./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-bad-counter-queue2.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_3890e4aa-a98d-499c-aba5-ded5e1c7ed18/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3890e4aa-a98d-499c-aba5-ded5e1c7ed18/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_3890e4aa-a98d-499c-aba5-ded5e1c7ed18/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3890e4aa-a98d-499c-aba5-ded5e1c7ed18/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3890e4aa-a98d-499c-aba5-ded5e1c7ed18/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_3890e4aa-a98d-499c-aba5-ded5e1c7ed18/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 14a9c1cac7f040ebf84fc8e1c821294cab75b8332a1643f6e05ef67dfff453ec --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-27 23:38:48,096 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-27 23:38:48,184 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3890e4aa-a98d-499c-aba5-ded5e1c7ed18/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-27 23:38:48,192 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-27 23:38:48,192 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-27 23:38:48,224 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-27 23:38:48,225 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-27 23:38:48,225 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-27 23:38:48,225 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-27 23:38:48,225 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-27 23:38:48,226 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-27 23:38:48,226 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-27 23:38:48,226 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-27 23:38:48,226 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-27 23:38:48,226 INFO L153 SettingsManager]: * Use SBE=true [2024-11-27 23:38:48,227 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-27 23:38:48,227 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-27 23:38:48,227 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-27 23:38:48,227 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-27 23:38:48,227 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-27 23:38:48,227 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-27 23:38:48,228 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-27 23:38:48,228 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-27 23:38:48,228 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-27 23:38:48,228 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-27 23:38:48,228 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-27 23:38:48,228 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-27 23:38:48,228 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-27 23:38:48,229 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-27 23:38:48,229 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-27 23:38:48,229 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-27 23:38:48,229 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-27 23:38:48,230 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 23:38:48,230 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-27 23:38:48,230 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-27 23:38:48,230 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-27 23:38:48,230 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-27 23:38:48,231 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 23:38:48,231 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-27 23:38:48,231 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-27 23:38:48,231 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-11-27 23:38:48,231 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-27 23:38:48,231 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-27 23:38:48,231 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-27 23:38:48,232 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-27 23:38:48,232 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-27 23:38:48,232 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-27 23:38:48,232 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-27 23:38:48,232 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_3890e4aa-a98d-499c-aba5-ded5e1c7ed18/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 -> 14a9c1cac7f040ebf84fc8e1c821294cab75b8332a1643f6e05ef67dfff453ec [2024-11-27 23:38:48,579 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-27 23:38:48,592 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-27 23:38:48,594 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-27 23:38:48,598 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-27 23:38:48,598 INFO L274 PluginConnector]: CDTParser initialized [2024-11-27 23:38:48,600 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3890e4aa-a98d-499c-aba5-ded5e1c7ed18/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c [2024-11-27 23:38:51,570 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3890e4aa-a98d-499c-aba5-ded5e1c7ed18/bin/uautomizer-verify-aQ6SnzHsRB/data/b56ae80b3/e05886c2ac62481abf02c1124a2f2566/FLAG5e77dbc2f [2024-11-27 23:38:51,822 INFO L384 CDTParser]: Found 1 translation units. [2024-11-27 23:38:51,823 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3890e4aa-a98d-499c-aba5-ded5e1c7ed18/sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c [2024-11-27 23:38:51,830 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3890e4aa-a98d-499c-aba5-ded5e1c7ed18/bin/uautomizer-verify-aQ6SnzHsRB/data/b56ae80b3/e05886c2ac62481abf02c1124a2f2566/FLAG5e77dbc2f [2024-11-27 23:38:51,844 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3890e4aa-a98d-499c-aba5-ded5e1c7ed18/bin/uautomizer-verify-aQ6SnzHsRB/data/b56ae80b3/e05886c2ac62481abf02c1124a2f2566 [2024-11-27 23:38:51,847 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-27 23:38:51,850 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-27 23:38:51,852 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-27 23:38:51,852 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-27 23:38:51,856 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-27 23:38:51,857 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 11:38:51" (1/1) ... [2024-11-27 23:38:51,858 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10e0a73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:38:51, skipping insertion in model container [2024-11-27 23:38:51,859 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 11:38:51" (1/1) ... [2024-11-27 23:38:51,877 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-27 23:38:52,052 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_3890e4aa-a98d-499c-aba5-ded5e1c7ed18/sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c[2297,2310] [2024-11-27 23:38:52,071 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-27 23:38:52,085 INFO L200 MainTranslator]: Completed pre-run [2024-11-27 23:38:52,110 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_3890e4aa-a98d-499c-aba5-ded5e1c7ed18/sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c[2297,2310] [2024-11-27 23:38:52,122 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-27 23:38:52,144 INFO L204 MainTranslator]: Completed translation [2024-11-27 23:38:52,146 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:38:52 WrapperNode [2024-11-27 23:38:52,147 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-27 23:38:52,148 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-27 23:38:52,148 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-27 23:38:52,148 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-27 23:38:52,157 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:38:52" (1/1) ... [2024-11-27 23:38:52,166 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:38:52" (1/1) ... [2024-11-27 23:38:52,193 INFO L138 Inliner]: procedures = 25, calls = 26, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 129 [2024-11-27 23:38:52,194 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-27 23:38:52,194 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-27 23:38:52,194 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-27 23:38:52,194 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-27 23:38:52,207 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:38:52" (1/1) ... [2024-11-27 23:38:52,207 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:38:52" (1/1) ... [2024-11-27 23:38:52,209 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:38:52" (1/1) ... [2024-11-27 23:38:52,234 INFO L175 MemorySlicer]: Split 5 memory accesses to 2 slices as follows [2, 3]. 60 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-11-27 23:38:52,234 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:38:52" (1/1) ... [2024-11-27 23:38:52,234 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:38:52" (1/1) ... [2024-11-27 23:38:52,248 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:38:52" (1/1) ... [2024-11-27 23:38:52,249 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:38:52" (1/1) ... [2024-11-27 23:38:52,255 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:38:52" (1/1) ... [2024-11-27 23:38:52,256 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:38:52" (1/1) ... [2024-11-27 23:38:52,259 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:38:52" (1/1) ... [2024-11-27 23:38:52,261 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-27 23:38:52,264 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-27 23:38:52,265 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-27 23:38:52,265 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-27 23:38:52,266 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:38:52" (1/1) ... [2024-11-27 23:38:52,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 23:38:52,287 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3890e4aa-a98d-499c-aba5-ded5e1c7ed18/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:38:52,296 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3890e4aa-a98d-499c-aba5-ded5e1c7ed18/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-27 23:38:52,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3890e4aa-a98d-499c-aba5-ded5e1c7ed18/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-27 23:38:52,319 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-27 23:38:52,320 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-27 23:38:52,320 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-27 23:38:52,320 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-27 23:38:52,320 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-27 23:38:52,320 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-27 23:38:52,320 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-27 23:38:52,320 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-27 23:38:52,320 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-27 23:38:52,320 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-27 23:38:52,320 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-27 23:38:52,320 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-27 23:38:52,320 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-27 23:38:52,320 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-27 23:38:52,321 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-27 23:38:52,321 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-27 23:38:52,322 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 23:38:52,445 INFO L234 CfgBuilder]: Building ICFG [2024-11-27 23:38:52,448 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-27 23:38:52,802 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-27 23:38:52,802 INFO L283 CfgBuilder]: Performing block encoding [2024-11-27 23:38:53,097 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-27 23:38:53,098 INFO L312 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-27 23:38:53,099 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 11:38:53 BoogieIcfgContainer [2024-11-27 23:38:53,099 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-27 23:38:53,101 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-27 23:38:53,101 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-27 23:38:53,120 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-27 23:38:53,121 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.11 11:38:51" (1/3) ... [2024-11-27 23:38:53,121 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4967fe61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 11:38:53, skipping insertion in model container [2024-11-27 23:38:53,121 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:38:52" (2/3) ... [2024-11-27 23:38:53,122 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4967fe61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 11:38:53, skipping insertion in model container [2024-11-27 23:38:53,122 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 11:38:53" (3/3) ... [2024-11-27 23:38:53,123 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-bad-counter-queue2.wvr.c [2024-11-27 23:38:53,138 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-27 23:38:53,140 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-bad-counter-queue2.wvr.c that has 3 procedures, 22 locations, 1 initial locations, 3 loop locations, and 1 error locations. [2024-11-27 23:38:53,140 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-27 23:38:53,204 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-27 23:38:53,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 28 places, 24 transitions, 62 flow [2024-11-27 23:38:53,284 INFO L124 PetriNetUnfolderBase]: 3/22 cut-off events. [2024-11-27 23:38:53,286 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-27 23:38:53,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31 conditions, 22 events. 3/22 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 22 event pairs, 0 based on Foata normal form. 0/18 useless extension candidates. Maximal degree in co-relation 15. Up to 2 conditions per place. [2024-11-27 23:38:53,290 INFO L82 GeneralOperation]: Start removeDead. Operand has 28 places, 24 transitions, 62 flow [2024-11-27 23:38:53,293 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 25 places, 21 transitions, 54 flow [2024-11-27 23:38:53,304 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-27 23:38:53,323 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;@67e215d8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-27 23:38:53,323 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-11-27 23:38:53,340 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-27 23:38:53,341 INFO L124 PetriNetUnfolderBase]: 3/20 cut-off events. [2024-11-27 23:38:53,341 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-27 23:38:53,341 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 23:38:53,342 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:38:53,342 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-27 23:38:53,348 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:38:53,348 INFO L85 PathProgramCache]: Analyzing trace with hash 31331184, now seen corresponding path program 1 times [2024-11-27 23:38:53,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:38:53,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335327322] [2024-11-27 23:38:53,357 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:38:53,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:38:53,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:38:53,661 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 23:38:53,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:38:53,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335327322] [2024-11-27 23:38:53,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335327322] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:38:53,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:38:53,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-27 23:38:53,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649665183] [2024-11-27 23:38:53,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:38:53,670 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-27 23:38:53,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:38:53,697 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-27 23:38:53,698 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-27 23:38:53,700 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2024-11-27 23:38:53,702 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 21 transitions, 54 flow. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:38:53,703 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 23:38:53,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2024-11-27 23:38:53,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 23:38:53,875 INFO L124 PetriNetUnfolderBase]: 93/183 cut-off events. [2024-11-27 23:38:53,876 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2024-11-27 23:38:53,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 375 conditions, 183 events. 93/183 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 595 event pairs, 22 based on Foata normal form. 1/182 useless extension candidates. Maximal degree in co-relation 317. Up to 113 conditions per place. [2024-11-27 23:38:53,884 INFO L140 encePairwiseOnDemand]: 20/24 looper letters, 25 selfloop transitions, 3 changer transitions 1/32 dead transitions. [2024-11-27 23:38:53,885 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 32 transitions, 143 flow [2024-11-27 23:38:53,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-27 23:38:53,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-27 23:38:53,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 45 transitions. [2024-11-27 23:38:53,901 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-11-27 23:38:53,908 INFO L175 Difference]: Start difference. First operand has 25 places, 21 transitions, 54 flow. Second operand 3 states and 45 transitions. [2024-11-27 23:38:53,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 32 transitions, 143 flow [2024-11-27 23:38:53,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 32 transitions, 129 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-27 23:38:53,918 INFO L231 Difference]: Finished difference. Result has 24 places, 23 transitions, 65 flow [2024-11-27 23:38:53,921 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=65, PETRI_PLACES=24, PETRI_TRANSITIONS=23} [2024-11-27 23:38:53,926 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, -1 predicate places. [2024-11-27 23:38:53,926 INFO L471 AbstractCegarLoop]: Abstraction has has 24 places, 23 transitions, 65 flow [2024-11-27 23:38:53,926 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:38:53,926 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 23:38:53,926 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:38:53,927 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-27 23:38:53,927 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-27 23:38:53,929 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:38:53,930 INFO L85 PathProgramCache]: Analyzing trace with hash 75890020, now seen corresponding path program 1 times [2024-11-27 23:38:53,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:38:53,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571007429] [2024-11-27 23:38:53,930 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:38:53,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:38:53,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:38:54,180 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 23:38:54,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:38:54,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571007429] [2024-11-27 23:38:54,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571007429] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:38:54,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:38:54,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-27 23:38:54,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306241710] [2024-11-27 23:38:54,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:38:54,182 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-27 23:38:54,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:38:54,183 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-27 23:38:54,183 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-27 23:38:54,193 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 24 [2024-11-27 23:38:54,193 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 23 transitions, 65 flow. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states 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 23:38:54,193 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 23:38:54,193 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 24 [2024-11-27 23:38:54,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 23:38:54,440 INFO L124 PetriNetUnfolderBase]: 171/337 cut-off events. [2024-11-27 23:38:54,443 INFO L125 PetriNetUnfolderBase]: For 51/51 co-relation queries the response was YES. [2024-11-27 23:38:54,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 747 conditions, 337 events. 171/337 cut-off events. For 51/51 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1365 event pairs, 111 based on Foata normal form. 0/317 useless extension candidates. Maximal degree in co-relation 263. Up to 209 conditions per place. [2024-11-27 23:38:54,450 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 40 selfloop transitions, 5 changer transitions 0/47 dead transitions. [2024-11-27 23:38:54,450 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 47 transitions, 220 flow [2024-11-27 23:38:54,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-27 23:38:54,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-27 23:38:54,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 62 transitions. [2024-11-27 23:38:54,451 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5166666666666667 [2024-11-27 23:38:54,451 INFO L175 Difference]: Start difference. First operand has 24 places, 23 transitions, 65 flow. Second operand 5 states and 62 transitions. [2024-11-27 23:38:54,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 47 transitions, 220 flow [2024-11-27 23:38:54,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 47 transitions, 215 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-27 23:38:54,453 INFO L231 Difference]: Finished difference. Result has 30 places, 27 transitions, 98 flow [2024-11-27 23:38:54,453 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=98, PETRI_PLACES=30, PETRI_TRANSITIONS=27} [2024-11-27 23:38:54,454 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 5 predicate places. [2024-11-27 23:38:54,454 INFO L471 AbstractCegarLoop]: Abstraction has has 30 places, 27 transitions, 98 flow [2024-11-27 23:38:54,454 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states 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 23:38:54,456 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 23:38:54,457 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:38:54,458 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-27 23:38:54,458 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-27 23:38:54,460 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:38:54,460 INFO L85 PathProgramCache]: Analyzing trace with hash -1525224593, now seen corresponding path program 1 times [2024-11-27 23:38:54,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:38:54,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113215592] [2024-11-27 23:38:54,461 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:38:54,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:38:54,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:38:54,686 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 23:38:54,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:38:54,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113215592] [2024-11-27 23:38:54,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113215592] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:38:54,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:38:54,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-27 23:38:54,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730347794] [2024-11-27 23:38:54,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:38:54,688 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-27 23:38:54,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:38:54,689 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-27 23:38:54,689 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-27 23:38:54,700 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 24 [2024-11-27 23:38:54,701 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 27 transitions, 98 flow. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states 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 23:38:54,701 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 23:38:54,701 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 24 [2024-11-27 23:38:54,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 23:38:54,890 INFO L124 PetriNetUnfolderBase]: 138/269 cut-off events. [2024-11-27 23:38:54,891 INFO L125 PetriNetUnfolderBase]: For 99/108 co-relation queries the response was YES. [2024-11-27 23:38:54,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 674 conditions, 269 events. 138/269 cut-off events. For 99/108 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 978 event pairs, 95 based on Foata normal form. 0/251 useless extension candidates. Maximal degree in co-relation 519. Up to 205 conditions per place. [2024-11-27 23:38:54,895 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 20 selfloop transitions, 2 changer transitions 15/39 dead transitions. [2024-11-27 23:38:54,897 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 39 transitions, 209 flow [2024-11-27 23:38:54,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-27 23:38:54,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-27 23:38:54,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 56 transitions. [2024-11-27 23:38:54,899 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2024-11-27 23:38:54,899 INFO L175 Difference]: Start difference. First operand has 30 places, 27 transitions, 98 flow. Second operand 5 states and 56 transitions. [2024-11-27 23:38:54,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 39 transitions, 209 flow [2024-11-27 23:38:54,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 39 transitions, 205 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-27 23:38:54,903 INFO L231 Difference]: Finished difference. Result has 35 places, 24 transitions, 86 flow [2024-11-27 23:38:54,905 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=86, PETRI_PLACES=35, PETRI_TRANSITIONS=24} [2024-11-27 23:38:54,906 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 10 predicate places. [2024-11-27 23:38:54,906 INFO L471 AbstractCegarLoop]: Abstraction has has 35 places, 24 transitions, 86 flow [2024-11-27 23:38:54,906 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states 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 23:38:54,906 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 23:38:54,906 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:38:54,906 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-27 23:38:54,907 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-27 23:38:54,907 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:38:54,907 INFO L85 PathProgramCache]: Analyzing trace with hash 932183859, now seen corresponding path program 1 times [2024-11-27 23:38:54,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:38:54,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970634183] [2024-11-27 23:38:54,907 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:38:54,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:38:54,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:38:55,083 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 23:38:55,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:38:55,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970634183] [2024-11-27 23:38:55,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970634183] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:38:55,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928426002] [2024-11-27 23:38:55,084 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:38:55,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:38:55,085 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3890e4aa-a98d-499c-aba5-ded5e1c7ed18/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:38:55,087 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3890e4aa-a98d-499c-aba5-ded5e1c7ed18/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:38:55,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3890e4aa-a98d-499c-aba5-ded5e1c7ed18/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-27 23:38:55,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:38:55,193 INFO L256 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-27 23:38:55,197 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:38:55,287 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 23:38:55,287 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:38:55,348 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 23:38:55,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928426002] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-27 23:38:55,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-27 23:38:55,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2024-11-27 23:38:55,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162182600] [2024-11-27 23:38:55,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:38:55,349 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-27 23:38:55,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:38:55,349 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-27 23:38:55,349 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-11-27 23:38:55,359 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 24 [2024-11-27 23:38:55,360 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 24 transitions, 86 flow. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states 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 23:38:55,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 23:38:55,360 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 24 [2024-11-27 23:38:55,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 23:38:55,472 INFO L124 PetriNetUnfolderBase]: 116/211 cut-off events. [2024-11-27 23:38:55,472 INFO L125 PetriNetUnfolderBase]: For 73/88 co-relation queries the response was YES. [2024-11-27 23:38:55,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 566 conditions, 211 events. 116/211 cut-off events. For 73/88 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 695 event pairs, 33 based on Foata normal form. 0/200 useless extension candidates. Maximal degree in co-relation 549. Up to 109 conditions per place. [2024-11-27 23:38:55,477 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 25 selfloop transitions, 5 changer transitions 0/32 dead transitions. [2024-11-27 23:38:55,477 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 32 transitions, 173 flow [2024-11-27 23:38:55,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-27 23:38:55,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-27 23:38:55,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 48 transitions. [2024-11-27 23:38:55,479 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-11-27 23:38:55,479 INFO L175 Difference]: Start difference. First operand has 35 places, 24 transitions, 86 flow. Second operand 5 states and 48 transitions. [2024-11-27 23:38:55,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 32 transitions, 173 flow [2024-11-27 23:38:55,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 32 transitions, 149 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-11-27 23:38:55,481 INFO L231 Difference]: Finished difference. Result has 31 places, 25 transitions, 91 flow [2024-11-27 23:38:55,481 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=91, PETRI_PLACES=31, PETRI_TRANSITIONS=25} [2024-11-27 23:38:55,482 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 6 predicate places. [2024-11-27 23:38:55,482 INFO L471 AbstractCegarLoop]: Abstraction has has 31 places, 25 transitions, 91 flow [2024-11-27 23:38:55,482 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states 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 23:38:55,482 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 23:38:55,482 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:38:55,491 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3890e4aa-a98d-499c-aba5-ded5e1c7ed18/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-27 23:38:55,686 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3890e4aa-a98d-499c-aba5-ded5e1c7ed18/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:38:55,687 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-27 23:38:55,687 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:38:55,687 INFO L85 PathProgramCache]: Analyzing trace with hash 166170742, now seen corresponding path program 1 times [2024-11-27 23:38:55,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:38:55,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140094288] [2024-11-27 23:38:55,688 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:38:55,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:38:55,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:38:55,849 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 23:38:55,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:38:55,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140094288] [2024-11-27 23:38:55,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140094288] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:38:55,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713631699] [2024-11-27 23:38:55,849 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:38:55,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:38:55,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3890e4aa-a98d-499c-aba5-ded5e1c7ed18/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:38:55,852 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3890e4aa-a98d-499c-aba5-ded5e1c7ed18/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:38:55,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3890e4aa-a98d-499c-aba5-ded5e1c7ed18/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-27 23:38:55,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:38:55,935 INFO L256 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-27 23:38:55,937 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:38:55,991 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 23:38:55,994 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:38:56,065 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 23:38:56,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713631699] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-27 23:38:56,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-27 23:38:56,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2024-11-27 23:38:56,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693442860] [2024-11-27 23:38:56,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:38:56,067 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-27 23:38:56,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:38:56,067 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-27 23:38:56,068 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-11-27 23:38:56,080 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 24 [2024-11-27 23:38:56,080 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 25 transitions, 91 flow. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states 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 23:38:56,081 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 23:38:56,081 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 24 [2024-11-27 23:38:56,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 23:38:56,189 INFO L124 PetriNetUnfolderBase]: 117/219 cut-off events. [2024-11-27 23:38:56,191 INFO L125 PetriNetUnfolderBase]: For 98/98 co-relation queries the response was YES. [2024-11-27 23:38:56,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 584 conditions, 219 events. 117/219 cut-off events. For 98/98 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 682 event pairs, 35 based on Foata normal form. 0/204 useless extension candidates. Maximal degree in co-relation 563. Up to 113 conditions per place. [2024-11-27 23:38:56,193 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 26 selfloop transitions, 5 changer transitions 0/34 dead transitions. [2024-11-27 23:38:56,193 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 34 transitions, 186 flow [2024-11-27 23:38:56,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-27 23:38:56,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-27 23:38:56,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 49 transitions. [2024-11-27 23:38:56,194 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4083333333333333 [2024-11-27 23:38:56,195 INFO L175 Difference]: Start difference. First operand has 31 places, 25 transitions, 91 flow. Second operand 5 states and 49 transitions. [2024-11-27 23:38:56,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 34 transitions, 186 flow [2024-11-27 23:38:56,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 34 transitions, 178 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-27 23:38:56,196 INFO L231 Difference]: Finished difference. Result has 34 places, 26 transitions, 108 flow [2024-11-27 23:38:56,197 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=85, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=108, PETRI_PLACES=34, PETRI_TRANSITIONS=26} [2024-11-27 23:38:56,197 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 9 predicate places. [2024-11-27 23:38:56,199 INFO L471 AbstractCegarLoop]: Abstraction has has 34 places, 26 transitions, 108 flow [2024-11-27 23:38:56,200 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states 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 23:38:56,200 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 23:38:56,201 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] [2024-11-27 23:38:56,212 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3890e4aa-a98d-499c-aba5-ded5e1c7ed18/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-27 23:38:56,402 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3890e4aa-a98d-499c-aba5-ded5e1c7ed18/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:38:56,402 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-27 23:38:56,403 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:38:56,403 INFO L85 PathProgramCache]: Analyzing trace with hash -283112178, now seen corresponding path program 1 times [2024-11-27 23:38:56,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:38:56,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226473884] [2024-11-27 23:38:56,403 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:38:56,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:38:56,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:38:56,951 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 23:38:56,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:38:56,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226473884] [2024-11-27 23:38:56,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226473884] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:38:56,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:38:56,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-27 23:38:56,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926905953] [2024-11-27 23:38:56,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:38:56,952 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-27 23:38:56,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:38:56,953 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-27 23:38:56,953 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-11-27 23:38:56,988 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2024-11-27 23:38:56,989 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 26 transitions, 108 flow. Second operand has 10 states, 10 states have (on average 6.8) internal successors, (68), 10 states have internal predecessors, (68), 0 states have call successors, (0), 0 states 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 23:38:56,989 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 23:38:56,989 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2024-11-27 23:38:56,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 23:38:57,167 INFO L124 PetriNetUnfolderBase]: 128/256 cut-off events. [2024-11-27 23:38:57,167 INFO L125 PetriNetUnfolderBase]: For 187/187 co-relation queries the response was YES. [2024-11-27 23:38:57,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 757 conditions, 256 events. 128/256 cut-off events. For 187/187 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 880 event pairs, 29 based on Foata normal form. 1/254 useless extension candidates. Maximal degree in co-relation 733. Up to 157 conditions per place. [2024-11-27 23:38:57,169 INFO L140 encePairwiseOnDemand]: 15/24 looper letters, 30 selfloop transitions, 17 changer transitions 1/53 dead transitions. [2024-11-27 23:38:57,170 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 53 transitions, 311 flow [2024-11-27 23:38:57,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-27 23:38:57,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-27 23:38:57,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 81 transitions. [2024-11-27 23:38:57,171 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.48214285714285715 [2024-11-27 23:38:57,171 INFO L175 Difference]: Start difference. First operand has 34 places, 26 transitions, 108 flow. Second operand 7 states and 81 transitions. [2024-11-27 23:38:57,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 53 transitions, 311 flow [2024-11-27 23:38:57,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 53 transitions, 300 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-27 23:38:57,174 INFO L231 Difference]: Finished difference. Result has 41 places, 39 transitions, 233 flow [2024-11-27 23:38:57,174 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=233, PETRI_PLACES=41, PETRI_TRANSITIONS=39} [2024-11-27 23:38:57,175 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 16 predicate places. [2024-11-27 23:38:57,175 INFO L471 AbstractCegarLoop]: Abstraction has has 41 places, 39 transitions, 233 flow [2024-11-27 23:38:57,175 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.8) internal successors, (68), 10 states have internal predecessors, (68), 0 states have call successors, (0), 0 states 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 23:38:57,175 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 23:38:57,175 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] [2024-11-27 23:38:57,175 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-27 23:38:57,176 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-27 23:38:57,176 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:38:57,176 INFO L85 PathProgramCache]: Analyzing trace with hash -29379000, now seen corresponding path program 2 times [2024-11-27 23:38:57,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:38:57,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636861676] [2024-11-27 23:38:57,177 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 23:38:57,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:38:57,207 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 23:38:57,207 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:38:57,845 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 23:38:57,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:38:57,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636861676] [2024-11-27 23:38:57,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636861676] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:38:57,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251979169] [2024-11-27 23:38:57,847 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 23:38:57,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:38:57,847 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3890e4aa-a98d-499c-aba5-ded5e1c7ed18/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:38:57,849 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3890e4aa-a98d-499c-aba5-ded5e1c7ed18/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:38:57,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3890e4aa-a98d-499c-aba5-ded5e1c7ed18/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-27 23:38:57,933 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 23:38:57,933 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:38:57,935 INFO L256 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-27 23:38:57,936 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:38:58,062 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 23:38:58,063 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:38:58,127 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 23:38:58,128 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 14 [2024-11-27 23:38:58,202 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 23:38:58,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [251979169] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:38:58,202 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:38:58,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 5] total 13 [2024-11-27 23:38:58,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014779109] [2024-11-27 23:38:58,203 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:38:58,203 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-27 23:38:58,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:38:58,204 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-27 23:38:58,204 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2024-11-27 23:38:58,253 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2024-11-27 23:38:58,253 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 39 transitions, 233 flow. Second operand has 14 states, 14 states have (on average 7.642857142857143) internal successors, (107), 14 states have internal predecessors, (107), 0 states have call successors, (0), 0 states 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 23:38:58,253 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 23:38:58,253 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2024-11-27 23:38:58,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 23:38:58,732 INFO L124 PetriNetUnfolderBase]: 167/331 cut-off events. [2024-11-27 23:38:58,732 INFO L125 PetriNetUnfolderBase]: For 512/512 co-relation queries the response was YES. [2024-11-27 23:38:58,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1175 conditions, 331 events. 167/331 cut-off events. For 512/512 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1270 event pairs, 28 based on Foata normal form. 1/328 useless extension candidates. Maximal degree in co-relation 1146. Up to 161 conditions per place. [2024-11-27 23:38:58,737 INFO L140 encePairwiseOnDemand]: 14/24 looper letters, 34 selfloop transitions, 34 changer transitions 1/74 dead transitions. [2024-11-27 23:38:58,739 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 74 transitions, 538 flow [2024-11-27 23:38:58,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-27 23:38:58,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-27 23:38:58,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 109 transitions. [2024-11-27 23:38:58,741 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.45416666666666666 [2024-11-27 23:38:58,741 INFO L175 Difference]: Start difference. First operand has 41 places, 39 transitions, 233 flow. Second operand 10 states and 109 transitions. [2024-11-27 23:38:58,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 74 transitions, 538 flow [2024-11-27 23:38:58,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 74 transitions, 516 flow, removed 10 selfloop flow, removed 1 redundant places. [2024-11-27 23:38:58,748 INFO L231 Difference]: Finished difference. Result has 50 places, 55 transitions, 414 flow [2024-11-27 23:38:58,749 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=225, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=414, PETRI_PLACES=50, PETRI_TRANSITIONS=55} [2024-11-27 23:38:58,752 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 25 predicate places. [2024-11-27 23:38:58,752 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 55 transitions, 414 flow [2024-11-27 23:38:58,753 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.642857142857143) internal successors, (107), 14 states have internal predecessors, (107), 0 states have call successors, (0), 0 states 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 23:38:58,753 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 23:38:58,753 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] [2024-11-27 23:38:58,767 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3890e4aa-a98d-499c-aba5-ded5e1c7ed18/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-27 23:38:58,953 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3890e4aa-a98d-499c-aba5-ded5e1c7ed18/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:38:58,954 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-27 23:38:58,954 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:38:58,954 INFO L85 PathProgramCache]: Analyzing trace with hash -1077639454, now seen corresponding path program 3 times [2024-11-27 23:38:58,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:38:58,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598616515] [2024-11-27 23:38:58,954 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 23:38:58,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:38:58,984 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-27 23:38:58,985 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:38:59,480 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 23:38:59,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:38:59,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598616515] [2024-11-27 23:38:59,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598616515] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:38:59,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942109382] [2024-11-27 23:38:59,481 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 23:38:59,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:38:59,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3890e4aa-a98d-499c-aba5-ded5e1c7ed18/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:38:59,484 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3890e4aa-a98d-499c-aba5-ded5e1c7ed18/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:38:59,489 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3890e4aa-a98d-499c-aba5-ded5e1c7ed18/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-27 23:38:59,574 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-27 23:38:59,574 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:38:59,575 INFO L256 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-27 23:38:59,577 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:38:59,677 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 23:38:59,677 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:38:59,726 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 23:38:59,726 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 14 [2024-11-27 23:38:59,755 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 23:38:59,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942109382] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:38:59,755 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:38:59,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 13 [2024-11-27 23:38:59,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58018902] [2024-11-27 23:38:59,756 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:38:59,756 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-27 23:38:59,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:38:59,756 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-27 23:38:59,757 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2024-11-27 23:38:59,813 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2024-11-27 23:38:59,814 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 55 transitions, 414 flow. Second operand has 14 states, 14 states have (on average 7.428571428571429) internal successors, (104), 14 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:38:59,814 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 23:38:59,814 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2024-11-27 23:38:59,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 23:39:00,255 INFO L124 PetriNetUnfolderBase]: 224/452 cut-off events. [2024-11-27 23:39:00,255 INFO L125 PetriNetUnfolderBase]: For 997/997 co-relation queries the response was YES. [2024-11-27 23:39:00,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1732 conditions, 452 events. 224/452 cut-off events. For 997/997 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2039 event pairs, 31 based on Foata normal form. 1/447 useless extension candidates. Maximal degree in co-relation 1699. Up to 183 conditions per place. [2024-11-27 23:39:00,260 INFO L140 encePairwiseOnDemand]: 15/24 looper letters, 43 selfloop transitions, 49 changer transitions 1/98 dead transitions. [2024-11-27 23:39:00,260 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 98 transitions, 799 flow [2024-11-27 23:39:00,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-27 23:39:00,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-27 23:39:00,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 125 transitions. [2024-11-27 23:39:00,262 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4734848484848485 [2024-11-27 23:39:00,262 INFO L175 Difference]: Start difference. First operand has 50 places, 55 transitions, 414 flow. Second operand 11 states and 125 transitions. [2024-11-27 23:39:00,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 98 transitions, 799 flow [2024-11-27 23:39:00,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 98 transitions, 737 flow, removed 30 selfloop flow, removed 1 redundant places. [2024-11-27 23:39:00,275 INFO L231 Difference]: Finished difference. Result has 60 places, 71 transitions, 600 flow [2024-11-27 23:39:00,275 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=388, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=600, PETRI_PLACES=60, PETRI_TRANSITIONS=71} [2024-11-27 23:39:00,277 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 35 predicate places. [2024-11-27 23:39:00,278 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 71 transitions, 600 flow [2024-11-27 23:39:00,278 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.428571428571429) internal successors, (104), 14 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:39:00,278 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 23:39:00,278 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] [2024-11-27 23:39:00,288 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3890e4aa-a98d-499c-aba5-ded5e1c7ed18/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-27 23:39:00,482 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3890e4aa-a98d-499c-aba5-ded5e1c7ed18/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-11-27 23:39:00,483 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-27 23:39:00,483 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:39:00,483 INFO L85 PathProgramCache]: Analyzing trace with hash -871348898, now seen corresponding path program 4 times [2024-11-27 23:39:00,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:39:00,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46360173] [2024-11-27 23:39:00,483 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-27 23:39:00,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:39:00,508 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-27 23:39:00,509 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:39:00,852 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 23:39:00,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:39:00,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46360173] [2024-11-27 23:39:00,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46360173] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:39:00,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054384325] [2024-11-27 23:39:00,852 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-27 23:39:00,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:39:00,853 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3890e4aa-a98d-499c-aba5-ded5e1c7ed18/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:39:00,857 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3890e4aa-a98d-499c-aba5-ded5e1c7ed18/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:39:00,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3890e4aa-a98d-499c-aba5-ded5e1c7ed18/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-27 23:39:00,945 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-27 23:39:00,945 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:39:00,946 INFO L256 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-27 23:39:00,948 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:39:01,057 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 23:39:01,057 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:39:01,107 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 23:39:01,110 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 14 [2024-11-27 23:39:01,172 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 23:39:01,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054384325] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:39:01,173 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:39:01,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 13 [2024-11-27 23:39:01,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004781450] [2024-11-27 23:39:01,173 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:39:01,173 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-27 23:39:01,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:39:01,174 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-27 23:39:01,174 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2024-11-27 23:39:01,227 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2024-11-27 23:39:01,227 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 71 transitions, 600 flow. Second operand has 14 states, 14 states have (on average 7.428571428571429) internal successors, (104), 14 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:39:01,227 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 23:39:01,228 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2024-11-27 23:39:01,228 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 23:39:01,575 INFO L124 PetriNetUnfolderBase]: 263/532 cut-off events. [2024-11-27 23:39:01,575 INFO L125 PetriNetUnfolderBase]: For 1246/1246 co-relation queries the response was YES. [2024-11-27 23:39:01,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2096 conditions, 532 events. 263/532 cut-off events. For 1246/1246 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 2570 event pairs, 49 based on Foata normal form. 1/529 useless extension candidates. Maximal degree in co-relation 2060. Up to 381 conditions per place. [2024-11-27 23:39:01,582 INFO L140 encePairwiseOnDemand]: 15/24 looper letters, 70 selfloop transitions, 21 changer transitions 1/97 dead transitions. [2024-11-27 23:39:01,582 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 97 transitions, 907 flow [2024-11-27 23:39:01,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-27 23:39:01,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-27 23:39:01,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 91 transitions. [2024-11-27 23:39:01,583 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4739583333333333 [2024-11-27 23:39:01,583 INFO L175 Difference]: Start difference. First operand has 60 places, 71 transitions, 600 flow. Second operand 8 states and 91 transitions. [2024-11-27 23:39:01,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 97 transitions, 907 flow [2024-11-27 23:39:01,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 97 transitions, 867 flow, removed 19 selfloop flow, removed 1 redundant places. [2024-11-27 23:39:01,591 INFO L231 Difference]: Finished difference. Result has 69 places, 81 transitions, 705 flow [2024-11-27 23:39:01,591 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=582, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=705, PETRI_PLACES=69, PETRI_TRANSITIONS=81} [2024-11-27 23:39:01,591 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 44 predicate places. [2024-11-27 23:39:01,592 INFO L471 AbstractCegarLoop]: Abstraction has has 69 places, 81 transitions, 705 flow [2024-11-27 23:39:01,592 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.428571428571429) internal successors, (104), 14 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:39:01,592 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 23:39:01,592 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] [2024-11-27 23:39:01,603 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3890e4aa-a98d-499c-aba5-ded5e1c7ed18/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-27 23:39:01,795 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3890e4aa-a98d-499c-aba5-ded5e1c7ed18/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2024-11-27 23:39:01,796 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-27 23:39:01,796 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:39:01,796 INFO L85 PathProgramCache]: Analyzing trace with hash -1842451306, now seen corresponding path program 5 times [2024-11-27 23:39:01,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:39:01,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447890461] [2024-11-27 23:39:01,796 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-27 23:39:01,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:39:01,827 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 23:39:01,827 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:39:02,292 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 23:39:02,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:39:02,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447890461] [2024-11-27 23:39:02,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447890461] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:39:02,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736674678] [2024-11-27 23:39:02,293 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-27 23:39:02,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:39:02,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3890e4aa-a98d-499c-aba5-ded5e1c7ed18/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:39:02,296 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3890e4aa-a98d-499c-aba5-ded5e1c7ed18/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:39:02,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3890e4aa-a98d-499c-aba5-ded5e1c7ed18/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-27 23:39:02,374 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 23:39:02,374 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:39:02,375 INFO L256 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-27 23:39:02,377 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:39:02,464 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 23:39:02,465 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:39:02,536 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 23:39:02,536 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 14 [2024-11-27 23:39:02,590 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 23:39:02,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736674678] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:39:02,591 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:39:02,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 13 [2024-11-27 23:39:02,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958572370] [2024-11-27 23:39:02,592 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:39:02,593 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-27 23:39:02,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:39:02,593 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-27 23:39:02,593 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2024-11-27 23:39:02,666 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2024-11-27 23:39:02,666 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 81 transitions, 705 flow. Second operand has 14 states, 14 states have (on average 7.5) internal successors, (105), 14 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:39:02,666 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 23:39:02,666 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2024-11-27 23:39:02,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 23:39:03,098 INFO L124 PetriNetUnfolderBase]: 302/607 cut-off events. [2024-11-27 23:39:03,099 INFO L125 PetriNetUnfolderBase]: For 1482/1482 co-relation queries the response was YES. [2024-11-27 23:39:03,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2424 conditions, 607 events. 302/607 cut-off events. For 1482/1482 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 3012 event pairs, 46 based on Foata normal form. 1/606 useless extension candidates. Maximal degree in co-relation 2383. Up to 390 conditions per place. [2024-11-27 23:39:03,105 INFO L140 encePairwiseOnDemand]: 15/24 looper letters, 74 selfloop transitions, 27 changer transitions 1/107 dead transitions. [2024-11-27 23:39:03,105 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 107 transitions, 1027 flow [2024-11-27 23:39:03,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-27 23:39:03,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-27 23:39:03,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 109 transitions. [2024-11-27 23:39:03,107 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4128787878787879 [2024-11-27 23:39:03,108 INFO L175 Difference]: Start difference. First operand has 69 places, 81 transitions, 705 flow. Second operand 11 states and 109 transitions. [2024-11-27 23:39:03,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 107 transitions, 1027 flow [2024-11-27 23:39:03,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 107 transitions, 1017 flow, removed 4 selfloop flow, removed 1 redundant places. [2024-11-27 23:39:03,121 INFO L231 Difference]: Finished difference. Result has 80 places, 87 transitions, 811 flow [2024-11-27 23:39:03,121 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=695, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=811, PETRI_PLACES=80, PETRI_TRANSITIONS=87} [2024-11-27 23:39:03,124 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 55 predicate places. [2024-11-27 23:39:03,125 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 87 transitions, 811 flow [2024-11-27 23:39:03,125 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.5) internal successors, (105), 14 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:39:03,125 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 23:39:03,126 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] [2024-11-27 23:39:03,137 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3890e4aa-a98d-499c-aba5-ded5e1c7ed18/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-27 23:39:03,329 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3890e4aa-a98d-499c-aba5-ded5e1c7ed18/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-27 23:39:03,330 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-27 23:39:03,330 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:39:03,331 INFO L85 PathProgramCache]: Analyzing trace with hash 832257890, now seen corresponding path program 6 times [2024-11-27 23:39:03,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:39:03,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381738032] [2024-11-27 23:39:03,331 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-27 23:39:03,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:39:03,347 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-27 23:39:03,348 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:39:03,770 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 23:39:03,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:39:03,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381738032] [2024-11-27 23:39:03,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381738032] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:39:03,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381381346] [2024-11-27 23:39:03,771 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-27 23:39:03,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:39:03,771 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3890e4aa-a98d-499c-aba5-ded5e1c7ed18/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:39:03,773 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3890e4aa-a98d-499c-aba5-ded5e1c7ed18/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:39:03,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3890e4aa-a98d-499c-aba5-ded5e1c7ed18/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-27 23:39:03,847 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-27 23:39:03,847 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:39:03,848 INFO L256 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-27 23:39:03,850 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:39:03,940 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 23:39:03,940 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:39:04,010 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 23:39:04,010 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 14 [2024-11-27 23:39:04,060 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 23:39:04,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381381346] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:39:04,061 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:39:04,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 5] total 13 [2024-11-27 23:39:04,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648447578] [2024-11-27 23:39:04,061 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:39:04,062 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-27 23:39:04,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:39:04,062 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-27 23:39:04,062 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2024-11-27 23:39:04,119 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2024-11-27 23:39:04,120 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 87 transitions, 811 flow. Second operand has 14 states, 14 states have (on average 7.642857142857143) internal successors, (107), 14 states have internal predecessors, (107), 0 states have call successors, (0), 0 states 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 23:39:04,120 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 23:39:04,121 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2024-11-27 23:39:04,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 23:39:04,588 INFO L124 PetriNetUnfolderBase]: 350/696 cut-off events. [2024-11-27 23:39:04,588 INFO L125 PetriNetUnfolderBase]: For 2123/2123 co-relation queries the response was YES. [2024-11-27 23:39:04,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2938 conditions, 696 events. 350/696 cut-off events. For 2123/2123 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 3555 event pairs, 55 based on Foata normal form. 1/691 useless extension candidates. Maximal degree in co-relation 2892. Up to 402 conditions per place. [2024-11-27 23:39:04,594 INFO L140 encePairwiseOnDemand]: 14/24 looper letters, 73 selfloop transitions, 49 changer transitions 1/128 dead transitions. [2024-11-27 23:39:04,595 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 128 transitions, 1305 flow [2024-11-27 23:39:04,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-27 23:39:04,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-27 23:39:04,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 125 transitions. [2024-11-27 23:39:04,596 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4340277777777778 [2024-11-27 23:39:04,596 INFO L175 Difference]: Start difference. First operand has 80 places, 87 transitions, 811 flow. Second operand 12 states and 125 transitions. [2024-11-27 23:39:04,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 128 transitions, 1305 flow [2024-11-27 23:39:04,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 128 transitions, 1294 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-27 23:39:04,610 INFO L231 Difference]: Finished difference. Result has 89 places, 107 transitions, 1112 flow [2024-11-27 23:39:04,610 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=800, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1112, PETRI_PLACES=89, PETRI_TRANSITIONS=107} [2024-11-27 23:39:04,611 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 64 predicate places. [2024-11-27 23:39:04,611 INFO L471 AbstractCegarLoop]: Abstraction has has 89 places, 107 transitions, 1112 flow [2024-11-27 23:39:04,611 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.642857142857143) internal successors, (107), 14 states have internal predecessors, (107), 0 states have call successors, (0), 0 states 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 23:39:04,611 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 23:39:04,611 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:39:04,622 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3890e4aa-a98d-499c-aba5-ded5e1c7ed18/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-27 23:39:04,812 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3890e4aa-a98d-499c-aba5-ded5e1c7ed18/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:39:04,812 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-27 23:39:04,813 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:39:04,813 INFO L85 PathProgramCache]: Analyzing trace with hash -1178672148, now seen corresponding path program 7 times [2024-11-27 23:39:04,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:39:04,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690014527] [2024-11-27 23:39:04,813 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-27 23:39:04,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:39:04,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:39:04,948 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 23:39:04,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:39:04,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690014527] [2024-11-27 23:39:04,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690014527] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:39:04,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553098109] [2024-11-27 23:39:04,949 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-27 23:39:04,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:39:04,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3890e4aa-a98d-499c-aba5-ded5e1c7ed18/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:39:04,951 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3890e4aa-a98d-499c-aba5-ded5e1c7ed18/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:39:04,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3890e4aa-a98d-499c-aba5-ded5e1c7ed18/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-27 23:39:05,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:39:05,033 INFO L256 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-27 23:39:05,035 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:39:05,115 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 23:39:05,119 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:39:05,191 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 23:39:05,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553098109] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:39:05,191 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:39:05,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-27 23:39:05,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258023988] [2024-11-27 23:39:05,191 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:39:05,192 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-27 23:39:05,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:39:05,192 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-27 23:39:05,192 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2024-11-27 23:39:05,225 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 24 [2024-11-27 23:39:05,225 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 107 transitions, 1112 flow. Second operand has 14 states, 14 states have (on average 6.642857142857143) internal successors, (93), 14 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:39:05,225 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 23:39:05,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 24 [2024-11-27 23:39:05,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 23:39:05,687 INFO L124 PetriNetUnfolderBase]: 790/1497 cut-off events. [2024-11-27 23:39:05,687 INFO L125 PetriNetUnfolderBase]: For 5835/5839 co-relation queries the response was YES. [2024-11-27 23:39:05,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6748 conditions, 1497 events. 790/1497 cut-off events. For 5835/5839 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 8746 event pairs, 336 based on Foata normal form. 54/1549 useless extension candidates. Maximal degree in co-relation 5926. Up to 800 conditions per place. [2024-11-27 23:39:05,702 INFO L140 encePairwiseOnDemand]: 17/24 looper letters, 188 selfloop transitions, 26 changer transitions 0/217 dead transitions. [2024-11-27 23:39:05,702 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 217 transitions, 2671 flow [2024-11-27 23:39:05,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-27 23:39:05,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-27 23:39:05,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 81 transitions. [2024-11-27 23:39:05,704 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.48214285714285715 [2024-11-27 23:39:05,704 INFO L175 Difference]: Start difference. First operand has 89 places, 107 transitions, 1112 flow. Second operand 7 states and 81 transitions. [2024-11-27 23:39:05,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 217 transitions, 2671 flow [2024-11-27 23:39:05,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 217 transitions, 2530 flow, removed 68 selfloop flow, removed 2 redundant places. [2024-11-27 23:39:05,740 INFO L231 Difference]: Finished difference. Result has 97 places, 131 transitions, 1482 flow [2024-11-27 23:39:05,741 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=1050, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1482, PETRI_PLACES=97, PETRI_TRANSITIONS=131} [2024-11-27 23:39:05,742 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 72 predicate places. [2024-11-27 23:39:05,743 INFO L471 AbstractCegarLoop]: Abstraction has has 97 places, 131 transitions, 1482 flow [2024-11-27 23:39:05,744 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.642857142857143) internal successors, (93), 14 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:39:05,744 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 23:39:05,744 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:39:05,754 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3890e4aa-a98d-499c-aba5-ded5e1c7ed18/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-27 23:39:05,947 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3890e4aa-a98d-499c-aba5-ded5e1c7ed18/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:39:05,948 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-27 23:39:05,949 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:39:05,950 INFO L85 PathProgramCache]: Analyzing trace with hash 105133521, now seen corresponding path program 8 times [2024-11-27 23:39:05,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:39:05,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241632032] [2024-11-27 23:39:05,950 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 23:39:05,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:39:05,968 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 23:39:05,968 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:39:06,071 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 23:39:06,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:39:06,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241632032] [2024-11-27 23:39:06,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241632032] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:39:06,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34339412] [2024-11-27 23:39:06,072 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 23:39:06,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:39:06,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3890e4aa-a98d-499c-aba5-ded5e1c7ed18/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:39:06,074 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3890e4aa-a98d-499c-aba5-ded5e1c7ed18/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:39:06,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3890e4aa-a98d-499c-aba5-ded5e1c7ed18/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-27 23:39:06,161 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 23:39:06,161 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:39:06,162 INFO L256 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-27 23:39:06,163 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:39:06,247 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 23:39:06,247 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:39:06,315 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 23:39:06,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34339412] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:39:06,315 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:39:06,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-27 23:39:06,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207743173] [2024-11-27 23:39:06,316 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:39:06,316 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-27 23:39:06,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:39:06,317 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-27 23:39:06,317 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2024-11-27 23:39:06,352 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 24 [2024-11-27 23:39:06,353 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 131 transitions, 1482 flow. Second operand has 14 states, 14 states have (on average 6.642857142857143) internal successors, (93), 14 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:39:06,353 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 23:39:06,353 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 24 [2024-11-27 23:39:06,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 23:39:06,704 INFO L124 PetriNetUnfolderBase]: 679/1303 cut-off events. [2024-11-27 23:39:06,704 INFO L125 PetriNetUnfolderBase]: For 5793/5823 co-relation queries the response was YES. [2024-11-27 23:39:06,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6054 conditions, 1303 events. 679/1303 cut-off events. For 5793/5823 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 7479 event pairs, 317 based on Foata normal form. 50/1352 useless extension candidates. Maximal degree in co-relation 5027. Up to 810 conditions per place. [2024-11-27 23:39:06,714 INFO L140 encePairwiseOnDemand]: 17/24 looper letters, 102 selfloop transitions, 3 changer transitions 77/185 dead transitions. [2024-11-27 23:39:06,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 185 transitions, 2368 flow [2024-11-27 23:39:06,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-27 23:39:06,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-27 23:39:06,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 78 transitions. [2024-11-27 23:39:06,715 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-11-27 23:39:06,715 INFO L175 Difference]: Start difference. First operand has 97 places, 131 transitions, 1482 flow. Second operand 7 states and 78 transitions. [2024-11-27 23:39:06,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 185 transitions, 2368 flow [2024-11-27 23:39:06,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 185 transitions, 2352 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-11-27 23:39:06,738 INFO L231 Difference]: Finished difference. Result has 104 places, 108 transitions, 1146 flow [2024-11-27 23:39:06,738 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=1442, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1146, PETRI_PLACES=104, PETRI_TRANSITIONS=108} [2024-11-27 23:39:06,739 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 79 predicate places. [2024-11-27 23:39:06,739 INFO L471 AbstractCegarLoop]: Abstraction has has 104 places, 108 transitions, 1146 flow [2024-11-27 23:39:06,739 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.642857142857143) internal successors, (93), 14 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:39:06,739 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 23:39:06,739 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:39:06,750 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3890e4aa-a98d-499c-aba5-ded5e1c7ed18/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-27 23:39:06,940 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3890e4aa-a98d-499c-aba5-ded5e1c7ed18/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-27 23:39:06,941 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-27 23:39:06,941 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:39:06,941 INFO L85 PathProgramCache]: Analyzing trace with hash -1282302637, now seen corresponding path program 9 times [2024-11-27 23:39:06,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:39:06,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016047044] [2024-11-27 23:39:06,941 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 23:39:06,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:39:06,957 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-27 23:39:06,957 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:39:07,072 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-27 23:39:07,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:39:07,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016047044] [2024-11-27 23:39:07,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016047044] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:39:07,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596608241] [2024-11-27 23:39:07,072 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 23:39:07,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:39:07,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3890e4aa-a98d-499c-aba5-ded5e1c7ed18/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:39:07,074 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3890e4aa-a98d-499c-aba5-ded5e1c7ed18/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:39:07,077 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3890e4aa-a98d-499c-aba5-ded5e1c7ed18/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-27 23:39:07,164 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-27 23:39:07,165 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:39:07,167 INFO L256 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-27 23:39:07,168 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:39:07,269 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-27 23:39:07,269 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:39:07,362 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-27 23:39:07,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596608241] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:39:07,363 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:39:07,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-27 23:39:07,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007873331] [2024-11-27 23:39:07,364 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:39:07,364 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-27 23:39:07,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:39:07,365 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-27 23:39:07,365 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2024-11-27 23:39:07,395 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 24 [2024-11-27 23:39:07,396 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 108 transitions, 1146 flow. Second operand has 14 states, 14 states have (on average 6.5) internal successors, (91), 14 states have internal predecessors, (91), 0 states have call successors, (0), 0 states 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 23:39:07,396 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 23:39:07,396 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 24 [2024-11-27 23:39:07,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 23:39:07,677 INFO L124 PetriNetUnfolderBase]: 454/821 cut-off events. [2024-11-27 23:39:07,677 INFO L125 PetriNetUnfolderBase]: For 3339/3375 co-relation queries the response was YES. [2024-11-27 23:39:07,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3947 conditions, 821 events. 454/821 cut-off events. For 3339/3375 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 3852 event pairs, 69 based on Foata normal form. 57/877 useless extension candidates. Maximal degree in co-relation 3899. Up to 351 conditions per place. [2024-11-27 23:39:07,685 INFO L140 encePairwiseOnDemand]: 17/24 looper letters, 102 selfloop transitions, 25 changer transitions 0/130 dead transitions. [2024-11-27 23:39:07,686 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 130 transitions, 1547 flow [2024-11-27 23:39:07,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-27 23:39:07,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-27 23:39:07,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 82 transitions. [2024-11-27 23:39:07,688 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.37962962962962965 [2024-11-27 23:39:07,688 INFO L175 Difference]: Start difference. First operand has 104 places, 108 transitions, 1146 flow. Second operand 9 states and 82 transitions. [2024-11-27 23:39:07,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 130 transitions, 1547 flow [2024-11-27 23:39:07,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 130 transitions, 1383 flow, removed 56 selfloop flow, removed 13 redundant places. [2024-11-27 23:39:07,709 INFO L231 Difference]: Finished difference. Result has 95 places, 111 transitions, 1100 flow [2024-11-27 23:39:07,710 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=1000, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1100, PETRI_PLACES=95, PETRI_TRANSITIONS=111} [2024-11-27 23:39:07,711 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 70 predicate places. [2024-11-27 23:39:07,711 INFO L471 AbstractCegarLoop]: Abstraction has has 95 places, 111 transitions, 1100 flow [2024-11-27 23:39:07,712 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.5) internal successors, (91), 14 states have internal predecessors, (91), 0 states have call successors, (0), 0 states 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 23:39:07,712 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 23:39:07,712 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:39:07,721 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3890e4aa-a98d-499c-aba5-ded5e1c7ed18/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-27 23:39:07,912 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3890e4aa-a98d-499c-aba5-ded5e1c7ed18/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-27 23:39:07,912 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-27 23:39:07,913 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:39:07,913 INFO L85 PathProgramCache]: Analyzing trace with hash -2092121778, now seen corresponding path program 10 times [2024-11-27 23:39:07,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:39:07,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921526788] [2024-11-27 23:39:07,913 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-27 23:39:07,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:39:07,923 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-27 23:39:07,923 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:39:07,971 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-27 23:39:07,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:39:07,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921526788] [2024-11-27 23:39:07,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921526788] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:39:07,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:39:07,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-27 23:39:07,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597693826] [2024-11-27 23:39:07,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:39:07,972 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-27 23:39:07,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:39:07,973 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-27 23:39:07,973 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-27 23:39:07,981 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2024-11-27 23:39:07,982 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 111 transitions, 1100 flow. Second operand has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 0 states have call successors, (0), 0 states 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 23:39:07,982 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 23:39:07,983 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2024-11-27 23:39:07,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 23:39:08,311 INFO L124 PetriNetUnfolderBase]: 724/1245 cut-off events. [2024-11-27 23:39:08,311 INFO L125 PetriNetUnfolderBase]: For 3877/3877 co-relation queries the response was YES. [2024-11-27 23:39:08,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5472 conditions, 1245 events. 724/1245 cut-off events. For 3877/3877 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 5731 event pairs, 185 based on Foata normal form. 3/1248 useless extension candidates. Maximal degree in co-relation 5417. Up to 385 conditions per place. [2024-11-27 23:39:08,322 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 138 selfloop transitions, 23 changer transitions 10/172 dead transitions. [2024-11-27 23:39:08,322 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 172 transitions, 1869 flow [2024-11-27 23:39:08,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-27 23:39:08,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-27 23:39:08,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 83 transitions. [2024-11-27 23:39:08,324 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.49404761904761907 [2024-11-27 23:39:08,324 INFO L175 Difference]: Start difference. First operand has 95 places, 111 transitions, 1100 flow. Second operand 7 states and 83 transitions. [2024-11-27 23:39:08,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 172 transitions, 1869 flow [2024-11-27 23:39:08,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 172 transitions, 1847 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-11-27 23:39:08,343 INFO L231 Difference]: Finished difference. Result has 100 places, 114 transitions, 1179 flow [2024-11-27 23:39:08,344 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=1082, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1179, PETRI_PLACES=100, PETRI_TRANSITIONS=114} [2024-11-27 23:39:08,344 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 75 predicate places. [2024-11-27 23:39:08,344 INFO L471 AbstractCegarLoop]: Abstraction has has 100 places, 114 transitions, 1179 flow [2024-11-27 23:39:08,344 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 0 states have call successors, (0), 0 states 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 23:39:08,345 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 23:39:08,345 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:39:08,345 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-27 23:39:08,345 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-27 23:39:08,346 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:39:08,347 INFO L85 PathProgramCache]: Analyzing trace with hash -1031077374, now seen corresponding path program 11 times [2024-11-27 23:39:08,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:39:08,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989128101] [2024-11-27 23:39:08,347 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-27 23:39:08,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:39:08,366 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-27 23:39:08,367 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:39:08,446 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-27 23:39:08,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:39:08,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989128101] [2024-11-27 23:39:08,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989128101] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:39:08,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813125785] [2024-11-27 23:39:08,447 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-27 23:39:08,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:39:08,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3890e4aa-a98d-499c-aba5-ded5e1c7ed18/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:39:08,451 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3890e4aa-a98d-499c-aba5-ded5e1c7ed18/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:39:08,453 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3890e4aa-a98d-499c-aba5-ded5e1c7ed18/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-27 23:39:08,536 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-27 23:39:08,537 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:39:08,538 INFO L256 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-27 23:39:08,540 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:39:08,623 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-27 23:39:08,624 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:39:08,674 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-27 23:39:08,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813125785] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:39:08,674 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:39:08,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2024-11-27 23:39:08,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692181091] [2024-11-27 23:39:08,675 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:39:08,675 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-27 23:39:08,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:39:08,675 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-27 23:39:08,676 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-11-27 23:39:08,679 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2024-11-27 23:39:08,679 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 114 transitions, 1179 flow. Second operand has 10 states, 10 states have (on average 6.2) internal successors, (62), 10 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:39:08,680 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 23:39:08,680 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2024-11-27 23:39:08,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 23:39:09,407 INFO L124 PetriNetUnfolderBase]: 968/1625 cut-off events. [2024-11-27 23:39:09,407 INFO L125 PetriNetUnfolderBase]: For 5895/5895 co-relation queries the response was YES. [2024-11-27 23:39:09,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7534 conditions, 1625 events. 968/1625 cut-off events. For 5895/5895 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 7613 event pairs, 117 based on Foata normal form. 24/1649 useless extension candidates. Maximal degree in co-relation 7479. Up to 560 conditions per place. [2024-11-27 23:39:09,420 INFO L140 encePairwiseOnDemand]: 16/24 looper letters, 219 selfloop transitions, 80 changer transitions 0/300 dead transitions. [2024-11-27 23:39:09,420 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 300 transitions, 3215 flow [2024-11-27 23:39:09,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-27 23:39:09,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-11-27 23:39:09,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 224 transitions. [2024-11-27 23:39:09,423 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.42424242424242425 [2024-11-27 23:39:09,424 INFO L175 Difference]: Start difference. First operand has 100 places, 114 transitions, 1179 flow. Second operand 22 states and 224 transitions. [2024-11-27 23:39:09,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 300 transitions, 3215 flow [2024-11-27 23:39:09,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 300 transitions, 3187 flow, removed 14 selfloop flow, removed 2 redundant places. [2024-11-27 23:39:09,453 INFO L231 Difference]: Finished difference. Result has 131 places, 166 transitions, 1972 flow [2024-11-27 23:39:09,453 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=1175, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1972, PETRI_PLACES=131, PETRI_TRANSITIONS=166} [2024-11-27 23:39:09,453 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 106 predicate places. [2024-11-27 23:39:09,454 INFO L471 AbstractCegarLoop]: Abstraction has has 131 places, 166 transitions, 1972 flow [2024-11-27 23:39:09,454 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.2) internal successors, (62), 10 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:39:09,454 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 23:39:09,454 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:39:09,463 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3890e4aa-a98d-499c-aba5-ded5e1c7ed18/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-27 23:39:09,655 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3890e4aa-a98d-499c-aba5-ded5e1c7ed18/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-27 23:39:09,656 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-27 23:39:09,656 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:39:09,656 INFO L85 PathProgramCache]: Analyzing trace with hash -485127128, now seen corresponding path program 12 times [2024-11-27 23:39:09,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:39:09,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146368882] [2024-11-27 23:39:09,657 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-27 23:39:09,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:39:09,672 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-27 23:39:09,672 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:39:09,767 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-27 23:39:09,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:39:09,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146368882] [2024-11-27 23:39:09,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146368882] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:39:09,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090827614] [2024-11-27 23:39:09,768 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-27 23:39:09,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:39:09,768 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3890e4aa-a98d-499c-aba5-ded5e1c7ed18/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:39:09,770 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3890e4aa-a98d-499c-aba5-ded5e1c7ed18/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:39:09,773 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3890e4aa-a98d-499c-aba5-ded5e1c7ed18/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-27 23:39:09,856 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-27 23:39:09,857 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:39:09,859 INFO L256 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-27 23:39:09,861 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:39:09,948 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-27 23:39:09,950 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:39:10,045 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-27 23:39:10,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090827614] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:39:10,045 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:39:10,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-27 23:39:10,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196440685] [2024-11-27 23:39:10,045 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:39:10,046 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-27 23:39:10,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:39:10,046 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-27 23:39:10,046 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2024-11-27 23:39:10,078 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 24 [2024-11-27 23:39:10,079 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 166 transitions, 1972 flow. Second operand has 14 states, 14 states have (on average 6.571428571428571) internal successors, (92), 14 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:39:10,079 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 23:39:10,079 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 24 [2024-11-27 23:39:10,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 23:39:10,511 INFO L124 PetriNetUnfolderBase]: 636/1139 cut-off events. [2024-11-27 23:39:10,511 INFO L125 PetriNetUnfolderBase]: For 6872/6880 co-relation queries the response was YES. [2024-11-27 23:39:10,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6420 conditions, 1139 events. 636/1139 cut-off events. For 6872/6880 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 5427 event pairs, 84 based on Foata normal form. 46/1184 useless extension candidates. Maximal degree in co-relation 6352. Up to 461 conditions per place. [2024-11-27 23:39:10,524 INFO L140 encePairwiseOnDemand]: 17/24 looper letters, 136 selfloop transitions, 44 changer transitions 0/189 dead transitions. [2024-11-27 23:39:10,524 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 189 transitions, 2539 flow [2024-11-27 23:39:10,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-27 23:39:10,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-27 23:39:10,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 85 transitions. [2024-11-27 23:39:10,525 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.39351851851851855 [2024-11-27 23:39:10,525 INFO L175 Difference]: Start difference. First operand has 131 places, 166 transitions, 1972 flow. Second operand 9 states and 85 transitions. [2024-11-27 23:39:10,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 189 transitions, 2539 flow [2024-11-27 23:39:10,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 189 transitions, 2391 flow, removed 24 selfloop flow, removed 7 redundant places. [2024-11-27 23:39:10,570 INFO L231 Difference]: Finished difference. Result has 131 places, 162 transitions, 1868 flow [2024-11-27 23:39:10,570 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=1780, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1868, PETRI_PLACES=131, PETRI_TRANSITIONS=162} [2024-11-27 23:39:10,571 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 106 predicate places. [2024-11-27 23:39:10,571 INFO L471 AbstractCegarLoop]: Abstraction has has 131 places, 162 transitions, 1868 flow [2024-11-27 23:39:10,571 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.571428571428571) internal successors, (92), 14 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:39:10,571 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 23:39:10,571 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:39:10,582 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3890e4aa-a98d-499c-aba5-ded5e1c7ed18/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-27 23:39:10,772 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3890e4aa-a98d-499c-aba5-ded5e1c7ed18/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-27 23:39:10,772 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-27 23:39:10,773 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:39:10,774 INFO L85 PathProgramCache]: Analyzing trace with hash 1697529476, now seen corresponding path program 13 times [2024-11-27 23:39:10,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:39:10,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319811991] [2024-11-27 23:39:10,774 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-27 23:39:10,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:39:10,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:39:11,729 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:39:11,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:39:11,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319811991] [2024-11-27 23:39:11,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319811991] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:39:11,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478551798] [2024-11-27 23:39:11,729 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-27 23:39:11,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:39:11,730 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3890e4aa-a98d-499c-aba5-ded5e1c7ed18/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:39:11,731 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3890e4aa-a98d-499c-aba5-ded5e1c7ed18/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:39:11,737 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3890e4aa-a98d-499c-aba5-ded5e1c7ed18/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-27 23:39:11,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:39:11,822 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-27 23:39:11,824 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:39:12,068 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-27 23:39:12,068 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:39:12,305 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 23:39:12,305 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 43 [2024-11-27 23:39:12,379 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-27 23:39:12,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478551798] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:39:12,379 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:39:12,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 9] total 27 [2024-11-27 23:39:12,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676516261] [2024-11-27 23:39:12,380 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:39:12,380 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-27 23:39:12,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:39:12,381 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-27 23:39:12,382 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=670, Unknown=0, NotChecked=0, Total=756 [2024-11-27 23:39:12,600 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 24 [2024-11-27 23:39:12,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 162 transitions, 1868 flow. Second operand has 28 states, 28 states have (on average 5.928571428571429) internal successors, (166), 28 states have internal predecessors, (166), 0 states have call successors, (0), 0 states 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 23:39:12,601 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 23:39:12,601 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 24 [2024-11-27 23:39:12,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 23:39:14,250 INFO L124 PetriNetUnfolderBase]: 848/1537 cut-off events. [2024-11-27 23:39:14,251 INFO L125 PetriNetUnfolderBase]: For 7431/7433 co-relation queries the response was YES. [2024-11-27 23:39:14,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8198 conditions, 1537 events. 848/1537 cut-off events. For 7431/7433 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 7940 event pairs, 18 based on Foata normal form. 1/1538 useless extension candidates. Maximal degree in co-relation 8130. Up to 851 conditions per place. [2024-11-27 23:39:14,264 INFO L140 encePairwiseOnDemand]: 13/24 looper letters, 184 selfloop transitions, 90 changer transitions 1/284 dead transitions. [2024-11-27 23:39:14,265 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 284 transitions, 3359 flow [2024-11-27 23:39:14,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-27 23:39:14,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-11-27 23:39:14,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 206 transitions. [2024-11-27 23:39:14,266 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4087301587301587 [2024-11-27 23:39:14,266 INFO L175 Difference]: Start difference. First operand has 131 places, 162 transitions, 1868 flow. Second operand 21 states and 206 transitions. [2024-11-27 23:39:14,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 284 transitions, 3359 flow [2024-11-27 23:39:14,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 284 transitions, 3208 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-11-27 23:39:14,316 INFO L231 Difference]: Finished difference. Result has 150 places, 192 transitions, 2284 flow [2024-11-27 23:39:14,317 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=1762, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2284, PETRI_PLACES=150, PETRI_TRANSITIONS=192} [2024-11-27 23:39:14,318 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 125 predicate places. [2024-11-27 23:39:14,318 INFO L471 AbstractCegarLoop]: Abstraction has has 150 places, 192 transitions, 2284 flow [2024-11-27 23:39:14,319 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 5.928571428571429) internal successors, (166), 28 states have internal predecessors, (166), 0 states have call successors, (0), 0 states 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 23:39:14,319 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 23:39:14,319 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:39:14,329 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3890e4aa-a98d-499c-aba5-ded5e1c7ed18/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-27 23:39:14,522 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3890e4aa-a98d-499c-aba5-ded5e1c7ed18/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-27 23:39:14,523 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-27 23:39:14,524 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:39:14,524 INFO L85 PathProgramCache]: Analyzing trace with hash 2015666026, now seen corresponding path program 14 times [2024-11-27 23:39:14,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:39:14,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365056289] [2024-11-27 23:39:14,524 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 23:39:14,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:39:14,553 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 23:39:14,554 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:39:15,627 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:39:15,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:39:15,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365056289] [2024-11-27 23:39:15,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365056289] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:39:15,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735910323] [2024-11-27 23:39:15,627 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 23:39:15,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:39:15,628 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3890e4aa-a98d-499c-aba5-ded5e1c7ed18/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:39:15,630 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3890e4aa-a98d-499c-aba5-ded5e1c7ed18/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:39:15,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3890e4aa-a98d-499c-aba5-ded5e1c7ed18/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-27 23:39:15,728 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 23:39:15,729 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:39:15,730 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-27 23:39:15,732 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:39:16,119 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-27 23:39:16,119 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:39:16,376 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 23:39:16,376 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 43 [2024-11-27 23:39:16,471 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-27 23:39:16,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735910323] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:39:16,472 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:39:16,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 11, 9] total 34 [2024-11-27 23:39:16,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683807790] [2024-11-27 23:39:16,472 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:39:16,472 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-11-27 23:39:16,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:39:16,473 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-11-27 23:39:16,474 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1050, Unknown=0, NotChecked=0, Total=1190 [2024-11-27 23:39:16,496 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2024-11-27 23:39:16,497 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 192 transitions, 2284 flow. Second operand has 35 states, 35 states have (on average 5.085714285714285) internal successors, (178), 35 states have internal predecessors, (178), 0 states have call successors, (0), 0 states 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 23:39:16,498 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 23:39:16,498 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2024-11-27 23:39:16,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 23:39:19,200 INFO L124 PetriNetUnfolderBase]: 1651/2734 cut-off events. [2024-11-27 23:39:19,200 INFO L125 PetriNetUnfolderBase]: For 14154/14154 co-relation queries the response was YES. [2024-11-27 23:39:19,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14982 conditions, 2734 events. 1651/2734 cut-off events. For 14154/14154 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 14121 event pairs, 81 based on Foata normal form. 1/2735 useless extension candidates. Maximal degree in co-relation 14908. Up to 1450 conditions per place. [2024-11-27 23:39:19,258 INFO L140 encePairwiseOnDemand]: 10/24 looper letters, 226 selfloop transitions, 216 changer transitions 1/444 dead transitions. [2024-11-27 23:39:19,258 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 444 transitions, 5376 flow [2024-11-27 23:39:19,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-11-27 23:39:19,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2024-11-27 23:39:19,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 312 transitions. [2024-11-27 23:39:19,262 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3611111111111111 [2024-11-27 23:39:19,263 INFO L175 Difference]: Start difference. First operand has 150 places, 192 transitions, 2284 flow. Second operand 36 states and 312 transitions. [2024-11-27 23:39:19,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 444 transitions, 5376 flow [2024-11-27 23:39:19,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 444 transitions, 5262 flow, removed 22 selfloop flow, removed 9 redundant places. [2024-11-27 23:39:19,347 INFO L231 Difference]: Finished difference. Result has 191 places, 318 transitions, 4466 flow [2024-11-27 23:39:19,347 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=2198, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=4466, PETRI_PLACES=191, PETRI_TRANSITIONS=318} [2024-11-27 23:39:19,348 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 166 predicate places. [2024-11-27 23:39:19,348 INFO L471 AbstractCegarLoop]: Abstraction has has 191 places, 318 transitions, 4466 flow [2024-11-27 23:39:19,349 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 5.085714285714285) internal successors, (178), 35 states have internal predecessors, (178), 0 states have call successors, (0), 0 states 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 23:39:19,349 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 23:39:19,349 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:39:19,358 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3890e4aa-a98d-499c-aba5-ded5e1c7ed18/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-27 23:39:19,552 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3890e4aa-a98d-499c-aba5-ded5e1c7ed18/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:39:19,553 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-27 23:39:19,558 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:39:19,558 INFO L85 PathProgramCache]: Analyzing trace with hash -1224632918, now seen corresponding path program 15 times [2024-11-27 23:39:19,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:39:19,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095881506] [2024-11-27 23:39:19,558 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 23:39:19,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:39:19,618 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-27 23:39:19,618 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:39:20,468 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:39:20,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:39:20,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095881506] [2024-11-27 23:39:20,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095881506] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:39:20,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457045975] [2024-11-27 23:39:20,468 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 23:39:20,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:39:20,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3890e4aa-a98d-499c-aba5-ded5e1c7ed18/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:39:20,471 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3890e4aa-a98d-499c-aba5-ded5e1c7ed18/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:39:20,473 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3890e4aa-a98d-499c-aba5-ded5e1c7ed18/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-27 23:39:20,555 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-27 23:39:20,555 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:39:20,557 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-27 23:39:20,559 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:39:20,909 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-27 23:39:20,910 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:39:21,171 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 23:39:21,172 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 43 [2024-11-27 23:39:21,283 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-27 23:39:21,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457045975] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:39:21,283 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:39:21,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 11, 9] total 34 [2024-11-27 23:39:21,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984867896] [2024-11-27 23:39:21,283 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:39:21,284 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-11-27 23:39:21,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:39:21,285 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-11-27 23:39:21,285 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1042, Unknown=0, NotChecked=0, Total=1190 [2024-11-27 23:39:21,313 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2024-11-27 23:39:21,313 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 318 transitions, 4466 flow. Second operand has 35 states, 35 states have (on average 5.085714285714285) internal successors, (178), 35 states have internal predecessors, (178), 0 states have call successors, (0), 0 states 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 23:39:21,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 23:39:21,314 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2024-11-27 23:39:21,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 23:39:23,263 INFO L124 PetriNetUnfolderBase]: 1887/3118 cut-off events. [2024-11-27 23:39:23,264 INFO L125 PetriNetUnfolderBase]: For 23748/23748 co-relation queries the response was YES. [2024-11-27 23:39:23,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20133 conditions, 3118 events. 1887/3118 cut-off events. For 23748/23748 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 16575 event pairs, 116 based on Foata normal form. 1/3119 useless extension candidates. Maximal degree in co-relation 20044. Up to 1797 conditions per place. [2024-11-27 23:39:23,295 INFO L140 encePairwiseOnDemand]: 12/24 looper letters, 297 selfloop transitions, 182 changer transitions 1/481 dead transitions. [2024-11-27 23:39:23,295 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 481 transitions, 7075 flow [2024-11-27 23:39:23,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-27 23:39:23,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-11-27 23:39:23,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 223 transitions. [2024-11-27 23:39:23,297 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.37166666666666665 [2024-11-27 23:39:23,297 INFO L175 Difference]: Start difference. First operand has 191 places, 318 transitions, 4466 flow. Second operand 25 states and 223 transitions. [2024-11-27 23:39:23,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 481 transitions, 7075 flow [2024-11-27 23:39:23,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 481 transitions, 6650 flow, removed 131 selfloop flow, removed 12 redundant places. [2024-11-27 23:39:23,471 INFO L231 Difference]: Finished difference. Result has 214 places, 367 transitions, 5408 flow [2024-11-27 23:39:23,472 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=4095, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=5408, PETRI_PLACES=214, PETRI_TRANSITIONS=367} [2024-11-27 23:39:23,472 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 189 predicate places. [2024-11-27 23:39:23,472 INFO L471 AbstractCegarLoop]: Abstraction has has 214 places, 367 transitions, 5408 flow [2024-11-27 23:39:23,472 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 5.085714285714285) internal successors, (178), 35 states have internal predecessors, (178), 0 states have call successors, (0), 0 states 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 23:39:23,472 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 23:39:23,473 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:39:23,482 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3890e4aa-a98d-499c-aba5-ded5e1c7ed18/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-27 23:39:23,676 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3890e4aa-a98d-499c-aba5-ded5e1c7ed18/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:39:23,677 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-27 23:39:23,677 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:39:23,677 INFO L85 PathProgramCache]: Analyzing trace with hash 381547744, now seen corresponding path program 16 times [2024-11-27 23:39:23,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:39:23,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606743792] [2024-11-27 23:39:23,677 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-27 23:39:23,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:39:23,702 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-27 23:39:23,702 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:39:24,528 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:39:24,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:39:24,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606743792] [2024-11-27 23:39:24,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606743792] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:39:24,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525291125] [2024-11-27 23:39:24,529 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-27 23:39:24,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:39:24,529 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3890e4aa-a98d-499c-aba5-ded5e1c7ed18/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:39:24,531 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3890e4aa-a98d-499c-aba5-ded5e1c7ed18/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:39:24,533 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3890e4aa-a98d-499c-aba5-ded5e1c7ed18/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-27 23:39:24,618 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-27 23:39:24,619 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:39:24,620 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-27 23:39:24,623 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:39:24,900 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-27 23:39:24,900 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:39:25,184 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 23:39:25,185 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 43 [2024-11-27 23:39:25,267 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-27 23:39:25,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525291125] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:39:25,267 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:39:25,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9, 9] total 27 [2024-11-27 23:39:25,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276968786] [2024-11-27 23:39:25,268 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:39:25,268 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-27 23:39:25,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:39:25,269 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-27 23:39:25,269 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=678, Unknown=0, NotChecked=0, Total=756 [2024-11-27 23:39:25,649 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 24 [2024-11-27 23:39:25,649 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 367 transitions, 5408 flow. Second operand has 28 states, 28 states have (on average 5.892857142857143) internal successors, (165), 28 states have internal predecessors, (165), 0 states have call successors, (0), 0 states 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 23:39:25,649 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 23:39:25,649 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 24 [2024-11-27 23:39:25,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 23:39:28,504 INFO L124 PetriNetUnfolderBase]: 2844/4833 cut-off events. [2024-11-27 23:39:28,504 INFO L125 PetriNetUnfolderBase]: For 42072/42301 co-relation queries the response was YES. [2024-11-27 23:39:28,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33623 conditions, 4833 events. 2844/4833 cut-off events. For 42072/42301 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 29502 event pairs, 110 based on Foata normal form. 112/4916 useless extension candidates. Maximal degree in co-relation 31479. Up to 2609 conditions per place. [2024-11-27 23:39:28,558 INFO L140 encePairwiseOnDemand]: 12/24 looper letters, 502 selfloop transitions, 263 changer transitions 6/806 dead transitions. [2024-11-27 23:39:28,558 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 806 transitions, 12256 flow [2024-11-27 23:39:28,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-11-27 23:39:28,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2024-11-27 23:39:28,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 370 transitions. [2024-11-27 23:39:28,561 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4057017543859649 [2024-11-27 23:39:28,561 INFO L175 Difference]: Start difference. First operand has 214 places, 367 transitions, 5408 flow. Second operand 38 states and 370 transitions. [2024-11-27 23:39:28,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 806 transitions, 12256 flow [2024-11-27 23:39:28,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 806 transitions, 12075 flow, removed 81 selfloop flow, removed 5 redundant places. [2024-11-27 23:39:28,928 INFO L231 Difference]: Finished difference. Result has 262 places, 584 transitions, 9323 flow [2024-11-27 23:39:28,928 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=5312, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=9323, PETRI_PLACES=262, PETRI_TRANSITIONS=584} [2024-11-27 23:39:28,929 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 237 predicate places. [2024-11-27 23:39:28,929 INFO L471 AbstractCegarLoop]: Abstraction has has 262 places, 584 transitions, 9323 flow [2024-11-27 23:39:28,929 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 5.892857142857143) internal successors, (165), 28 states have internal predecessors, (165), 0 states have call successors, (0), 0 states 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 23:39:28,929 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 23:39:28,929 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:39:28,940 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3890e4aa-a98d-499c-aba5-ded5e1c7ed18/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-27 23:39:29,133 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3890e4aa-a98d-499c-aba5-ded5e1c7ed18/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:39:29,134 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-27 23:39:29,135 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:39:29,135 INFO L85 PathProgramCache]: Analyzing trace with hash 499314032, now seen corresponding path program 17 times [2024-11-27 23:39:29,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:39:29,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446796017] [2024-11-27 23:39:29,136 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-27 23:39:29,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:39:29,171 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 23:39:29,172 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:39:29,806 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:39:29,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:39:29,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446796017] [2024-11-27 23:39:29,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446796017] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:39:29,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835378671] [2024-11-27 23:39:29,808 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-27 23:39:29,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:39:29,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3890e4aa-a98d-499c-aba5-ded5e1c7ed18/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:39:29,810 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3890e4aa-a98d-499c-aba5-ded5e1c7ed18/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:39:29,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3890e4aa-a98d-499c-aba5-ded5e1c7ed18/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-27 23:39:29,897 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 23:39:29,897 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:39:29,899 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-27 23:39:29,902 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:39:30,086 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-27 23:39:30,086 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:39:30,179 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 23:39:30,180 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 43 [2024-11-27 23:39:30,249 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-27 23:39:30,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835378671] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:39:30,250 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:39:30,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 17 [2024-11-27 23:39:30,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602186009] [2024-11-27 23:39:30,250 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:39:30,250 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-27 23:39:30,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:39:30,251 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-27 23:39:30,251 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2024-11-27 23:39:30,378 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2024-11-27 23:39:30,378 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 584 transitions, 9323 flow. Second operand has 18 states, 18 states have (on average 6.833333333333333) internal successors, (123), 18 states have internal predecessors, (123), 0 states have call successors, (0), 0 states 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 23:39:30,378 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 23:39:30,378 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2024-11-27 23:39:30,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 23:39:31,844 INFO L124 PetriNetUnfolderBase]: 2625/4653 cut-off events. [2024-11-27 23:39:31,845 INFO L125 PetriNetUnfolderBase]: For 55532/55793 co-relation queries the response was YES. [2024-11-27 23:39:31,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35945 conditions, 4653 events. 2625/4653 cut-off events. For 55532/55793 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 30096 event pairs, 152 based on Foata normal form. 119/4735 useless extension candidates. Maximal degree in co-relation 34663. Up to 3254 conditions per place. [2024-11-27 23:39:31,886 INFO L140 encePairwiseOnDemand]: 15/24 looper letters, 427 selfloop transitions, 139 changer transitions 4/647 dead transitions. [2024-11-27 23:39:31,886 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 647 transitions, 11097 flow [2024-11-27 23:39:31,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-27 23:39:31,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-11-27 23:39:31,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 154 transitions. [2024-11-27 23:39:31,888 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.42777777777777776 [2024-11-27 23:39:31,888 INFO L175 Difference]: Start difference. First operand has 262 places, 584 transitions, 9323 flow. Second operand 15 states and 154 transitions. [2024-11-27 23:39:31,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 647 transitions, 11097 flow [2024-11-27 23:39:32,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 647 transitions, 10883 flow, removed 94 selfloop flow, removed 4 redundant places. [2024-11-27 23:39:32,270 INFO L231 Difference]: Finished difference. Result has 274 places, 602 transitions, 9790 flow [2024-11-27 23:39:32,271 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=9113, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=584, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=449, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=9790, PETRI_PLACES=274, PETRI_TRANSITIONS=602} [2024-11-27 23:39:32,271 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 249 predicate places. [2024-11-27 23:39:32,271 INFO L471 AbstractCegarLoop]: Abstraction has has 274 places, 602 transitions, 9790 flow [2024-11-27 23:39:32,271 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 6.833333333333333) internal successors, (123), 18 states have internal predecessors, (123), 0 states have call successors, (0), 0 states 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 23:39:32,271 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 23:39:32,271 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:39:32,277 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3890e4aa-a98d-499c-aba5-ded5e1c7ed18/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-11-27 23:39:32,472 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3890e4aa-a98d-499c-aba5-ded5e1c7ed18/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:39:32,472 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-27 23:39:32,472 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:39:32,473 INFO L85 PathProgramCache]: Analyzing trace with hash 1694717242, now seen corresponding path program 18 times [2024-11-27 23:39:32,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:39:32,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694026646] [2024-11-27 23:39:32,473 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-27 23:39:32,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:39:32,524 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-27 23:39:32,527 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:39:33,306 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-27 23:39:33,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:39:33,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694026646] [2024-11-27 23:39:33,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694026646] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:39:33,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457352719] [2024-11-27 23:39:33,307 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-27 23:39:33,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:39:33,308 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3890e4aa-a98d-499c-aba5-ded5e1c7ed18/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:39:33,311 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3890e4aa-a98d-499c-aba5-ded5e1c7ed18/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:39:33,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3890e4aa-a98d-499c-aba5-ded5e1c7ed18/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-27 23:39:33,412 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-27 23:39:33,412 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:39:33,414 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-11-27 23:39:33,416 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:39:33,483 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-27 23:39:33,883 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 23:39:33,883 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 14 [2024-11-27 23:39:33,955 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:39:33,955 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:39:38,662 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-27 23:39:38,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457352719] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:39:38,662 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:39:38,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 12] total 32 [2024-11-27 23:39:38,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049750640] [2024-11-27 23:39:38,663 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:39:38,663 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-27 23:39:38,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:39:38,664 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-27 23:39:38,664 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=884, Unknown=1, NotChecked=0, Total=1056 [2024-11-27 23:39:38,750 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2024-11-27 23:39:38,750 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 602 transitions, 9790 flow. Second operand has 33 states, 33 states have (on average 4.848484848484849) internal successors, (160), 33 states have internal predecessors, (160), 0 states have call successors, (0), 0 states 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 23:39:38,750 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 23:39:38,750 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2024-11-27 23:39:38,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 23:39:44,077 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-27 23:39:50,143 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-27 23:39:54,151 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-27 23:39:58,426 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-27 23:40:02,447 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-27 23:40:06,459 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-27 23:40:14,651 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-27 23:40:18,674 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-27 23:40:22,689 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-27 23:40:28,386 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-27 23:40:36,466 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-27 23:40:41,095 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-27 23:40:49,202 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-27 23:40:53,235 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-27 23:40:54,494 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-27 23:40:56,800 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-27 23:41:00,814 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-27 23:41:04,837 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-27 23:41:08,848 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-27 23:41:12,857 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-27 23:41:17,405 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-27 23:41:21,431 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-27 23:41:25,509 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-27 23:41:29,538 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-27 23:41:34,041 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-27 23:41:38,052 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-27 23:41:40,201 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-27 23:41:44,209 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-27 23:41:48,217 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-27 23:42:00,465 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-27 23:42:04,523 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-27 23:42:09,279 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-27 23:42:18,434 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-27 23:42:22,445 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-27 23:42:27,514 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-27 23:42:31,796 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-27 23:42:36,317 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-27 23:42:40,329 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-27 23:42:44,521 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-27 23:42:48,740 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.20s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-27 23:42:52,755 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-27 23:42:53,477 INFO L124 PetriNetUnfolderBase]: 4882/7943 cut-off events. [2024-11-27 23:42:53,477 INFO L125 PetriNetUnfolderBase]: For 88799/88799 co-relation queries the response was YES. [2024-11-27 23:42:53,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60099 conditions, 7943 events. 4882/7943 cut-off events. For 88799/88799 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 49308 event pairs, 143 based on Foata normal form. 1/7944 useless extension candidates. Maximal degree in co-relation 58520. Up to 4381 conditions per place. [2024-11-27 23:42:53,565 INFO L140 encePairwiseOnDemand]: 10/24 looper letters, 521 selfloop transitions, 735 changer transitions 4/1261 dead transitions. [2024-11-27 23:42:53,565 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 1261 transitions, 21412 flow [2024-11-27 23:42:53,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2024-11-27 23:42:53,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2024-11-27 23:42:53,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 531 transitions. [2024-11-27 23:42:53,568 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.31607142857142856 [2024-11-27 23:42:53,568 INFO L175 Difference]: Start difference. First operand has 274 places, 602 transitions, 9790 flow. Second operand 70 states and 531 transitions. [2024-11-27 23:42:53,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 1261 transitions, 21412 flow [2024-11-27 23:42:54,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 1261 transitions, 21144 flow, removed 26 selfloop flow, removed 13 redundant places. [2024-11-27 23:42:54,244 INFO L231 Difference]: Finished difference. Result has 356 places, 1080 transitions, 19786 flow [2024-11-27 23:42:54,245 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=9598, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=602, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=320, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=70, PETRI_FLOW=19786, PETRI_PLACES=356, PETRI_TRANSITIONS=1080} [2024-11-27 23:42:54,245 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 331 predicate places. [2024-11-27 23:42:54,246 INFO L471 AbstractCegarLoop]: Abstraction has has 356 places, 1080 transitions, 19786 flow [2024-11-27 23:42:54,246 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 4.848484848484849) internal successors, (160), 33 states have internal predecessors, (160), 0 states have call successors, (0), 0 states 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 23:42:54,246 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 23:42:54,246 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:42:54,256 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3890e4aa-a98d-499c-aba5-ded5e1c7ed18/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-11-27 23:42:54,446 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3890e4aa-a98d-499c-aba5-ded5e1c7ed18/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-11-27 23:42:54,446 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-27 23:42:54,447 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:42:54,447 INFO L85 PathProgramCache]: Analyzing trace with hash 561821202, now seen corresponding path program 19 times [2024-11-27 23:42:54,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:42:54,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567318221] [2024-11-27 23:42:54,447 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-27 23:42:54,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:42:54,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:42:55,552 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:42:55,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:42:55,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567318221] [2024-11-27 23:42:55,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567318221] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:42:55,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950125059] [2024-11-27 23:42:55,553 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-27 23:42:55,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:42:55,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3890e4aa-a98d-499c-aba5-ded5e1c7ed18/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:42:55,554 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3890e4aa-a98d-499c-aba5-ded5e1c7ed18/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:42:55,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3890e4aa-a98d-499c-aba5-ded5e1c7ed18/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-27 23:42:55,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:42:55,635 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-27 23:42:55,636 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:42:55,905 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-27 23:42:55,905 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:42:56,207 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 23:42:56,207 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 43 [2024-11-27 23:42:56,283 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-27 23:42:56,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950125059] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:42:56,283 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:42:56,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 9] total 28 [2024-11-27 23:42:56,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800210060] [2024-11-27 23:42:56,284 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:42:56,284 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-27 23:42:56,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:42:56,284 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-27 23:42:56,285 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=717, Unknown=0, NotChecked=0, Total=812 [2024-11-27 23:42:56,472 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2024-11-27 23:42:56,473 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 1080 transitions, 19786 flow. Second operand has 29 states, 29 states have (on average 5.0344827586206895) internal successors, (146), 29 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:42:56,473 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 23:42:56,473 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2024-11-27 23:42:56,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 23:43:02,237 INFO L124 PetriNetUnfolderBase]: 5261/8559 cut-off events. [2024-11-27 23:43:02,237 INFO L125 PetriNetUnfolderBase]: For 120953/120953 co-relation queries the response was YES. [2024-11-27 23:43:02,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73041 conditions, 8559 events. 5261/8559 cut-off events. For 120953/120953 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 53819 event pairs, 171 based on Foata normal form. 1/8560 useless extension candidates. Maximal degree in co-relation 72586. Up to 5457 conditions per place. [2024-11-27 23:43:02,354 INFO L140 encePairwiseOnDemand]: 11/24 looper letters, 746 selfloop transitions, 640 changer transitions 1/1388 dead transitions. [2024-11-27 23:43:02,355 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 1388 transitions, 27096 flow [2024-11-27 23:43:02,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-11-27 23:43:02,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2024-11-27 23:43:02,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 305 transitions. [2024-11-27 23:43:02,356 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.34346846846846846 [2024-11-27 23:43:02,356 INFO L175 Difference]: Start difference. First operand has 356 places, 1080 transitions, 19786 flow. Second operand 37 states and 305 transitions. [2024-11-27 23:43:02,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 1388 transitions, 27096 flow [2024-11-27 23:43:04,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 1388 transitions, 25561 flow, removed 720 selfloop flow, removed 8 redundant places. [2024-11-27 23:43:04,202 INFO L231 Difference]: Finished difference. Result has 394 places, 1220 transitions, 23325 flow [2024-11-27 23:43:04,202 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=18340, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1080, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=521, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=504, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=23325, PETRI_PLACES=394, PETRI_TRANSITIONS=1220} [2024-11-27 23:43:04,203 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 369 predicate places. [2024-11-27 23:43:04,203 INFO L471 AbstractCegarLoop]: Abstraction has has 394 places, 1220 transitions, 23325 flow [2024-11-27 23:43:04,203 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 5.0344827586206895) internal successors, (146), 29 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:43:04,203 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 23:43:04,203 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:43:04,211 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3890e4aa-a98d-499c-aba5-ded5e1c7ed18/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-11-27 23:43:04,404 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3890e4aa-a98d-499c-aba5-ded5e1c7ed18/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-11-27 23:43:04,404 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-27 23:43:04,405 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:43:04,405 INFO L85 PathProgramCache]: Analyzing trace with hash 805487796, now seen corresponding path program 20 times [2024-11-27 23:43:04,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:43:04,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528070350] [2024-11-27 23:43:04,406 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 23:43:04,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:43:04,432 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 23:43:04,432 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:43:05,264 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:43:05,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:43:05,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528070350] [2024-11-27 23:43:05,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528070350] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:43:05,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752924747] [2024-11-27 23:43:05,264 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 23:43:05,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:43:05,264 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3890e4aa-a98d-499c-aba5-ded5e1c7ed18/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:43:05,268 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3890e4aa-a98d-499c-aba5-ded5e1c7ed18/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:43:05,269 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3890e4aa-a98d-499c-aba5-ded5e1c7ed18/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-27 23:43:05,355 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 23:43:05,355 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:43:05,356 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-27 23:43:05,357 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:43:05,628 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 23:43:05,628 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:43:05,897 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 23:43:05,897 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 43 [2024-11-27 23:43:05,994 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-27 23:43:05,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752924747] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:43:05,994 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:43:05,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 9] total 22 [2024-11-27 23:43:05,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157444606] [2024-11-27 23:43:05,994 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:43:05,995 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-27 23:43:05,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:43:05,995 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-27 23:43:05,996 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2024-11-27 23:43:06,258 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2024-11-27 23:43:06,258 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 1220 transitions, 23325 flow. Second operand has 23 states, 23 states have (on average 6.956521739130435) internal successors, (160), 23 states have internal predecessors, (160), 0 states have call successors, (0), 0 states 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 23:43:06,258 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 23:43:06,258 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2024-11-27 23:43:06,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 23:43:10,346 INFO L124 PetriNetUnfolderBase]: 4357/7609 cut-off events. [2024-11-27 23:43:10,346 INFO L125 PetriNetUnfolderBase]: For 140911/141069 co-relation queries the response was YES. [2024-11-27 23:43:10,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70768 conditions, 7609 events. 4357/7609 cut-off events. For 140911/141069 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 52456 event pairs, 162 based on Foata normal form. 81/7657 useless extension candidates. Maximal degree in co-relation 70359. Up to 5605 conditions per place. [2024-11-27 23:43:10,539 INFO L140 encePairwiseOnDemand]: 14/24 looper letters, 997 selfloop transitions, 143 changer transitions 1/1293 dead transitions. [2024-11-27 23:43:10,540 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 1293 transitions, 26579 flow [2024-11-27 23:43:10,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-27 23:43:10,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-27 23:43:10,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 137 transitions. [2024-11-27 23:43:10,541 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4391025641025641 [2024-11-27 23:43:10,541 INFO L175 Difference]: Start difference. First operand has 394 places, 1220 transitions, 23325 flow. Second operand 13 states and 137 transitions. [2024-11-27 23:43:10,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 1293 transitions, 26579 flow [2024-11-27 23:43:12,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 1293 transitions, 25919 flow, removed 266 selfloop flow, removed 14 redundant places. [2024-11-27 23:43:12,341 INFO L231 Difference]: Finished difference. Result has 395 places, 1243 transitions, 23592 flow [2024-11-27 23:43:12,342 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=22665, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1081, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=23592, PETRI_PLACES=395, PETRI_TRANSITIONS=1243} [2024-11-27 23:43:12,342 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 370 predicate places. [2024-11-27 23:43:12,342 INFO L471 AbstractCegarLoop]: Abstraction has has 395 places, 1243 transitions, 23592 flow [2024-11-27 23:43:12,343 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 6.956521739130435) internal successors, (160), 23 states have internal predecessors, (160), 0 states have call successors, (0), 0 states 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 23:43:12,343 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 23:43:12,343 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:43:12,350 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3890e4aa-a98d-499c-aba5-ded5e1c7ed18/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-11-27 23:43:12,543 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3890e4aa-a98d-499c-aba5-ded5e1c7ed18/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-11-27 23:43:12,543 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-27 23:43:12,544 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:43:12,544 INFO L85 PathProgramCache]: Analyzing trace with hash 1519263732, now seen corresponding path program 21 times [2024-11-27 23:43:12,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:43:12,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610666939] [2024-11-27 23:43:12,544 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 23:43:12,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:43:12,559 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-11-27 23:43:12,559 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:43:13,202 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-27 23:43:13,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:43:13,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610666939] [2024-11-27 23:43:13,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610666939] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:43:13,203 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:43:13,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2024-11-27 23:43:13,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072544015] [2024-11-27 23:43:13,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:43:13,204 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-27 23:43:13,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:43:13,204 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-27 23:43:13,204 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2024-11-27 23:43:13,226 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2024-11-27 23:43:13,226 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 1243 transitions, 23592 flow. Second operand has 15 states, 15 states have (on average 4.733333333333333) internal successors, (71), 15 states have internal predecessors, (71), 0 states have call successors, (0), 0 states 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 23:43:13,226 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 23:43:13,226 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2024-11-27 23:43:13,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 23:43:18,375 INFO L124 PetriNetUnfolderBase]: 5590/9111 cut-off events. [2024-11-27 23:43:18,375 INFO L125 PetriNetUnfolderBase]: For 150977/150977 co-relation queries the response was YES. [2024-11-27 23:43:18,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81770 conditions, 9111 events. 5590/9111 cut-off events. For 150977/150977 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 57970 event pairs, 182 based on Foata normal form. 1/9112 useless extension candidates. Maximal degree in co-relation 81324. Up to 6430 conditions per place. [2024-11-27 23:43:18,552 INFO L140 encePairwiseOnDemand]: 12/24 looper letters, 804 selfloop transitions, 601 changer transitions 4/1410 dead transitions. [2024-11-27 23:43:18,552 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 416 places, 1410 transitions, 28832 flow [2024-11-27 23:43:18,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-27 23:43:18,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-11-27 23:43:18,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 192 transitions. [2024-11-27 23:43:18,553 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.36363636363636365 [2024-11-27 23:43:18,553 INFO L175 Difference]: Start difference. First operand has 395 places, 1243 transitions, 23592 flow. Second operand 22 states and 192 transitions. [2024-11-27 23:43:18,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 416 places, 1410 transitions, 28832 flow [2024-11-27 23:43:20,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 1410 transitions, 28644 flow, removed 43 selfloop flow, removed 8 redundant places. [2024-11-27 23:43:20,432 INFO L231 Difference]: Finished difference. Result has 417 places, 1301 transitions, 26924 flow [2024-11-27 23:43:20,433 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=23412, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=546, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=659, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=26924, PETRI_PLACES=417, PETRI_TRANSITIONS=1301} [2024-11-27 23:43:20,434 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 392 predicate places. [2024-11-27 23:43:20,434 INFO L471 AbstractCegarLoop]: Abstraction has has 417 places, 1301 transitions, 26924 flow [2024-11-27 23:43:20,434 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.733333333333333) internal successors, (71), 15 states have internal predecessors, (71), 0 states have call successors, (0), 0 states 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 23:43:20,434 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 23:43:20,434 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:43:20,434 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-11-27 23:43:20,434 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-27 23:43:20,435 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:43:20,435 INFO L85 PathProgramCache]: Analyzing trace with hash -1968157384, now seen corresponding path program 22 times [2024-11-27 23:43:20,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:43:20,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538279637] [2024-11-27 23:43:20,435 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-27 23:43:20,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:43:20,460 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-27 23:43:20,460 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:43:21,618 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:43:21,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:43:21,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538279637] [2024-11-27 23:43:21,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538279637] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:43:21,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478767630] [2024-11-27 23:43:21,619 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-27 23:43:21,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:43:21,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3890e4aa-a98d-499c-aba5-ded5e1c7ed18/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:43:21,621 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3890e4aa-a98d-499c-aba5-ded5e1c7ed18/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:43:21,624 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3890e4aa-a98d-499c-aba5-ded5e1c7ed18/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-27 23:43:21,717 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-27 23:43:21,717 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:43:21,719 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-27 23:43:21,720 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:43:22,087 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-27 23:43:22,087 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:43:22,453 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 23:43:22,453 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 43 [2024-11-27 23:43:22,527 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-27 23:43:22,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478767630] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:43:22,528 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:43:22,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9, 9] total 27 [2024-11-27 23:43:22,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451446041] [2024-11-27 23:43:22,528 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:43:22,528 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-27 23:43:22,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:43:22,529 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-27 23:43:22,529 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=676, Unknown=0, NotChecked=0, Total=756 [2024-11-27 23:43:23,027 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 24 [2024-11-27 23:43:23,027 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 1301 transitions, 26924 flow. Second operand has 28 states, 28 states have (on average 5.785714285714286) internal successors, (162), 28 states have internal predecessors, (162), 0 states have call successors, (0), 0 states 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 23:43:23,027 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 23:43:23,027 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 24 [2024-11-27 23:43:23,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 23:43:34,196 INFO L124 PetriNetUnfolderBase]: 7767/12782 cut-off events. [2024-11-27 23:43:34,196 INFO L125 PetriNetUnfolderBase]: For 291908/292452 co-relation queries the response was YES. [2024-11-27 23:43:34,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 128524 conditions, 12782 events. 7767/12782 cut-off events. For 291908/292452 co-relation queries the response was YES. Maximal size of possible extension queue 539. Compared 85885 event pairs, 217 based on Foata normal form. 342/13082 useless extension candidates. Maximal degree in co-relation 128201. Up to 6988 conditions per place. [2024-11-27 23:43:34,378 INFO L140 encePairwiseOnDemand]: 10/24 looper letters, 1178 selfloop transitions, 1009 changer transitions 7/2298 dead transitions. [2024-11-27 23:43:34,379 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 478 places, 2298 transitions, 49672 flow [2024-11-27 23:43:34,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2024-11-27 23:43:34,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2024-11-27 23:43:34,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 570 transitions. [2024-11-27 23:43:34,380 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.38306451612903225 [2024-11-27 23:43:34,380 INFO L175 Difference]: Start difference. First operand has 417 places, 1301 transitions, 26924 flow. Second operand 62 states and 570 transitions. [2024-11-27 23:43:34,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 478 places, 2298 transitions, 49672 flow [2024-11-27 23:43:37,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 472 places, 2298 transitions, 49428 flow, removed 62 selfloop flow, removed 6 redundant places. [2024-11-27 23:43:37,527 INFO L231 Difference]: Finished difference. Result has 496 places, 2057 transitions, 46316 flow [2024-11-27 23:43:37,529 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=26728, PETRI_DIFFERENCE_MINUEND_PLACES=411, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=401, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=726, PETRI_DIFFERENCE_SUBTRAHEND_STATES=62, PETRI_FLOW=46316, PETRI_PLACES=496, PETRI_TRANSITIONS=2057} [2024-11-27 23:43:37,529 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 471 predicate places. [2024-11-27 23:43:37,529 INFO L471 AbstractCegarLoop]: Abstraction has has 496 places, 2057 transitions, 46316 flow [2024-11-27 23:43:37,530 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 5.785714285714286) internal successors, (162), 28 states have internal predecessors, (162), 0 states have call successors, (0), 0 states 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 23:43:37,530 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 23:43:37,530 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:43:37,539 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3890e4aa-a98d-499c-aba5-ded5e1c7ed18/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-11-27 23:43:37,734 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3890e4aa-a98d-499c-aba5-ded5e1c7ed18/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-11-27 23:43:37,734 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-27 23:43:37,734 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:43:37,734 INFO L85 PathProgramCache]: Analyzing trace with hash 653054474, now seen corresponding path program 23 times [2024-11-27 23:43:37,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:43:37,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225307827] [2024-11-27 23:43:37,735 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-27 23:43:37,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:43:37,749 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 23:43:37,749 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:43:38,756 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:43:38,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:43:38,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225307827] [2024-11-27 23:43:38,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225307827] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:43:38,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545186360] [2024-11-27 23:43:38,757 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-27 23:43:38,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:43:38,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3890e4aa-a98d-499c-aba5-ded5e1c7ed18/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:43:38,760 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3890e4aa-a98d-499c-aba5-ded5e1c7ed18/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:43:38,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3890e4aa-a98d-499c-aba5-ded5e1c7ed18/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-27 23:43:38,848 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 23:43:38,849 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:43:38,850 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-27 23:43:38,851 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:43:39,343 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 23:43:39,343 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:43:39,690 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 23:43:39,691 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 43 [2024-11-27 23:43:39,796 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-27 23:43:39,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545186360] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:43:39,796 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:43:39,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 9] total 31 [2024-11-27 23:43:39,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264390308] [2024-11-27 23:43:39,797 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:43:39,797 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-27 23:43:39,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:43:39,798 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-27 23:43:39,798 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=860, Unknown=0, NotChecked=0, Total=992 [2024-11-27 23:43:39,827 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2024-11-27 23:43:39,828 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 496 places, 2057 transitions, 46316 flow. Second operand has 32 states, 32 states have (on average 5.125) internal successors, (164), 32 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:43:39,828 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 23:43:39,828 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2024-11-27 23:43:39,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 23:43:54,636 INFO L124 PetriNetUnfolderBase]: 9824/15852 cut-off events. [2024-11-27 23:43:54,636 INFO L125 PetriNetUnfolderBase]: For 442974/442974 co-relation queries the response was YES. [2024-11-27 23:43:54,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 170809 conditions, 15852 events. 9824/15852 cut-off events. For 442974/442974 co-relation queries the response was YES. Maximal size of possible extension queue 601. Compared 105865 event pairs, 227 based on Foata normal form. 4/15856 useless extension candidates. Maximal degree in co-relation 170463. Up to 10429 conditions per place. [2024-11-27 23:43:54,973 INFO L140 encePairwiseOnDemand]: 10/24 looper letters, 1540 selfloop transitions, 1102 changer transitions 16/2659 dead transitions. [2024-11-27 23:43:54,973 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 531 places, 2659 transitions, 65097 flow [2024-11-27 23:43:54,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-11-27 23:43:54,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2024-11-27 23:43:54,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 316 transitions. [2024-11-27 23:43:54,975 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.36574074074074076 [2024-11-27 23:43:54,975 INFO L175 Difference]: Start difference. First operand has 496 places, 2057 transitions, 46316 flow. Second operand 36 states and 316 transitions. [2024-11-27 23:43:54,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 531 places, 2659 transitions, 65097 flow [2024-11-27 23:44:02,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 525 places, 2659 transitions, 61510 flow, removed 1751 selfloop flow, removed 6 redundant places. [2024-11-27 23:44:02,684 INFO L231 Difference]: Finished difference. Result has 537 places, 2393 transitions, 56313 flow [2024-11-27 23:44:02,686 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=43521, PETRI_DIFFERENCE_MINUEND_PLACES=490, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2057, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=806, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1073, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=56313, PETRI_PLACES=537, PETRI_TRANSITIONS=2393} [2024-11-27 23:44:02,687 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 512 predicate places. [2024-11-27 23:44:02,687 INFO L471 AbstractCegarLoop]: Abstraction has has 537 places, 2393 transitions, 56313 flow [2024-11-27 23:44:02,687 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 5.125) internal successors, (164), 32 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:44:02,687 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 23:44:02,687 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:44:02,702 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3890e4aa-a98d-499c-aba5-ded5e1c7ed18/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-11-27 23:44:02,891 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3890e4aa-a98d-499c-aba5-ded5e1c7ed18/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-11-27 23:44:02,892 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-27 23:44:02,892 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:44:02,892 INFO L85 PathProgramCache]: Analyzing trace with hash 1184612140, now seen corresponding path program 24 times [2024-11-27 23:44:02,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:44:02,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266664824] [2024-11-27 23:44:02,893 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-27 23:44:02,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:44:02,919 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-27 23:44:02,919 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:44:03,350 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-27 23:44:03,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:44:03,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266664824] [2024-11-27 23:44:03,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266664824] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:44:03,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099482818] [2024-11-27 23:44:03,350 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-27 23:44:03,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:44:03,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3890e4aa-a98d-499c-aba5-ded5e1c7ed18/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:44:03,352 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3890e4aa-a98d-499c-aba5-ded5e1c7ed18/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:44:03,355 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3890e4aa-a98d-499c-aba5-ded5e1c7ed18/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-27 23:44:03,455 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-27 23:44:03,455 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:44:03,457 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-27 23:44:03,458 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:44:03,733 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-27 23:44:03,733 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:44:04,101 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 23:44:04,102 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 43 [2024-11-27 23:44:04,214 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-27 23:44:04,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099482818] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:44:04,214 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:44:04,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 9] total 21 [2024-11-27 23:44:04,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349216216] [2024-11-27 23:44:04,215 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:44:04,215 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-27 23:44:04,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:44:04,215 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-27 23:44:04,216 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2024-11-27 23:44:04,415 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2024-11-27 23:44:04,415 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 537 places, 2393 transitions, 56313 flow. Second operand has 22 states, 22 states have (on average 6.863636363636363) internal successors, (151), 22 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:44:04,415 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 23:44:04,415 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2024-11-27 23:44:04,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 23:44:17,367 INFO L124 PetriNetUnfolderBase]: 8729/14845 cut-off events. [2024-11-27 23:44:17,367 INFO L125 PetriNetUnfolderBase]: For 481509/482306 co-relation queries the response was YES. [2024-11-27 23:44:17,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 172251 conditions, 14845 events. 8729/14845 cut-off events. For 481509/482306 co-relation queries the response was YES. Maximal size of possible extension queue 653. Compared 107863 event pairs, 222 based on Foata normal form. 474/15223 useless extension candidates. Maximal degree in co-relation 171885. Up to 11001 conditions per place. [2024-11-27 23:44:17,706 INFO L140 encePairwiseOnDemand]: 13/24 looper letters, 2001 selfloop transitions, 309 changer transitions 4/2569 dead transitions. [2024-11-27 23:44:17,706 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 558 places, 2569 transitions, 64767 flow [2024-11-27 23:44:17,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-27 23:44:17,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-11-27 23:44:17,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 222 transitions. [2024-11-27 23:44:17,707 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.42045454545454547 [2024-11-27 23:44:17,707 INFO L175 Difference]: Start difference. First operand has 537 places, 2393 transitions, 56313 flow. Second operand 22 states and 222 transitions. [2024-11-27 23:44:17,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 558 places, 2569 transitions, 64767 flow [2024-11-27 23:44:24,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 545 places, 2569 transitions, 63625 flow, removed 474 selfloop flow, removed 13 redundant places. [2024-11-27 23:44:24,574 INFO L231 Difference]: Finished difference. Result has 552 places, 2481 transitions, 58754 flow [2024-11-27 23:44:24,576 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=55227, PETRI_DIFFERENCE_MINUEND_PLACES=524, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=245, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=58754, PETRI_PLACES=552, PETRI_TRANSITIONS=2481} [2024-11-27 23:44:24,576 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 527 predicate places. [2024-11-27 23:44:24,576 INFO L471 AbstractCegarLoop]: Abstraction has has 552 places, 2481 transitions, 58754 flow [2024-11-27 23:44:24,577 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 6.863636363636363) internal successors, (151), 22 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:44:24,577 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 23:44:24,577 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:44:24,584 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3890e4aa-a98d-499c-aba5-ded5e1c7ed18/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-11-27 23:44:24,777 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3890e4aa-a98d-499c-aba5-ded5e1c7ed18/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-11-27 23:44:24,777 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-27 23:44:24,778 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:44:24,778 INFO L85 PathProgramCache]: Analyzing trace with hash 841766124, now seen corresponding path program 25 times [2024-11-27 23:44:24,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:44:24,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764492699] [2024-11-27 23:44:24,778 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-27 23:44:24,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:44:24,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat