./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/bench-exp2x6.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version d790fecc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b56c1c31-9bcd-4d87-a77a-22fd5db8a7ad/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b56c1c31-9bcd-4d87-a77a-22fd5db8a7ad/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_b56c1c31-9bcd-4d87-a77a-22fd5db8a7ad/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b56c1c31-9bcd-4d87-a77a-22fd5db8a7ad/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/bench-exp2x6.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b56c1c31-9bcd-4d87-a77a-22fd5db8a7ad/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_b56c1c31-9bcd-4d87-a77a-22fd5db8a7ad/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 1f93f8af6c620ba8dc44e82cf4c30bbca874545f3e3802e43ba4e1345a3afed4 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-27 19:49:20,100 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-27 19:49:20,199 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b56c1c31-9bcd-4d87-a77a-22fd5db8a7ad/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-27 19:49:20,206 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-27 19:49:20,207 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-27 19:49:20,247 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-27 19:49:20,249 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-27 19:49:20,249 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-27 19:49:20,250 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-27 19:49:20,250 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-27 19:49:20,251 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-27 19:49:20,251 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-27 19:49:20,252 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-27 19:49:20,252 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-27 19:49:20,252 INFO L153 SettingsManager]: * Use SBE=true [2024-11-27 19:49:20,252 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-27 19:49:20,252 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-27 19:49:20,253 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-27 19:49:20,253 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-27 19:49:20,253 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-27 19:49:20,253 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-27 19:49:20,254 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-27 19:49:20,254 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-27 19:49:20,254 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-27 19:49:20,254 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-27 19:49:20,254 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-27 19:49:20,254 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-27 19:49:20,254 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-27 19:49:20,254 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-27 19:49:20,255 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-27 19:49:20,255 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-27 19:49:20,255 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-27 19:49:20,255 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 19:49:20,255 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-27 19:49:20,256 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-27 19:49:20,256 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-27 19:49:20,256 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-27 19:49:20,257 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 19:49:20,257 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-27 19:49:20,257 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-27 19:49:20,257 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-11-27 19:49:20,257 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-27 19:49:20,257 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-27 19:49:20,257 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-27 19:49:20,258 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-27 19:49:20,258 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-27 19:49:20,258 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-27 19:49:20,258 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-27 19:49:20,258 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_b56c1c31-9bcd-4d87-a77a-22fd5db8a7ad/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 -> 1f93f8af6c620ba8dc44e82cf4c30bbca874545f3e3802e43ba4e1345a3afed4 [2024-11-27 19:49:20,563 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-27 19:49:20,575 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-27 19:49:20,578 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-27 19:49:20,579 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-27 19:49:20,580 INFO L274 PluginConnector]: CDTParser initialized [2024-11-27 19:49:20,582 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b56c1c31-9bcd-4d87-a77a-22fd5db8a7ad/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/weaver/bench-exp2x6.wvr.c [2024-11-27 19:49:23,544 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b56c1c31-9bcd-4d87-a77a-22fd5db8a7ad/bin/uautomizer-verify-aQ6SnzHsRB/data/455ad51c4/0f9dc20fd69a47b5a4b21cca4955271b/FLAG6a6b8b0e2 [2024-11-27 19:49:23,819 INFO L384 CDTParser]: Found 1 translation units. [2024-11-27 19:49:23,822 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b56c1c31-9bcd-4d87-a77a-22fd5db8a7ad/sv-benchmarks/c/weaver/bench-exp2x6.wvr.c [2024-11-27 19:49:23,830 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b56c1c31-9bcd-4d87-a77a-22fd5db8a7ad/bin/uautomizer-verify-aQ6SnzHsRB/data/455ad51c4/0f9dc20fd69a47b5a4b21cca4955271b/FLAG6a6b8b0e2 [2024-11-27 19:49:23,854 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b56c1c31-9bcd-4d87-a77a-22fd5db8a7ad/bin/uautomizer-verify-aQ6SnzHsRB/data/455ad51c4/0f9dc20fd69a47b5a4b21cca4955271b [2024-11-27 19:49:23,856 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-27 19:49:23,858 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-27 19:49:23,861 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-27 19:49:23,861 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-27 19:49:23,866 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-27 19:49:23,867 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 07:49:23" (1/1) ... [2024-11-27 19:49:23,870 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29000ac1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:49:23, skipping insertion in model container [2024-11-27 19:49:23,870 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 07:49:23" (1/1) ... [2024-11-27 19:49:23,890 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-27 19:49:24,104 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_b56c1c31-9bcd-4d87-a77a-22fd5db8a7ad/sv-benchmarks/c/weaver/bench-exp2x6.wvr.c[2505,2518] [2024-11-27 19:49:24,109 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-27 19:49:24,122 INFO L200 MainTranslator]: Completed pre-run [2024-11-27 19:49:24,159 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_b56c1c31-9bcd-4d87-a77a-22fd5db8a7ad/sv-benchmarks/c/weaver/bench-exp2x6.wvr.c[2505,2518] [2024-11-27 19:49:24,160 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-27 19:49:24,182 INFO L204 MainTranslator]: Completed translation [2024-11-27 19:49:24,183 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:49:24 WrapperNode [2024-11-27 19:49:24,184 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-27 19:49:24,185 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-27 19:49:24,185 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-27 19:49:24,185 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-27 19:49:24,194 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:49:24" (1/1) ... [2024-11-27 19:49:24,203 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:49:24" (1/1) ... [2024-11-27 19:49:24,229 INFO L138 Inliner]: procedures = 19, calls = 12, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 71 [2024-11-27 19:49:24,230 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-27 19:49:24,230 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-27 19:49:24,231 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-27 19:49:24,231 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-27 19:49:24,246 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:49:24" (1/1) ... [2024-11-27 19:49:24,246 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:49:24" (1/1) ... [2024-11-27 19:49:24,249 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:49:24" (1/1) ... [2024-11-27 19:49:24,277 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]. [2024-11-27 19:49:24,280 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:49:24" (1/1) ... [2024-11-27 19:49:24,281 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:49:24" (1/1) ... [2024-11-27 19:49:24,287 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:49:24" (1/1) ... [2024-11-27 19:49:24,290 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:49:24" (1/1) ... [2024-11-27 19:49:24,298 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:49:24" (1/1) ... [2024-11-27 19:49:24,301 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:49:24" (1/1) ... [2024-11-27 19:49:24,302 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:49:24" (1/1) ... [2024-11-27 19:49:24,307 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-27 19:49:24,308 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-27 19:49:24,308 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-27 19:49:24,308 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-27 19:49:24,313 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:49:24" (1/1) ... [2024-11-27 19:49:24,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 19:49:24,335 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b56c1c31-9bcd-4d87-a77a-22fd5db8a7ad/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:49:24,350 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b56c1c31-9bcd-4d87-a77a-22fd5db8a7ad/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-27 19:49:24,355 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b56c1c31-9bcd-4d87-a77a-22fd5db8a7ad/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-27 19:49:24,385 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-27 19:49:24,386 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-27 19:49:24,386 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-27 19:49:24,386 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-27 19:49:24,386 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-27 19:49:24,386 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-27 19:49:24,386 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-27 19:49:24,386 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2024-11-27 19:49:24,387 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2024-11-27 19:49:24,387 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-27 19:49:24,387 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-27 19:49:24,387 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-27 19:49:24,388 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-27 19:49:24,508 INFO L234 CfgBuilder]: Building ICFG [2024-11-27 19:49:24,510 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-27 19:49:24,852 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-27 19:49:24,852 INFO L283 CfgBuilder]: Performing block encoding [2024-11-27 19:49:25,072 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-27 19:49:25,072 INFO L312 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-27 19:49:25,073 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 07:49:25 BoogieIcfgContainer [2024-11-27 19:49:25,073 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-27 19:49:25,079 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-27 19:49:25,079 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-27 19:49:25,087 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-27 19:49:25,087 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.11 07:49:23" (1/3) ... [2024-11-27 19:49:25,088 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@481e4105 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 07:49:25, skipping insertion in model container [2024-11-27 19:49:25,088 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:49:24" (2/3) ... [2024-11-27 19:49:25,089 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@481e4105 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 07:49:25, skipping insertion in model container [2024-11-27 19:49:25,089 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 07:49:25" (3/3) ... [2024-11-27 19:49:25,092 INFO L128 eAbstractionObserver]: Analyzing ICFG bench-exp2x6.wvr.c [2024-11-27 19:49:25,110 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-27 19:49:25,112 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG bench-exp2x6.wvr.c that has 5 procedures, 29 locations, 1 initial locations, 4 loop locations, and 1 error locations. [2024-11-27 19:49:25,112 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-27 19:49:25,213 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-11-27 19:49:25,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 41 places, 32 transitions, 92 flow [2024-11-27 19:49:25,309 INFO L124 PetriNetUnfolderBase]: 4/28 cut-off events. [2024-11-27 19:49:25,312 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-27 19:49:25,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45 conditions, 28 events. 4/28 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 19 event pairs, 0 based on Foata normal form. 0/23 useless extension candidates. Maximal degree in co-relation 25. Up to 2 conditions per place. [2024-11-27 19:49:25,315 INFO L82 GeneralOperation]: Start removeDead. Operand has 41 places, 32 transitions, 92 flow [2024-11-27 19:49:25,319 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 36 places, 27 transitions, 78 flow [2024-11-27 19:49:25,328 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-27 19:49:25,342 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;@1671b7f4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-27 19:49:25,344 INFO L334 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-11-27 19:49:25,378 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-27 19:49:25,378 INFO L124 PetriNetUnfolderBase]: 4/26 cut-off events. [2024-11-27 19:49:25,378 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-27 19:49:25,378 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 19:49:25,379 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:49:25,380 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-11-27 19:49:25,389 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:49:25,390 INFO L85 PathProgramCache]: Analyzing trace with hash -176963990, now seen corresponding path program 1 times [2024-11-27 19:49:25,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:49:25,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977582203] [2024-11-27 19:49:25,401 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:49:25,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:49:25,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:49:26,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:49:26,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:49:26,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977582203] [2024-11-27 19:49:26,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977582203] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 19:49:26,118 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 19:49:26,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-27 19:49:26,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036406241] [2024-11-27 19:49:26,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 19:49:26,132 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-27 19:49:26,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:49:26,161 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-27 19:49:26,162 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-27 19:49:26,164 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 32 [2024-11-27 19:49:26,166 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 27 transitions, 78 flow. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:49:26,166 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 19:49:26,167 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 32 [2024-11-27 19:49:26,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 19:49:26,663 INFO L124 PetriNetUnfolderBase]: 1367/1732 cut-off events. [2024-11-27 19:49:26,663 INFO L125 PetriNetUnfolderBase]: For 141/141 co-relation queries the response was YES. [2024-11-27 19:49:26,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3611 conditions, 1732 events. 1367/1732 cut-off events. For 141/141 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 5582 event pairs, 123 based on Foata normal form. 1/989 useless extension candidates. Maximal degree in co-relation 3091. Up to 1541 conditions per place. [2024-11-27 19:49:26,681 INFO L140 encePairwiseOnDemand]: 26/32 looper letters, 35 selfloop transitions, 5 changer transitions 1/46 dead transitions. [2024-11-27 19:49:26,681 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 46 transitions, 219 flow [2024-11-27 19:49:26,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-27 19:49:26,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-27 19:49:26,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 69 transitions. [2024-11-27 19:49:26,702 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.71875 [2024-11-27 19:49:26,705 INFO L175 Difference]: Start difference. First operand has 36 places, 27 transitions, 78 flow. Second operand 3 states and 69 transitions. [2024-11-27 19:49:26,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 46 transitions, 219 flow [2024-11-27 19:49:26,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 46 transitions, 189 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-11-27 19:49:26,723 INFO L231 Difference]: Finished difference. Result has 31 places, 31 transitions, 95 flow [2024-11-27 19:49:26,726 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=95, PETRI_PLACES=31, PETRI_TRANSITIONS=31} [2024-11-27 19:49:26,730 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, -5 predicate places. [2024-11-27 19:49:26,731 INFO L471 AbstractCegarLoop]: Abstraction has has 31 places, 31 transitions, 95 flow [2024-11-27 19:49:26,732 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:49:26,732 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 19:49:26,732 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:49:26,732 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-27 19:49:26,733 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-11-27 19:49:26,734 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:49:26,735 INFO L85 PathProgramCache]: Analyzing trace with hash 1565588447, now seen corresponding path program 1 times [2024-11-27 19:49:26,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:49:26,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055844068] [2024-11-27 19:49:26,736 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:49:26,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:49:26,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:49:27,001 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:49:27,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:49:27,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055844068] [2024-11-27 19:49:27,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055844068] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 19:49:27,002 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 19:49:27,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-27 19:49:27,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638014177] [2024-11-27 19:49:27,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 19:49:27,005 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-27 19:49:27,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:49:27,006 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-27 19:49:27,006 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-27 19:49:27,007 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 32 [2024-11-27 19:49:27,007 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 31 transitions, 95 flow. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:49:27,007 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 19:49:27,007 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 32 [2024-11-27 19:49:27,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 19:49:27,535 INFO L124 PetriNetUnfolderBase]: 1593/2038 cut-off events. [2024-11-27 19:49:27,535 INFO L125 PetriNetUnfolderBase]: For 483/483 co-relation queries the response was YES. [2024-11-27 19:49:27,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5072 conditions, 2038 events. 1593/2038 cut-off events. For 483/483 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 7013 event pairs, 113 based on Foata normal form. 34/2060 useless extension candidates. Maximal degree in co-relation 1272. Up to 842 conditions per place. [2024-11-27 19:49:27,562 INFO L140 encePairwiseOnDemand]: 27/32 looper letters, 66 selfloop transitions, 10 changer transitions 0/81 dead transitions. [2024-11-27 19:49:27,563 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 81 transitions, 391 flow [2024-11-27 19:49:27,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-27 19:49:27,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-27 19:49:27,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 115 transitions. [2024-11-27 19:49:27,567 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.71875 [2024-11-27 19:49:27,567 INFO L175 Difference]: Start difference. First operand has 31 places, 31 transitions, 95 flow. Second operand 5 states and 115 transitions. [2024-11-27 19:49:27,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 81 transitions, 391 flow [2024-11-27 19:49:27,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 81 transitions, 383 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-27 19:49:27,571 INFO L231 Difference]: Finished difference. Result has 36 places, 38 transitions, 155 flow [2024-11-27 19:49:27,572 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=155, PETRI_PLACES=36, PETRI_TRANSITIONS=38} [2024-11-27 19:49:27,573 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 0 predicate places. [2024-11-27 19:49:27,574 INFO L471 AbstractCegarLoop]: Abstraction has has 36 places, 38 transitions, 155 flow [2024-11-27 19:49:27,574 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:49:27,574 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 19:49:27,574 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:49:27,574 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-27 19:49:27,575 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-11-27 19:49:27,575 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:49:27,576 INFO L85 PathProgramCache]: Analyzing trace with hash -1366693483, now seen corresponding path program 1 times [2024-11-27 19:49:27,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:49:27,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707095765] [2024-11-27 19:49:27,578 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:49:27,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:49:27,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:49:27,776 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:49:27,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:49:27,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707095765] [2024-11-27 19:49:27,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707095765] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 19:49:27,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139591630] [2024-11-27 19:49:27,777 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:49:27,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:49:27,779 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b56c1c31-9bcd-4d87-a77a-22fd5db8a7ad/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:49:27,783 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b56c1c31-9bcd-4d87-a77a-22fd5db8a7ad/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:49:27,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b56c1c31-9bcd-4d87-a77a-22fd5db8a7ad/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-27 19:49:27,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:49:27,889 INFO L256 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-27 19:49:27,898 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:49:28,150 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:49:28,150 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 19:49:28,269 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:49:28,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139591630] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 19:49:28,269 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 19:49:28,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2024-11-27 19:49:28,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182014476] [2024-11-27 19:49:28,270 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 19:49:28,271 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-27 19:49:28,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:49:28,273 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-27 19:49:28,273 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-27 19:49:28,273 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 32 [2024-11-27 19:49:28,274 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 38 transitions, 155 flow. Second operand has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:49:28,275 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 19:49:28,275 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 32 [2024-11-27 19:49:28,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 19:49:28,854 INFO L124 PetriNetUnfolderBase]: 1921/2548 cut-off events. [2024-11-27 19:49:28,854 INFO L125 PetriNetUnfolderBase]: For 3334/3334 co-relation queries the response was YES. [2024-11-27 19:49:28,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7919 conditions, 2548 events. 1921/2548 cut-off events. For 3334/3334 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 10088 event pairs, 274 based on Foata normal form. 64/2540 useless extension candidates. Maximal degree in co-relation 2667. Up to 1063 conditions per place. [2024-11-27 19:49:28,875 INFO L140 encePairwiseOnDemand]: 27/32 looper letters, 79 selfloop transitions, 8 changer transitions 0/92 dead transitions. [2024-11-27 19:49:28,875 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 92 transitions, 571 flow [2024-11-27 19:49:28,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-27 19:49:28,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-27 19:49:28,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 108 transitions. [2024-11-27 19:49:28,879 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.675 [2024-11-27 19:49:28,879 INFO L175 Difference]: Start difference. First operand has 36 places, 38 transitions, 155 flow. Second operand 5 states and 108 transitions. [2024-11-27 19:49:28,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 92 transitions, 571 flow [2024-11-27 19:49:28,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 92 transitions, 571 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-27 19:49:28,887 INFO L231 Difference]: Finished difference. Result has 43 places, 43 transitions, 210 flow [2024-11-27 19:49:28,887 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=155, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=210, PETRI_PLACES=43, PETRI_TRANSITIONS=43} [2024-11-27 19:49:28,888 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 7 predicate places. [2024-11-27 19:49:28,888 INFO L471 AbstractCegarLoop]: Abstraction has has 43 places, 43 transitions, 210 flow [2024-11-27 19:49:28,888 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:49:28,888 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 19:49:28,889 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:49:28,900 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b56c1c31-9bcd-4d87-a77a-22fd5db8a7ad/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-27 19:49:29,090 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b56c1c31-9bcd-4d87-a77a-22fd5db8a7ad/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:49:29,091 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-11-27 19:49:29,092 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:49:29,092 INFO L85 PathProgramCache]: Analyzing trace with hash 670010982, now seen corresponding path program 1 times [2024-11-27 19:49:29,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:49:29,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75392018] [2024-11-27 19:49:29,092 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:49:29,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:49:29,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:49:29,230 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:49:29,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:49:29,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75392018] [2024-11-27 19:49:29,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75392018] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 19:49:29,230 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 19:49:29,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-27 19:49:29,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518440210] [2024-11-27 19:49:29,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 19:49:29,231 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-27 19:49:29,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:49:29,232 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-27 19:49:29,232 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-27 19:49:29,232 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 32 [2024-11-27 19:49:29,232 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 43 transitions, 210 flow. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:49:29,232 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 19:49:29,232 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 32 [2024-11-27 19:49:29,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 19:49:29,692 INFO L124 PetriNetUnfolderBase]: 1873/2470 cut-off events. [2024-11-27 19:49:29,692 INFO L125 PetriNetUnfolderBase]: For 4524/4524 co-relation queries the response was YES. [2024-11-27 19:49:29,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9084 conditions, 2470 events. 1873/2470 cut-off events. For 4524/4524 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 9602 event pairs, 131 based on Foata normal form. 52/2513 useless extension candidates. Maximal degree in co-relation 4687. Up to 1057 conditions per place. [2024-11-27 19:49:29,715 INFO L140 encePairwiseOnDemand]: 27/32 looper letters, 81 selfloop transitions, 8 changer transitions 0/94 dead transitions. [2024-11-27 19:49:29,715 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 94 transitions, 611 flow [2024-11-27 19:49:29,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-27 19:49:29,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-27 19:49:29,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 113 transitions. [2024-11-27 19:49:29,718 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.70625 [2024-11-27 19:49:29,718 INFO L175 Difference]: Start difference. First operand has 43 places, 43 transitions, 210 flow. Second operand 5 states and 113 transitions. [2024-11-27 19:49:29,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 94 transitions, 611 flow [2024-11-27 19:49:29,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 94 transitions, 611 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-27 19:49:29,738 INFO L231 Difference]: Finished difference. Result has 48 places, 42 transitions, 224 flow [2024-11-27 19:49:29,739 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=224, PETRI_PLACES=48, PETRI_TRANSITIONS=42} [2024-11-27 19:49:29,740 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 12 predicate places. [2024-11-27 19:49:29,741 INFO L471 AbstractCegarLoop]: Abstraction has has 48 places, 42 transitions, 224 flow [2024-11-27 19:49:29,741 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:49:29,741 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 19:49:29,741 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:49:29,742 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-27 19:49:29,742 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-11-27 19:49:29,742 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:49:29,743 INFO L85 PathProgramCache]: Analyzing trace with hash 1380676210, now seen corresponding path program 1 times [2024-11-27 19:49:29,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:49:29,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10218604] [2024-11-27 19:49:29,743 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:49:29,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:49:29,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:49:29,888 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:49:29,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:49:29,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10218604] [2024-11-27 19:49:29,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10218604] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 19:49:29,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 19:49:29,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-27 19:49:29,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052480112] [2024-11-27 19:49:29,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 19:49:29,889 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-27 19:49:29,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:49:29,890 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-27 19:49:29,890 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-27 19:49:29,890 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 32 [2024-11-27 19:49:29,891 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 42 transitions, 224 flow. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:49:29,891 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 19:49:29,891 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 32 [2024-11-27 19:49:29,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 19:49:30,304 INFO L124 PetriNetUnfolderBase]: 1836/2452 cut-off events. [2024-11-27 19:49:30,305 INFO L125 PetriNetUnfolderBase]: For 5667/5667 co-relation queries the response was YES. [2024-11-27 19:49:30,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9566 conditions, 2452 events. 1836/2452 cut-off events. For 5667/5667 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 9547 event pairs, 70 based on Foata normal form. 33/2437 useless extension candidates. Maximal degree in co-relation 4858. Up to 1016 conditions per place. [2024-11-27 19:49:30,332 INFO L140 encePairwiseOnDemand]: 27/32 looper letters, 81 selfloop transitions, 10 changer transitions 0/96 dead transitions. [2024-11-27 19:49:30,335 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 96 transitions, 704 flow [2024-11-27 19:49:30,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-27 19:49:30,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-27 19:49:30,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 106 transitions. [2024-11-27 19:49:30,337 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6625 [2024-11-27 19:49:30,337 INFO L175 Difference]: Start difference. First operand has 48 places, 42 transitions, 224 flow. Second operand 5 states and 106 transitions. [2024-11-27 19:49:30,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 96 transitions, 704 flow [2024-11-27 19:49:30,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 96 transitions, 687 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-27 19:49:30,347 INFO L231 Difference]: Finished difference. Result has 52 places, 47 transitions, 280 flow [2024-11-27 19:49:30,347 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=217, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=280, PETRI_PLACES=52, PETRI_TRANSITIONS=47} [2024-11-27 19:49:30,350 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 16 predicate places. [2024-11-27 19:49:30,351 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 47 transitions, 280 flow [2024-11-27 19:49:30,351 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:49:30,351 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 19:49:30,351 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:49:30,351 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-27 19:49:30,352 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-11-27 19:49:30,352 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:49:30,352 INFO L85 PathProgramCache]: Analyzing trace with hash 1695180293, now seen corresponding path program 2 times [2024-11-27 19:49:30,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:49:30,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909013772] [2024-11-27 19:49:30,353 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 19:49:30,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:49:30,382 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 19:49:30,382 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:49:30,500 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:49:30,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:49:30,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909013772] [2024-11-27 19:49:30,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909013772] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 19:49:30,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414812697] [2024-11-27 19:49:30,500 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 19:49:30,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:49:30,501 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b56c1c31-9bcd-4d87-a77a-22fd5db8a7ad/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:49:30,503 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b56c1c31-9bcd-4d87-a77a-22fd5db8a7ad/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:49:30,506 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b56c1c31-9bcd-4d87-a77a-22fd5db8a7ad/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-27 19:49:30,581 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 19:49:30,581 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:49:30,582 INFO L256 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-27 19:49:30,585 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:49:30,734 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:49:30,734 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 19:49:30,808 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:49:30,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414812697] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 19:49:30,809 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 19:49:30,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2024-11-27 19:49:30,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471327469] [2024-11-27 19:49:30,809 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 19:49:30,810 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-27 19:49:30,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:49:30,811 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-27 19:49:30,811 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-27 19:49:30,811 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 32 [2024-11-27 19:49:30,812 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 47 transitions, 280 flow. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:49:30,812 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 19:49:30,813 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 32 [2024-11-27 19:49:30,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 19:49:31,319 INFO L124 PetriNetUnfolderBase]: 1750/2360 cut-off events. [2024-11-27 19:49:31,319 INFO L125 PetriNetUnfolderBase]: For 5888/5888 co-relation queries the response was YES. [2024-11-27 19:49:31,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9789 conditions, 2360 events. 1750/2360 cut-off events. For 5888/5888 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 9815 event pairs, 423 based on Foata normal form. 90/2424 useless extension candidates. Maximal degree in co-relation 4985. Up to 1344 conditions per place. [2024-11-27 19:49:31,341 INFO L140 encePairwiseOnDemand]: 27/32 looper letters, 99 selfloop transitions, 8 changer transitions 0/112 dead transitions. [2024-11-27 19:49:31,342 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 112 transitions, 859 flow [2024-11-27 19:49:31,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-27 19:49:31,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-27 19:49:31,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 114 transitions. [2024-11-27 19:49:31,343 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7125 [2024-11-27 19:49:31,343 INFO L175 Difference]: Start difference. First operand has 52 places, 47 transitions, 280 flow. Second operand 5 states and 114 transitions. [2024-11-27 19:49:31,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 112 transitions, 859 flow [2024-11-27 19:49:31,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 112 transitions, 814 flow, removed 16 selfloop flow, removed 1 redundant places. [2024-11-27 19:49:31,356 INFO L231 Difference]: Finished difference. Result has 57 places, 50 transitions, 315 flow [2024-11-27 19:49:31,357 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=265, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=315, PETRI_PLACES=57, PETRI_TRANSITIONS=50} [2024-11-27 19:49:31,357 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 21 predicate places. [2024-11-27 19:49:31,358 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 50 transitions, 315 flow [2024-11-27 19:49:31,359 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:49:31,359 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 19:49:31,359 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:49:31,370 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b56c1c31-9bcd-4d87-a77a-22fd5db8a7ad/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-27 19:49:31,559 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b56c1c31-9bcd-4d87-a77a-22fd5db8a7ad/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:49:31,560 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-11-27 19:49:31,560 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:49:31,560 INFO L85 PathProgramCache]: Analyzing trace with hash -1721644955, now seen corresponding path program 2 times [2024-11-27 19:49:31,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:49:31,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871732661] [2024-11-27 19:49:31,560 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 19:49:31,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:49:31,584 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 19:49:31,585 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:49:31,693 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:49:31,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:49:31,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871732661] [2024-11-27 19:49:31,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871732661] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 19:49:31,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 19:49:31,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-27 19:49:31,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992530560] [2024-11-27 19:49:31,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 19:49:31,695 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-27 19:49:31,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:49:31,697 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-27 19:49:31,697 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-27 19:49:31,697 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 32 [2024-11-27 19:49:31,698 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 50 transitions, 315 flow. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:49:31,698 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 19:49:31,698 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 32 [2024-11-27 19:49:31,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 19:49:32,069 INFO L124 PetriNetUnfolderBase]: 1577/2122 cut-off events. [2024-11-27 19:49:32,071 INFO L125 PetriNetUnfolderBase]: For 6999/6999 co-relation queries the response was YES. [2024-11-27 19:49:32,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9427 conditions, 2122 events. 1577/2122 cut-off events. For 6999/6999 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 8107 event pairs, 91 based on Foata normal form. 31/2107 useless extension candidates. Maximal degree in co-relation 6427. Up to 864 conditions per place. [2024-11-27 19:49:32,094 INFO L140 encePairwiseOnDemand]: 27/32 looper letters, 88 selfloop transitions, 9 changer transitions 4/106 dead transitions. [2024-11-27 19:49:32,094 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 106 transitions, 881 flow [2024-11-27 19:49:32,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-27 19:49:32,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-27 19:49:32,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 106 transitions. [2024-11-27 19:49:32,097 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6625 [2024-11-27 19:49:32,098 INFO L175 Difference]: Start difference. First operand has 57 places, 50 transitions, 315 flow. Second operand 5 states and 106 transitions. [2024-11-27 19:49:32,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 106 transitions, 881 flow [2024-11-27 19:49:32,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 106 transitions, 856 flow, removed 8 selfloop flow, removed 1 redundant places. [2024-11-27 19:49:32,110 INFO L231 Difference]: Finished difference. Result has 61 places, 49 transitions, 321 flow [2024-11-27 19:49:32,112 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=288, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=321, PETRI_PLACES=61, PETRI_TRANSITIONS=49} [2024-11-27 19:49:32,113 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 25 predicate places. [2024-11-27 19:49:32,113 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 49 transitions, 321 flow [2024-11-27 19:49:32,113 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:49:32,113 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 19:49:32,113 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:49:32,114 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-27 19:49:32,114 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-11-27 19:49:32,114 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:49:32,115 INFO L85 PathProgramCache]: Analyzing trace with hash 376266260, now seen corresponding path program 2 times [2024-11-27 19:49:32,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:49:32,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666665633] [2024-11-27 19:49:32,115 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 19:49:32,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:49:32,143 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 19:49:32,145 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:49:32,259 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:49:32,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:49:32,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666665633] [2024-11-27 19:49:32,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666665633] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 19:49:32,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894304703] [2024-11-27 19:49:32,262 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 19:49:32,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:49:32,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b56c1c31-9bcd-4d87-a77a-22fd5db8a7ad/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:49:32,264 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b56c1c31-9bcd-4d87-a77a-22fd5db8a7ad/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:49:32,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b56c1c31-9bcd-4d87-a77a-22fd5db8a7ad/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-27 19:49:32,351 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 19:49:32,351 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:49:32,353 INFO L256 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-27 19:49:32,355 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:49:32,610 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:49:32,611 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 19:49:32,723 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:49:32,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894304703] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 19:49:32,724 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 19:49:32,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2024-11-27 19:49:32,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618794078] [2024-11-27 19:49:32,724 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 19:49:32,725 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-27 19:49:32,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:49:32,725 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-27 19:49:32,726 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-27 19:49:32,726 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 32 [2024-11-27 19:49:32,727 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 49 transitions, 321 flow. Second operand has 6 states, 6 states have (on average 14.833333333333334) internal successors, (89), 6 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:49:32,727 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 19:49:32,727 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 32 [2024-11-27 19:49:32,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 19:49:33,163 INFO L124 PetriNetUnfolderBase]: 1515/2072 cut-off events. [2024-11-27 19:49:33,163 INFO L125 PetriNetUnfolderBase]: For 7187/7187 co-relation queries the response was YES. [2024-11-27 19:49:33,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9538 conditions, 2072 events. 1515/2072 cut-off events. For 7187/7187 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 8435 event pairs, 258 based on Foata normal form. 62/2076 useless extension candidates. Maximal degree in co-relation 6065. Up to 1124 conditions per place. [2024-11-27 19:49:33,178 INFO L140 encePairwiseOnDemand]: 27/32 looper letters, 91 selfloop transitions, 8 changer transitions 0/104 dead transitions. [2024-11-27 19:49:33,179 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 104 transitions, 881 flow [2024-11-27 19:49:33,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-27 19:49:33,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-27 19:49:33,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 103 transitions. [2024-11-27 19:49:33,180 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.64375 [2024-11-27 19:49:33,180 INFO L175 Difference]: Start difference. First operand has 61 places, 49 transitions, 321 flow. Second operand 5 states and 103 transitions. [2024-11-27 19:49:33,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 104 transitions, 881 flow [2024-11-27 19:49:33,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 104 transitions, 872 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-27 19:49:33,188 INFO L231 Difference]: Finished difference. Result has 66 places, 52 transitions, 362 flow [2024-11-27 19:49:33,188 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=312, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=362, PETRI_PLACES=66, PETRI_TRANSITIONS=52} [2024-11-27 19:49:33,189 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 30 predicate places. [2024-11-27 19:49:33,189 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 52 transitions, 362 flow [2024-11-27 19:49:33,189 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.833333333333334) internal successors, (89), 6 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:49:33,189 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 19:49:33,189 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:49:33,200 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b56c1c31-9bcd-4d87-a77a-22fd5db8a7ad/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-27 19:49:33,394 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b56c1c31-9bcd-4d87-a77a-22fd5db8a7ad/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-11-27 19:49:33,394 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-11-27 19:49:33,395 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:49:33,395 INFO L85 PathProgramCache]: Analyzing trace with hash -1293916122, now seen corresponding path program 2 times [2024-11-27 19:49:33,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:49:33,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815885526] [2024-11-27 19:49:33,395 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 19:49:33,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:49:33,412 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 19:49:33,412 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:49:33,498 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:49:33,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:49:33,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815885526] [2024-11-27 19:49:33,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815885526] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 19:49:33,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943708517] [2024-11-27 19:49:33,498 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 19:49:33,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:49:33,499 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b56c1c31-9bcd-4d87-a77a-22fd5db8a7ad/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:49:33,502 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b56c1c31-9bcd-4d87-a77a-22fd5db8a7ad/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:49:33,505 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b56c1c31-9bcd-4d87-a77a-22fd5db8a7ad/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-27 19:49:33,583 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 19:49:33,583 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:49:33,584 INFO L256 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-27 19:49:33,586 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:49:33,730 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:49:33,730 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 19:49:33,798 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:49:33,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943708517] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 19:49:33,799 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 19:49:33,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2024-11-27 19:49:33,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957517334] [2024-11-27 19:49:33,799 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 19:49:33,799 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-27 19:49:33,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:49:33,800 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-27 19:49:33,800 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-27 19:49:33,800 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 32 [2024-11-27 19:49:33,800 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 52 transitions, 362 flow. Second operand has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:49:33,800 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 19:49:33,800 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 32 [2024-11-27 19:49:33,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 19:49:34,236 INFO L124 PetriNetUnfolderBase]: 1447/1987 cut-off events. [2024-11-27 19:49:34,236 INFO L125 PetriNetUnfolderBase]: For 6906/6906 co-relation queries the response was YES. [2024-11-27 19:49:34,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9767 conditions, 1987 events. 1447/1987 cut-off events. For 6906/6906 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 8177 event pairs, 375 based on Foata normal form. 68/2029 useless extension candidates. Maximal degree in co-relation 8610. Up to 1150 conditions per place. [2024-11-27 19:49:34,255 INFO L140 encePairwiseOnDemand]: 27/32 looper letters, 111 selfloop transitions, 8 changer transitions 0/124 dead transitions. [2024-11-27 19:49:34,255 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 124 transitions, 1092 flow [2024-11-27 19:49:34,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-27 19:49:34,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-27 19:49:34,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 111 transitions. [2024-11-27 19:49:34,256 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.69375 [2024-11-27 19:49:34,256 INFO L175 Difference]: Start difference. First operand has 66 places, 52 transitions, 362 flow. Second operand 5 states and 111 transitions. [2024-11-27 19:49:34,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 124 transitions, 1092 flow [2024-11-27 19:49:34,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 124 transitions, 1034 flow, removed 20 selfloop flow, removed 2 redundant places. [2024-11-27 19:49:34,274 INFO L231 Difference]: Finished difference. Result has 70 places, 55 transitions, 399 flow [2024-11-27 19:49:34,274 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=342, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=399, PETRI_PLACES=70, PETRI_TRANSITIONS=55} [2024-11-27 19:49:34,276 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 34 predicate places. [2024-11-27 19:49:34,276 INFO L471 AbstractCegarLoop]: Abstraction has has 70 places, 55 transitions, 399 flow [2024-11-27 19:49:34,276 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:49:34,276 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 19:49:34,276 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:49:34,287 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b56c1c31-9bcd-4d87-a77a-22fd5db8a7ad/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-27 19:49:34,481 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b56c1c31-9bcd-4d87-a77a-22fd5db8a7ad/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:49:34,482 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-11-27 19:49:34,483 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:49:34,483 INFO L85 PathProgramCache]: Analyzing trace with hash -524044613, now seen corresponding path program 1 times [2024-11-27 19:49:34,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:49:34,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428454229] [2024-11-27 19:49:34,483 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:49:34,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:49:34,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:49:35,346 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:49:35,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:49:35,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428454229] [2024-11-27 19:49:35,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428454229] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 19:49:35,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512808053] [2024-11-27 19:49:35,347 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:49:35,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:49:35,348 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b56c1c31-9bcd-4d87-a77a-22fd5db8a7ad/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:49:35,350 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b56c1c31-9bcd-4d87-a77a-22fd5db8a7ad/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:49:35,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b56c1c31-9bcd-4d87-a77a-22fd5db8a7ad/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-27 19:49:36,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:49:36,087 INFO L256 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-27 19:49:36,090 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:50:57,743 WARN L286 SmtUtils]: Spent 7.29s on a formula simplification. DAG size of input: 34 DAG size of output: 32 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-27 19:51:10,201 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:51:10,202 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 19:51:17,332 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:51:17,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512808053] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 19:51:17,333 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 19:51:17,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 15 [2024-11-27 19:51:17,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227236341] [2024-11-27 19:51:17,333 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 19:51:17,333 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-27 19:51:17,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:51:17,334 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-27 19:51:17,334 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=168, Unknown=9, NotChecked=0, Total=240 [2024-11-27 19:51:17,334 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 32 [2024-11-27 19:51:17,335 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 55 transitions, 399 flow. Second operand has 16 states, 16 states have (on average 12.5) internal successors, (200), 16 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:51:17,335 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 19:51:17,335 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 32 [2024-11-27 19:51:17,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 19:51:30,363 WARN L286 SmtUtils]: Spent 6.28s on a formula simplification. DAG size of input: 51 DAG size of output: 32 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-27 19:51:34,373 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-27 19:51:51,343 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-27 19:51:57,359 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-27 19:52:17,709 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.68s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-27 19:52:19,765 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-27 19:52:21,180 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-27 19:52:25,928 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-27 19:52:29,930 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-27 19:52:43,949 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.63s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-27 19:52:48,198 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-27 19:52:49,435 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-27 19:52:56,757 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-27 19:53:00,762 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-27 19:53:05,129 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-27 19:53:09,132 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-27 19:53:13,134 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-27 19:53:17,137 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-27 19:53:22,276 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-27 19:53:26,281 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-27 19:53:30,285 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-27 19:53:35,033 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.31s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-27 19:53:45,021 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.87s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-27 19:53:46,060 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-27 19:53:57,862 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-27 19:54:04,440 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-27 19:54:06,113 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-27 19:54:10,684 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-27 19:54:14,686 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-27 19:54:18,690 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-27 19:54:22,693 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-27 19:54:26,696 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-27 19:54:30,699 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-27 19:54:33,741 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.04s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-27 19:54:37,060 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.16s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-27 19:54:41,081 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-27 19:54:43,346 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.26s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-27 19:54:47,616 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-27 19:54:52,364 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-27 19:54:54,369 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-27 19:54:58,459 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-27 19:55:02,462 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-27 19:55:04,513 INFO L124 PetriNetUnfolderBase]: 2743/3791 cut-off events. [2024-11-27 19:55:04,513 INFO L125 PetriNetUnfolderBase]: For 13458/13458 co-relation queries the response was YES. [2024-11-27 19:55:04,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18683 conditions, 3791 events. 2743/3791 cut-off events. For 13458/13458 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 17173 event pairs, 281 based on Foata normal form. 5/3774 useless extension candidates. Maximal degree in co-relation 16510. Up to 2054 conditions per place. [2024-11-27 19:55:04,549 INFO L140 encePairwiseOnDemand]: 22/32 looper letters, 209 selfloop transitions, 110 changer transitions 13/337 dead transitions. [2024-11-27 19:55:04,549 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 337 transitions, 2946 flow [2024-11-27 19:55:04,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-27 19:55:04,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-11-27 19:55:04,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 419 transitions. [2024-11-27 19:55:04,555 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6546875 [2024-11-27 19:55:04,555 INFO L175 Difference]: Start difference. First operand has 70 places, 55 transitions, 399 flow. Second operand 20 states and 419 transitions. [2024-11-27 19:55:04,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 337 transitions, 2946 flow [2024-11-27 19:55:04,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 337 transitions, 2851 flow, removed 32 selfloop flow, removed 1 redundant places. [2024-11-27 19:55:04,590 INFO L231 Difference]: Finished difference. Result has 102 places, 163 transitions, 1779 flow [2024-11-27 19:55:04,592 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=386, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1779, PETRI_PLACES=102, PETRI_TRANSITIONS=163} [2024-11-27 19:55:04,593 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 66 predicate places. [2024-11-27 19:55:04,594 INFO L471 AbstractCegarLoop]: Abstraction has has 102 places, 163 transitions, 1779 flow [2024-11-27 19:55:04,594 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 12.5) internal successors, (200), 16 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:55:04,594 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 19:55:04,594 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:55:04,606 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b56c1c31-9bcd-4d87-a77a-22fd5db8a7ad/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-27 19:55:04,795 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b56c1c31-9bcd-4d87-a77a-22fd5db8a7ad/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:55:04,796 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-11-27 19:55:04,796 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:55:04,796 INFO L85 PathProgramCache]: Analyzing trace with hash -467418659, now seen corresponding path program 2 times [2024-11-27 19:55:04,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:55:04,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23711979] [2024-11-27 19:55:04,797 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 19:55:04,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:55:04,842 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 19:55:04,842 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:55:05,280 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:55:05,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:55:05,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23711979] [2024-11-27 19:55:05,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23711979] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 19:55:05,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762524919] [2024-11-27 19:55:05,281 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 19:55:05,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:55:05,281 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b56c1c31-9bcd-4d87-a77a-22fd5db8a7ad/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:55:05,284 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b56c1c31-9bcd-4d87-a77a-22fd5db8a7ad/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:55:05,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b56c1c31-9bcd-4d87-a77a-22fd5db8a7ad/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-27 19:55:05,595 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 19:55:05,595 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:55:05,597 INFO L256 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-27 19:55:05,598 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:55:43,144 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:55:43,144 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 19:55:59,930 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:55:59,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762524919] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 19:55:59,931 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 19:55:59,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 5, 5] total 10 [2024-11-27 19:55:59,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253693321] [2024-11-27 19:55:59,931 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 19:55:59,931 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-27 19:55:59,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:55:59,932 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-27 19:55:59,932 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=73, Unknown=7, NotChecked=0, Total=110 [2024-11-27 19:55:59,932 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 32 [2024-11-27 19:55:59,933 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 163 transitions, 1779 flow. Second operand has 11 states, 11 states have (on average 14.090909090909092) internal successors, (155), 11 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:55:59,933 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 19:55:59,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 32 [2024-11-27 19:55:59,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 19:56:02,161 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-27 19:56:06,606 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-27 19:56:18,885 WARN L286 SmtUtils]: Spent 8.11s on a formula simplification. DAG size of input: 39 DAG size of output: 36 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-27 19:56:20,180 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-27 19:56:35,483 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-27 19:56:39,489 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-27 19:56:43,500 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-27 19:56:50,265 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-27 19:56:54,660 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.21s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-27 19:57:00,554 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-27 19:57:00,614 INFO L124 PetriNetUnfolderBase]: 4264/5884 cut-off events. [2024-11-27 19:57:00,614 INFO L125 PetriNetUnfolderBase]: For 42364/42364 co-relation queries the response was YES. [2024-11-27 19:57:00,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36300 conditions, 5884 events. 4264/5884 cut-off events. For 42364/42364 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 28218 event pairs, 355 based on Foata normal form. 4/5866 useless extension candidates. Maximal degree in co-relation 35758. Up to 3937 conditions per place. [2024-11-27 19:57:00,761 INFO L140 encePairwiseOnDemand]: 24/32 looper letters, 309 selfloop transitions, 117 changer transitions 13/444 dead transitions. [2024-11-27 19:57:00,764 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 444 transitions, 5220 flow [2024-11-27 19:57:00,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-27 19:57:00,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-27 19:57:00,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 370 transitions. [2024-11-27 19:57:00,771 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6801470588235294 [2024-11-27 19:57:00,771 INFO L175 Difference]: Start difference. First operand has 102 places, 163 transitions, 1779 flow. Second operand 17 states and 370 transitions. [2024-11-27 19:57:00,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 444 transitions, 5220 flow [2024-11-27 19:57:01,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 444 transitions, 4983 flow, removed 116 selfloop flow, removed 1 redundant places. [2024-11-27 19:57:01,206 INFO L231 Difference]: Finished difference. Result has 128 places, 277 transitions, 3271 flow [2024-11-27 19:57:01,208 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=1544, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=3271, PETRI_PLACES=128, PETRI_TRANSITIONS=277} [2024-11-27 19:57:01,209 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 92 predicate places. [2024-11-27 19:57:01,209 INFO L471 AbstractCegarLoop]: Abstraction has has 128 places, 277 transitions, 3271 flow [2024-11-27 19:57:01,209 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.090909090909092) internal successors, (155), 11 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:57:01,209 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 19:57:01,209 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:57:01,221 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b56c1c31-9bcd-4d87-a77a-22fd5db8a7ad/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-27 19:57:01,414 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b56c1c31-9bcd-4d87-a77a-22fd5db8a7ad/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:57:01,414 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-11-27 19:57:01,415 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:57:01,415 INFO L85 PathProgramCache]: Analyzing trace with hash 1604912157, now seen corresponding path program 1 times [2024-11-27 19:57:01,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:57:01,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70334706] [2024-11-27 19:57:01,416 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:57:01,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:57:01,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:57:02,111 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:57:02,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:57:02,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70334706] [2024-11-27 19:57:02,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70334706] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 19:57:02,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928813421] [2024-11-27 19:57:02,112 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:57:02,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:57:02,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b56c1c31-9bcd-4d87-a77a-22fd5db8a7ad/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:57:02,114 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b56c1c31-9bcd-4d87-a77a-22fd5db8a7ad/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:57:02,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b56c1c31-9bcd-4d87-a77a-22fd5db8a7ad/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-27 19:57:02,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:57:02,248 INFO L256 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-27 19:57:02,250 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:58:17,706 WARN L286 SmtUtils]: Spent 8.30s on a formula simplification. DAG size of input: 34 DAG size of output: 33 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-27 19:58:49,668 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:58:49,668 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 19:59:03,135 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:59:03,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928813421] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 19:59:03,135 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 19:59:03,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 16 [2024-11-27 19:59:03,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932322923] [2024-11-27 19:59:03,136 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 19:59:03,136 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-27 19:59:03,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:59:03,137 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-27 19:59:03,137 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=189, Unknown=10, NotChecked=0, Total=272 [2024-11-27 19:59:03,137 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 32 [2024-11-27 19:59:03,138 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 277 transitions, 3271 flow. Second operand has 17 states, 17 states have (on average 12.235294117647058) internal successors, (208), 17 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:59:03,138 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 19:59:03,138 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 32 [2024-11-27 19:59:03,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 19:59:27,863 WARN L286 SmtUtils]: Spent 8.82s on a formula simplification. DAG size of input: 51 DAG size of output: 37 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-27 19:59:33,137 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-27 19:59:37,141 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-27 19:59:46,081 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-27 19:59:50,085 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-27 19:59:54,089 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-27 19:59:57,120 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.03s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-27 20:00:01,124 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-27 20:00:05,127 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-27 20:00:09,138 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-27 20:00:13,142 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-27 20:00:17,808 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-27 20:00:21,812 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-27 20:00:23,066 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-27 20:00:27,078 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-27 20:00:31,082 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-27 20:00:40,313 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-27 20:00:44,317 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-27 20:00:56,837 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-27 20:01:00,841 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-27 20:01:04,960 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-27 20:01:08,963 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-27 20:01:11,924 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-27 20:01:16,226 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-27 20:01:20,229 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-27 20:01:24,329 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-27 20:01:29,514 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-27 20:01:34,804 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-27 20:01:38,188 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.01s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-27 20:01:42,367 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-27 20:01:46,371 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-27 20:01:47,548 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-27 20:01:51,764 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-27 20:01:52,987 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-27 20:01:56,989 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-27 20:02:01,538 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-27 20:02:03,716 INFO L124 PetriNetUnfolderBase]: 5924/8197 cut-off events. [2024-11-27 20:02:03,716 INFO L125 PetriNetUnfolderBase]: For 73504/73504 co-relation queries the response was YES. [2024-11-27 20:02:03,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53607 conditions, 8197 events. 5924/8197 cut-off events. For 73504/73504 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 42010 event pairs, 417 based on Foata normal form. 31/8206 useless extension candidates. Maximal degree in co-relation 52981. Up to 6140 conditions per place. [2024-11-27 20:02:03,793 INFO L140 encePairwiseOnDemand]: 22/32 looper letters, 442 selfloop transitions, 104 changer transitions 19/570 dead transitions. [2024-11-27 20:02:03,793 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 570 transitions, 6558 flow [2024-11-27 20:02:03,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-27 20:02:03,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-27 20:02:03,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 397 transitions. [2024-11-27 20:02:03,796 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7297794117647058 [2024-11-27 20:02:03,797 INFO L175 Difference]: Start difference. First operand has 128 places, 277 transitions, 3271 flow. Second operand 17 states and 397 transitions. [2024-11-27 20:02:03,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 570 transitions, 6558 flow [2024-11-27 20:02:04,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 570 transitions, 6075 flow, removed 239 selfloop flow, removed 1 redundant places. [2024-11-27 20:02:04,344 INFO L231 Difference]: Finished difference. Result has 154 places, 379 transitions, 4327 flow [2024-11-27 20:02:04,345 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=2788, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=4327, PETRI_PLACES=154, PETRI_TRANSITIONS=379} [2024-11-27 20:02:04,346 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 118 predicate places. [2024-11-27 20:02:04,346 INFO L471 AbstractCegarLoop]: Abstraction has has 154 places, 379 transitions, 4327 flow [2024-11-27 20:02:04,346 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 12.235294117647058) internal successors, (208), 17 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:02:04,346 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:02:04,346 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:02:04,354 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b56c1c31-9bcd-4d87-a77a-22fd5db8a7ad/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-27 20:02:04,547 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b56c1c31-9bcd-4d87-a77a-22fd5db8a7ad/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:02:04,547 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-11-27 20:02:04,547 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:02:04,548 INFO L85 PathProgramCache]: Analyzing trace with hash -1828477333, now seen corresponding path program 2 times [2024-11-27 20:02:04,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:02:04,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245792412] [2024-11-27 20:02:04,548 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 20:02:04,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:02:04,569 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 20:02:04,570 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:02:04,882 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:02:04,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:02:04,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245792412] [2024-11-27 20:02:04,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245792412] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:02:04,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191962061] [2024-11-27 20:02:04,883 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 20:02:04,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:02:04,883 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b56c1c31-9bcd-4d87-a77a-22fd5db8a7ad/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:02:04,886 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b56c1c31-9bcd-4d87-a77a-22fd5db8a7ad/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:02:04,890 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b56c1c31-9bcd-4d87-a77a-22fd5db8a7ad/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-27 20:02:05,184 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 20:02:05,184 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:02:05,185 INFO L256 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-27 20:02:05,187 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:02:06,844 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:02:06,844 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:02:07,530 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:02:07,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191962061] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:02:07,530 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 20:02:07,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 6, 6] total 12 [2024-11-27 20:02:07,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090289684] [2024-11-27 20:02:07,530 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 20:02:07,531 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-27 20:02:07,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:02:07,531 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-27 20:02:07,531 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2024-11-27 20:02:07,532 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 32 [2024-11-27 20:02:07,532 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 379 transitions, 4327 flow. Second operand has 13 states, 13 states have (on average 13.23076923076923) internal successors, (172), 13 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:02:07,532 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:02:07,532 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 32 [2024-11-27 20:02:07,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:02:19,520 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-27 20:02:24,490 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-27 20:02:29,732 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.84s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-27 20:02:34,580 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-27 20:02:39,086 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-27 20:02:41,442 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.67s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-27 20:02:43,852 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.21s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-27 20:02:45,038 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-27 20:02:49,063 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-27 20:02:53,580 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-27 20:02:56,742 INFO L124 PetriNetUnfolderBase]: 8273/11537 cut-off events. [2024-11-27 20:02:56,742 INFO L125 PetriNetUnfolderBase]: For 117676/117676 co-relation queries the response was YES. [2024-11-27 20:02:56,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79466 conditions, 11537 events. 8273/11537 cut-off events. For 117676/117676 co-relation queries the response was YES. Maximal size of possible extension queue 675. Compared 63755 event pairs, 544 based on Foata normal form. 35/11562 useless extension candidates. Maximal degree in co-relation 78667. Up to 8047 conditions per place. [2024-11-27 20:02:56,872 INFO L140 encePairwiseOnDemand]: 24/32 looper letters, 545 selfloop transitions, 173 changer transitions 15/738 dead transitions. [2024-11-27 20:02:56,872 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 738 transitions, 9111 flow [2024-11-27 20:02:56,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-27 20:02:56,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-11-27 20:02:56,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 425 transitions. [2024-11-27 20:02:56,875 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7378472222222222 [2024-11-27 20:02:56,875 INFO L175 Difference]: Start difference. First operand has 154 places, 379 transitions, 4327 flow. Second operand 18 states and 425 transitions. [2024-11-27 20:02:56,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 738 transitions, 9111 flow [2024-11-27 20:02:57,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 738 transitions, 8464 flow, removed 321 selfloop flow, removed 1 redundant places. [2024-11-27 20:02:57,555 INFO L231 Difference]: Finished difference. Result has 182 places, 522 transitions, 6323 flow [2024-11-27 20:02:57,555 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=3810, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=6323, PETRI_PLACES=182, PETRI_TRANSITIONS=522} [2024-11-27 20:02:57,556 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 146 predicate places. [2024-11-27 20:02:57,556 INFO L471 AbstractCegarLoop]: Abstraction has has 182 places, 522 transitions, 6323 flow [2024-11-27 20:02:57,556 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 13.23076923076923) internal successors, (172), 13 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:02:57,556 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:02:57,557 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:02:57,564 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b56c1c31-9bcd-4d87-a77a-22fd5db8a7ad/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-27 20:02:57,757 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b56c1c31-9bcd-4d87-a77a-22fd5db8a7ad/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:02:57,757 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-11-27 20:02:57,758 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:02:57,758 INFO L85 PathProgramCache]: Analyzing trace with hash -470091808, now seen corresponding path program 3 times [2024-11-27 20:02:57,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:02:57,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799267358] [2024-11-27 20:02:57,758 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 20:02:57,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:02:57,776 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-27 20:02:57,776 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:02:57,951 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:02:57,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:02:57,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799267358] [2024-11-27 20:02:57,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799267358] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:02:57,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090593129] [2024-11-27 20:02:57,952 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 20:02:57,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:02:57,952 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b56c1c31-9bcd-4d87-a77a-22fd5db8a7ad/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:02:57,954 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b56c1c31-9bcd-4d87-a77a-22fd5db8a7ad/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:02:57,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b56c1c31-9bcd-4d87-a77a-22fd5db8a7ad/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-27 20:02:58,348 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-27 20:02:58,348 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:02:58,349 INFO L256 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-27 20:02:58,353 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:03:21,812 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:03:21,812 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:03:54,335 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:03:54,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090593129] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:03:54,336 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 20:03:54,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 7] total 15 [2024-11-27 20:03:54,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879579810] [2024-11-27 20:03:54,336 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 20:03:54,336 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-27 20:03:54,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:03:54,337 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-27 20:03:54,337 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=179, Unknown=13, NotChecked=0, Total=240 [2024-11-27 20:03:54,337 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 32 [2024-11-27 20:03:54,337 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 522 transitions, 6323 flow. Second operand has 16 states, 16 states have (on average 12.5625) internal successors, (201), 16 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:03:54,338 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:03:54,338 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 32 [2024-11-27 20:03:54,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:04:00,375 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-27 20:04:04,391 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-27 20:04:13,340 WARN L286 SmtUtils]: Spent 8.14s on a formula simplification. DAG size of input: 39 DAG size of output: 36 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-27 20:04:23,127 INFO L124 PetriNetUnfolderBase]: 9809/13661 cut-off events. [2024-11-27 20:04:23,127 INFO L125 PetriNetUnfolderBase]: For 193342/193342 co-relation queries the response was YES. [2024-11-27 20:04:23,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100196 conditions, 13661 events. 9809/13661 cut-off events. For 193342/193342 co-relation queries the response was YES. Maximal size of possible extension queue 783. Compared 76575 event pairs, 399 based on Foata normal form. 164/13821 useless extension candidates. Maximal degree in co-relation 99245. Up to 3713 conditions per place. [2024-11-27 20:04:23,413 INFO L140 encePairwiseOnDemand]: 25/32 looper letters, 786 selfloop transitions, 179 changer transitions 27/997 dead transitions. [2024-11-27 20:04:23,413 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 997 transitions, 12983 flow [2024-11-27 20:04:23,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-27 20:04:23,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-27 20:04:23,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 324 transitions. [2024-11-27 20:04:23,415 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7232142857142857 [2024-11-27 20:04:23,415 INFO L175 Difference]: Start difference. First operand has 182 places, 522 transitions, 6323 flow. Second operand 14 states and 324 transitions. [2024-11-27 20:04:23,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 997 transitions, 12983 flow [2024-11-27 20:04:24,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 997 transitions, 12412 flow, removed 282 selfloop flow, removed 1 redundant places. [2024-11-27 20:04:24,541 INFO L231 Difference]: Finished difference. Result has 199 places, 570 transitions, 7088 flow [2024-11-27 20:04:24,541 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=5802, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=522, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=7088, PETRI_PLACES=199, PETRI_TRANSITIONS=570} [2024-11-27 20:04:24,542 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 163 predicate places. [2024-11-27 20:04:24,542 INFO L471 AbstractCegarLoop]: Abstraction has has 199 places, 570 transitions, 7088 flow [2024-11-27 20:04:24,542 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 12.5625) internal successors, (201), 16 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:04:24,542 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:04:24,543 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:04:24,550 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b56c1c31-9bcd-4d87-a77a-22fd5db8a7ad/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-27 20:04:24,743 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b56c1c31-9bcd-4d87-a77a-22fd5db8a7ad/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-27 20:04:24,743 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-11-27 20:04:24,744 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:04:24,744 INFO L85 PathProgramCache]: Analyzing trace with hash 1689423303, now seen corresponding path program 4 times [2024-11-27 20:04:24,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:04:24,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288553187] [2024-11-27 20:04:24,745 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-27 20:04:24,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:04:24,762 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-27 20:04:24,763 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:04:24,959 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:04:24,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:04:24,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288553187] [2024-11-27 20:04:24,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288553187] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:04:24,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513340563] [2024-11-27 20:04:24,959 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-27 20:04:24,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:04:24,960 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b56c1c31-9bcd-4d87-a77a-22fd5db8a7ad/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:04:24,963 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b56c1c31-9bcd-4d87-a77a-22fd5db8a7ad/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:04:24,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b56c1c31-9bcd-4d87-a77a-22fd5db8a7ad/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-27 20:04:25,853 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-27 20:04:25,853 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:04:25,854 INFO L256 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-27 20:04:25,856 INFO L279 TraceCheckSpWp]: Computing forward predicates...