference]: Finished difference. Result has 651 places, 608 transitions, 13054 flow [2024-11-28 05:14:41,258 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=12706, PETRI_DIFFERENCE_MINUEND_PLACES=633, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=605, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=502, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=13054, PETRI_PLACES=651, PETRI_TRANSITIONS=608} [2024-11-28 05:14:41,258 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 629 predicate places. [2024-11-28 05:14:41,258 INFO L471 AbstractCegarLoop]: Abstraction has has 651 places, 608 transitions, 13054 flow [2024-11-28 05:14:41,258 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.884615384615385) internal successors, (127), 26 states have internal predecessors, (127), 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) [2024-11-28 05:14:41,258 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:14:41,259 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:14:41,269 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Ended with exit code 0 [2024-11-28 05:14:41,459 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable143 [2024-11-28 05:14:41,459 INFO L396 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:14:41,459 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:14:41,460 INFO L85 PathProgramCache]: Analyzing trace with hash 2135982599, now seen corresponding path program 136 times [2024-11-28 05:14:41,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:14:41,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274827171] [2024-11-28 05:14:41,460 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 05:14:41,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:14:41,487 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 05:14:41,487 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:14:42,199 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-28 05:14:42,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:14:42,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274827171] [2024-11-28 05:14:42,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274827171] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:14:42,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575640523] [2024-11-28 05:14:42,199 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 05:14:42,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:14:42,199 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:14:42,201 INFO L229 MonitoredProcess]: Starting monitored process 139 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:14:42,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Waiting until timeout for monitored process [2024-11-28 05:14:42,790 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 05:14:42,790 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:14:42,792 INFO L256 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-28 05:14:42,793 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:14:42,919 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:14:42,919 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 34 [2024-11-28 05:14:42,970 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:14:42,970 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:14:43,141 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-11-28 05:14:43,141 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2024-11-28 05:14:43,228 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:14:43,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575640523] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:14:43,228 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:14:43,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 9] total 29 [2024-11-28 05:14:43,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643191072] [2024-11-28 05:14:43,228 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:14:43,228 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-28 05:14:43,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:14:43,229 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-28 05:14:43,229 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=708, Unknown=0, NotChecked=0, Total=812 [2024-11-28 05:14:43,229 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 05:14:43,229 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 651 places, 608 transitions, 13054 flow. Second operand has 29 states, 29 states have (on average 4.689655172413793) internal successors, (136), 29 states have internal predecessors, (136), 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) [2024-11-28 05:14:43,229 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:14:43,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 05:14:43,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:14:46,516 INFO L124 PetriNetUnfolderBase]: 2406/4489 cut-off events. [2024-11-28 05:14:46,516 INFO L125 PetriNetUnfolderBase]: For 712844/712844 co-relation queries the response was YES. [2024-11-28 05:14:46,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73733 conditions, 4489 events. 2406/4489 cut-off events. For 712844/712844 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 31704 event pairs, 981 based on Foata normal form. 8/4495 useless extension candidates. Maximal degree in co-relation 73512. Up to 3977 conditions per place. [2024-11-28 05:14:46,655 INFO L140 encePairwiseOnDemand]: 11/22 looper letters, 562 selfloop transitions, 107 changer transitions 6/676 dead transitions. [2024-11-28 05:14:46,655 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 678 places, 676 transitions, 16613 flow [2024-11-28 05:14:46,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-28 05:14:46,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-11-28 05:14:46,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 205 transitions. [2024-11-28 05:14:46,655 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3327922077922078 [2024-11-28 05:14:46,656 INFO L175 Difference]: Start difference. First operand has 651 places, 608 transitions, 13054 flow. Second operand 28 states and 205 transitions. [2024-11-28 05:14:46,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 678 places, 676 transitions, 16613 flow [2024-11-28 05:14:51,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 662 places, 676 transitions, 16336 flow, removed 27 selfloop flow, removed 16 redundant places. [2024-11-28 05:14:51,766 INFO L231 Difference]: Finished difference. Result has 666 places, 617 transitions, 13563 flow [2024-11-28 05:14:51,766 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=12777, PETRI_DIFFERENCE_MINUEND_PLACES=635, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=608, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=505, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=13563, PETRI_PLACES=666, PETRI_TRANSITIONS=617} [2024-11-28 05:14:51,766 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 644 predicate places. [2024-11-28 05:14:51,766 INFO L471 AbstractCegarLoop]: Abstraction has has 666 places, 617 transitions, 13563 flow [2024-11-28 05:14:51,766 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 4.689655172413793) internal successors, (136), 29 states have internal predecessors, (136), 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) [2024-11-28 05:14:51,766 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:14:51,767 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:14:51,777 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Forceful destruction successful, exit code 0 [2024-11-28 05:14:51,967 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2024-11-28 05:14:51,967 INFO L396 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:14:51,968 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:14:51,968 INFO L85 PathProgramCache]: Analyzing trace with hash 576954757, now seen corresponding path program 137 times [2024-11-28 05:14:51,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:14:51,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380071417] [2024-11-28 05:14:51,968 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 05:14:51,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:14:52,009 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-11-28 05:14:52,009 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:14:52,536 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-28 05:14:52,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:14:52,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380071417] [2024-11-28 05:14:52,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380071417] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:14:52,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560375057] [2024-11-28 05:14:52,536 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 05:14:52,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:14:52,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:14:52,538 INFO L229 MonitoredProcess]: Starting monitored process 140 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:14:52,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Waiting until timeout for monitored process [2024-11-28 05:14:53,212 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-11-28 05:14:53,212 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:14:53,214 INFO L256 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-11-28 05:14:53,216 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:14:53,494 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:14:53,494 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 41 [2024-11-28 05:14:53,563 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-28 05:14:53,563 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:14:53,840 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-11-28 05:14:53,840 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 83 [2024-11-28 05:14:53,935 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:14:53,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560375057] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:14:53,935 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:14:53,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 10] total 31 [2024-11-28 05:14:53,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480236756] [2024-11-28 05:14:53,936 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:14:53,936 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-28 05:14:53,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:14:53,936 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-28 05:14:53,936 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=825, Unknown=0, NotChecked=0, Total=930 [2024-11-28 05:14:53,936 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 05:14:53,937 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 666 places, 617 transitions, 13563 flow. Second operand has 31 states, 31 states have (on average 4.838709677419355) internal successors, (150), 31 states have internal predecessors, (150), 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) [2024-11-28 05:14:53,937 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:14:53,937 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 05:14:53,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:14:58,113 INFO L124 PetriNetUnfolderBase]: 2450/4591 cut-off events. [2024-11-28 05:14:58,113 INFO L125 PetriNetUnfolderBase]: For 758034/758034 co-relation queries the response was YES. [2024-11-28 05:14:58,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76824 conditions, 4591 events. 2450/4591 cut-off events. For 758034/758034 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 32813 event pairs, 877 based on Foata normal form. 12/4601 useless extension candidates. Maximal degree in co-relation 76601. Up to 3746 conditions per place. [2024-11-28 05:14:58,228 INFO L140 encePairwiseOnDemand]: 11/22 looper letters, 555 selfloop transitions, 132 changer transitions 3/691 dead transitions. [2024-11-28 05:14:58,228 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 693 places, 691 transitions, 17653 flow [2024-11-28 05:14:58,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-28 05:14:58,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-11-28 05:14:58,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 203 transitions. [2024-11-28 05:14:58,229 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.32954545454545453 [2024-11-28 05:14:58,229 INFO L175 Difference]: Start difference. First operand has 666 places, 617 transitions, 13563 flow. Second operand 28 states and 203 transitions. [2024-11-28 05:14:58,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 693 places, 691 transitions, 17653 flow [2024-11-28 05:15:03,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 673 places, 691 transitions, 17177 flow, removed 152 selfloop flow, removed 20 redundant places. [2024-11-28 05:15:03,418 INFO L231 Difference]: Finished difference. Result has 680 places, 633 transitions, 14522 flow [2024-11-28 05:15:03,419 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=13087, PETRI_DIFFERENCE_MINUEND_PLACES=646, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=617, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=494, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=14522, PETRI_PLACES=680, PETRI_TRANSITIONS=633} [2024-11-28 05:15:03,419 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 658 predicate places. [2024-11-28 05:15:03,419 INFO L471 AbstractCegarLoop]: Abstraction has has 680 places, 633 transitions, 14522 flow [2024-11-28 05:15:03,419 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 4.838709677419355) internal successors, (150), 31 states have internal predecessors, (150), 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) [2024-11-28 05:15:03,419 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:15:03,419 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:15:03,433 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Ended with exit code 0 [2024-11-28 05:15:03,620 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2024-11-28 05:15:03,620 INFO L396 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:15:03,621 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:15:03,621 INFO L85 PathProgramCache]: Analyzing trace with hash 709944222, now seen corresponding path program 138 times [2024-11-28 05:15:03,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:15:03,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014864118] [2024-11-28 05:15:03,621 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 05:15:03,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:15:03,655 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-11-28 05:15:03,655 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:15:04,095 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-28 05:15:04,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:15:04,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014864118] [2024-11-28 05:15:04,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014864118] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:15:04,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109952212] [2024-11-28 05:15:04,095 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 05:15:04,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:15:04,095 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:15:04,097 INFO L229 MonitoredProcess]: Starting monitored process 141 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:15:04,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Waiting until timeout for monitored process [2024-11-28 05:15:04,708 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-11-28 05:15:04,709 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:15:04,711 INFO L256 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-11-28 05:15:04,712 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:15:05,023 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-11-28 05:15:05,023 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2024-11-28 05:15:05,057 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-28 05:15:05,057 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:15:05,209 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-11-28 05:15:05,209 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2024-11-28 05:15:05,339 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:15:05,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109952212] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:15:05,339 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:15:05,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 28 [2024-11-28 05:15:05,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582402757] [2024-11-28 05:15:05,340 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:15:05,340 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-28 05:15:05,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:15:05,340 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-28 05:15:05,340 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=648, Unknown=0, NotChecked=0, Total=756 [2024-11-28 05:15:05,340 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 05:15:05,341 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 680 places, 633 transitions, 14522 flow. Second operand has 28 states, 28 states have (on average 4.964285714285714) internal successors, (139), 28 states have internal predecessors, (139), 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) [2024-11-28 05:15:05,341 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:15:05,341 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 05:15:05,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:15:08,050 INFO L124 PetriNetUnfolderBase]: 2486/4659 cut-off events. [2024-11-28 05:15:08,050 INFO L125 PetriNetUnfolderBase]: For 842759/842759 co-relation queries the response was YES. [2024-11-28 05:15:08,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80224 conditions, 4659 events. 2486/4659 cut-off events. For 842759/842759 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 33386 event pairs, 1070 based on Foata normal form. 15/4672 useless extension candidates. Maximal degree in co-relation 79994. Up to 4232 conditions per place. [2024-11-28 05:15:08,166 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 624 selfloop transitions, 60 changer transitions 0/685 dead transitions. [2024-11-28 05:15:08,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 697 places, 685 transitions, 17439 flow [2024-11-28 05:15:08,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-28 05:15:08,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-11-28 05:15:08,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 139 transitions. [2024-11-28 05:15:08,167 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.351010101010101 [2024-11-28 05:15:08,167 INFO L175 Difference]: Start difference. First operand has 680 places, 633 transitions, 14522 flow. Second operand 18 states and 139 transitions. [2024-11-28 05:15:08,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 697 places, 685 transitions, 17439 flow [2024-11-28 05:15:14,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 681 places, 685 transitions, 16389 flow, removed 444 selfloop flow, removed 16 redundant places. [2024-11-28 05:15:14,155 INFO L231 Difference]: Finished difference. Result has 683 places, 636 transitions, 13873 flow [2024-11-28 05:15:14,156 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=13472, PETRI_DIFFERENCE_MINUEND_PLACES=664, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=633, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=574, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=13873, PETRI_PLACES=683, PETRI_TRANSITIONS=636} [2024-11-28 05:15:14,156 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 661 predicate places. [2024-11-28 05:15:14,156 INFO L471 AbstractCegarLoop]: Abstraction has has 683 places, 636 transitions, 13873 flow [2024-11-28 05:15:14,156 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 4.964285714285714) internal successors, (139), 28 states have internal predecessors, (139), 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) [2024-11-28 05:15:14,156 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:15:14,156 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:15:14,165 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Forceful destruction successful, exit code 0 [2024-11-28 05:15:14,356 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2024-11-28 05:15:14,357 INFO L396 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:15:14,358 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:15:14,358 INFO L85 PathProgramCache]: Analyzing trace with hash -1510801406, now seen corresponding path program 139 times [2024-11-28 05:15:14,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:15:14,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6153187] [2024-11-28 05:15:14,358 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 05:15:14,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:15:14,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:15:15,024 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-28 05:15:15,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:15:15,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6153187] [2024-11-28 05:15:15,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6153187] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:15:15,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033872222] [2024-11-28 05:15:15,024 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 05:15:15,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:15:15,024 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:15:15,026 INFO L229 MonitoredProcess]: Starting monitored process 142 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:15:15,027 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Waiting until timeout for monitored process [2024-11-28 05:15:15,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:15:15,624 INFO L256 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-28 05:15:15,625 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:15:15,760 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-11-28 05:15:15,760 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 9 [2024-11-28 05:15:15,765 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:15:15,765 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:15:15,927 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-11-28 05:15:15,927 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2024-11-28 05:15:16,014 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:15:16,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033872222] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:15:16,014 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:15:16,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 9] total 29 [2024-11-28 05:15:16,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291861377] [2024-11-28 05:15:16,014 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:15:16,014 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-28 05:15:16,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:15:16,015 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-28 05:15:16,015 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=706, Unknown=0, NotChecked=0, Total=812 [2024-11-28 05:15:16,015 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 05:15:16,015 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 683 places, 636 transitions, 13873 flow. Second operand has 29 states, 29 states have (on average 4.827586206896552) internal successors, (140), 29 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:15:16,015 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:15:16,015 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 05:15:16,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:15:19,234 INFO L124 PetriNetUnfolderBase]: 2521/4722 cut-off events. [2024-11-28 05:15:19,234 INFO L125 PetriNetUnfolderBase]: For 884522/884522 co-relation queries the response was YES. [2024-11-28 05:15:19,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81574 conditions, 4722 events. 2521/4722 cut-off events. For 884522/884522 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 33804 event pairs, 1057 based on Foata normal form. 15/4735 useless extension candidates. Maximal degree in co-relation 81342. Up to 4228 conditions per place. [2024-11-28 05:15:19,369 INFO L140 encePairwiseOnDemand]: 11/22 looper letters, 616 selfloop transitions, 84 changer transitions 6/707 dead transitions. [2024-11-28 05:15:19,369 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 707 places, 707 transitions, 17431 flow [2024-11-28 05:15:19,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-28 05:15:19,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-11-28 05:15:19,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 193 transitions. [2024-11-28 05:15:19,370 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3509090909090909 [2024-11-28 05:15:19,370 INFO L175 Difference]: Start difference. First operand has 683 places, 636 transitions, 13873 flow. Second operand 25 states and 193 transitions. [2024-11-28 05:15:19,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 707 places, 707 transitions, 17431 flow [2024-11-28 05:15:25,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 695 places, 707 transitions, 17221 flow, removed 83 selfloop flow, removed 12 redundant places. [2024-11-28 05:15:25,781 INFO L231 Difference]: Finished difference. Result has 697 places, 640 transitions, 14225 flow [2024-11-28 05:15:25,781 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=13663, PETRI_DIFFERENCE_MINUEND_PLACES=671, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=636, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=554, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=14225, PETRI_PLACES=697, PETRI_TRANSITIONS=640} [2024-11-28 05:15:25,781 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 675 predicate places. [2024-11-28 05:15:25,781 INFO L471 AbstractCegarLoop]: Abstraction has has 697 places, 640 transitions, 14225 flow [2024-11-28 05:15:25,782 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 4.827586206896552) internal successors, (140), 29 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:15:25,782 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:15:25,782 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:15:25,789 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Ended with exit code 0 [2024-11-28 05:15:25,982 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2024-11-28 05:15:25,982 INFO L396 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:15:25,983 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:15:25,983 INFO L85 PathProgramCache]: Analyzing trace with hash 1828666855, now seen corresponding path program 140 times [2024-11-28 05:15:25,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:15:25,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364289796] [2024-11-28 05:15:25,983 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:15:25,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:15:26,009 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:15:26,009 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:15:26,863 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-28 05:15:26,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:15:26,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364289796] [2024-11-28 05:15:26,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364289796] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:15:26,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464642826] [2024-11-28 05:15:26,863 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:15:26,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:15:26,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:15:26,865 INFO L229 MonitoredProcess]: Starting monitored process 143 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:15:26,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Waiting until timeout for monitored process [2024-11-28 05:15:27,483 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:15:27,483 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:15:27,485 INFO L256 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-28 05:15:27,486 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:15:27,658 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-11-28 05:15:27,658 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 9 [2024-11-28 05:15:27,682 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:15:27,682 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:15:27,854 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-11-28 05:15:27,854 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2024-11-28 05:15:28,018 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:15:28,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464642826] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:15:28,018 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:15:28,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 9] total 31 [2024-11-28 05:15:28,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873166133] [2024-11-28 05:15:28,019 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:15:28,019 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-28 05:15:28,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:15:28,019 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-28 05:15:28,019 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=828, Unknown=0, NotChecked=0, Total=930 [2024-11-28 05:15:28,019 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 05:15:28,019 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 697 places, 640 transitions, 14225 flow. Second operand has 31 states, 31 states have (on average 4.709677419354839) internal successors, (146), 31 states have internal predecessors, (146), 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) [2024-11-28 05:15:28,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:15:28,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 05:15:28,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:15:31,524 INFO L124 PetriNetUnfolderBase]: 2541/4757 cut-off events. [2024-11-28 05:15:31,524 INFO L125 PetriNetUnfolderBase]: For 923907/923907 co-relation queries the response was YES. [2024-11-28 05:15:31,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83714 conditions, 4757 events. 2541/4757 cut-off events. For 923907/923907 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 34331 event pairs, 904 based on Foata normal form. 18/4773 useless extension candidates. Maximal degree in co-relation 83480. Up to 3866 conditions per place. [2024-11-28 05:15:31,641 INFO L140 encePairwiseOnDemand]: 11/22 looper letters, 550 selfloop transitions, 150 changer transitions 1/702 dead transitions. [2024-11-28 05:15:31,641 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 724 places, 702 transitions, 18091 flow [2024-11-28 05:15:31,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-28 05:15:31,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-11-28 05:15:31,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 201 transitions. [2024-11-28 05:15:31,642 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3262987012987013 [2024-11-28 05:15:31,642 INFO L175 Difference]: Start difference. First operand has 697 places, 640 transitions, 14225 flow. Second operand 28 states and 201 transitions. [2024-11-28 05:15:31,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 724 places, 702 transitions, 18091 flow [2024-11-28 05:15:38,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 704 places, 702 transitions, 17760 flow, removed 111 selfloop flow, removed 20 redundant places. [2024-11-28 05:15:38,055 INFO L231 Difference]: Finished difference. Result has 708 places, 645 transitions, 14694 flow [2024-11-28 05:15:38,055 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=13862, PETRI_DIFFERENCE_MINUEND_PLACES=677, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=639, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=490, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=14694, PETRI_PLACES=708, PETRI_TRANSITIONS=645} [2024-11-28 05:15:38,056 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 686 predicate places. [2024-11-28 05:15:38,056 INFO L471 AbstractCegarLoop]: Abstraction has has 708 places, 645 transitions, 14694 flow [2024-11-28 05:15:38,056 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 4.709677419354839) internal successors, (146), 31 states have internal predecessors, (146), 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) [2024-11-28 05:15:38,056 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:15:38,056 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:15:38,068 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Ended with exit code 0 [2024-11-28 05:15:38,256 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148,143 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:15:38,256 INFO L396 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:15:38,258 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:15:38,258 INFO L85 PathProgramCache]: Analyzing trace with hash -1264104190, now seen corresponding path program 141 times [2024-11-28 05:15:38,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:15:38,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248913223] [2024-11-28 05:15:38,258 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 05:15:38,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:15:38,296 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-28 05:15:38,296 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:15:38,821 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-28 05:15:38,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:15:38,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248913223] [2024-11-28 05:15:38,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248913223] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:15:38,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485062464] [2024-11-28 05:15:38,821 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 05:15:38,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:15:38,822 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:15:38,823 INFO L229 MonitoredProcess]: Starting monitored process 144 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:15:38,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Waiting until timeout for monitored process [2024-11-28 05:15:39,428 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-28 05:15:39,428 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:15:39,430 INFO L256 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-28 05:15:39,431 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:15:39,677 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:15:39,677 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 41 [2024-11-28 05:15:39,737 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-28 05:15:39,737 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:15:39,953 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-11-28 05:15:39,953 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 73 treesize of output 94 [2024-11-28 05:15:40,091 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:15:40,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485062464] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:15:40,091 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:15:40,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 26 [2024-11-28 05:15:40,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956535479] [2024-11-28 05:15:40,091 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:15:40,091 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-28 05:15:40,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:15:40,092 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-28 05:15:40,092 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2024-11-28 05:15:40,092 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 05:15:40,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 708 places, 645 transitions, 14694 flow. Second operand has 26 states, 26 states have (on average 4.884615384615385) internal successors, (127), 26 states have internal predecessors, (127), 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) [2024-11-28 05:15:40,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:15:40,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 05:15:40,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:15:43,597 INFO L124 PetriNetUnfolderBase]: 2566/4827 cut-off events. [2024-11-28 05:15:43,597 INFO L125 PetriNetUnfolderBase]: For 958835/958835 co-relation queries the response was YES. [2024-11-28 05:15:43,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85594 conditions, 4827 events. 2566/4827 cut-off events. For 958835/958835 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 34953 event pairs, 1130 based on Foata normal form. 19/4844 useless extension candidates. Maximal degree in co-relation 85358. Up to 4441 conditions per place. [2024-11-28 05:15:43,795 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 612 selfloop transitions, 65 changer transitions 10/688 dead transitions. [2024-11-28 05:15:43,795 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 727 places, 688 transitions, 17082 flow [2024-11-28 05:15:43,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-28 05:15:43,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-11-28 05:15:43,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 152 transitions. [2024-11-28 05:15:43,796 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.34545454545454546 [2024-11-28 05:15:43,796 INFO L175 Difference]: Start difference. First operand has 708 places, 645 transitions, 14694 flow. Second operand 20 states and 152 transitions. [2024-11-28 05:15:43,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 727 places, 688 transitions, 17082 flow [2024-11-28 05:15:51,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 703 places, 688 transitions, 16572 flow, removed 143 selfloop flow, removed 24 redundant places. [2024-11-28 05:15:51,371 INFO L231 Difference]: Finished difference. Result has 705 places, 644 transitions, 14497 flow [2024-11-28 05:15:51,372 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=14179, PETRI_DIFFERENCE_MINUEND_PLACES=684, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=644, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=579, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=14497, PETRI_PLACES=705, PETRI_TRANSITIONS=644} [2024-11-28 05:15:51,372 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 683 predicate places. [2024-11-28 05:15:51,372 INFO L471 AbstractCegarLoop]: Abstraction has has 705 places, 644 transitions, 14497 flow [2024-11-28 05:15:51,372 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.884615384615385) internal successors, (127), 26 states have internal predecessors, (127), 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) [2024-11-28 05:15:51,372 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:15:51,372 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:15:51,380 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Ended with exit code 0 [2024-11-28 05:15:51,573 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,144 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:15:51,573 INFO L396 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:15:51,574 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:15:51,574 INFO L85 PathProgramCache]: Analyzing trace with hash -1789373253, now seen corresponding path program 142 times [2024-11-28 05:15:51,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:15:51,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286514728] [2024-11-28 05:15:51,574 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 05:15:51,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:15:51,609 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 05:15:51,609 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:15:52,514 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 2 proven. 23 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-28 05:15:52,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:15:52,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286514728] [2024-11-28 05:15:52,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286514728] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:15:52,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873730335] [2024-11-28 05:15:52,515 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 05:15:52,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:15:52,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:15:52,516 INFO L229 MonitoredProcess]: Starting monitored process 145 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:15:52,517 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Waiting until timeout for monitored process [2024-11-28 05:15:53,160 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 05:15:53,160 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:15:53,162 INFO L256 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-28 05:15:53,163 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:15:53,336 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:15:53,336 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:15:53,526 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-11-28 05:15:53,527 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 83 [2024-11-28 05:15:53,602 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:15:53,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [873730335] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:15:53,602 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:15:53,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 9] total 30 [2024-11-28 05:15:53,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77271762] [2024-11-28 05:15:53,602 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:15:53,603 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-28 05:15:53,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:15:53,603 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-28 05:15:53,603 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=768, Unknown=0, NotChecked=0, Total=870 [2024-11-28 05:15:53,603 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 05:15:53,603 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 705 places, 644 transitions, 14497 flow. Second operand has 30 states, 30 states have (on average 4.733333333333333) internal successors, (142), 30 states have internal predecessors, (142), 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) [2024-11-28 05:15:53,603 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:15:53,603 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 05:15:53,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:15:57,041 INFO L124 PetriNetUnfolderBase]: 2584/4853 cut-off events. [2024-11-28 05:15:57,042 INFO L125 PetriNetUnfolderBase]: For 949449/949449 co-relation queries the response was YES. [2024-11-28 05:15:57,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86259 conditions, 4853 events. 2584/4853 cut-off events. For 949449/949449 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 35178 event pairs, 1158 based on Foata normal form. 8/4861 useless extension candidates. Maximal degree in co-relation 86024. Up to 4544 conditions per place. [2024-11-28 05:15:57,142 INFO L140 encePairwiseOnDemand]: 11/22 looper letters, 604 selfloop transitions, 72 changer transitions 0/677 dead transitions. [2024-11-28 05:15:57,142 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 724 places, 677 transitions, 17136 flow [2024-11-28 05:15:57,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-28 05:15:57,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-11-28 05:15:57,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 152 transitions. [2024-11-28 05:15:57,143 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.30039525691699603 [2024-11-28 05:15:57,143 INFO L175 Difference]: Start difference. First operand has 705 places, 644 transitions, 14497 flow. Second operand 23 states and 152 transitions. [2024-11-28 05:15:57,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 724 places, 677 transitions, 17136 flow [2024-11-28 05:16:03,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 709 places, 677 transitions, 16873 flow, removed 67 selfloop flow, removed 15 redundant places. [2024-11-28 05:16:03,940 INFO L231 Difference]: Finished difference. Result has 713 places, 648 transitions, 14535 flow [2024-11-28 05:16:03,940 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=14234, PETRI_DIFFERENCE_MINUEND_PLACES=687, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=644, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=572, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=14535, PETRI_PLACES=713, PETRI_TRANSITIONS=648} [2024-11-28 05:16:03,940 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 691 predicate places. [2024-11-28 05:16:03,940 INFO L471 AbstractCegarLoop]: Abstraction has has 713 places, 648 transitions, 14535 flow [2024-11-28 05:16:03,941 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 4.733333333333333) internal successors, (142), 30 states have internal predecessors, (142), 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) [2024-11-28 05:16:03,941 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:16:03,941 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:16:03,948 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Ended with exit code 0 [2024-11-28 05:16:04,141 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable150 [2024-11-28 05:16:04,141 INFO L396 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:16:04,142 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:16:04,142 INFO L85 PathProgramCache]: Analyzing trace with hash -567397246, now seen corresponding path program 143 times [2024-11-28 05:16:04,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:16:04,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559740687] [2024-11-28 05:16:04,142 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 05:16:04,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:16:04,179 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-11-28 05:16:04,179 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:16:04,692 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 2 proven. 19 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-28 05:16:04,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:16:04,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559740687] [2024-11-28 05:16:04,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559740687] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:16:04,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783315443] [2024-11-28 05:16:04,693 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 05:16:04,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:16:04,693 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:16:04,694 INFO L229 MonitoredProcess]: Starting monitored process 146 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:16:04,695 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Waiting until timeout for monitored process [2024-11-28 05:16:05,352 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-11-28 05:16:05,352 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:16:05,355 INFO L256 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-28 05:16:05,356 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:16:05,633 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-11-28 05:16:05,634 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2024-11-28 05:16:05,638 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-28 05:16:05,638 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:16:05,826 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-11-28 05:16:05,826 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 83 [2024-11-28 05:16:05,902 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:16:05,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783315443] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:16:05,902 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:16:05,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 9] total 29 [2024-11-28 05:16:05,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971894812] [2024-11-28 05:16:05,903 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:16:05,903 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-28 05:16:05,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:16:05,903 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-28 05:16:05,903 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=698, Unknown=0, NotChecked=0, Total=812 [2024-11-28 05:16:05,903 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 05:16:05,903 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 713 places, 648 transitions, 14535 flow. Second operand has 29 states, 29 states have (on average 5.0344827586206895) internal successors, (146), 29 states have internal predecessors, (146), 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) [2024-11-28 05:16:05,903 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:16:05,903 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 05:16:05,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:16:09,589 INFO L124 PetriNetUnfolderBase]: 2619/4913 cut-off events. [2024-11-28 05:16:09,589 INFO L125 PetriNetUnfolderBase]: For 975639/975639 co-relation queries the response was YES. [2024-11-28 05:16:09,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87330 conditions, 4913 events. 2619/4913 cut-off events. For 975639/975639 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 35640 event pairs, 1165 based on Foata normal form. 15/4928 useless extension candidates. Maximal degree in co-relation 87091. Up to 4584 conditions per place. [2024-11-28 05:16:09,730 INFO L140 encePairwiseOnDemand]: 11/22 looper letters, 636 selfloop transitions, 59 changer transitions 0/696 dead transitions. [2024-11-28 05:16:09,730 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 732 places, 696 transitions, 17198 flow [2024-11-28 05:16:09,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-28 05:16:09,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-11-28 05:16:09,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 146 transitions. [2024-11-28 05:16:09,731 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.33181818181818185 [2024-11-28 05:16:09,731 INFO L175 Difference]: Start difference. First operand has 713 places, 648 transitions, 14535 flow. Second operand 20 states and 146 transitions. [2024-11-28 05:16:09,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 732 places, 696 transitions, 17198 flow [2024-11-28 05:16:16,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 714 places, 696 transitions, 17057 flow, removed 3 selfloop flow, removed 18 redundant places. [2024-11-28 05:16:16,868 INFO L231 Difference]: Finished difference. Result has 718 places, 652 transitions, 14786 flow [2024-11-28 05:16:16,868 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=14394, PETRI_DIFFERENCE_MINUEND_PLACES=695, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=648, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=589, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=14786, PETRI_PLACES=718, PETRI_TRANSITIONS=652} [2024-11-28 05:16:16,869 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 696 predicate places. [2024-11-28 05:16:16,869 INFO L471 AbstractCegarLoop]: Abstraction has has 718 places, 652 transitions, 14786 flow [2024-11-28 05:16:16,869 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 5.0344827586206895) internal successors, (146), 29 states have internal predecessors, (146), 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) [2024-11-28 05:16:16,869 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:16:16,869 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:16:16,880 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Forceful destruction successful, exit code 0 [2024-11-28 05:16:17,069 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,146 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:16:17,069 INFO L396 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:16:17,070 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:16:17,070 INFO L85 PathProgramCache]: Analyzing trace with hash 39099179, now seen corresponding path program 144 times [2024-11-28 05:16:17,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:16:17,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883491419] [2024-11-28 05:16:17,070 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 05:16:17,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:16:17,109 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-11-28 05:16:17,109 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:16:17,633 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-28 05:16:17,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:16:17,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883491419] [2024-11-28 05:16:17,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883491419] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:16:17,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606349596] [2024-11-28 05:16:17,634 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 05:16:17,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:16:17,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:16:17,635 INFO L229 MonitoredProcess]: Starting monitored process 147 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:16:17,637 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Waiting until timeout for monitored process [2024-11-28 05:16:18,302 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-11-28 05:16:18,302 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:16:18,304 INFO L256 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-11-28 05:16:18,305 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:16:18,602 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:16:18,602 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 30 [2024-11-28 05:16:18,683 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-28 05:16:18,683 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:16:18,863 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-11-28 05:16:18,863 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2024-11-28 05:16:19,032 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:16:19,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606349596] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:16:19,033 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:16:19,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 9] total 29 [2024-11-28 05:16:19,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44089792] [2024-11-28 05:16:19,033 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:16:19,033 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-28 05:16:19,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:16:19,034 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-28 05:16:19,034 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=714, Unknown=0, NotChecked=0, Total=812 [2024-11-28 05:16:19,034 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 05:16:19,034 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 718 places, 652 transitions, 14786 flow. Second operand has 29 states, 29 states have (on average 4.758620689655173) internal successors, (138), 29 states have internal predecessors, (138), 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) [2024-11-28 05:16:19,034 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:16:19,034 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 05:16:19,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:16:23,717 INFO L124 PetriNetUnfolderBase]: 2602/4838 cut-off events. [2024-11-28 05:16:23,717 INFO L125 PetriNetUnfolderBase]: For 994159/994159 co-relation queries the response was YES. [2024-11-28 05:16:23,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87734 conditions, 4838 events. 2602/4838 cut-off events. For 994159/994159 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 34715 event pairs, 876 based on Foata normal form. 45/4881 useless extension candidates. Maximal degree in co-relation 87491. Up to 3836 conditions per place. [2024-11-28 05:16:23,830 INFO L140 encePairwiseOnDemand]: 11/22 looper letters, 548 selfloop transitions, 162 changer transitions 12/723 dead transitions. [2024-11-28 05:16:23,830 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 743 places, 723 transitions, 19321 flow [2024-11-28 05:16:23,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-11-28 05:16:23,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2024-11-28 05:16:23,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 227 transitions. [2024-11-28 05:16:23,831 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.33284457478005863 [2024-11-28 05:16:23,831 INFO L175 Difference]: Start difference. First operand has 718 places, 652 transitions, 14786 flow. Second operand 31 states and 227 transitions. [2024-11-28 05:16:23,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 743 places, 723 transitions, 19321 flow [2024-11-28 05:16:31,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 725 places, 723 transitions, 18926 flow, removed 129 selfloop flow, removed 18 redundant places. [2024-11-28 05:16:31,458 INFO L231 Difference]: Finished difference. Result has 733 places, 653 transitions, 15408 flow [2024-11-28 05:16:31,458 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=14146, PETRI_DIFFERENCE_MINUEND_PLACES=695, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=641, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=489, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=15408, PETRI_PLACES=733, PETRI_TRANSITIONS=653} [2024-11-28 05:16:31,458 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 711 predicate places. [2024-11-28 05:16:31,459 INFO L471 AbstractCegarLoop]: Abstraction has has 733 places, 653 transitions, 15408 flow [2024-11-28 05:16:31,459 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 4.758620689655173) internal successors, (138), 29 states have internal predecessors, (138), 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) [2024-11-28 05:16:31,459 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:16:31,459 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:16:31,466 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Ended with exit code 0 [2024-11-28 05:16:31,659 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,147 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:16:31,659 INFO L396 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:16:31,660 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:16:31,660 INFO L85 PathProgramCache]: Analyzing trace with hash -323045363, now seen corresponding path program 145 times [2024-11-28 05:16:31,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:16:31,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021372755] [2024-11-28 05:16:31,660 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 05:16:31,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:16:31,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:16:32,491 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-28 05:16:32,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:16:32,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021372755] [2024-11-28 05:16:32,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021372755] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:16:32,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740907430] [2024-11-28 05:16:32,491 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 05:16:32,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:16:32,491 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:16:32,493 INFO L229 MonitoredProcess]: Starting monitored process 148 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:16:32,494 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fcfa608-dbf1-4bdc-952b-169371d2bca6/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Waiting until timeout for monitored process [2024-11-28 05:16:33,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:16:33,124 INFO L256 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-28 05:16:33,125 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:16:33,271 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:16:33,271 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 81 treesize of output 45 [2024-11-28 05:16:33,343 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:16:33,343 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:16:33,537 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-11-28 05:16:33,537 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2024-11-28 05:16:33,624 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 05:16:33,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740907430] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:16:33,624 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:16:33,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 9] total 29 [2024-11-28 05:16:33,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343643519] [2024-11-28 05:16:33,624 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:16:33,624 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-28 05:16:33,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:16:33,625 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-28 05:16:33,625 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2024-11-28 05:16:33,625 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 05:16:33,625 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 733 places, 653 transitions, 15408 flow. Second operand has 29 states, 29 states have (on average 4.689655172413793) internal successors, (136), 29 states have internal predecessors, (136), 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) [2024-11-28 05:16:33,625 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:16:33,625 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 05:16:33,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:16:37,785 INFO L124 PetriNetUnfolderBase]: 2590/4814 cut-off events. [2024-11-28 05:16:37,785 INFO L125 PetriNetUnfolderBase]: For 1027423/1027423 co-relation queries the response was YES. [2024-11-28 05:16:37,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88855 conditions, 4814 events. 2590/4814 cut-off events. For 1027423/1027423 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 34452 event pairs, 922 based on Foata normal form. 8/4820 useless extension candidates. Maximal degree in co-relation 88606. Up to 3971 conditions per place. [2024-11-28 05:16:37,932 INFO L140 encePairwiseOnDemand]: 11/22 looper letters, 547 selfloop transitions, 147 changer transitions 4/699 dead transitions. [2024-11-28 05:16:37,932 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 752 places, 699 transitions, 18269 flow [2024-11-28 05:16:37,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-28 05:16:37,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-11-28 05:16:37,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 180 transitions. [2024-11-28 05:16:37,933 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.32727272727272727 [2024-11-28 05:16:37,933 INFO L175 Difference]: Start difference. First operand has 733 places, 653 transitions, 15408 flow. Second operand 25 states and 180 transitions. [2024-11-28 05:16:37,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 752 places, 699 transitions, 18269 flow