./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread/triangular-1.i --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_4f83061d-588f-48b8-a330-a3fb5e354036/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f83061d-588f-48b8-a330-a3fb5e354036/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_4f83061d-588f-48b8-a330-a3fb5e354036/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f83061d-588f-48b8-a330-a3fb5e354036/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread/triangular-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f83061d-588f-48b8-a330-a3fb5e354036/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_4f83061d-588f-48b8-a330-a3fb5e354036/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 b585114ab4aff9777d36c84f93f7abe0931f77338421f004296c8a8d328d3dfd --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-28 02:06:50,374 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-28 02:06:50,451 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f83061d-588f-48b8-a330-a3fb5e354036/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-28 02:06:50,456 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-28 02:06:50,456 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-28 02:06:50,497 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-28 02:06:50,498 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-28 02:06:50,498 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-28 02:06:50,499 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-28 02:06:50,499 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-28 02:06:50,501 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-28 02:06:50,501 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-28 02:06:50,501 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-28 02:06:50,501 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-28 02:06:50,502 INFO L153 SettingsManager]: * Use SBE=true [2024-11-28 02:06:50,502 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-28 02:06:50,502 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-28 02:06:50,502 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-28 02:06:50,502 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-28 02:06:50,502 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-28 02:06:50,502 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-28 02:06:50,502 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-28 02:06:50,502 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-28 02:06:50,502 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-28 02:06:50,502 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-28 02:06:50,502 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-28 02:06:50,503 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-28 02:06:50,503 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-28 02:06:50,503 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-28 02:06:50,503 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 02:06:50,503 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 02:06:50,503 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 02:06:50,503 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 02:06:50,503 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-28 02:06:50,503 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 02:06:50,503 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 02:06:50,503 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 02:06:50,503 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 02:06:50,504 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-28 02:06:50,504 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-28 02:06:50,504 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-11-28 02:06:50,504 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-28 02:06:50,504 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-28 02:06:50,504 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-28 02:06:50,505 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-28 02:06:50,505 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-28 02:06:50,506 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-28 02:06:50,506 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-28 02:06:50,506 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_4f83061d-588f-48b8-a330-a3fb5e354036/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 -> b585114ab4aff9777d36c84f93f7abe0931f77338421f004296c8a8d328d3dfd [2024-11-28 02:06:50,826 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-28 02:06:50,839 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-28 02:06:50,844 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-28 02:06:50,846 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-28 02:06:50,847 INFO L274 PluginConnector]: CDTParser initialized [2024-11-28 02:06:50,848 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f83061d-588f-48b8-a330-a3fb5e354036/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/pthread/triangular-1.i [2024-11-28 02:06:54,014 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f83061d-588f-48b8-a330-a3fb5e354036/bin/uautomizer-verify-aQ6SnzHsRB/data/17020b88c/654ddcb1551840d69f86fee346e6627c/FLAGbd3e2a185 [2024-11-28 02:06:54,329 INFO L384 CDTParser]: Found 1 translation units. [2024-11-28 02:06:54,330 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f83061d-588f-48b8-a330-a3fb5e354036/sv-benchmarks/c/pthread/triangular-1.i [2024-11-28 02:06:54,343 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f83061d-588f-48b8-a330-a3fb5e354036/bin/uautomizer-verify-aQ6SnzHsRB/data/17020b88c/654ddcb1551840d69f86fee346e6627c/FLAGbd3e2a185 [2024-11-28 02:06:54,583 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f83061d-588f-48b8-a330-a3fb5e354036/bin/uautomizer-verify-aQ6SnzHsRB/data/17020b88c/654ddcb1551840d69f86fee346e6627c [2024-11-28 02:06:54,586 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-28 02:06:54,589 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-28 02:06:54,591 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-28 02:06:54,591 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-28 02:06:54,596 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-28 02:06:54,597 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 02:06:54" (1/1) ... [2024-11-28 02:06:54,600 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5025b44f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:06:54, skipping insertion in model container [2024-11-28 02:06:54,600 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 02:06:54" (1/1) ... [2024-11-28 02:06:54,649 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-28 02:06:54,985 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_4f83061d-588f-48b8-a330-a3fb5e354036/sv-benchmarks/c/pthread/triangular-1.i[30950,30963] [2024-11-28 02:06:54,989 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 02:06:54,999 INFO L200 MainTranslator]: Completed pre-run [2024-11-28 02:06:55,053 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_4f83061d-588f-48b8-a330-a3fb5e354036/sv-benchmarks/c/pthread/triangular-1.i[30950,30963] [2024-11-28 02:06:55,054 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 02:06:55,092 INFO L204 MainTranslator]: Completed translation [2024-11-28 02:06:55,092 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:06:55 WrapperNode [2024-11-28 02:06:55,093 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-28 02:06:55,094 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-28 02:06:55,094 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-28 02:06:55,094 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-28 02:06:55,102 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:06:55" (1/1) ... [2024-11-28 02:06:55,118 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:06:55" (1/1) ... [2024-11-28 02:06:55,140 INFO L138 Inliner]: procedures = 168, calls = 16, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 37 [2024-11-28 02:06:55,141 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-28 02:06:55,141 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-28 02:06:55,142 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-28 02:06:55,142 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-28 02:06:55,151 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:06:55" (1/1) ... [2024-11-28 02:06:55,151 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:06:55" (1/1) ... [2024-11-28 02:06:55,153 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:06:55" (1/1) ... [2024-11-28 02:06:55,170 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-11-28 02:06:55,170 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:06:55" (1/1) ... [2024-11-28 02:06:55,171 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:06:55" (1/1) ... [2024-11-28 02:06:55,181 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:06:55" (1/1) ... [2024-11-28 02:06:55,182 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:06:55" (1/1) ... [2024-11-28 02:06:55,185 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:06:55" (1/1) ... [2024-11-28 02:06:55,186 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:06:55" (1/1) ... [2024-11-28 02:06:55,187 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:06:55" (1/1) ... [2024-11-28 02:06:55,189 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-28 02:06:55,190 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-28 02:06:55,190 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-28 02:06:55,190 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-28 02:06:55,192 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:06:55" (1/1) ... [2024-11-28 02:06:55,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 02:06:55,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f83061d-588f-48b8-a330-a3fb5e354036/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:06:55,237 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f83061d-588f-48b8-a330-a3fb5e354036/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-28 02:06:55,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f83061d-588f-48b8-a330-a3fb5e354036/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-28 02:06:55,272 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2024-11-28 02:06:55,276 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2024-11-28 02:06:55,276 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2024-11-28 02:06:55,277 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2024-11-28 02:06:55,277 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-28 02:06:55,277 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-28 02:06:55,278 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-28 02:06:55,278 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-28 02:06:55,278 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-28 02:06:55,278 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-28 02:06:55,279 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 02:06:55,437 INFO L234 CfgBuilder]: Building ICFG [2024-11-28 02:06:55,440 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-28 02:06:55,619 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-28 02:06:55,619 INFO L283 CfgBuilder]: Performing block encoding [2024-11-28 02:06:55,721 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-28 02:06:55,721 INFO L312 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-28 02:06:55,721 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 02:06:55 BoogieIcfgContainer [2024-11-28 02:06:55,721 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-28 02:06:55,724 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-28 02:06:55,724 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-28 02:06:55,729 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-28 02:06:55,733 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 02:06:54" (1/3) ... [2024-11-28 02:06:55,734 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35be1eea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 02:06:55, skipping insertion in model container [2024-11-28 02:06:55,734 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:06:55" (2/3) ... [2024-11-28 02:06:55,734 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35be1eea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 02:06:55, skipping insertion in model container [2024-11-28 02:06:55,735 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 02:06:55" (3/3) ... [2024-11-28 02:06:55,736 INFO L128 eAbstractionObserver]: Analyzing ICFG triangular-1.i [2024-11-28 02:06:55,751 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-28 02:06:55,752 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG triangular-1.i that has 3 procedures, 22 locations, 1 initial locations, 2 loop locations, and 1 error locations. [2024-11-28 02:06:55,752 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-28 02:06:55,802 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-28 02:06:55,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 28 places, 24 transitions, 56 flow [2024-11-28 02:06:55,865 INFO L124 PetriNetUnfolderBase]: 3/22 cut-off events. [2024-11-28 02:06:55,867 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-28 02:06:55,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29 conditions, 22 events. 3/22 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 30 event pairs, 0 based on Foata normal form. 0/18 useless extension candidates. Maximal degree in co-relation 22. Up to 2 conditions per place. [2024-11-28 02:06:55,873 INFO L82 GeneralOperation]: Start removeDead. Operand has 28 places, 24 transitions, 56 flow [2024-11-28 02:06:55,878 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 26 places, 22 transitions, 50 flow [2024-11-28 02:06:55,891 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-28 02:06:55,902 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;@488143d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-28 02:06:55,902 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-11-28 02:06:55,913 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-28 02:06:55,913 INFO L124 PetriNetUnfolderBase]: 3/20 cut-off events. [2024-11-28 02:06:55,913 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-28 02:06:55,913 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:06:55,914 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:06:55,914 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 02:06:55,919 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:06:55,919 INFO L85 PathProgramCache]: Analyzing trace with hash -1043373254, now seen corresponding path program 1 times [2024-11-28 02:06:55,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:06:55,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604799964] [2024-11-28 02:06:55,926 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:06:55,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:06:56,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:06:56,527 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 02:06:56,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:06:56,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604799964] [2024-11-28 02:06:56,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604799964] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:06:56,530 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:06:56,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 02:06:56,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511077367] [2024-11-28 02:06:56,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:06:56,542 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 02:06:56,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:06:56,574 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 02:06:56,574 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 02:06:56,601 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2024-11-28 02:06:56,604 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 22 transitions, 50 flow. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:06:56,605 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:06:56,607 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2024-11-28 02:06:56,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:06:56,969 INFO L124 PetriNetUnfolderBase]: 321/543 cut-off events. [2024-11-28 02:06:56,969 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-28 02:06:56,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1055 conditions, 543 events. 321/543 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2162 event pairs, 62 based on Foata normal form. 12/542 useless extension candidates. Maximal degree in co-relation 1045. Up to 221 conditions per place. [2024-11-28 02:06:56,979 INFO L140 encePairwiseOnDemand]: 16/24 looper letters, 25 selfloop transitions, 4 changer transitions 22/54 dead transitions. [2024-11-28 02:06:56,979 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 54 transitions, 216 flow [2024-11-28 02:06:56,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 02:06:56,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-28 02:06:56,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 84 transitions. [2024-11-28 02:06:56,996 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-11-28 02:06:56,999 INFO L175 Difference]: Start difference. First operand has 26 places, 22 transitions, 50 flow. Second operand 6 states and 84 transitions. [2024-11-28 02:06:57,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 54 transitions, 216 flow [2024-11-28 02:06:57,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 54 transitions, 214 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-28 02:06:57,012 INFO L231 Difference]: Finished difference. Result has 33 places, 22 transitions, 71 flow [2024-11-28 02:06:57,015 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=71, PETRI_PLACES=33, PETRI_TRANSITIONS=22} [2024-11-28 02:06:57,021 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 7 predicate places. [2024-11-28 02:06:57,022 INFO L471 AbstractCegarLoop]: Abstraction has has 33 places, 22 transitions, 71 flow [2024-11-28 02:06:57,022 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:06:57,022 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:06:57,022 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:06:57,023 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-28 02:06:57,023 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 02:06:57,023 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:06:57,024 INFO L85 PathProgramCache]: Analyzing trace with hash 1573568646, now seen corresponding path program 1 times [2024-11-28 02:06:57,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:06:57,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876366970] [2024-11-28 02:06:57,024 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:06:57,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:06:57,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:06:57,248 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 02:06:57,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:06:57,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876366970] [2024-11-28 02:06:57,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876366970] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:06:57,249 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:06:57,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 02:06:57,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054273112] [2024-11-28 02:06:57,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:06:57,250 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 02:06:57,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:06:57,251 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 02:06:57,251 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-28 02:06:57,309 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2024-11-28 02:06:57,310 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 22 transitions, 71 flow. Second operand has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:06:57,310 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:06:57,310 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2024-11-28 02:06:57,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:06:57,660 INFO L124 PetriNetUnfolderBase]: 382/689 cut-off events. [2024-11-28 02:06:57,660 INFO L125 PetriNetUnfolderBase]: For 285/291 co-relation queries the response was YES. [2024-11-28 02:06:57,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1586 conditions, 689 events. 382/689 cut-off events. For 285/291 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2921 event pairs, 65 based on Foata normal form. 33/721 useless extension candidates. Maximal degree in co-relation 1572. Up to 246 conditions per place. [2024-11-28 02:06:57,671 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 46 selfloop transitions, 9 changer transitions 20/78 dead transitions. [2024-11-28 02:06:57,671 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 78 transitions, 379 flow [2024-11-28 02:06:57,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-28 02:06:57,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-28 02:06:57,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 117 transitions. [2024-11-28 02:06:57,674 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2024-11-28 02:06:57,674 INFO L175 Difference]: Start difference. First operand has 33 places, 22 transitions, 71 flow. Second operand 9 states and 117 transitions. [2024-11-28 02:06:57,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 78 transitions, 379 flow [2024-11-28 02:06:57,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 78 transitions, 363 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-11-28 02:06:57,680 INFO L231 Difference]: Finished difference. Result has 42 places, 31 transitions, 156 flow [2024-11-28 02:06:57,680 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=67, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=156, PETRI_PLACES=42, PETRI_TRANSITIONS=31} [2024-11-28 02:06:57,681 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 16 predicate places. [2024-11-28 02:06:57,681 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 31 transitions, 156 flow [2024-11-28 02:06:57,681 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:06:57,681 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:06:57,681 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:06:57,682 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-28 02:06:57,682 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 02:06:57,682 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:06:57,683 INFO L85 PathProgramCache]: Analyzing trace with hash 1590549516, now seen corresponding path program 2 times [2024-11-28 02:06:57,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:06:57,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119486456] [2024-11-28 02:06:57,683 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:06:57,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:06:57,696 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-28 02:06:57,696 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:06:57,888 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 02:06:57,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:06:57,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119486456] [2024-11-28 02:06:57,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119486456] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:06:57,888 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:06:57,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 02:06:57,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267889943] [2024-11-28 02:06:57,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:06:57,889 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 02:06:57,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:06:57,890 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 02:06:57,890 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-28 02:06:57,916 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2024-11-28 02:06:57,916 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 31 transitions, 156 flow. Second operand has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:06:57,916 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:06:57,916 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2024-11-28 02:06:57,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:06:58,212 INFO L124 PetriNetUnfolderBase]: 328/605 cut-off events. [2024-11-28 02:06:58,212 INFO L125 PetriNetUnfolderBase]: For 1001/1013 co-relation queries the response was YES. [2024-11-28 02:06:58,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1734 conditions, 605 events. 328/605 cut-off events. For 1001/1013 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2530 event pairs, 65 based on Foata normal form. 57/661 useless extension candidates. Maximal degree in co-relation 1713. Up to 234 conditions per place. [2024-11-28 02:06:58,217 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 38 selfloop transitions, 9 changer transitions 28/78 dead transitions. [2024-11-28 02:06:58,217 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 78 transitions, 496 flow [2024-11-28 02:06:58,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 02:06:58,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-28 02:06:58,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 103 transitions. [2024-11-28 02:06:58,219 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5364583333333334 [2024-11-28 02:06:58,219 INFO L175 Difference]: Start difference. First operand has 42 places, 31 transitions, 156 flow. Second operand 8 states and 103 transitions. [2024-11-28 02:06:58,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 78 transitions, 496 flow [2024-11-28 02:06:58,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 78 transitions, 488 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-11-28 02:06:58,230 INFO L231 Difference]: Finished difference. Result has 49 places, 33 transitions, 210 flow [2024-11-28 02:06:58,230 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=210, PETRI_PLACES=49, PETRI_TRANSITIONS=33} [2024-11-28 02:06:58,232 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 23 predicate places. [2024-11-28 02:06:58,232 INFO L471 AbstractCegarLoop]: Abstraction has has 49 places, 33 transitions, 210 flow [2024-11-28 02:06:58,232 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:06:58,232 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:06:58,232 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:06:58,232 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-28 02:06:58,232 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 02:06:58,234 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:06:58,234 INFO L85 PathProgramCache]: Analyzing trace with hash -2116420421, now seen corresponding path program 1 times [2024-11-28 02:06:58,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:06:58,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599851840] [2024-11-28 02:06:58,234 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:06:58,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:06:58,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:06:58,409 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 02:06:58,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:06:58,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599851840] [2024-11-28 02:06:58,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599851840] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:06:58,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:06:58,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-28 02:06:58,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565635453] [2024-11-28 02:06:58,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:06:58,410 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-28 02:06:58,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:06:58,411 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-28 02:06:58,411 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-28 02:06:58,429 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2024-11-28 02:06:58,430 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 33 transitions, 210 flow. Second operand has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:06:58,430 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:06:58,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2024-11-28 02:06:58,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:06:58,833 INFO L124 PetriNetUnfolderBase]: 337/617 cut-off events. [2024-11-28 02:06:58,833 INFO L125 PetriNetUnfolderBase]: For 1712/1724 co-relation queries the response was YES. [2024-11-28 02:06:58,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1942 conditions, 617 events. 337/617 cut-off events. For 1712/1724 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2601 event pairs, 68 based on Foata normal form. 30/646 useless extension candidates. Maximal degree in co-relation 1916. Up to 237 conditions per place. [2024-11-28 02:06:58,838 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 46 selfloop transitions, 16 changer transitions 24/89 dead transitions. [2024-11-28 02:06:58,838 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 89 transitions, 607 flow [2024-11-28 02:06:58,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-28 02:06:58,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-28 02:06:58,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 135 transitions. [2024-11-28 02:06:58,848 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5113636363636364 [2024-11-28 02:06:58,848 INFO L175 Difference]: Start difference. First operand has 49 places, 33 transitions, 210 flow. Second operand 11 states and 135 transitions. [2024-11-28 02:06:58,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 89 transitions, 607 flow [2024-11-28 02:06:58,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 89 transitions, 540 flow, removed 24 selfloop flow, removed 7 redundant places. [2024-11-28 02:06:58,859 INFO L231 Difference]: Finished difference. Result has 54 places, 39 transitions, 279 flow [2024-11-28 02:06:58,859 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=279, PETRI_PLACES=54, PETRI_TRANSITIONS=39} [2024-11-28 02:06:58,860 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 28 predicate places. [2024-11-28 02:06:58,860 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 39 transitions, 279 flow [2024-11-28 02:06:58,860 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:06:58,860 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:06:58,861 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:06:58,861 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-28 02:06:58,861 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 02:06:58,861 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:06:58,862 INFO L85 PathProgramCache]: Analyzing trace with hash 1571665463, now seen corresponding path program 2 times [2024-11-28 02:06:58,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:06:58,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603806700] [2024-11-28 02:06:58,862 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:06:58,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:06:58,879 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-28 02:06:58,879 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:06:59,075 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 02:06:59,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:06:59,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603806700] [2024-11-28 02:06:59,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603806700] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:06:59,076 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:06:59,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-28 02:06:59,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460599919] [2024-11-28 02:06:59,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:06:59,076 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-28 02:06:59,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:06:59,078 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-28 02:06:59,078 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-28 02:06:59,102 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2024-11-28 02:06:59,102 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 39 transitions, 279 flow. Second operand has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:06:59,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:06:59,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2024-11-28 02:06:59,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:06:59,499 INFO L124 PetriNetUnfolderBase]: 508/929 cut-off events. [2024-11-28 02:06:59,499 INFO L125 PetriNetUnfolderBase]: For 3237/3255 co-relation queries the response was YES. [2024-11-28 02:06:59,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3073 conditions, 929 events. 508/929 cut-off events. For 3237/3255 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 4236 event pairs, 53 based on Foata normal form. 45/971 useless extension candidates. Maximal degree in co-relation 3046. Up to 253 conditions per place. [2024-11-28 02:06:59,509 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 57 selfloop transitions, 20 changer transitions 23/103 dead transitions. [2024-11-28 02:06:59,510 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 103 transitions, 771 flow [2024-11-28 02:06:59,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-28 02:06:59,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-28 02:06:59,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 141 transitions. [2024-11-28 02:06:59,512 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5340909090909091 [2024-11-28 02:06:59,512 INFO L175 Difference]: Start difference. First operand has 54 places, 39 transitions, 279 flow. Second operand 11 states and 141 transitions. [2024-11-28 02:06:59,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 103 transitions, 771 flow [2024-11-28 02:06:59,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 103 transitions, 705 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-11-28 02:06:59,527 INFO L231 Difference]: Finished difference. Result has 65 places, 45 transitions, 376 flow [2024-11-28 02:06:59,528 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=239, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=376, PETRI_PLACES=65, PETRI_TRANSITIONS=45} [2024-11-28 02:06:59,543 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 39 predicate places. [2024-11-28 02:06:59,543 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 45 transitions, 376 flow [2024-11-28 02:06:59,544 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:06:59,544 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:06:59,544 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:06:59,544 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-28 02:06:59,544 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 02:06:59,545 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:06:59,545 INFO L85 PathProgramCache]: Analyzing trace with hash 1789935611, now seen corresponding path program 3 times [2024-11-28 02:06:59,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:06:59,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299676905] [2024-11-28 02:06:59,545 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 02:06:59,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:06:59,563 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-11-28 02:06:59,563 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:06:59,719 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 02:06:59,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:06:59,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299676905] [2024-11-28 02:06:59,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299676905] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:06:59,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:06:59,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-28 02:06:59,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782270211] [2024-11-28 02:06:59,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:06:59,720 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-28 02:06:59,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:06:59,721 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-28 02:06:59,721 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-28 02:06:59,742 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2024-11-28 02:06:59,742 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 45 transitions, 376 flow. Second operand has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:06:59,743 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:06:59,743 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2024-11-28 02:06:59,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:07:00,132 INFO L124 PetriNetUnfolderBase]: 481/884 cut-off events. [2024-11-28 02:07:00,132 INFO L125 PetriNetUnfolderBase]: For 5184/5202 co-relation queries the response was YES. [2024-11-28 02:07:00,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3384 conditions, 884 events. 481/884 cut-off events. For 5184/5202 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 3986 event pairs, 59 based on Foata normal form. 63/944 useless extension candidates. Maximal degree in co-relation 3352. Up to 154 conditions per place. [2024-11-28 02:07:00,139 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 45 selfloop transitions, 25 changer transitions 33/106 dead transitions. [2024-11-28 02:07:00,140 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 106 transitions, 964 flow [2024-11-28 02:07:00,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-28 02:07:00,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-28 02:07:00,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 138 transitions. [2024-11-28 02:07:00,141 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5227272727272727 [2024-11-28 02:07:00,141 INFO L175 Difference]: Start difference. First operand has 65 places, 45 transitions, 376 flow. Second operand 11 states and 138 transitions. [2024-11-28 02:07:00,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 106 transitions, 964 flow [2024-11-28 02:07:00,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 106 transitions, 893 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-11-28 02:07:00,161 INFO L231 Difference]: Finished difference. Result has 73 places, 48 transitions, 475 flow [2024-11-28 02:07:00,161 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=335, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=475, PETRI_PLACES=73, PETRI_TRANSITIONS=48} [2024-11-28 02:07:00,162 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 47 predicate places. [2024-11-28 02:07:00,162 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 48 transitions, 475 flow [2024-11-28 02:07:00,162 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:07:00,162 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:07:00,162 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:07:00,162 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-28 02:07:00,163 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 02:07:00,163 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:07:00,164 INFO L85 PathProgramCache]: Analyzing trace with hash 1222875463, now seen corresponding path program 1 times [2024-11-28 02:07:00,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:07:00,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617565846] [2024-11-28 02:07:00,165 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:07:00,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:07:00,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:07:00,350 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:07:00,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:07:00,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617565846] [2024-11-28 02:07:00,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617565846] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:07:00,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647246045] [2024-11-28 02:07:00,352 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:07:00,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:07:00,352 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f83061d-588f-48b8-a330-a3fb5e354036/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:07:00,354 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f83061d-588f-48b8-a330-a3fb5e354036/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:07:00,357 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f83061d-588f-48b8-a330-a3fb5e354036/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-28 02:07:00,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:07:00,428 INFO L256 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-28 02:07:00,432 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:07:00,549 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:07:00,549 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:07:00,739 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:07:00,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647246045] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:07:00,739 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:07:00,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2024-11-28 02:07:00,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948825125] [2024-11-28 02:07:00,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:07:00,740 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-28 02:07:00,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:07:00,741 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-28 02:07:00,741 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2024-11-28 02:07:00,765 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2024-11-28 02:07:00,766 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 48 transitions, 475 flow. Second operand has 13 states, 13 states have (on average 7.153846153846154) internal successors, (93), 13 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:07:00,766 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:07:00,766 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2024-11-28 02:07:00,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:07:01,482 INFO L124 PetriNetUnfolderBase]: 589/1094 cut-off events. [2024-11-28 02:07:01,482 INFO L125 PetriNetUnfolderBase]: For 10490/10508 co-relation queries the response was YES. [2024-11-28 02:07:01,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4735 conditions, 1094 events. 589/1094 cut-off events. For 10490/10508 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 4703 event pairs, 149 based on Foata normal form. 81/1174 useless extension candidates. Maximal degree in co-relation 4699. Up to 522 conditions per place. [2024-11-28 02:07:01,491 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 67 selfloop transitions, 17 changer transitions 67/154 dead transitions. [2024-11-28 02:07:01,491 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 154 transitions, 1547 flow [2024-11-28 02:07:01,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-28 02:07:01,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-11-28 02:07:01,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 231 transitions. [2024-11-28 02:07:01,493 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.506578947368421 [2024-11-28 02:07:01,494 INFO L175 Difference]: Start difference. First operand has 73 places, 48 transitions, 475 flow. Second operand 19 states and 231 transitions. [2024-11-28 02:07:01,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 154 transitions, 1547 flow [2024-11-28 02:07:01,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 154 transitions, 1448 flow, removed 33 selfloop flow, removed 8 redundant places. [2024-11-28 02:07:01,515 INFO L231 Difference]: Finished difference. Result has 93 places, 54 transitions, 604 flow [2024-11-28 02:07:01,515 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=406, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=604, PETRI_PLACES=93, PETRI_TRANSITIONS=54} [2024-11-28 02:07:01,515 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 67 predicate places. [2024-11-28 02:07:01,516 INFO L471 AbstractCegarLoop]: Abstraction has has 93 places, 54 transitions, 604 flow [2024-11-28 02:07:01,516 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.153846153846154) internal successors, (93), 13 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:07:01,516 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:07:01,516 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:07:01,526 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f83061d-588f-48b8-a330-a3fb5e354036/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-28 02:07:01,720 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f83061d-588f-48b8-a330-a3fb5e354036/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:07:01,721 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 02:07:01,721 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:07:01,721 INFO L85 PathProgramCache]: Analyzing trace with hash 1884795689, now seen corresponding path program 2 times [2024-11-28 02:07:01,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:07:01,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353946186] [2024-11-28 02:07:01,722 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:07:01,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:07:01,735 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:07:01,736 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:07:01,905 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:07:01,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:07:01,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353946186] [2024-11-28 02:07:01,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353946186] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:07:01,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150842465] [2024-11-28 02:07:01,906 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:07:01,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:07:01,906 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f83061d-588f-48b8-a330-a3fb5e354036/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:07:01,909 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f83061d-588f-48b8-a330-a3fb5e354036/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:07:01,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f83061d-588f-48b8-a330-a3fb5e354036/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-28 02:07:01,970 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:07:01,970 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:07:01,971 INFO L256 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-28 02:07:01,973 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:07:02,038 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:07:02,038 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:07:02,197 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:07:02,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150842465] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:07:02,198 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:07:02,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2024-11-28 02:07:02,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722864956] [2024-11-28 02:07:02,198 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:07:02,199 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-28 02:07:02,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:07:02,199 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-28 02:07:02,199 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2024-11-28 02:07:02,225 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2024-11-28 02:07:02,226 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 54 transitions, 604 flow. Second operand has 13 states, 13 states have (on average 7.153846153846154) internal successors, (93), 13 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:07:02,226 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:07:02,226 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2024-11-28 02:07:02,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:07:03,143 INFO L124 PetriNetUnfolderBase]: 877/1613 cut-off events. [2024-11-28 02:07:03,144 INFO L125 PetriNetUnfolderBase]: For 36575/36593 co-relation queries the response was YES. [2024-11-28 02:07:03,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9220 conditions, 1613 events. 877/1613 cut-off events. For 36575/36593 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 7704 event pairs, 68 based on Foata normal form. 90/1702 useless extension candidates. Maximal degree in co-relation 9174. Up to 312 conditions per place. [2024-11-28 02:07:03,160 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 88 selfloop transitions, 47 changer transitions 80/218 dead transitions. [2024-11-28 02:07:03,160 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 218 transitions, 2806 flow [2024-11-28 02:07:03,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-28 02:07:03,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-11-28 02:07:03,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 334 transitions. [2024-11-28 02:07:03,163 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5154320987654321 [2024-11-28 02:07:03,163 INFO L175 Difference]: Start difference. First operand has 93 places, 54 transitions, 604 flow. Second operand 27 states and 334 transitions. [2024-11-28 02:07:03,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 218 transitions, 2806 flow [2024-11-28 02:07:03,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 218 transitions, 2262 flow, removed 261 selfloop flow, removed 12 redundant places. [2024-11-28 02:07:03,209 INFO L231 Difference]: Finished difference. Result has 119 places, 70 transitions, 1007 flow [2024-11-28 02:07:03,209 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=470, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=1007, PETRI_PLACES=119, PETRI_TRANSITIONS=70} [2024-11-28 02:07:03,210 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 93 predicate places. [2024-11-28 02:07:03,210 INFO L471 AbstractCegarLoop]: Abstraction has has 119 places, 70 transitions, 1007 flow [2024-11-28 02:07:03,210 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.153846153846154) internal successors, (93), 13 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:07:03,210 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:07:03,210 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:07:03,219 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f83061d-588f-48b8-a330-a3fb5e354036/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-28 02:07:03,411 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f83061d-588f-48b8-a330-a3fb5e354036/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-11-28 02:07:03,411 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 02:07:03,412 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:07:03,412 INFO L85 PathProgramCache]: Analyzing trace with hash 917738468, now seen corresponding path program 1 times [2024-11-28 02:07:03,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:07:03,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177244066] [2024-11-28 02:07:03,413 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:07:03,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:07:03,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:07:03,630 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:07:03,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:07:03,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177244066] [2024-11-28 02:07:03,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177244066] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:07:03,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721982662] [2024-11-28 02:07:03,631 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:07:03,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:07:03,631 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f83061d-588f-48b8-a330-a3fb5e354036/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:07:03,633 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f83061d-588f-48b8-a330-a3fb5e354036/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:07:03,637 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f83061d-588f-48b8-a330-a3fb5e354036/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-28 02:07:03,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:07:03,695 INFO L256 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-28 02:07:03,697 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:07:03,763 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:07:03,763 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:07:03,946 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:07:03,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1721982662] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:07:03,946 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:07:03,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2024-11-28 02:07:03,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131185380] [2024-11-28 02:07:03,947 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:07:03,947 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-28 02:07:03,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:07:03,948 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-28 02:07:03,948 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2024-11-28 02:07:03,983 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2024-11-28 02:07:03,984 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 70 transitions, 1007 flow. Second operand has 15 states, 15 states have (on average 7.066666666666666) internal successors, (106), 15 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 02:07:03,984 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:07:03,984 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2024-11-28 02:07:03,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:07:05,061 INFO L124 PetriNetUnfolderBase]: 1111/2082 cut-off events. [2024-11-28 02:07:05,061 INFO L125 PetriNetUnfolderBase]: For 86453/86459 co-relation queries the response was YES. [2024-11-28 02:07:05,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14592 conditions, 2082 events. 1111/2082 cut-off events. For 86453/86459 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 10759 event pairs, 153 based on Foata normal form. 69/2148 useless extension candidates. Maximal degree in co-relation 14534. Up to 490 conditions per place. [2024-11-28 02:07:05,085 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 99 selfloop transitions, 51 changer transitions 67/220 dead transitions. [2024-11-28 02:07:05,085 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 220 transitions, 3619 flow [2024-11-28 02:07:05,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-28 02:07:05,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-11-28 02:07:05,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 309 transitions. [2024-11-28 02:07:05,087 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.515 [2024-11-28 02:07:05,087 INFO L175 Difference]: Start difference. First operand has 119 places, 70 transitions, 1007 flow. Second operand 25 states and 309 transitions. [2024-11-28 02:07:05,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 220 transitions, 3619 flow [2024-11-28 02:07:05,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 220 transitions, 3039 flow, removed 274 selfloop flow, removed 15 redundant places. [2024-11-28 02:07:05,196 INFO L231 Difference]: Finished difference. Result has 135 places, 81 transitions, 1293 flow [2024-11-28 02:07:05,196 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=737, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=1293, PETRI_PLACES=135, PETRI_TRANSITIONS=81} [2024-11-28 02:07:05,197 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 109 predicate places. [2024-11-28 02:07:05,197 INFO L471 AbstractCegarLoop]: Abstraction has has 135 places, 81 transitions, 1293 flow [2024-11-28 02:07:05,197 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 7.066666666666666) internal successors, (106), 15 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 02:07:05,197 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:07:05,197 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:07:05,206 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f83061d-588f-48b8-a330-a3fb5e354036/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-28 02:07:05,398 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f83061d-588f-48b8-a330-a3fb5e354036/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:07:05,398 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 02:07:05,399 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:07:05,399 INFO L85 PathProgramCache]: Analyzing trace with hash 1289920896, now seen corresponding path program 2 times [2024-11-28 02:07:05,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:07:05,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735545688] [2024-11-28 02:07:05,399 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:07:05,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:07:05,412 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:07:05,413 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:07:05,599 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:07:05,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:07:05,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735545688] [2024-11-28 02:07:05,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735545688] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:07:05,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168516991] [2024-11-28 02:07:05,600 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:07:05,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:07:05,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f83061d-588f-48b8-a330-a3fb5e354036/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:07:05,602 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f83061d-588f-48b8-a330-a3fb5e354036/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:07:05,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f83061d-588f-48b8-a330-a3fb5e354036/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-28 02:07:05,662 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:07:05,662 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:07:05,663 INFO L256 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-28 02:07:05,664 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:07:05,720 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:07:05,720 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:07:05,885 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:07:05,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1168516991] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:07:05,885 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:07:05,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2024-11-28 02:07:05,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901669406] [2024-11-28 02:07:05,886 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:07:05,886 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-28 02:07:05,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:07:05,887 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-28 02:07:05,887 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2024-11-28 02:07:05,925 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2024-11-28 02:07:05,926 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 81 transitions, 1293 flow. Second operand has 16 states, 16 states have (on average 7.0625) internal successors, (113), 16 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:07:05,926 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:07:05,926 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2024-11-28 02:07:05,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:07:07,206 INFO L124 PetriNetUnfolderBase]: 1192/2266 cut-off events. [2024-11-28 02:07:07,207 INFO L125 PetriNetUnfolderBase]: For 130343/130349 co-relation queries the response was YES. [2024-11-28 02:07:07,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16874 conditions, 2266 events. 1192/2266 cut-off events. For 130343/130349 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 11871 event pairs, 38 based on Foata normal form. 132/2397 useless extension candidates. Maximal degree in co-relation 16809. Up to 480 conditions per place. [2024-11-28 02:07:07,230 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 89 selfloop transitions, 76 changer transitions 93/261 dead transitions. [2024-11-28 02:07:07,230 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 261 transitions, 4879 flow [2024-11-28 02:07:07,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-28 02:07:07,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-11-28 02:07:07,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 345 transitions. [2024-11-28 02:07:07,233 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5133928571428571 [2024-11-28 02:07:07,233 INFO L175 Difference]: Start difference. First operand has 135 places, 81 transitions, 1293 flow. Second operand 28 states and 345 transitions. [2024-11-28 02:07:07,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 261 transitions, 4879 flow [2024-11-28 02:07:07,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 261 transitions, 4140 flow, removed 336 selfloop flow, removed 18 redundant places. [2024-11-28 02:07:07,462 INFO L231 Difference]: Finished difference. Result has 154 places, 100 transitions, 1854 flow [2024-11-28 02:07:07,463 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=997, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=1854, PETRI_PLACES=154, PETRI_TRANSITIONS=100} [2024-11-28 02:07:07,463 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 128 predicate places. [2024-11-28 02:07:07,463 INFO L471 AbstractCegarLoop]: Abstraction has has 154 places, 100 transitions, 1854 flow [2024-11-28 02:07:07,464 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 7.0625) internal successors, (113), 16 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:07:07,464 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:07:07,464 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:07:07,475 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f83061d-588f-48b8-a330-a3fb5e354036/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-28 02:07:07,664 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f83061d-588f-48b8-a330-a3fb5e354036/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:07:07,665 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 02:07:07,665 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:07:07,666 INFO L85 PathProgramCache]: Analyzing trace with hash 1279496404, now seen corresponding path program 3 times [2024-11-28 02:07:07,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:07:07,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894333992] [2024-11-28 02:07:07,666 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 02:07:07,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:07:07,685 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-28 02:07:07,686 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:07:07,956 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:07:07,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:07:07,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894333992] [2024-11-28 02:07:07,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894333992] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:07:07,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550856060] [2024-11-28 02:07:07,957 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 02:07:07,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:07:07,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f83061d-588f-48b8-a330-a3fb5e354036/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:07:07,959 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f83061d-588f-48b8-a330-a3fb5e354036/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:07:07,963 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f83061d-588f-48b8-a330-a3fb5e354036/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-28 02:07:08,022 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-28 02:07:08,022 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:07:08,023 INFO L256 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-28 02:07:08,025 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:07:08,127 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:07:08,127 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:07:08,345 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:07:08,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550856060] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:07:08,346 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:07:08,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 22 [2024-11-28 02:07:08,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384735777] [2024-11-28 02:07:08,346 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:07:08,346 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-28 02:07:08,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:07:08,347 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-28 02:07:08,347 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=395, Unknown=0, NotChecked=0, Total=506 [2024-11-28 02:07:08,386 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2024-11-28 02:07:08,386 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 100 transitions, 1854 flow. Second operand has 23 states, 23 states have (on average 7.086956521739131) internal successors, (163), 23 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:07:08,387 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:07:08,387 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2024-11-28 02:07:08,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:07:10,097 INFO L124 PetriNetUnfolderBase]: 1426/2650 cut-off events. [2024-11-28 02:07:10,097 INFO L125 PetriNetUnfolderBase]: For 187471/187477 co-relation queries the response was YES. [2024-11-28 02:07:10,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21519 conditions, 2650 events. 1426/2650 cut-off events. For 187471/187477 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 13526 event pairs, 40 based on Foata normal form. 60/2709 useless extension candidates. Maximal degree in co-relation 21446. Up to 558 conditions per place. [2024-11-28 02:07:10,126 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 114 selfloop transitions, 98 changer transitions 91/306 dead transitions. [2024-11-28 02:07:10,126 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 306 transitions, 6134 flow [2024-11-28 02:07:10,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-11-28 02:07:10,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2024-11-28 02:07:10,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 417 transitions. [2024-11-28 02:07:10,129 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5110294117647058 [2024-11-28 02:07:10,129 INFO L175 Difference]: Start difference. First operand has 154 places, 100 transitions, 1854 flow. Second operand 34 states and 417 transitions. [2024-11-28 02:07:10,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 306 transitions, 6134 flow [2024-11-28 02:07:10,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 306 transitions, 5138 flow, removed 468 selfloop flow, removed 19 redundant places. [2024-11-28 02:07:10,406 INFO L231 Difference]: Finished difference. Result has 177 places, 122 transitions, 2420 flow [2024-11-28 02:07:10,406 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=1392, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=2420, PETRI_PLACES=177, PETRI_TRANSITIONS=122} [2024-11-28 02:07:10,407 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 151 predicate places. [2024-11-28 02:07:10,407 INFO L471 AbstractCegarLoop]: Abstraction has has 177 places, 122 transitions, 2420 flow [2024-11-28 02:07:10,407 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 7.086956521739131) internal successors, (163), 23 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:07:10,407 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:07:10,407 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:07:10,417 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f83061d-588f-48b8-a330-a3fb5e354036/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-28 02:07:10,611 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f83061d-588f-48b8-a330-a3fb5e354036/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:07:10,612 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 02:07:10,612 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:07:10,613 INFO L85 PathProgramCache]: Analyzing trace with hash -1191553107, now seen corresponding path program 4 times [2024-11-28 02:07:10,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:07:10,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060860641] [2024-11-28 02:07:10,613 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 02:07:10,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:07:10,635 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 02:07:10,635 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:07:11,050 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:07:11,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:07:11,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060860641] [2024-11-28 02:07:11,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060860641] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:07:11,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389076011] [2024-11-28 02:07:11,050 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 02:07:11,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:07:11,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f83061d-588f-48b8-a330-a3fb5e354036/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:07:11,054 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f83061d-588f-48b8-a330-a3fb5e354036/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:07:11,057 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f83061d-588f-48b8-a330-a3fb5e354036/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-28 02:07:11,120 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 02:07:11,120 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:07:11,122 INFO L256 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-28 02:07:11,123 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:07:11,253 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:07:11,254 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:07:11,455 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:07:11,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389076011] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:07:11,455 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:07:11,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 14 [2024-11-28 02:07:11,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733493535] [2024-11-28 02:07:11,456 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:07:11,456 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-28 02:07:11,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:07:11,457 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-28 02:07:11,457 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2024-11-28 02:07:11,489 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2024-11-28 02:07:11,489 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 122 transitions, 2420 flow. Second operand has 15 states, 15 states have (on average 6.866666666666666) internal successors, (103), 15 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 02:07:11,489 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:07:11,489 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2024-11-28 02:07:11,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:07:12,595 INFO L124 PetriNetUnfolderBase]: 1408/2676 cut-off events. [2024-11-28 02:07:12,596 INFO L125 PetriNetUnfolderBase]: For 207785/207791 co-relation queries the response was YES. [2024-11-28 02:07:12,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21194 conditions, 2676 events. 1408/2676 cut-off events. For 207785/207791 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 14214 event pairs, 477 based on Foata normal form. 33/2706 useless extension candidates. Maximal degree in co-relation 21115. Up to 1645 conditions per place. [2024-11-28 02:07:12,655 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 134 selfloop transitions, 36 changer transitions 47/220 dead transitions. [2024-11-28 02:07:12,659 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 220 transitions, 4638 flow [2024-11-28 02:07:12,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-28 02:07:12,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-11-28 02:07:12,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 225 transitions. [2024-11-28 02:07:12,661 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4934210526315789 [2024-11-28 02:07:12,661 INFO L175 Difference]: Start difference. First operand has 177 places, 122 transitions, 2420 flow. Second operand 19 states and 225 transitions. [2024-11-28 02:07:12,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 220 transitions, 4638 flow [2024-11-28 02:07:12,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 220 transitions, 3635 flow, removed 462 selfloop flow, removed 25 redundant places. [2024-11-28 02:07:12,904 INFO L231 Difference]: Finished difference. Result has 169 places, 126 transitions, 2061 flow [2024-11-28 02:07:12,904 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=1811, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=2061, PETRI_PLACES=169, PETRI_TRANSITIONS=126} [2024-11-28 02:07:12,905 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 143 predicate places. [2024-11-28 02:07:12,905 INFO L471 AbstractCegarLoop]: Abstraction has has 169 places, 126 transitions, 2061 flow [2024-11-28 02:07:12,905 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.866666666666666) internal successors, (103), 15 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 02:07:12,905 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:07:12,905 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:07:12,911 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f83061d-588f-48b8-a330-a3fb5e354036/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-28 02:07:13,105 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f83061d-588f-48b8-a330-a3fb5e354036/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:07:13,106 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 02:07:13,107 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:07:13,107 INFO L85 PathProgramCache]: Analyzing trace with hash -1713159705, now seen corresponding path program 5 times [2024-11-28 02:07:13,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:07:13,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210060528] [2024-11-28 02:07:13,107 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 02:07:13,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:07:13,119 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-11-28 02:07:13,119 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:07:13,440 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:07:13,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:07:13,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210060528] [2024-11-28 02:07:13,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210060528] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:07:13,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252272802] [2024-11-28 02:07:13,441 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 02:07:13,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:07:13,441 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f83061d-588f-48b8-a330-a3fb5e354036/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:07:13,443 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f83061d-588f-48b8-a330-a3fb5e354036/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:07:13,446 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f83061d-588f-48b8-a330-a3fb5e354036/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-28 02:07:13,504 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-11-28 02:07:13,505 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:07:13,506 INFO L256 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-28 02:07:13,507 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:07:13,634 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:07:13,634 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:07:13,810 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:07:13,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252272802] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:07:13,811 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:07:13,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 15 [2024-11-28 02:07:13,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126855611] [2024-11-28 02:07:13,811 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:07:13,812 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-28 02:07:13,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:07:13,813 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-28 02:07:13,813 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2024-11-28 02:07:13,841 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2024-11-28 02:07:13,841 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 126 transitions, 2061 flow. Second operand has 16 states, 16 states have (on average 6.9375) internal successors, (111), 16 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 02:07:13,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:07:13,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2024-11-28 02:07:13,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:07:14,964 INFO L124 PetriNetUnfolderBase]: 1570/3051 cut-off events. [2024-11-28 02:07:14,964 INFO L125 PetriNetUnfolderBase]: For 162098/162104 co-relation queries the response was YES. [2024-11-28 02:07:14,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20842 conditions, 3051 events. 1570/3051 cut-off events. For 162098/162104 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 17076 event pairs, 396 based on Foata normal form. 33/3083 useless extension candidates. Maximal degree in co-relation 20772. Up to 1489 conditions per place. [2024-11-28 02:07:14,999 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 135 selfloop transitions, 62 changer transitions 53/253 dead transitions. [2024-11-28 02:07:14,999 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 253 transitions, 4428 flow [2024-11-28 02:07:14,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-28 02:07:15,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-11-28 02:07:15,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 261 transitions. [2024-11-28 02:07:15,001 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4943181818181818 [2024-11-28 02:07:15,001 INFO L175 Difference]: Start difference. First operand has 169 places, 126 transitions, 2061 flow. Second operand 22 states and 261 transitions. [2024-11-28 02:07:15,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 253 transitions, 4428 flow [2024-11-28 02:07:15,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 253 transitions, 4236 flow, removed 72 selfloop flow, removed 12 redundant places. [2024-11-28 02:07:15,321 INFO L231 Difference]: Finished difference. Result has 187 places, 145 transitions, 2612 flow [2024-11-28 02:07:15,321 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=1915, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=2612, PETRI_PLACES=187, PETRI_TRANSITIONS=145} [2024-11-28 02:07:15,322 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 161 predicate places. [2024-11-28 02:07:15,322 INFO L471 AbstractCegarLoop]: Abstraction has has 187 places, 145 transitions, 2612 flow [2024-11-28 02:07:15,322 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 6.9375) internal successors, (111), 16 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 02:07:15,322 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:07:15,322 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:07:15,332 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f83061d-588f-48b8-a330-a3fb5e354036/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-28 02:07:15,522 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f83061d-588f-48b8-a330-a3fb5e354036/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:07:15,523 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 02:07:15,523 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:07:15,523 INFO L85 PathProgramCache]: Analyzing trace with hash 2096917903, now seen corresponding path program 6 times [2024-11-28 02:07:15,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:07:15,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287740107] [2024-11-28 02:07:15,523 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 02:07:15,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:07:15,538 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-11-28 02:07:15,538 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:07:15,801 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:07:15,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:07:15,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287740107] [2024-11-28 02:07:15,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287740107] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:07:15,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773028825] [2024-11-28 02:07:15,801 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 02:07:15,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:07:15,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f83061d-588f-48b8-a330-a3fb5e354036/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:07:15,803 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f83061d-588f-48b8-a330-a3fb5e354036/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:07:15,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f83061d-588f-48b8-a330-a3fb5e354036/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-28 02:07:15,864 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-11-28 02:07:15,864 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:07:15,865 INFO L256 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-28 02:07:15,866 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:07:15,965 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:07:15,965 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:07:16,113 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:07:16,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773028825] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:07:16,114 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:07:16,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 14 [2024-11-28 02:07:16,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523599442] [2024-11-28 02:07:16,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:07:16,114 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-28 02:07:16,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:07:16,115 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-28 02:07:16,115 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2024-11-28 02:07:16,158 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2024-11-28 02:07:16,159 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 145 transitions, 2612 flow. Second operand has 15 states, 15 states have (on average 6.866666666666666) internal successors, (103), 15 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 02:07:16,159 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:07:16,160 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2024-11-28 02:07:16,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:07:17,073 INFO L124 PetriNetUnfolderBase]: 1624/3177 cut-off events. [2024-11-28 02:07:17,073 INFO L125 PetriNetUnfolderBase]: For 188940/188946 co-relation queries the response was YES. [2024-11-28 02:07:17,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22672 conditions, 3177 events. 1624/3177 cut-off events. For 188940/188946 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 17992 event pairs, 327 based on Foata normal form. 33/3207 useless extension candidates. Maximal degree in co-relation 22593. Up to 1171 conditions per place. [2024-11-28 02:07:17,102 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 119 selfloop transitions, 83 changer transitions 51/256 dead transitions. [2024-11-28 02:07:17,102 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 256 transitions, 4862 flow [2024-11-28 02:07:17,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-28 02:07:17,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-11-28 02:07:17,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 250 transitions. [2024-11-28 02:07:17,104 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.49603174603174605 [2024-11-28 02:07:17,104 INFO L175 Difference]: Start difference. First operand has 187 places, 145 transitions, 2612 flow. Second operand 21 states and 250 transitions. [2024-11-28 02:07:17,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 256 transitions, 4862 flow [2024-11-28 02:07:17,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 256 transitions, 4584 flow, removed 117 selfloop flow, removed 11 redundant places. [2024-11-28 02:07:17,539 INFO L231 Difference]: Finished difference. Result has 200 places, 151 transitions, 2856 flow [2024-11-28 02:07:17,539 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=2408, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2856, PETRI_PLACES=200, PETRI_TRANSITIONS=151} [2024-11-28 02:07:17,540 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 174 predicate places. [2024-11-28 02:07:17,540 INFO L471 AbstractCegarLoop]: Abstraction has has 200 places, 151 transitions, 2856 flow [2024-11-28 02:07:17,540 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.866666666666666) internal successors, (103), 15 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 02:07:17,540 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:07:17,540 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:07:17,556 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f83061d-588f-48b8-a330-a3fb5e354036/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-28 02:07:17,744 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f83061d-588f-48b8-a330-a3fb5e354036/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:07:17,745 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 02:07:17,745 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:07:17,745 INFO L85 PathProgramCache]: Analyzing trace with hash 175416823, now seen corresponding path program 7 times [2024-11-28 02:07:17,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:07:17,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185525906] [2024-11-28 02:07:17,745 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 02:07:17,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:07:17,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:07:17,997 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:07:17,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:07:17,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185525906] [2024-11-28 02:07:17,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185525906] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:07:17,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51488680] [2024-11-28 02:07:17,997 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 02:07:17,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:07:17,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f83061d-588f-48b8-a330-a3fb5e354036/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:07:17,999 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f83061d-588f-48b8-a330-a3fb5e354036/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:07:18,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f83061d-588f-48b8-a330-a3fb5e354036/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-28 02:07:18,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:07:18,069 INFO L256 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-28 02:07:18,072 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:07:18,188 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:07:18,189 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:07:18,332 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:07:18,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51488680] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:07:18,333 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:07:18,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 15 [2024-11-28 02:07:18,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130006787] [2024-11-28 02:07:18,333 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:07:18,333 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-28 02:07:18,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:07:18,334 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-28 02:07:18,334 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2024-11-28 02:07:18,386 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2024-11-28 02:07:18,386 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 151 transitions, 2856 flow. Second operand has 16 states, 16 states have (on average 6.9375) internal successors, (111), 16 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 02:07:18,386 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:07:18,386 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2024-11-28 02:07:18,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:07:19,742 INFO L124 PetriNetUnfolderBase]: 1750/3465 cut-off events. [2024-11-28 02:07:19,743 INFO L125 PetriNetUnfolderBase]: For 215015/215021 co-relation queries the response was YES. [2024-11-28 02:07:19,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25184 conditions, 3465 events. 1750/3465 cut-off events. For 215015/215021 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 20369 event pairs, 258 based on Foata normal form. 33/3497 useless extension candidates. Maximal degree in co-relation 25101. Up to 1033 conditions per place. [2024-11-28 02:07:19,766 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 122 selfloop transitions, 104 changer transitions 57/286 dead transitions. [2024-11-28 02:07:19,766 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 286 transitions, 5504 flow [2024-11-28 02:07:19,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-28 02:07:19,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-11-28 02:07:19,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 287 transitions. [2024-11-28 02:07:19,769 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4982638888888889 [2024-11-28 02:07:19,770 INFO L175 Difference]: Start difference. First operand has 200 places, 151 transitions, 2856 flow. Second operand 24 states and 287 transitions. [2024-11-28 02:07:19,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 286 transitions, 5504 flow [2024-11-28 02:07:20,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 286 transitions, 5144 flow, removed 138 selfloop flow, removed 13 redundant places. [2024-11-28 02:07:20,243 INFO L231 Difference]: Finished difference. Result has 217 places, 166 transitions, 3409 flow [2024-11-28 02:07:20,243 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=2646, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=3409, PETRI_PLACES=217, PETRI_TRANSITIONS=166} [2024-11-28 02:07:20,243 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 191 predicate places. [2024-11-28 02:07:20,244 INFO L471 AbstractCegarLoop]: Abstraction has has 217 places, 166 transitions, 3409 flow [2024-11-28 02:07:20,244 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 6.9375) internal successors, (111), 16 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 02:07:20,244 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:07:20,244 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:07:20,249 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f83061d-588f-48b8-a330-a3fb5e354036/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-28 02:07:20,444 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f83061d-588f-48b8-a330-a3fb5e354036/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-28 02:07:20,444 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 02:07:20,445 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:07:20,445 INFO L85 PathProgramCache]: Analyzing trace with hash 1254822935, now seen corresponding path program 8 times [2024-11-28 02:07:20,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:07:20,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579480423] [2024-11-28 02:07:20,445 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:07:20,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:07:20,457 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:07:20,457 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:07:20,677 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:07:20,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:07:20,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579480423] [2024-11-28 02:07:20,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579480423] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:07:20,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135498656] [2024-11-28 02:07:20,677 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:07:20,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:07:20,678 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f83061d-588f-48b8-a330-a3fb5e354036/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:07:20,679 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f83061d-588f-48b8-a330-a3fb5e354036/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:07:20,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f83061d-588f-48b8-a330-a3fb5e354036/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-28 02:07:20,740 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:07:20,740 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:07:20,742 INFO L256 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-28 02:07:20,743 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:07:20,826 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:07:20,826 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:07:21,133 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:07:21,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135498656] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:07:21,133 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:07:21,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 14 [2024-11-28 02:07:21,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048487731] [2024-11-28 02:07:21,134 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:07:21,134 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-28 02:07:21,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:07:21,134 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-28 02:07:21,135 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2024-11-28 02:07:21,183 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2024-11-28 02:07:21,183 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 166 transitions, 3409 flow. Second operand has 15 states, 15 states have (on average 6.866666666666666) internal successors, (103), 15 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 02:07:21,183 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:07:21,183 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2024-11-28 02:07:21,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:07:22,413 INFO L124 PetriNetUnfolderBase]: 1840/3672 cut-off events. [2024-11-28 02:07:22,413 INFO L125 PetriNetUnfolderBase]: For 231043/231049 co-relation queries the response was YES. [2024-11-28 02:07:22,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27065 conditions, 3672 events. 1840/3672 cut-off events. For 231043/231049 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 22147 event pairs, 237 based on Foata normal form. 33/3702 useless extension candidates. Maximal degree in co-relation 26975. Up to 859 conditions per place. [2024-11-28 02:07:22,450 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 115 selfloop transitions, 121 changer transitions 55/294 dead transitions. [2024-11-28 02:07:22,450 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 294 transitions, 6067 flow [2024-11-28 02:07:22,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-28 02:07:22,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-11-28 02:07:22,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 276 transitions. [2024-11-28 02:07:22,453 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-11-28 02:07:22,453 INFO L175 Difference]: Start difference. First operand has 217 places, 166 transitions, 3409 flow. Second operand 23 states and 276 transitions. [2024-11-28 02:07:22,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 294 transitions, 6067 flow [2024-11-28 02:07:22,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 294 transitions, 5693 flow, removed 132 selfloop flow, removed 16 redundant places. [2024-11-28 02:07:22,987 INFO L231 Difference]: Finished difference. Result has 229 places, 177 transitions, 3875 flow [2024-11-28 02:07:22,987 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=3123, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=3875, PETRI_PLACES=229, PETRI_TRANSITIONS=177} [2024-11-28 02:07:22,987 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 203 predicate places. [2024-11-28 02:07:22,988 INFO L471 AbstractCegarLoop]: Abstraction has has 229 places, 177 transitions, 3875 flow [2024-11-28 02:07:22,988 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.866666666666666) internal successors, (103), 15 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 02:07:22,988 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:07:22,988 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:07:22,994 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f83061d-588f-48b8-a330-a3fb5e354036/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-28 02:07:23,188 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f83061d-588f-48b8-a330-a3fb5e354036/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-28 02:07:23,189 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 02:07:23,189 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:07:23,189 INFO L85 PathProgramCache]: Analyzing trace with hash 1119426845, now seen corresponding path program 9 times [2024-11-28 02:07:23,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:07:23,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375071616] [2024-11-28 02:07:23,190 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 02:07:23,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:07:23,204 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-28 02:07:23,205 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:07:23,456 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:07:23,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:07:23,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375071616] [2024-11-28 02:07:23,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375071616] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:07:23,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27820786] [2024-11-28 02:07:23,457 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 02:07:23,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:07:23,457 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f83061d-588f-48b8-a330-a3fb5e354036/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:07:23,459 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f83061d-588f-48b8-a330-a3fb5e354036/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:07:23,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f83061d-588f-48b8-a330-a3fb5e354036/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-28 02:07:23,521 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-28 02:07:23,521 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:07:23,522 INFO L256 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-28 02:07:23,524 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:07:23,618 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:07:23,618 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:07:23,754 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:07:23,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27820786] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:07:23,754 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:07:23,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 15 [2024-11-28 02:07:23,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818795014] [2024-11-28 02:07:23,755 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:07:23,755 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-28 02:07:23,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:07:23,756 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-28 02:07:23,756 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2024-11-28 02:07:23,800 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2024-11-28 02:07:23,800 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 177 transitions, 3875 flow. Second operand has 16 states, 16 states have (on average 6.9375) internal successors, (111), 16 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 02:07:23,800 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:07:23,800 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2024-11-28 02:07:23,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:07:25,063 INFO L124 PetriNetUnfolderBase]: 1930/3876 cut-off events. [2024-11-28 02:07:25,064 INFO L125 PetriNetUnfolderBase]: For 261665/261671 co-relation queries the response was YES. [2024-11-28 02:07:25,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29354 conditions, 3876 events. 1930/3876 cut-off events. For 261665/261671 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 23854 event pairs, 174 based on Foata normal form. 33/3908 useless extension candidates. Maximal degree in co-relation 29258. Up to 888 conditions per place. [2024-11-28 02:07:25,089 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 118 selfloop transitions, 138 changer transitions 61/320 dead transitions. [2024-11-28 02:07:25,089 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 320 transitions, 6735 flow [2024-11-28 02:07:25,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-28 02:07:25,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-11-28 02:07:25,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 313 transitions. [2024-11-28 02:07:25,091 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5016025641025641 [2024-11-28 02:07:25,091 INFO L175 Difference]: Start difference. First operand has 229 places, 177 transitions, 3875 flow. Second operand 26 states and 313 transitions. [2024-11-28 02:07:25,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 320 transitions, 6735 flow [2024-11-28 02:07:25,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 320 transitions, 6261 flow, removed 168 selfloop flow, removed 16 redundant places. [2024-11-28 02:07:25,540 INFO L231 Difference]: Finished difference. Result has 243 places, 188 transitions, 4314 flow [2024-11-28 02:07:25,540 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=3537, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=4314, PETRI_PLACES=243, PETRI_TRANSITIONS=188} [2024-11-28 02:07:25,540 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 217 predicate places. [2024-11-28 02:07:25,540 INFO L471 AbstractCegarLoop]: Abstraction has has 243 places, 188 transitions, 4314 flow [2024-11-28 02:07:25,541 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 6.9375) internal successors, (111), 16 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 02:07:25,541 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:07:25,541 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:07:25,546 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f83061d-588f-48b8-a330-a3fb5e354036/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-28 02:07:25,741 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f83061d-588f-48b8-a330-a3fb5e354036/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-28 02:07:25,741 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 02:07:25,742 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:07:25,742 INFO L85 PathProgramCache]: Analyzing trace with hash 425840181, now seen corresponding path program 10 times [2024-11-28 02:07:25,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:07:25,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385089016] [2024-11-28 02:07:25,742 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 02:07:25,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:07:25,751 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 02:07:25,751 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:07:26,117 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:07:26,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:07:26,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385089016] [2024-11-28 02:07:26,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385089016] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:07:26,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298152778] [2024-11-28 02:07:26,118 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 02:07:26,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:07:26,118 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f83061d-588f-48b8-a330-a3fb5e354036/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:07:26,120 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f83061d-588f-48b8-a330-a3fb5e354036/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:07:26,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f83061d-588f-48b8-a330-a3fb5e354036/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-28 02:07:26,179 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 02:07:26,180 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:07:26,181 INFO L256 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-28 02:07:26,183 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:07:26,262 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:07:26,262 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:07:26,386 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:07:26,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [298152778] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:07:26,386 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:07:26,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 14 [2024-11-28 02:07:26,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045710398] [2024-11-28 02:07:26,386 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:07:26,387 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-28 02:07:26,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:07:26,387 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-28 02:07:26,387 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2024-11-28 02:07:26,417 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2024-11-28 02:07:26,418 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 188 transitions, 4314 flow. Second operand has 15 states, 15 states have (on average 6.866666666666666) internal successors, (103), 15 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 02:07:26,418 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:07:26,418 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2024-11-28 02:07:26,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:07:27,554 INFO L124 PetriNetUnfolderBase]: 2002/4038 cut-off events. [2024-11-28 02:07:27,554 INFO L125 PetriNetUnfolderBase]: For 283050/283056 co-relation queries the response was YES. [2024-11-28 02:07:27,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31107 conditions, 4038 events. 2002/4038 cut-off events. For 283050/283056 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 25207 event pairs, 153 based on Foata normal form. 33/4068 useless extension candidates. Maximal degree in co-relation 31006. Up to 924 conditions per place. [2024-11-28 02:07:27,597 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 114 selfloop transitions, 150 changer transitions 59/326 dead transitions. [2024-11-28 02:07:27,598 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 326 transitions, 7218 flow [2024-11-28 02:07:27,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-28 02:07:27,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-11-28 02:07:27,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 302 transitions. [2024-11-28 02:07:27,599 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5033333333333333 [2024-11-28 02:07:27,599 INFO L175 Difference]: Start difference. First operand has 243 places, 188 transitions, 4314 flow. Second operand 25 states and 302 transitions. [2024-11-28 02:07:27,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 326 transitions, 7218 flow [2024-11-28 02:07:28,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 326 transitions, 6694 flow, removed 173 selfloop flow, removed 20 redundant places. [2024-11-28 02:07:28,121 INFO L231 Difference]: Finished difference. Result has 251 places, 197 transitions, 4663 flow [2024-11-28 02:07:28,121 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=3922, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=4663, PETRI_PLACES=251, PETRI_TRANSITIONS=197} [2024-11-28 02:07:28,122 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 225 predicate places. [2024-11-28 02:07:28,122 INFO L471 AbstractCegarLoop]: Abstraction has has 251 places, 197 transitions, 4663 flow [2024-11-28 02:07:28,122 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.866666666666666) internal successors, (103), 15 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 02:07:28,122 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:07:28,122 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:07:28,128 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f83061d-588f-48b8-a330-a3fb5e354036/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-28 02:07:28,322 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f83061d-588f-48b8-a330-a3fb5e354036/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-28 02:07:28,323 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 02:07:28,323 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:07:28,323 INFO L85 PathProgramCache]: Analyzing trace with hash 1641831875, now seen corresponding path program 11 times [2024-11-28 02:07:28,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:07:28,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267954273] [2024-11-28 02:07:28,323 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 02:07:28,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:07:28,331 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-11-28 02:07:28,332 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:07:28,525 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:07:28,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:07:28,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267954273] [2024-11-28 02:07:28,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267954273] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:07:28,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414689098] [2024-11-28 02:07:28,526 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 02:07:28,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:07:28,526 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f83061d-588f-48b8-a330-a3fb5e354036/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:07:28,528 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f83061d-588f-48b8-a330-a3fb5e354036/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:07:28,530 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f83061d-588f-48b8-a330-a3fb5e354036/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-28 02:07:28,588 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-11-28 02:07:28,588 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:07:28,589 INFO L256 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-28 02:07:28,590 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:07:28,674 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:07:28,674 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:07:28,869 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:07:28,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414689098] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:07:28,869 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:07:28,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 15 [2024-11-28 02:07:28,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710234082] [2024-11-28 02:07:28,870 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:07:28,870 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-28 02:07:28,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:07:28,871 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-28 02:07:28,871 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2024-11-28 02:07:28,921 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2024-11-28 02:07:28,922 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 197 transitions, 4663 flow. Second operand has 16 states, 16 states have (on average 6.9375) internal successors, (111), 16 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 02:07:28,922 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:07:28,922 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2024-11-28 02:07:28,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:07:30,274 INFO L124 PetriNetUnfolderBase]: 2101/4245 cut-off events. [2024-11-28 02:07:30,274 INFO L125 PetriNetUnfolderBase]: For 305493/305499 co-relation queries the response was YES. [2024-11-28 02:07:30,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32941 conditions, 4245 events. 2101/4245 cut-off events. For 305493/305499 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 26735 event pairs, 84 based on Foata normal form. 33/4277 useless extension candidates. Maximal degree in co-relation 32836. Up to 966 conditions per place. [2024-11-28 02:07:30,301 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 119 selfloop transitions, 166 changer transitions 63/351 dead transitions. [2024-11-28 02:07:30,301 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 351 transitions, 7718 flow [2024-11-28 02:07:30,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-28 02:07:30,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-11-28 02:07:30,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 339 transitions. [2024-11-28 02:07:30,303 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5044642857142857 [2024-11-28 02:07:30,303 INFO L175 Difference]: Start difference. First operand has 251 places, 197 transitions, 4663 flow. Second operand 28 states and 339 transitions. [2024-11-28 02:07:30,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 351 transitions, 7718 flow [2024-11-28 02:07:30,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 351 transitions, 7156 flow, removed 174 selfloop flow, removed 20 redundant places. [2024-11-28 02:07:30,904 INFO L231 Difference]: Finished difference. Result has 262 places, 207 transitions, 4989 flow [2024-11-28 02:07:30,904 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=4235, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=157, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=4989, PETRI_PLACES=262, PETRI_TRANSITIONS=207} [2024-11-28 02:07:30,905 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 236 predicate places. [2024-11-28 02:07:30,905 INFO L471 AbstractCegarLoop]: Abstraction has has 262 places, 207 transitions, 4989 flow [2024-11-28 02:07:30,905 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 6.9375) internal successors, (111), 16 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 02:07:30,905 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:07:30,905 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:07:30,914 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f83061d-588f-48b8-a330-a3fb5e354036/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-28 02:07:31,106 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f83061d-588f-48b8-a330-a3fb5e354036/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:07:31,106 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 02:07:31,107 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:07:31,107 INFO L85 PathProgramCache]: Analyzing trace with hash 1275361531, now seen corresponding path program 12 times [2024-11-28 02:07:31,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:07:31,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154490890] [2024-11-28 02:07:31,107 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 02:07:31,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:07:31,117 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2024-11-28 02:07:31,117 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:07:31,300 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:07:31,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:07:31,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154490890] [2024-11-28 02:07:31,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154490890] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:07:31,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125776820] [2024-11-28 02:07:31,301 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 02:07:31,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:07:31,301 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f83061d-588f-48b8-a330-a3fb5e354036/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:07:31,303 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f83061d-588f-48b8-a330-a3fb5e354036/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:07:31,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f83061d-588f-48b8-a330-a3fb5e354036/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-28 02:07:31,368 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2024-11-28 02:07:31,368 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:07:31,369 INFO L256 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-28 02:07:31,370 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:07:31,542 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:07:31,542 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:07:31,671 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:07:31,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125776820] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:07:31,671 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:07:31,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 14 [2024-11-28 02:07:31,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005469036] [2024-11-28 02:07:31,672 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:07:31,672 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-28 02:07:31,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:07:31,674 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-28 02:07:31,674 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2024-11-28 02:07:31,700 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2024-11-28 02:07:31,700 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 207 transitions, 4989 flow. Second operand has 15 states, 15 states have (on average 6.866666666666666) internal successors, (103), 15 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 02:07:31,700 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:07:31,700 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2024-11-28 02:07:31,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:07:33,157 INFO L124 PetriNetUnfolderBase]: 2272/4566 cut-off events. [2024-11-28 02:07:33,157 INFO L125 PetriNetUnfolderBase]: For 350106/350112 co-relation queries the response was YES. [2024-11-28 02:07:33,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36520 conditions, 4566 events. 2272/4566 cut-off events. For 350106/350112 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 28914 event pairs, 81 based on Foata normal form. 33/4596 useless extension candidates. Maximal degree in co-relation 36411. Up to 1032 conditions per place. [2024-11-28 02:07:33,206 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 128 selfloop transitions, 174 changer transitions 55/360 dead transitions. [2024-11-28 02:07:33,207 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 360 transitions, 8295 flow [2024-11-28 02:07:33,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-28 02:07:33,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-11-28 02:07:33,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 332 transitions. [2024-11-28 02:07:33,209 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5123456790123457 [2024-11-28 02:07:33,209 INFO L175 Difference]: Start difference. First operand has 262 places, 207 transitions, 4989 flow. Second operand 27 states and 332 transitions. [2024-11-28 02:07:33,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 360 transitions, 8295 flow [2024-11-28 02:07:34,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 360 transitions, 7718 flow, removed 189 selfloop flow, removed 21 redundant places. [2024-11-28 02:07:34,043 INFO L231 Difference]: Finished difference. Result has 271 places, 215 transitions, 5398 flow [2024-11-28 02:07:34,043 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=4570, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=166, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=5398, PETRI_PLACES=271, PETRI_TRANSITIONS=215} [2024-11-28 02:07:34,043 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 245 predicate places. [2024-11-28 02:07:34,043 INFO L471 AbstractCegarLoop]: Abstraction has has 271 places, 215 transitions, 5398 flow [2024-11-28 02:07:34,043 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.866666666666666) internal successors, (103), 15 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 02:07:34,043 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:07:34,043 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:07:34,050 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f83061d-588f-48b8-a330-a3fb5e354036/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-28 02:07:34,244 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f83061d-588f-48b8-a330-a3fb5e354036/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:07:34,244 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 02:07:34,245 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:07:34,245 INFO L85 PathProgramCache]: Analyzing trace with hash -704394949, now seen corresponding path program 13 times [2024-11-28 02:07:34,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:07:34,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671321142] [2024-11-28 02:07:34,245 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 02:07:34,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:07:34,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:07:34,454 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:07:34,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:07:34,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671321142] [2024-11-28 02:07:34,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671321142] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:07:34,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140468578] [2024-11-28 02:07:34,455 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 02:07:34,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:07:34,455 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f83061d-588f-48b8-a330-a3fb5e354036/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:07:34,457 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f83061d-588f-48b8-a330-a3fb5e354036/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:07:34,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f83061d-588f-48b8-a330-a3fb5e354036/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-28 02:07:34,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:07:34,520 INFO L256 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-28 02:07:34,521 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:07:34,598 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:07:34,598 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:07:34,721 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:07:34,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140468578] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:07:34,721 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:07:34,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 15 [2024-11-28 02:07:34,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051175752] [2024-11-28 02:07:34,721 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:07:34,722 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-28 02:07:34,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:07:34,722 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-28 02:07:34,722 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2024-11-28 02:07:34,737 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2024-11-28 02:07:34,737 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 215 transitions, 5398 flow. Second operand has 16 states, 16 states have (on average 6.875) internal successors, (110), 16 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 02:07:34,737 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:07:34,738 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2024-11-28 02:07:34,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:07:36,173 INFO L124 PetriNetUnfolderBase]: 2218/4482 cut-off events. [2024-11-28 02:07:36,173 INFO L125 PetriNetUnfolderBase]: For 364456/364462 co-relation queries the response was YES. [2024-11-28 02:07:36,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36415 conditions, 4482 events. 2218/4482 cut-off events. For 364456/364462 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 28459 event pairs, 78 based on Foata normal form. 51/4532 useless extension candidates. Maximal degree in co-relation 36301. Up to 1008 conditions per place. [2024-11-28 02:07:36,216 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 119 selfloop transitions, 177 changer transitions 67/366 dead transitions. [2024-11-28 02:07:36,216 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 366 transitions, 8612 flow [2024-11-28 02:07:36,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-28 02:07:36,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-11-28 02:07:36,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 341 transitions. [2024-11-28 02:07:36,218 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5074404761904762 [2024-11-28 02:07:36,218 INFO L175 Difference]: Start difference. First operand has 271 places, 215 transitions, 5398 flow. Second operand 28 states and 341 transitions. [2024-11-28 02:07:36,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 366 transitions, 8612 flow [2024-11-28 02:07:37,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 366 transitions, 7860 flow, removed 244 selfloop flow, removed 22 redundant places. [2024-11-28 02:07:37,046 INFO L231 Difference]: Finished difference. Result has 278 places, 217 transitions, 5432 flow [2024-11-28 02:07:37,046 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=4888, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=5432, PETRI_PLACES=278, PETRI_TRANSITIONS=217} [2024-11-28 02:07:37,047 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 252 predicate places. [2024-11-28 02:07:37,047 INFO L471 AbstractCegarLoop]: Abstraction has has 278 places, 217 transitions, 5432 flow [2024-11-28 02:07:37,047 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 6.875) internal successors, (110), 16 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 02:07:37,047 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:07:37,047 INFO L206 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:07:37,053 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f83061d-588f-48b8-a330-a3fb5e354036/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-28 02:07:37,248 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f83061d-588f-48b8-a330-a3fb5e354036/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-11-28 02:07:37,248 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 02:07:37,248 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:07:37,249 INFO L85 PathProgramCache]: Analyzing trace with hash -478349844, now seen corresponding path program 14 times [2024-11-28 02:07:37,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:07:37,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677198572] [2024-11-28 02:07:37,249 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:07:37,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:07:37,258 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:07:37,258 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:07:37,328 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 45 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 02:07:37,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:07:37,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677198572] [2024-11-28 02:07:37,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677198572] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:07:37,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345261175] [2024-11-28 02:07:37,329 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:07:37,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:07:37,329 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f83061d-588f-48b8-a330-a3fb5e354036/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:07:37,331 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f83061d-588f-48b8-a330-a3fb5e354036/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:07:37,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f83061d-588f-48b8-a330-a3fb5e354036/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-28 02:07:37,392 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:07:37,392 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:07:37,393 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-28 02:07:37,394 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:07:37,453 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 02:07:37,453 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 02:07:37,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345261175] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:07:37,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-28 02:07:37,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 9 [2024-11-28 02:07:37,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828915359] [2024-11-28 02:07:37,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:07:37,454 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-28 02:07:37,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:07:37,454 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-28 02:07:37,454 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-11-28 02:07:37,458 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 24 [2024-11-28 02:07:37,458 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 217 transitions, 5432 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 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 02:07:37,459 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:07:37,459 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 24 [2024-11-28 02:07:37,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:07:38,864 INFO L124 PetriNetUnfolderBase]: 3094/6666 cut-off events. [2024-11-28 02:07:38,864 INFO L125 PetriNetUnfolderBase]: For 365261/366327 co-relation queries the response was YES. [2024-11-28 02:07:38,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39935 conditions, 6666 events. 3094/6666 cut-off events. For 365261/366327 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 53385 event pairs, 171 based on Foata normal form. 266/6320 useless extension candidates. Maximal degree in co-relation 39827. Up to 1324 conditions per place. [2024-11-28 02:07:38,917 INFO L140 encePairwiseOnDemand]: 20/24 looper letters, 0 selfloop transitions, 0 changer transitions 235/235 dead transitions. [2024-11-28 02:07:38,917 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 235 transitions, 4711 flow [2024-11-28 02:07:38,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 02:07:38,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-28 02:07:38,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-11-28 02:07:38,918 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7395833333333334 [2024-11-28 02:07:38,918 INFO L175 Difference]: Start difference. First operand has 278 places, 217 transitions, 5432 flow. Second operand 8 states and 142 transitions. [2024-11-28 02:07:38,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 235 transitions, 4711 flow [2024-11-28 02:07:39,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 235 transitions, 3973 flow, removed 181 selfloop flow, removed 32 redundant places. [2024-11-28 02:07:39,537 INFO L231 Difference]: Finished difference. Result has 247 places, 0 transitions, 0 flow [2024-11-28 02:07:39,537 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=3741, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=0, PETRI_PLACES=247, PETRI_TRANSITIONS=0} [2024-11-28 02:07:39,537 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 221 predicate places. [2024-11-28 02:07:39,537 INFO L471 AbstractCegarLoop]: Abstraction has has 247 places, 0 transitions, 0 flow [2024-11-28 02:07:39,538 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 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 02:07:39,540 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2024-11-28 02:07:39,541 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2024-11-28 02:07:39,541 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2024-11-28 02:07:39,550 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f83061d-588f-48b8-a330-a3fb5e354036/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-28 02:07:39,741 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f83061d-588f-48b8-a330-a3fb5e354036/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-11-28 02:07:39,742 INFO L422 BasicCegarLoop]: Path program histogram: [14, 3, 2, 2, 1] [2024-11-28 02:07:39,745 INFO L241 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-11-28 02:07:39,745 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2024-11-28 02:07:39,751 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 02:07:39 BasicIcfg [2024-11-28 02:07:39,751 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-11-28 02:07:39,752 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-11-28 02:07:39,752 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-11-28 02:07:39,752 INFO L274 PluginConnector]: Witness Printer initialized [2024-11-28 02:07:39,753 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 02:06:55" (3/4) ... [2024-11-28 02:07:39,755 INFO L146 WitnessPrinter]: Generating witness for correct program [2024-11-28 02:07:39,759 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure t1 [2024-11-28 02:07:39,759 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure t2 [2024-11-28 02:07:39,762 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 28 nodes and edges [2024-11-28 02:07:39,762 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2024-11-28 02:07:39,762 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2024-11-28 02:07:39,763 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2024-11-28 02:07:39,836 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f83061d-588f-48b8-a330-a3fb5e354036/bin/uautomizer-verify-aQ6SnzHsRB/witness.graphml [2024-11-28 02:07:39,837 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f83061d-588f-48b8-a330-a3fb5e354036/bin/uautomizer-verify-aQ6SnzHsRB/witness.yml [2024-11-28 02:07:39,837 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-11-28 02:07:39,839 INFO L158 Benchmark]: Toolchain (without parser) took 45249.44ms. Allocated memory was 117.4MB in the beginning and 1.2GB in the end (delta: 1.1GB). Free memory was 91.4MB in the beginning and 593.6MB in the end (delta: -502.2MB). Peak memory consumption was 629.3MB. Max. memory is 16.1GB. [2024-11-28 02:07:39,839 INFO L158 Benchmark]: CDTParser took 1.28ms. Allocated memory is still 117.4MB. Free memory was 73.2MB in the beginning and 73.0MB in the end (delta: 146.9kB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-28 02:07:39,840 INFO L158 Benchmark]: CACSL2BoogieTranslator took 502.62ms. Allocated memory is still 117.4MB. Free memory was 91.1MB in the beginning and 71.5MB in the end (delta: 19.6MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2024-11-28 02:07:39,840 INFO L158 Benchmark]: Boogie Procedure Inliner took 46.96ms. Allocated memory is still 117.4MB. Free memory was 71.5MB in the beginning and 69.8MB in the end (delta: 1.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-28 02:07:39,841 INFO L158 Benchmark]: Boogie Preprocessor took 47.98ms. Allocated memory is still 117.4MB. Free memory was 69.8MB in the beginning and 68.4MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-28 02:07:39,841 INFO L158 Benchmark]: RCFGBuilder took 531.53ms. Allocated memory is still 117.4MB. Free memory was 68.4MB in the beginning and 52.0MB in the end (delta: 16.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-28 02:07:39,842 INFO L158 Benchmark]: TraceAbstraction took 44027.21ms. Allocated memory was 117.4MB in the beginning and 1.2GB in the end (delta: 1.1GB). Free memory was 51.2MB in the beginning and 598.0MB in the end (delta: -546.8MB). Peak memory consumption was 1.0GB. Max. memory is 16.1GB. [2024-11-28 02:07:39,843 INFO L158 Benchmark]: Witness Printer took 85.33ms. Allocated memory is still 1.2GB. Free memory was 598.0MB in the beginning and 593.6MB in the end (delta: 4.4MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-28 02:07:39,845 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.28ms. Allocated memory is still 117.4MB. Free memory was 73.2MB in the beginning and 73.0MB in the end (delta: 146.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 502.62ms. Allocated memory is still 117.4MB. Free memory was 91.1MB in the beginning and 71.5MB in the end (delta: 19.6MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 46.96ms. Allocated memory is still 117.4MB. Free memory was 71.5MB in the beginning and 69.8MB in the end (delta: 1.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Preprocessor took 47.98ms. Allocated memory is still 117.4MB. Free memory was 69.8MB in the beginning and 68.4MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 531.53ms. Allocated memory is still 117.4MB. Free memory was 68.4MB in the beginning and 52.0MB in the end (delta: 16.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 44027.21ms. Allocated memory was 117.4MB in the beginning and 1.2GB in the end (delta: 1.1GB). Free memory was 51.2MB in the beginning and 598.0MB in the end (delta: -546.8MB). Peak memory consumption was 1.0GB. Max. memory is 16.1GB. * Witness Printer took 85.33ms. Allocated memory is still 1.2GB. Free memory was 598.0MB in the beginning and 593.6MB in the end (delta: 4.4MB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 722]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 34 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 43.9s, OverallIterations: 22, TraceHistogramMax: 6, PathProgramHistogramMax: 14, EmptinessCheckTime: 0.0s, AutomataDifference: 29.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 4972 SdHoareTripleChecker+Valid, 6.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 4941 mSDsluCounter, 238 SdHoareTripleChecker+Invalid, 5.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 231 mSDsCounter, 322 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 6717 IncrementalHoareTripleChecker+Invalid, 7039 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 322 mSolverCounterUnsat, 7 mSDtfsCounter, 6717 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1553 GetRequests, 944 SyntacticMatches, 53 SemanticMatches, 556 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4111 ImplicationChecksByTransitivity, 6.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=5432occurred in iteration=21, InterpolantAutomatonStates: 440, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 9.2s InterpolantComputationTime, 1164 NumberOfCodeBlocks, 1164 NumberOfCodeBlocksAsserted, 90 NumberOfCheckSat, 1612 ConstructedInterpolants, 0 QuantifiedInterpolants, 6879 SizeOfPredicates, 137 NumberOfNonLiveVariables, 1849 ConjunctsInSsa, 219 ConjunctsInUnsatCore, 53 InterpolantComputations, 7 PerfectInterpolantSequences, 105/1121 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available, ConComCheckerStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2024-11-28 02:07:39,866 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f83061d-588f-48b8-a330-a3fb5e354036/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE