./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-more-nonblocking-counter-alt2.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_ade42209-dc35-48c1-8440-3466d45a7fc5/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade42209-dc35-48c1-8440-3466d45a7fc5/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_ade42209-dc35-48c1-8440-3466d45a7fc5/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade42209-dc35-48c1-8440-3466d45a7fc5/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-more-nonblocking-counter-alt2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade42209-dc35-48c1-8440-3466d45a7fc5/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_ade42209-dc35-48c1-8440-3466d45a7fc5/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 87e1a1d3acb3ee9b7a4a97eb7b14df31d5b38b7566b1218cea0dabfe5ec8ddbd --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-27 19:50:24,073 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-27 19:50:24,174 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade42209-dc35-48c1-8440-3466d45a7fc5/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-27 19:50:24,182 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-27 19:50:24,183 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-27 19:50:24,212 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-27 19:50:24,213 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-27 19:50:24,213 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-27 19:50:24,214 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-27 19:50:24,214 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-27 19:50:24,214 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-27 19:50:24,214 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-27 19:50:24,214 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-27 19:50:24,215 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-27 19:50:24,215 INFO L153 SettingsManager]: * Use SBE=true [2024-11-27 19:50:24,215 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-27 19:50:24,215 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-27 19:50:24,215 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-27 19:50:24,215 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-27 19:50:24,215 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-27 19:50:24,215 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-27 19:50:24,216 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-27 19:50:24,216 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-27 19:50:24,216 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-27 19:50:24,216 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-27 19:50:24,216 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-27 19:50:24,216 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-27 19:50:24,216 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-27 19:50:24,216 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-27 19:50:24,216 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-27 19:50:24,217 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-27 19:50:24,217 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-27 19:50:24,217 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 19:50:24,217 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-27 19:50:24,217 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-27 19:50:24,217 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-27 19:50:24,217 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-27 19:50:24,217 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 19:50:24,218 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-27 19:50:24,218 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-27 19:50:24,218 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-11-27 19:50:24,218 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-27 19:50:24,218 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-27 19:50:24,218 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-27 19:50:24,218 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-27 19:50:24,218 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-27 19:50:24,218 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-27 19:50:24,218 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-27 19:50:24,218 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_ade42209-dc35-48c1-8440-3466d45a7fc5/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 -> 87e1a1d3acb3ee9b7a4a97eb7b14df31d5b38b7566b1218cea0dabfe5ec8ddbd [2024-11-27 19:50:24,533 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-27 19:50:24,547 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-27 19:50:24,551 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-27 19:50:24,553 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-27 19:50:24,553 INFO L274 PluginConnector]: CDTParser initialized [2024-11-27 19:50:24,554 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade42209-dc35-48c1-8440-3466d45a7fc5/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/weaver/popl20-more-nonblocking-counter-alt2.wvr.c [2024-11-27 19:50:27,761 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade42209-dc35-48c1-8440-3466d45a7fc5/bin/uautomizer-verify-aQ6SnzHsRB/data/0f470f554/a91bd3369ab849e2aabae05a7a58d0dc/FLAGfce000992 [2024-11-27 19:50:28,049 INFO L384 CDTParser]: Found 1 translation units. [2024-11-27 19:50:28,051 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade42209-dc35-48c1-8440-3466d45a7fc5/sv-benchmarks/c/weaver/popl20-more-nonblocking-counter-alt2.wvr.c [2024-11-27 19:50:28,060 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade42209-dc35-48c1-8440-3466d45a7fc5/bin/uautomizer-verify-aQ6SnzHsRB/data/0f470f554/a91bd3369ab849e2aabae05a7a58d0dc/FLAGfce000992 [2024-11-27 19:50:28,084 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade42209-dc35-48c1-8440-3466d45a7fc5/bin/uautomizer-verify-aQ6SnzHsRB/data/0f470f554/a91bd3369ab849e2aabae05a7a58d0dc [2024-11-27 19:50:28,087 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-27 19:50:28,089 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-27 19:50:28,092 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-27 19:50:28,092 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-27 19:50:28,097 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-27 19:50:28,098 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 07:50:28" (1/1) ... [2024-11-27 19:50:28,099 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@aa79b33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:50:28, skipping insertion in model container [2024-11-27 19:50:28,099 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 07:50:28" (1/1) ... [2024-11-27 19:50:28,125 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-27 19:50:28,325 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_ade42209-dc35-48c1-8440-3466d45a7fc5/sv-benchmarks/c/weaver/popl20-more-nonblocking-counter-alt2.wvr.c[2173,2186] [2024-11-27 19:50:28,330 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-27 19:50:28,340 INFO L200 MainTranslator]: Completed pre-run [2024-11-27 19:50:28,370 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_ade42209-dc35-48c1-8440-3466d45a7fc5/sv-benchmarks/c/weaver/popl20-more-nonblocking-counter-alt2.wvr.c[2173,2186] [2024-11-27 19:50:28,370 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-27 19:50:28,386 INFO L204 MainTranslator]: Completed translation [2024-11-27 19:50:28,387 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:50:28 WrapperNode [2024-11-27 19:50:28,388 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-27 19:50:28,389 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-27 19:50:28,389 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-27 19:50:28,390 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-27 19:50:28,400 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:50:28" (1/1) ... [2024-11-27 19:50:28,408 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:50:28" (1/1) ... [2024-11-27 19:50:28,426 INFO L138 Inliner]: procedures = 20, calls = 14, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 44 [2024-11-27 19:50:28,427 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-27 19:50:28,428 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-27 19:50:28,429 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-27 19:50:28,429 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-27 19:50:28,438 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:50:28" (1/1) ... [2024-11-27 19:50:28,438 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:50:28" (1/1) ... [2024-11-27 19:50:28,440 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:50:28" (1/1) ... [2024-11-27 19:50:28,466 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-11-27 19:50:28,466 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:50:28" (1/1) ... [2024-11-27 19:50:28,467 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:50:28" (1/1) ... [2024-11-27 19:50:28,472 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:50:28" (1/1) ... [2024-11-27 19:50:28,472 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:50:28" (1/1) ... [2024-11-27 19:50:28,478 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:50:28" (1/1) ... [2024-11-27 19:50:28,479 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:50:28" (1/1) ... [2024-11-27 19:50:28,482 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:50:28" (1/1) ... [2024-11-27 19:50:28,484 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-27 19:50:28,485 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-27 19:50:28,489 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-27 19:50:28,489 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-27 19:50:28,490 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:50:28" (1/1) ... [2024-11-27 19:50:28,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 19:50:28,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade42209-dc35-48c1-8440-3466d45a7fc5/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:50:28,529 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade42209-dc35-48c1-8440-3466d45a7fc5/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-27 19:50:28,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade42209-dc35-48c1-8440-3466d45a7fc5/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-27 19:50:28,561 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-27 19:50:28,561 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-27 19:50:28,561 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-27 19:50:28,562 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-27 19:50:28,562 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-27 19:50:28,562 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-27 19:50:28,564 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-27 19:50:28,564 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-27 19:50:28,564 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-27 19:50:28,564 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-27 19:50:28,566 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-27 19:50:28,654 INFO L234 CfgBuilder]: Building ICFG [2024-11-27 19:50:28,656 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-27 19:50:28,853 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-27 19:50:28,854 INFO L283 CfgBuilder]: Performing block encoding [2024-11-27 19:50:29,032 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-27 19:50:29,033 INFO L312 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-27 19:50:29,034 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 07:50:29 BoogieIcfgContainer [2024-11-27 19:50:29,035 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-27 19:50:29,038 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-27 19:50:29,038 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-27 19:50:29,045 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-27 19:50:29,045 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.11 07:50:28" (1/3) ... [2024-11-27 19:50:29,046 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a170d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 07:50:29, skipping insertion in model container [2024-11-27 19:50:29,046 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:50:28" (2/3) ... [2024-11-27 19:50:29,047 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a170d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 07:50:29, skipping insertion in model container [2024-11-27 19:50:29,047 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 07:50:29" (3/3) ... [2024-11-27 19:50:29,048 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-more-nonblocking-counter-alt2.wvr.c [2024-11-27 19:50:29,066 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-27 19:50:29,068 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-more-nonblocking-counter-alt2.wvr.c that has 3 procedures, 20 locations, 1 initial locations, 2 loop locations, and 1 error locations. [2024-11-27 19:50:29,069 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-27 19:50:29,144 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-27 19:50:29,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 26 places, 21 transitions, 56 flow [2024-11-27 19:50:29,239 INFO L124 PetriNetUnfolderBase]: 2/19 cut-off events. [2024-11-27 19:50:29,245 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-27 19:50:29,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28 conditions, 19 events. 2/19 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 19 event pairs, 0 based on Foata normal form. 0/16 useless extension candidates. Maximal degree in co-relation 14. Up to 2 conditions per place. [2024-11-27 19:50:29,252 INFO L82 GeneralOperation]: Start removeDead. Operand has 26 places, 21 transitions, 56 flow [2024-11-27 19:50:29,258 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 23 places, 18 transitions, 48 flow [2024-11-27 19:50:29,277 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-27 19:50:29,294 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;@2c11be21, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-27 19:50:29,294 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-11-27 19:50:29,306 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-27 19:50:29,306 INFO L124 PetriNetUnfolderBase]: 2/17 cut-off events. [2024-11-27 19:50:29,306 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-27 19:50:29,306 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 19:50:29,311 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:50:29,311 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 19:50:29,319 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:50:29,320 INFO L85 PathProgramCache]: Analyzing trace with hash 2020468598, now seen corresponding path program 1 times [2024-11-27 19:50:29,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:50:29,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163140664] [2024-11-27 19:50:29,328 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:50:29,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:50:29,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:50:29,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:50:29,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:50:29,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163140664] [2024-11-27 19:50:29,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163140664] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 19:50:29,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 19:50:29,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-27 19:50:29,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687759013] [2024-11-27 19:50:29,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 19:50:29,797 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-27 19:50:29,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:50:29,832 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-27 19:50:29,832 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-27 19:50:29,844 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2024-11-27 19:50:29,847 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 18 transitions, 48 flow. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:50:29,848 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 19:50:29,848 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2024-11-27 19:50:29,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 19:50:29,997 INFO L124 PetriNetUnfolderBase]: 73/144 cut-off events. [2024-11-27 19:50:29,997 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2024-11-27 19:50:29,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 301 conditions, 144 events. 73/144 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 409 event pairs, 22 based on Foata normal form. 1/141 useless extension candidates. Maximal degree in co-relation 252. Up to 74 conditions per place. [2024-11-27 19:50:30,001 INFO L140 encePairwiseOnDemand]: 18/21 looper letters, 20 selfloop transitions, 2 changer transitions 3/28 dead transitions. [2024-11-27 19:50:30,002 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 28 transitions, 127 flow [2024-11-27 19:50:30,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-27 19:50:30,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-27 19:50:30,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 41 transitions. [2024-11-27 19:50:30,015 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6507936507936508 [2024-11-27 19:50:30,017 INFO L175 Difference]: Start difference. First operand has 23 places, 18 transitions, 48 flow. Second operand 3 states and 41 transitions. [2024-11-27 19:50:30,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 28 transitions, 127 flow [2024-11-27 19:50:30,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 28 transitions, 113 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-27 19:50:30,024 INFO L231 Difference]: Finished difference. Result has 22 places, 19 transitions, 52 flow [2024-11-27 19:50:30,027 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=40, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=52, PETRI_PLACES=22, PETRI_TRANSITIONS=19} [2024-11-27 19:50:30,030 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, -1 predicate places. [2024-11-27 19:50:30,031 INFO L471 AbstractCegarLoop]: Abstraction has has 22 places, 19 transitions, 52 flow [2024-11-27 19:50:30,031 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:50:30,031 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 19:50:30,031 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:50:30,031 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-27 19:50:30,031 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 19:50:30,032 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:50:30,032 INFO L85 PathProgramCache]: Analyzing trace with hash 1800830420, now seen corresponding path program 1 times [2024-11-27 19:50:30,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:50:30,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895186636] [2024-11-27 19:50:30,033 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:50:30,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:50:30,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:50:30,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:50:30,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:50:30,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895186636] [2024-11-27 19:50:30,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895186636] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 19:50:30,285 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 19:50:30,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-27 19:50:30,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853097815] [2024-11-27 19:50:30,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 19:50:30,286 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-27 19:50:30,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:50:30,287 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-27 19:50:30,287 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-27 19:50:30,292 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 21 [2024-11-27 19:50:30,293 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 19 transitions, 52 flow. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:50:30,293 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 19:50:30,293 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 21 [2024-11-27 19:50:30,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 19:50:30,438 INFO L124 PetriNetUnfolderBase]: 141/258 cut-off events. [2024-11-27 19:50:30,439 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-11-27 19:50:30,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 531 conditions, 258 events. 141/258 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 891 event pairs, 81 based on Foata normal form. 0/213 useless extension candidates. Maximal degree in co-relation 277. Up to 179 conditions per place. [2024-11-27 19:50:30,443 INFO L140 encePairwiseOnDemand]: 17/21 looper letters, 21 selfloop transitions, 3 changer transitions 0/27 dead transitions. [2024-11-27 19:50:30,444 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 27 transitions, 117 flow [2024-11-27 19:50:30,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-27 19:50:30,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-27 19:50:30,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 41 transitions. [2024-11-27 19:50:30,447 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4880952380952381 [2024-11-27 19:50:30,447 INFO L175 Difference]: Start difference. First operand has 22 places, 19 transitions, 52 flow. Second operand 4 states and 41 transitions. [2024-11-27 19:50:30,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 27 transitions, 117 flow [2024-11-27 19:50:30,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 27 transitions, 115 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-27 19:50:30,449 INFO L231 Difference]: Finished difference. Result has 25 places, 20 transitions, 64 flow [2024-11-27 19:50:30,449 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=64, PETRI_PLACES=25, PETRI_TRANSITIONS=20} [2024-11-27 19:50:30,451 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 2 predicate places. [2024-11-27 19:50:30,451 INFO L471 AbstractCegarLoop]: Abstraction has has 25 places, 20 transitions, 64 flow [2024-11-27 19:50:30,452 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:50:30,452 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 19:50:30,452 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 19:50:30,453 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-27 19:50:30,453 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 19:50:30,454 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:50:30,454 INFO L85 PathProgramCache]: Analyzing trace with hash -2023668756, now seen corresponding path program 1 times [2024-11-27 19:50:30,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:50:30,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109377926] [2024-11-27 19:50:30,456 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:50:30,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:50:30,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:50:31,038 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:50:31,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:50:31,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109377926] [2024-11-27 19:50:31,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109377926] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 19:50:31,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637144299] [2024-11-27 19:50:31,039 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:50:31,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:50:31,040 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade42209-dc35-48c1-8440-3466d45a7fc5/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:50:31,043 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade42209-dc35-48c1-8440-3466d45a7fc5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:50:31,047 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade42209-dc35-48c1-8440-3466d45a7fc5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-27 19:50:31,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:50:31,149 INFO L256 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-27 19:50:31,153 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:50:31,537 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:50:31,537 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 19:50:32,080 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:50:32,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637144299] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 19:50:32,081 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 19:50:32,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 15 [2024-11-27 19:50:32,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012488210] [2024-11-27 19:50:32,081 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 19:50:32,083 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-27 19:50:32,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:50:32,084 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-27 19:50:32,085 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2024-11-27 19:50:32,150 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-11-27 19:50:32,151 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 20 transitions, 64 flow. Second operand has 16 states, 16 states have (on average 5.8125) internal successors, (93), 16 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 19:50:32,151 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 19:50:32,151 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-11-27 19:50:32,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 19:50:33,159 INFO L124 PetriNetUnfolderBase]: 580/998 cut-off events. [2024-11-27 19:50:33,160 INFO L125 PetriNetUnfolderBase]: For 237/237 co-relation queries the response was YES. [2024-11-27 19:50:33,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2436 conditions, 998 events. 580/998 cut-off events. For 237/237 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 4179 event pairs, 28 based on Foata normal form. 2/920 useless extension candidates. Maximal degree in co-relation 879. Up to 244 conditions per place. [2024-11-27 19:50:33,168 INFO L140 encePairwiseOnDemand]: 12/21 looper letters, 114 selfloop transitions, 42 changer transitions 12/169 dead transitions. [2024-11-27 19:50:33,168 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 169 transitions, 831 flow [2024-11-27 19:50:33,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-27 19:50:33,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-11-27 19:50:33,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 223 transitions. [2024-11-27 19:50:33,172 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5588972431077694 [2024-11-27 19:50:33,172 INFO L175 Difference]: Start difference. First operand has 25 places, 20 transitions, 64 flow. Second operand 19 states and 223 transitions. [2024-11-27 19:50:33,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 169 transitions, 831 flow [2024-11-27 19:50:33,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 169 transitions, 807 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-11-27 19:50:33,177 INFO L231 Difference]: Finished difference. Result has 52 places, 65 transitions, 412 flow [2024-11-27 19:50:33,177 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=412, PETRI_PLACES=52, PETRI_TRANSITIONS=65} [2024-11-27 19:50:33,178 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 29 predicate places. [2024-11-27 19:50:33,178 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 65 transitions, 412 flow [2024-11-27 19:50:33,179 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.8125) internal successors, (93), 16 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 19:50:33,179 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 19:50:33,179 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 19:50:33,189 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade42209-dc35-48c1-8440-3466d45a7fc5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-27 19:50:33,383 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade42209-dc35-48c1-8440-3466d45a7fc5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:50:33,383 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 19:50:33,384 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:50:33,384 INFO L85 PathProgramCache]: Analyzing trace with hash 1804494400, now seen corresponding path program 2 times [2024-11-27 19:50:33,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:50:33,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621746322] [2024-11-27 19:50:33,384 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 19:50:33,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:50:33,415 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 19:50:33,415 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:50:33,731 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:50:33,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:50:33,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621746322] [2024-11-27 19:50:33,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621746322] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 19:50:33,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150032310] [2024-11-27 19:50:33,732 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 19:50:33,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:50:33,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade42209-dc35-48c1-8440-3466d45a7fc5/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:50:33,734 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade42209-dc35-48c1-8440-3466d45a7fc5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:50:33,737 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade42209-dc35-48c1-8440-3466d45a7fc5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-27 19:50:33,806 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 19:50:33,806 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:50:33,807 INFO L256 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-27 19:50:33,810 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:50:33,953 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 19:50:33,954 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 19:50:33,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150032310] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 19:50:33,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-27 19:50:33,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 10 [2024-11-27 19:50:33,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829473867] [2024-11-27 19:50:33,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 19:50:33,955 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-27 19:50:33,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:50:33,957 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-27 19:50:33,957 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2024-11-27 19:50:33,972 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-11-27 19:50:33,972 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 65 transitions, 412 flow. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:50:33,972 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 19:50:33,972 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-11-27 19:50:33,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 19:50:34,270 INFO L124 PetriNetUnfolderBase]: 604/1038 cut-off events. [2024-11-27 19:50:34,270 INFO L125 PetriNetUnfolderBase]: For 1854/1854 co-relation queries the response was YES. [2024-11-27 19:50:34,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3700 conditions, 1038 events. 604/1038 cut-off events. For 1854/1854 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 4360 event pairs, 175 based on Foata normal form. 2/1040 useless extension candidates. Maximal degree in co-relation 3401. Up to 912 conditions per place. [2024-11-27 19:50:34,280 INFO L140 encePairwiseOnDemand]: 14/21 looper letters, 80 selfloop transitions, 9 changer transitions 0/90 dead transitions. [2024-11-27 19:50:34,280 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 90 transitions, 729 flow [2024-11-27 19:50:34,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-27 19:50:34,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-27 19:50:34,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 64 transitions. [2024-11-27 19:50:34,282 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5079365079365079 [2024-11-27 19:50:34,282 INFO L175 Difference]: Start difference. First operand has 52 places, 65 transitions, 412 flow. Second operand 6 states and 64 transitions. [2024-11-27 19:50:34,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 90 transitions, 729 flow [2024-11-27 19:50:34,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 90 transitions, 685 flow, removed 20 selfloop flow, removed 1 redundant places. [2024-11-27 19:50:34,305 INFO L231 Difference]: Finished difference. Result has 59 places, 69 transitions, 435 flow [2024-11-27 19:50:34,306 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=369, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=435, PETRI_PLACES=59, PETRI_TRANSITIONS=69} [2024-11-27 19:50:34,308 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 36 predicate places. [2024-11-27 19:50:34,308 INFO L471 AbstractCegarLoop]: Abstraction has has 59 places, 69 transitions, 435 flow [2024-11-27 19:50:34,308 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:50:34,308 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 19:50:34,308 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 19:50:34,319 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade42209-dc35-48c1-8440-3466d45a7fc5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-27 19:50:34,509 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade42209-dc35-48c1-8440-3466d45a7fc5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:50:34,509 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 19:50:34,509 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:50:34,510 INFO L85 PathProgramCache]: Analyzing trace with hash 918696120, now seen corresponding path program 3 times [2024-11-27 19:50:34,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:50:34,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995000755] [2024-11-27 19:50:34,510 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 19:50:34,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:50:34,526 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-27 19:50:34,526 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:50:34,777 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:50:34,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:50:34,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995000755] [2024-11-27 19:50:34,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995000755] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 19:50:34,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405134516] [2024-11-27 19:50:34,778 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 19:50:34,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:50:34,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade42209-dc35-48c1-8440-3466d45a7fc5/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:50:34,780 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade42209-dc35-48c1-8440-3466d45a7fc5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:50:34,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade42209-dc35-48c1-8440-3466d45a7fc5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-27 19:50:34,855 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-27 19:50:34,855 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:50:34,858 INFO L256 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-27 19:50:34,860 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:50:34,993 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 19:50:34,994 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 19:50:34,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405134516] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 19:50:34,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-27 19:50:34,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 10 [2024-11-27 19:50:34,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699663549] [2024-11-27 19:50:34,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 19:50:34,994 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-27 19:50:34,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:50:34,995 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-27 19:50:34,995 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2024-11-27 19:50:35,000 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-11-27 19:50:35,000 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 69 transitions, 435 flow. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:50:35,000 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 19:50:35,000 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-11-27 19:50:35,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 19:50:35,266 INFO L124 PetriNetUnfolderBase]: 628/1078 cut-off events. [2024-11-27 19:50:35,266 INFO L125 PetriNetUnfolderBase]: For 2435/2435 co-relation queries the response was YES. [2024-11-27 19:50:35,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4077 conditions, 1078 events. 628/1078 cut-off events. For 2435/2435 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 4527 event pairs, 182 based on Foata normal form. 4/1082 useless extension candidates. Maximal degree in co-relation 3563. Up to 920 conditions per place. [2024-11-27 19:50:35,280 INFO L140 encePairwiseOnDemand]: 14/21 looper letters, 77 selfloop transitions, 13 changer transitions 0/91 dead transitions. [2024-11-27 19:50:35,281 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 91 transitions, 771 flow [2024-11-27 19:50:35,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-27 19:50:35,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-27 19:50:35,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 61 transitions. [2024-11-27 19:50:35,284 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.48412698412698413 [2024-11-27 19:50:35,285 INFO L175 Difference]: Start difference. First operand has 59 places, 69 transitions, 435 flow. Second operand 6 states and 61 transitions. [2024-11-27 19:50:35,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 91 transitions, 771 flow [2024-11-27 19:50:35,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 91 transitions, 742 flow, removed 10 selfloop flow, removed 2 redundant places. [2024-11-27 19:50:35,304 INFO L231 Difference]: Finished difference. Result has 64 places, 74 transitions, 507 flow [2024-11-27 19:50:35,305 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=418, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=507, PETRI_PLACES=64, PETRI_TRANSITIONS=74} [2024-11-27 19:50:35,306 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 41 predicate places. [2024-11-27 19:50:35,308 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 74 transitions, 507 flow [2024-11-27 19:50:35,308 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:50:35,308 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 19:50:35,308 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 19:50:35,319 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade42209-dc35-48c1-8440-3466d45a7fc5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-27 19:50:35,509 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade42209-dc35-48c1-8440-3466d45a7fc5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:50:35,509 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 19:50:35,509 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:50:35,510 INFO L85 PathProgramCache]: Analyzing trace with hash -31554280, now seen corresponding path program 4 times [2024-11-27 19:50:35,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:50:35,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874746011] [2024-11-27 19:50:35,510 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-27 19:50:35,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:50:35,526 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-27 19:50:35,527 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:50:35,685 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:50:35,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:50:35,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874746011] [2024-11-27 19:50:35,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874746011] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 19:50:35,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530388204] [2024-11-27 19:50:35,686 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-27 19:50:35,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:50:35,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade42209-dc35-48c1-8440-3466d45a7fc5/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:50:35,689 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade42209-dc35-48c1-8440-3466d45a7fc5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:50:35,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade42209-dc35-48c1-8440-3466d45a7fc5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-27 19:50:35,747 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-27 19:50:35,747 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:50:35,748 INFO L256 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-27 19:50:35,751 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:50:35,888 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 19:50:35,889 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 19:50:35,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530388204] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 19:50:35,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-27 19:50:35,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [4] total 8 [2024-11-27 19:50:35,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055749815] [2024-11-27 19:50:35,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 19:50:35,890 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-27 19:50:35,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:50:35,891 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-27 19:50:35,891 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-11-27 19:50:35,910 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-11-27 19:50:35,910 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 74 transitions, 507 flow. Second operand has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 7 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:50:35,911 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 19:50:35,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-11-27 19:50:35,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 19:50:36,233 INFO L124 PetriNetUnfolderBase]: 685/1181 cut-off events. [2024-11-27 19:50:36,233 INFO L125 PetriNetUnfolderBase]: For 3401/3401 co-relation queries the response was YES. [2024-11-27 19:50:36,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4489 conditions, 1181 events. 685/1181 cut-off events. For 3401/3401 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 5168 event pairs, 167 based on Foata normal form. 26/1207 useless extension candidates. Maximal degree in co-relation 3955. Up to 825 conditions per place. [2024-11-27 19:50:36,245 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 79 selfloop transitions, 19 changer transitions 0/99 dead transitions. [2024-11-27 19:50:36,245 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 99 transitions, 828 flow [2024-11-27 19:50:36,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-27 19:50:36,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-27 19:50:36,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 68 transitions. [2024-11-27 19:50:36,246 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.46258503401360546 [2024-11-27 19:50:36,246 INFO L175 Difference]: Start difference. First operand has 64 places, 74 transitions, 507 flow. Second operand 7 states and 68 transitions. [2024-11-27 19:50:36,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 99 transitions, 828 flow [2024-11-27 19:50:36,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 99 transitions, 809 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-11-27 19:50:36,260 INFO L231 Difference]: Finished difference. Result has 71 places, 78 transitions, 587 flow [2024-11-27 19:50:36,260 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=488, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=587, PETRI_PLACES=71, PETRI_TRANSITIONS=78} [2024-11-27 19:50:36,263 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 48 predicate places. [2024-11-27 19:50:36,263 INFO L471 AbstractCegarLoop]: Abstraction has has 71 places, 78 transitions, 587 flow [2024-11-27 19:50:36,263 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 7 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:50:36,263 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 19:50:36,264 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:50:36,274 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade42209-dc35-48c1-8440-3466d45a7fc5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-27 19:50:36,468 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade42209-dc35-48c1-8440-3466d45a7fc5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-27 19:50:36,468 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 19:50:36,469 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:50:36,469 INFO L85 PathProgramCache]: Analyzing trace with hash -2086087432, now seen corresponding path program 5 times [2024-11-27 19:50:36,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:50:36,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054966731] [2024-11-27 19:50:36,470 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-27 19:50:36,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:50:36,503 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 19:50:36,503 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:50:36,762 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:50:36,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:50:36,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054966731] [2024-11-27 19:50:36,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054966731] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 19:50:36,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834787861] [2024-11-27 19:50:36,763 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-27 19:50:36,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:50:36,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade42209-dc35-48c1-8440-3466d45a7fc5/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:50:36,765 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade42209-dc35-48c1-8440-3466d45a7fc5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:50:36,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade42209-dc35-48c1-8440-3466d45a7fc5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-27 19:50:36,822 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 19:50:36,822 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:50:36,823 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-27 19:50:36,825 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:50:36,978 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:50:36,978 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 19:50:37,205 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:50:37,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834787861] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 19:50:37,205 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 19:50:37,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 14 [2024-11-27 19:50:37,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783978737] [2024-11-27 19:50:37,206 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 19:50:37,206 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-27 19:50:37,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:50:37,207 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-27 19:50:37,207 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2024-11-27 19:50:37,221 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 21 [2024-11-27 19:50:37,221 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 78 transitions, 587 flow. Second operand has 14 states, 14 states have (on average 6.071428571428571) internal successors, (85), 14 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:50:37,221 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 19:50:37,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 21 [2024-11-27 19:50:37,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 19:50:38,289 INFO L124 PetriNetUnfolderBase]: 1391/2377 cut-off events. [2024-11-27 19:50:38,289 INFO L125 PetriNetUnfolderBase]: For 8079/8081 co-relation queries the response was YES. [2024-11-27 19:50:38,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8879 conditions, 2377 events. 1391/2377 cut-off events. For 8079/8081 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 11859 event pairs, 35 based on Foata normal form. 32/2409 useless extension candidates. Maximal degree in co-relation 8252. Up to 490 conditions per place. [2024-11-27 19:50:38,310 INFO L140 encePairwiseOnDemand]: 13/21 looper letters, 112 selfloop transitions, 161 changer transitions 19/313 dead transitions. [2024-11-27 19:50:38,310 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 313 transitions, 2700 flow [2024-11-27 19:50:38,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-27 19:50:38,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-11-27 19:50:38,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 254 transitions. [2024-11-27 19:50:38,312 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.503968253968254 [2024-11-27 19:50:38,312 INFO L175 Difference]: Start difference. First operand has 71 places, 78 transitions, 587 flow. Second operand 24 states and 254 transitions. [2024-11-27 19:50:38,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 313 transitions, 2700 flow [2024-11-27 19:50:38,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 313 transitions, 2615 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-11-27 19:50:38,339 INFO L231 Difference]: Finished difference. Result has 101 places, 210 transitions, 2035 flow [2024-11-27 19:50:38,339 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=551, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=2035, PETRI_PLACES=101, PETRI_TRANSITIONS=210} [2024-11-27 19:50:38,340 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 78 predicate places. [2024-11-27 19:50:38,340 INFO L471 AbstractCegarLoop]: Abstraction has has 101 places, 210 transitions, 2035 flow [2024-11-27 19:50:38,340 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.071428571428571) internal successors, (85), 14 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:50:38,340 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 19:50:38,340 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:50:38,350 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade42209-dc35-48c1-8440-3466d45a7fc5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-27 19:50:38,545 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade42209-dc35-48c1-8440-3466d45a7fc5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:50:38,545 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 19:50:38,546 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:50:38,546 INFO L85 PathProgramCache]: Analyzing trace with hash -1958553992, now seen corresponding path program 6 times [2024-11-27 19:50:38,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:50:38,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831279666] [2024-11-27 19:50:38,546 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-27 19:50:38,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:50:38,580 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-27 19:50:38,580 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:50:38,921 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:50:38,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:50:38,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831279666] [2024-11-27 19:50:38,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831279666] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 19:50:38,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655980618] [2024-11-27 19:50:38,922 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-27 19:50:38,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:50:38,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade42209-dc35-48c1-8440-3466d45a7fc5/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:50:38,924 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade42209-dc35-48c1-8440-3466d45a7fc5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:50:38,929 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade42209-dc35-48c1-8440-3466d45a7fc5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-27 19:50:38,985 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-27 19:50:38,985 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:50:38,986 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-27 19:50:38,987 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:50:39,145 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:50:39,145 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 19:50:39,445 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:50:39,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655980618] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 19:50:39,446 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 19:50:39,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 19 [2024-11-27 19:50:39,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585820142] [2024-11-27 19:50:39,446 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 19:50:39,446 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-27 19:50:39,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:50:39,447 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-27 19:50:39,447 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2024-11-27 19:50:39,467 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 21 [2024-11-27 19:50:39,468 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 210 transitions, 2035 flow. Second operand has 19 states, 19 states have (on average 6.052631578947368) internal successors, (115), 19 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:50:39,468 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 19:50:39,469 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 21 [2024-11-27 19:50:39,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 19:50:40,793 INFO L124 PetriNetUnfolderBase]: 1907/3239 cut-off events. [2024-11-27 19:50:40,794 INFO L125 PetriNetUnfolderBase]: For 19414/19416 co-relation queries the response was YES. [2024-11-27 19:50:40,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15568 conditions, 3239 events. 1907/3239 cut-off events. For 19414/19416 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 17381 event pairs, 78 based on Foata normal form. 14/3253 useless extension candidates. Maximal degree in co-relation 14285. Up to 746 conditions per place. [2024-11-27 19:50:40,834 INFO L140 encePairwiseOnDemand]: 12/21 looper letters, 198 selfloop transitions, 312 changer transitions 7/538 dead transitions. [2024-11-27 19:50:40,834 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 538 transitions, 6468 flow [2024-11-27 19:50:40,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-27 19:50:40,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-11-27 19:50:40,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 168 transitions. [2024-11-27 19:50:40,836 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.42105263157894735 [2024-11-27 19:50:40,836 INFO L175 Difference]: Start difference. First operand has 101 places, 210 transitions, 2035 flow. Second operand 19 states and 168 transitions. [2024-11-27 19:50:40,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 538 transitions, 6468 flow [2024-11-27 19:50:41,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 538 transitions, 6044 flow, removed 199 selfloop flow, removed 3 redundant places. [2024-11-27 19:50:41,061 INFO L231 Difference]: Finished difference. Result has 127 places, 433 transitions, 5497 flow [2024-11-27 19:50:41,062 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=1870, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=5497, PETRI_PLACES=127, PETRI_TRANSITIONS=433} [2024-11-27 19:50:41,062 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 104 predicate places. [2024-11-27 19:50:41,063 INFO L471 AbstractCegarLoop]: Abstraction has has 127 places, 433 transitions, 5497 flow [2024-11-27 19:50:41,063 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 6.052631578947368) internal successors, (115), 19 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:50:41,063 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 19:50:41,063 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:50:41,073 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade42209-dc35-48c1-8440-3466d45a7fc5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-27 19:50:41,267 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade42209-dc35-48c1-8440-3466d45a7fc5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:50:41,267 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 19:50:41,268 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:50:41,268 INFO L85 PathProgramCache]: Analyzing trace with hash 383367186, now seen corresponding path program 7 times [2024-11-27 19:50:41,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:50:41,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518200934] [2024-11-27 19:50:41,268 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-27 19:50:41,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:50:41,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:50:41,588 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:50:41,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:50:41,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518200934] [2024-11-27 19:50:41,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518200934] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 19:50:41,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795614743] [2024-11-27 19:50:41,589 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-27 19:50:41,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:50:41,589 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade42209-dc35-48c1-8440-3466d45a7fc5/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:50:41,591 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade42209-dc35-48c1-8440-3466d45a7fc5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:50:41,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade42209-dc35-48c1-8440-3466d45a7fc5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-27 19:50:41,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:50:41,651 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-27 19:50:41,652 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:50:41,787 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:50:41,787 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 19:50:42,001 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:50:42,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795614743] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 19:50:42,002 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 19:50:42,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 17 [2024-11-27 19:50:42,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597067651] [2024-11-27 19:50:42,002 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 19:50:42,002 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-27 19:50:42,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:50:42,003 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-27 19:50:42,003 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2024-11-27 19:50:42,053 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-11-27 19:50:42,053 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 433 transitions, 5497 flow. Second operand has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 17 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:50:42,053 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 19:50:42,053 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-11-27 19:50:42,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 19:50:44,760 INFO L124 PetriNetUnfolderBase]: 3080/5055 cut-off events. [2024-11-27 19:50:44,761 INFO L125 PetriNetUnfolderBase]: For 49952/49952 co-relation queries the response was YES. [2024-11-27 19:50:44,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29300 conditions, 5055 events. 3080/5055 cut-off events. For 49952/49952 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 28396 event pairs, 54 based on Foata normal form. 82/5137 useless extension candidates. Maximal degree in co-relation 28879. Up to 1298 conditions per place. [2024-11-27 19:50:44,838 INFO L140 encePairwiseOnDemand]: 11/21 looper letters, 297 selfloop transitions, 680 changer transitions 1/979 dead transitions. [2024-11-27 19:50:44,838 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 979 transitions, 13677 flow [2024-11-27 19:50:44,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-11-27 19:50:44,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2024-11-27 19:50:44,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 334 transitions. [2024-11-27 19:50:44,841 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.42985842985842987 [2024-11-27 19:50:44,841 INFO L175 Difference]: Start difference. First operand has 127 places, 433 transitions, 5497 flow. Second operand 37 states and 334 transitions. [2024-11-27 19:50:44,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 979 transitions, 13677 flow [2024-11-27 19:50:45,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 979 transitions, 13420 flow, removed 128 selfloop flow, removed 1 redundant places. [2024-11-27 19:50:45,206 INFO L231 Difference]: Finished difference. Result has 190 places, 865 transitions, 13421 flow [2024-11-27 19:50:45,207 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=5384, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=286, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=13421, PETRI_PLACES=190, PETRI_TRANSITIONS=865} [2024-11-27 19:50:45,208 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 167 predicate places. [2024-11-27 19:50:45,208 INFO L471 AbstractCegarLoop]: Abstraction has has 190 places, 865 transitions, 13421 flow [2024-11-27 19:50:45,208 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 17 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:50:45,208 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 19:50:45,208 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:50:45,218 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade42209-dc35-48c1-8440-3466d45a7fc5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-27 19:50:45,409 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade42209-dc35-48c1-8440-3466d45a7fc5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:50:45,409 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 19:50:45,410 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:50:45,410 INFO L85 PathProgramCache]: Analyzing trace with hash -1400371186, now seen corresponding path program 8 times [2024-11-27 19:50:45,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:50:45,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511067878] [2024-11-27 19:50:45,410 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 19:50:45,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:50:45,426 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 19:50:45,426 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:50:45,728 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:50:45,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:50:45,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511067878] [2024-11-27 19:50:45,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511067878] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 19:50:45,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270225320] [2024-11-27 19:50:45,729 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 19:50:45,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:50:45,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade42209-dc35-48c1-8440-3466d45a7fc5/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:50:45,731 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade42209-dc35-48c1-8440-3466d45a7fc5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:50:45,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade42209-dc35-48c1-8440-3466d45a7fc5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-27 19:50:45,792 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 19:50:45,793 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:50:45,794 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-27 19:50:45,846 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:50:45,999 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:50:45,999 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 19:50:46,252 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:50:46,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1270225320] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 19:50:46,252 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 19:50:46,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2024-11-27 19:50:46,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353074946] [2024-11-27 19:50:46,252 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 19:50:46,253 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-27 19:50:46,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:50:46,253 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-27 19:50:46,254 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2024-11-27 19:50:46,259 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 21 [2024-11-27 19:50:46,259 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 865 transitions, 13421 flow. Second operand has 16 states, 16 states have (on average 6.3125) internal successors, (101), 16 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:50:46,260 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 19:50:46,260 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 21 [2024-11-27 19:50:46,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 19:50:50,028 INFO L124 PetriNetUnfolderBase]: 3514/5976 cut-off events. [2024-11-27 19:50:50,028 INFO L125 PetriNetUnfolderBase]: For 109842/109848 co-relation queries the response was YES. [2024-11-27 19:50:50,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42860 conditions, 5976 events. 3514/5976 cut-off events. For 109842/109848 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 36916 event pairs, 81 based on Foata normal form. 56/6030 useless extension candidates. Maximal degree in co-relation 42342. Up to 1579 conditions per place. [2024-11-27 19:50:50,130 INFO L140 encePairwiseOnDemand]: 12/21 looper letters, 275 selfloop transitions, 950 changer transitions 1/1261 dead transitions. [2024-11-27 19:50:50,131 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 1261 transitions, 21440 flow [2024-11-27 19:50:50,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-11-27 19:50:50,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2024-11-27 19:50:50,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 304 transitions. [2024-11-27 19:50:50,133 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-11-27 19:50:50,134 INFO L175 Difference]: Start difference. First operand has 190 places, 865 transitions, 13421 flow. Second operand 32 states and 304 transitions. [2024-11-27 19:50:50,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 1261 transitions, 21440 flow [2024-11-27 19:50:51,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 1261 transitions, 20138 flow, removed 643 selfloop flow, removed 2 redundant places. [2024-11-27 19:50:51,296 INFO L231 Difference]: Finished difference. Result has 236 places, 1164 transitions, 20538 flow [2024-11-27 19:50:51,296 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=12485, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=865, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=667, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=20538, PETRI_PLACES=236, PETRI_TRANSITIONS=1164} [2024-11-27 19:50:51,297 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 213 predicate places. [2024-11-27 19:50:51,297 INFO L471 AbstractCegarLoop]: Abstraction has has 236 places, 1164 transitions, 20538 flow [2024-11-27 19:50:51,297 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 6.3125) internal successors, (101), 16 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:50:51,298 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 19:50:51,298 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:50:51,317 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade42209-dc35-48c1-8440-3466d45a7fc5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-27 19:50:51,498 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade42209-dc35-48c1-8440-3466d45a7fc5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-27 19:50:51,498 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 19:50:51,499 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:50:51,499 INFO L85 PathProgramCache]: Analyzing trace with hash 475759416, now seen corresponding path program 9 times [2024-11-27 19:50:51,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:50:51,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157452362] [2024-11-27 19:50:51,499 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 19:50:51,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:50:51,514 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-27 19:50:51,516 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:50:51,808 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:50:51,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:50:51,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157452362] [2024-11-27 19:50:51,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157452362] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 19:50:51,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978820885] [2024-11-27 19:50:51,808 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 19:50:51,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:50:51,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade42209-dc35-48c1-8440-3466d45a7fc5/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:50:51,810 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade42209-dc35-48c1-8440-3466d45a7fc5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:50:51,815 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade42209-dc35-48c1-8440-3466d45a7fc5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-27 19:50:51,861 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-27 19:50:51,861 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:50:51,862 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-27 19:50:51,863 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:50:51,980 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:50:51,980 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 19:50:52,184 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:50:52,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978820885] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 19:50:52,184 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 19:50:52,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 15 [2024-11-27 19:50:52,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537818796] [2024-11-27 19:50:52,185 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 19:50:52,185 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-27 19:50:52,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:50:52,187 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-27 19:50:52,188 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2024-11-27 19:50:52,197 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 21 [2024-11-27 19:50:52,197 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 1164 transitions, 20538 flow. Second operand has 15 states, 15 states have (on average 6.333333333333333) internal successors, (95), 15 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:50:52,198 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 19:50:52,198 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 21 [2024-11-27 19:50:52,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 19:50:55,289 INFO L124 PetriNetUnfolderBase]: 3515/5941 cut-off events. [2024-11-27 19:50:55,290 INFO L125 PetriNetUnfolderBase]: For 121417/121427 co-relation queries the response was YES. [2024-11-27 19:50:55,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47437 conditions, 5941 events. 3515/5941 cut-off events. For 121417/121427 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 36586 event pairs, 154 based on Foata normal form. 6/5945 useless extension candidates. Maximal degree in co-relation 47305. Up to 1583 conditions per place. [2024-11-27 19:50:55,373 INFO L140 encePairwiseOnDemand]: 12/21 looper letters, 361 selfloop transitions, 820 changer transitions 3/1219 dead transitions. [2024-11-27 19:50:55,373 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 1219 transitions, 23590 flow [2024-11-27 19:50:55,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-27 19:50:55,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-11-27 19:50:55,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 211 transitions. [2024-11-27 19:50:55,375 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.45670995670995673 [2024-11-27 19:50:55,375 INFO L175 Difference]: Start difference. First operand has 236 places, 1164 transitions, 20538 flow. Second operand 22 states and 211 transitions. [2024-11-27 19:50:55,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 1219 transitions, 23590 flow [2024-11-27 19:50:57,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 1219 transitions, 23313 flow, removed 126 selfloop flow, removed 4 redundant places. [2024-11-27 19:50:57,214 INFO L231 Difference]: Finished difference. Result has 253 places, 1167 transitions, 22509 flow [2024-11-27 19:50:57,215 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=20188, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=811, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=342, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=22509, PETRI_PLACES=253, PETRI_TRANSITIONS=1167} [2024-11-27 19:50:57,215 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 230 predicate places. [2024-11-27 19:50:57,215 INFO L471 AbstractCegarLoop]: Abstraction has has 253 places, 1167 transitions, 22509 flow [2024-11-27 19:50:57,216 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.333333333333333) internal successors, (95), 15 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:50:57,216 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 19:50:57,216 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:50:57,222 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade42209-dc35-48c1-8440-3466d45a7fc5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-27 19:50:57,416 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade42209-dc35-48c1-8440-3466d45a7fc5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-27 19:50:57,417 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 19:50:57,417 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:50:57,417 INFO L85 PathProgramCache]: Analyzing trace with hash -1678835268, now seen corresponding path program 10 times [2024-11-27 19:50:57,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:50:57,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45761065] [2024-11-27 19:50:57,418 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-27 19:50:57,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:50:57,435 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-27 19:50:57,436 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:50:57,739 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:50:57,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:50:57,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45761065] [2024-11-27 19:50:57,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45761065] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 19:50:57,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401614761] [2024-11-27 19:50:57,740 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-27 19:50:57,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:50:57,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade42209-dc35-48c1-8440-3466d45a7fc5/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:50:57,743 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade42209-dc35-48c1-8440-3466d45a7fc5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:50:57,747 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade42209-dc35-48c1-8440-3466d45a7fc5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-27 19:50:57,800 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-27 19:50:57,800 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:50:57,801 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-27 19:50:57,803 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:50:57,989 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:50:57,989 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 19:50:58,237 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:50:58,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401614761] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 19:50:58,237 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 19:50:58,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 19 [2024-11-27 19:50:58,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231698024] [2024-11-27 19:50:58,237 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 19:50:58,238 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-27 19:50:58,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:50:58,239 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-27 19:50:58,239 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2024-11-27 19:50:58,258 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-11-27 19:50:58,258 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 1167 transitions, 22509 flow. Second operand has 19 states, 19 states have (on average 5.684210526315789) internal successors, (108), 19 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:50:58,258 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 19:50:58,258 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-11-27 19:50:58,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 19:51:05,214 INFO L124 PetriNetUnfolderBase]: 5953/9749 cut-off events. [2024-11-27 19:51:05,214 INFO L125 PetriNetUnfolderBase]: For 274744/274744 co-relation queries the response was YES. [2024-11-27 19:51:05,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84666 conditions, 9749 events. 5953/9749 cut-off events. For 274744/274744 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 62474 event pairs, 92 based on Foata normal form. 130/9879 useless extension candidates. Maximal degree in co-relation 84459. Up to 2635 conditions per place. [2024-11-27 19:51:05,360 INFO L140 encePairwiseOnDemand]: 10/21 looper letters, 626 selfloop transitions, 1617 changer transitions 7/2251 dead transitions. [2024-11-27 19:51:05,360 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 2251 transitions, 47634 flow [2024-11-27 19:51:05,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2024-11-27 19:51:05,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2024-11-27 19:51:05,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 403 transitions. [2024-11-27 19:51:05,363 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4083080040526849 [2024-11-27 19:51:05,363 INFO L175 Difference]: Start difference. First operand has 253 places, 1167 transitions, 22509 flow. Second operand 47 states and 403 transitions. [2024-11-27 19:51:05,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 2251 transitions, 47634 flow [2024-11-27 19:51:09,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 2251 transitions, 46758 flow, removed 25 selfloop flow, removed 16 redundant places. [2024-11-27 19:51:09,185 INFO L231 Difference]: Finished difference. Result has 301 places, 2039 transitions, 45539 flow [2024-11-27 19:51:09,186 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=21913, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=843, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=45539, PETRI_PLACES=301, PETRI_TRANSITIONS=2039} [2024-11-27 19:51:09,187 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 278 predicate places. [2024-11-27 19:51:09,187 INFO L471 AbstractCegarLoop]: Abstraction has has 301 places, 2039 transitions, 45539 flow [2024-11-27 19:51:09,187 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.684210526315789) internal successors, (108), 19 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:51:09,187 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 19:51:09,187 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:51:09,199 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade42209-dc35-48c1-8440-3466d45a7fc5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-27 19:51:09,388 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade42209-dc35-48c1-8440-3466d45a7fc5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-27 19:51:09,388 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 19:51:09,389 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:51:09,389 INFO L85 PathProgramCache]: Analyzing trace with hash 53273690, now seen corresponding path program 11 times [2024-11-27 19:51:09,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:51:09,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646185958] [2024-11-27 19:51:09,389 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-27 19:51:09,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:51:09,411 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 19:51:09,411 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:51:09,661 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:51:09,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:51:09,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646185958] [2024-11-27 19:51:09,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646185958] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 19:51:09,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991303278] [2024-11-27 19:51:09,662 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-27 19:51:09,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:51:09,663 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade42209-dc35-48c1-8440-3466d45a7fc5/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:51:09,665 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade42209-dc35-48c1-8440-3466d45a7fc5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:51:09,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade42209-dc35-48c1-8440-3466d45a7fc5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-27 19:51:09,742 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 19:51:09,742 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:51:09,743 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-27 19:51:09,744 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:51:09,935 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:51:09,935 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 19:51:10,237 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:51:10,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991303278] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 19:51:10,237 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 19:51:10,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 17 [2024-11-27 19:51:10,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867391819] [2024-11-27 19:51:10,238 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 19:51:10,238 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-27 19:51:10,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:51:10,239 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-27 19:51:10,239 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2024-11-27 19:51:10,259 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 21 [2024-11-27 19:51:10,259 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 2039 transitions, 45539 flow. Second operand has 17 states, 17 states have (on average 5.882352941176471) internal successors, (100), 17 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:51:10,259 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 19:51:10,260 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 21 [2024-11-27 19:51:10,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 19:51:18,886 INFO L124 PetriNetUnfolderBase]: 6202/10403 cut-off events. [2024-11-27 19:51:18,886 INFO L125 PetriNetUnfolderBase]: For 313752/313788 co-relation queries the response was YES. [2024-11-27 19:51:18,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103536 conditions, 10403 events. 6202/10403 cut-off events. For 313752/313788 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 70564 event pairs, 486 based on Foata normal form. 20/10419 useless extension candidates. Maximal degree in co-relation 102824. Up to 3442 conditions per place. [2024-11-27 19:51:19,044 INFO L140 encePairwiseOnDemand]: 13/21 looper letters, 699 selfloop transitions, 1634 changer transitions 4/2415 dead transitions. [2024-11-27 19:51:19,045 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 2415 transitions, 58788 flow [2024-11-27 19:51:19,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-27 19:51:19,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-11-27 19:51:19,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 250 transitions. [2024-11-27 19:51:19,047 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4409171075837742 [2024-11-27 19:51:19,047 INFO L175 Difference]: Start difference. First operand has 301 places, 2039 transitions, 45539 flow. Second operand 27 states and 250 transitions. [2024-11-27 19:51:19,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 2415 transitions, 58788 flow [2024-11-27 19:51:26,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 2415 transitions, 56532 flow, removed 1028 selfloop flow, removed 10 redundant places. [2024-11-27 19:51:26,609 INFO L231 Difference]: Finished difference. Result has 334 places, 2356 transitions, 57880 flow [2024-11-27 19:51:26,610 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=44097, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2039, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1328, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=584, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=57880, PETRI_PLACES=334, PETRI_TRANSITIONS=2356} [2024-11-27 19:51:26,611 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 311 predicate places. [2024-11-27 19:51:26,611 INFO L471 AbstractCegarLoop]: Abstraction has has 334 places, 2356 transitions, 57880 flow [2024-11-27 19:51:26,611 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.882352941176471) internal successors, (100), 17 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:51:26,611 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 19:51:26,611 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:51:26,619 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade42209-dc35-48c1-8440-3466d45a7fc5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-27 19:51:26,812 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade42209-dc35-48c1-8440-3466d45a7fc5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-27 19:51:26,812 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 19:51:26,813 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:51:26,813 INFO L85 PathProgramCache]: Analyzing trace with hash -1727385962, now seen corresponding path program 12 times [2024-11-27 19:51:26,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:51:26,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931703948] [2024-11-27 19:51:26,814 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-27 19:51:26,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:51:26,841 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-27 19:51:26,842 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:51:27,168 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:51:27,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:51:27,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931703948] [2024-11-27 19:51:27,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931703948] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 19:51:27,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187985153] [2024-11-27 19:51:27,169 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-27 19:51:27,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:51:27,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade42209-dc35-48c1-8440-3466d45a7fc5/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:51:27,171 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade42209-dc35-48c1-8440-3466d45a7fc5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:51:27,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade42209-dc35-48c1-8440-3466d45a7fc5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-27 19:51:27,217 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-27 19:51:27,217 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:51:27,219 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-27 19:51:27,220 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:51:27,342 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:51:27,342 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 19:51:27,551 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:51:27,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1187985153] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 19:51:27,551 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 19:51:27,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 19 [2024-11-27 19:51:27,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529483132] [2024-11-27 19:51:27,551 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 19:51:27,552 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-27 19:51:27,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:51:27,552 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-27 19:51:27,552 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2024-11-27 19:51:27,557 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 21 [2024-11-27 19:51:27,557 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 2356 transitions, 57880 flow. Second operand has 19 states, 19 states have (on average 6.052631578947368) internal successors, (115), 19 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:51:27,557 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 19:51:27,557 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 21 [2024-11-27 19:51:27,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 19:51:36,167 INFO L124 PetriNetUnfolderBase]: 6808/11462 cut-off events. [2024-11-27 19:51:36,168 INFO L125 PetriNetUnfolderBase]: For 310922/310962 co-relation queries the response was YES. [2024-11-27 19:51:36,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120679 conditions, 11462 events. 6808/11462 cut-off events. For 310922/310962 co-relation queries the response was YES. Maximal size of possible extension queue 511. Compared 78932 event pairs, 122 based on Foata normal form. 114/11572 useless extension candidates. Maximal degree in co-relation 120538. Up to 3112 conditions per place. [2024-11-27 19:51:36,445 INFO L140 encePairwiseOnDemand]: 12/21 looper letters, 274 selfloop transitions, 2382 changer transitions 4/2738 dead transitions. [2024-11-27 19:51:36,445 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 2738 transitions, 72045 flow [2024-11-27 19:51:36,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-11-27 19:51:36,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2024-11-27 19:51:36,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 292 transitions. [2024-11-27 19:51:36,447 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-11-27 19:51:36,447 INFO L175 Difference]: Start difference. First operand has 334 places, 2356 transitions, 57880 flow. Second operand 32 states and 292 transitions. [2024-11-27 19:51:36,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 2738 transitions, 72045 flow [2024-11-27 19:51:48,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 2738 transitions, 71805 flow, removed 93 selfloop flow, removed 8 redundant places. [2024-11-27 19:51:48,608 INFO L231 Difference]: Finished difference. Result has 360 places, 2656 transitions, 74136 flow [2024-11-27 19:51:48,610 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=56929, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2327, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2058, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=74136, PETRI_PLACES=360, PETRI_TRANSITIONS=2656} [2024-11-27 19:51:48,610 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 337 predicate places. [2024-11-27 19:51:48,610 INFO L471 AbstractCegarLoop]: Abstraction has has 360 places, 2656 transitions, 74136 flow [2024-11-27 19:51:48,611 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 6.052631578947368) internal successors, (115), 19 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:51:48,611 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 19:51:48,611 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:51:48,622 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade42209-dc35-48c1-8440-3466d45a7fc5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-27 19:51:48,812 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade42209-dc35-48c1-8440-3466d45a7fc5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-27 19:51:48,812 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 19:51:48,813 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:51:48,813 INFO L85 PathProgramCache]: Analyzing trace with hash -1729108360, now seen corresponding path program 13 times [2024-11-27 19:51:48,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:51:48,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291805189] [2024-11-27 19:51:48,813 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-27 19:51:48,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:51:48,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:51:49,057 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:51:49,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:51:49,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291805189] [2024-11-27 19:51:49,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291805189] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 19:51:49,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536117366] [2024-11-27 19:51:49,058 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-27 19:51:49,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:51:49,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade42209-dc35-48c1-8440-3466d45a7fc5/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:51:49,061 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade42209-dc35-48c1-8440-3466d45a7fc5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:51:49,065 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade42209-dc35-48c1-8440-3466d45a7fc5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-27 19:51:49,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:51:49,163 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-27 19:51:49,165 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:51:49,317 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:51:49,317 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 19:51:49,524 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:51:49,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536117366] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 19:51:49,524 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 19:51:49,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 17 [2024-11-27 19:51:49,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117577118] [2024-11-27 19:51:49,524 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 19:51:49,524 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-27 19:51:49,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:51:49,525 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-27 19:51:49,525 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2024-11-27 19:51:49,533 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 21 [2024-11-27 19:51:49,534 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 2656 transitions, 74136 flow. Second operand has 17 states, 17 states have (on average 6.0) internal successors, (102), 17 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:51:49,534 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 19:51:49,534 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 21 [2024-11-27 19:51:49,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 19:52:02,355 INFO L124 PetriNetUnfolderBase]: 7471/12636 cut-off events. [2024-11-27 19:52:02,355 INFO L125 PetriNetUnfolderBase]: For 449354/449378 co-relation queries the response was YES. [2024-11-27 19:52:02,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 147839 conditions, 12636 events. 7471/12636 cut-off events. For 449354/449378 co-relation queries the response was YES. Maximal size of possible extension queue 575. Compared 89319 event pairs, 325 based on Foata normal form. 73/12707 useless extension candidates. Maximal degree in co-relation 147237. Up to 3354 conditions per place. [2024-11-27 19:52:02,579 INFO L140 encePairwiseOnDemand]: 13/21 looper letters, 661 selfloop transitions, 2294 changer transitions 2/3035 dead transitions. [2024-11-27 19:52:02,579 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 3035 transitions, 90194 flow [2024-11-27 19:52:02,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-27 19:52:02,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-11-27 19:52:02,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 230 transitions. [2024-11-27 19:52:02,581 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-11-27 19:52:02,581 INFO L175 Difference]: Start difference. First operand has 360 places, 2656 transitions, 74136 flow. Second operand 23 states and 230 transitions. [2024-11-27 19:52:02,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 3035 transitions, 90194 flow [2024-11-27 19:52:19,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 3035 transitions, 89426 flow, removed 257 selfloop flow, removed 12 redundant places. [2024-11-27 19:52:19,090 INFO L231 Difference]: Finished difference. Result has 379 places, 2938 transitions, 91098 flow [2024-11-27 19:52:19,092 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=73390, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2654, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2027, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=517, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=91098, PETRI_PLACES=379, PETRI_TRANSITIONS=2938} [2024-11-27 19:52:19,093 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 356 predicate places. [2024-11-27 19:52:19,093 INFO L471 AbstractCegarLoop]: Abstraction has has 379 places, 2938 transitions, 91098 flow [2024-11-27 19:52:19,093 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 6.0) internal successors, (102), 17 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:52:19,093 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 19:52:19,094 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:52:19,103 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade42209-dc35-48c1-8440-3466d45a7fc5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-27 19:52:19,294 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade42209-dc35-48c1-8440-3466d45a7fc5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-27 19:52:19,294 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 19:52:19,295 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:52:19,295 INFO L85 PathProgramCache]: Analyzing trace with hash 1798557726, now seen corresponding path program 14 times [2024-11-27 19:52:19,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:52:19,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172780409] [2024-11-27 19:52:19,295 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 19:52:19,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:52:19,309 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 19:52:19,309 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:52:19,491 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:52:19,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:52:19,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172780409] [2024-11-27 19:52:19,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172780409] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 19:52:19,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876126827] [2024-11-27 19:52:19,492 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 19:52:19,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:52:19,492 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade42209-dc35-48c1-8440-3466d45a7fc5/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:52:19,494 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade42209-dc35-48c1-8440-3466d45a7fc5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:52:19,498 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade42209-dc35-48c1-8440-3466d45a7fc5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-27 19:52:19,547 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 19:52:19,547 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:52:19,548 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-27 19:52:19,550 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:52:19,695 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:52:19,696 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 19:52:19,908 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:52:19,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876126827] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 19:52:19,908 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 19:52:19,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 16 [2024-11-27 19:52:19,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568766326] [2024-11-27 19:52:19,909 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 19:52:19,909 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-27 19:52:19,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:52:19,909 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-27 19:52:19,909 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2024-11-27 19:52:19,915 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 21 [2024-11-27 19:52:19,915 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 2938 transitions, 91098 flow. Second operand has 16 states, 16 states have (on average 6.25) internal successors, (100), 16 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:52:19,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 19:52:19,915 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 21 [2024-11-27 19:52:19,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 19:52:32,320 INFO L124 PetriNetUnfolderBase]: 7464/12583 cut-off events. [2024-11-27 19:52:32,320 INFO L125 PetriNetUnfolderBase]: For 533078/533106 co-relation queries the response was YES. [2024-11-27 19:52:32,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 160774 conditions, 12583 events. 7464/12583 cut-off events. For 533078/533106 co-relation queries the response was YES. Maximal size of possible extension queue 574. Compared 88495 event pairs, 441 based on Foata normal form. 14/12595 useless extension candidates. Maximal degree in co-relation 160118. Up to 3362 conditions per place. [2024-11-27 19:52:32,789 INFO L140 encePairwiseOnDemand]: 12/21 looper letters, 513 selfloop transitions, 2469 changer transitions 5/3065 dead transitions. [2024-11-27 19:52:32,789 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 3065 transitions, 99986 flow [2024-11-27 19:52:32,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-27 19:52:32,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-11-27 19:52:32,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 203 transitions. [2024-11-27 19:52:32,792 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4393939393939394 [2024-11-27 19:52:32,792 INFO L175 Difference]: Start difference. First operand has 379 places, 2938 transitions, 91098 flow. Second operand 22 states and 203 transitions. [2024-11-27 19:52:32,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 3065 transitions, 99986 flow [2024-11-27 19:52:51,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 3065 transitions, 99640 flow, removed 64 selfloop flow, removed 8 redundant places. [2024-11-27 19:52:51,234 INFO L231 Difference]: Finished difference. Result has 396 places, 3005 transitions, 100920 flow [2024-11-27 19:52:51,236 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=90681, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2935, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2397, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=496, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=100920, PETRI_PLACES=396, PETRI_TRANSITIONS=3005} [2024-11-27 19:52:51,236 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 373 predicate places. [2024-11-27 19:52:51,237 INFO L471 AbstractCegarLoop]: Abstraction has has 396 places, 3005 transitions, 100920 flow [2024-11-27 19:52:51,237 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 6.25) internal successors, (100), 16 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:52:51,237 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 19:52:51,237 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:52:51,244 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade42209-dc35-48c1-8440-3466d45a7fc5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-27 19:52:51,437 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade42209-dc35-48c1-8440-3466d45a7fc5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-27 19:52:51,438 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 19:52:51,438 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:52:51,438 INFO L85 PathProgramCache]: Analyzing trace with hash 348564442, now seen corresponding path program 15 times [2024-11-27 19:52:51,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:52:51,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621160062] [2024-11-27 19:52:51,439 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 19:52:51,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:52:51,452 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-27 19:52:51,453 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:52:51,649 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:52:51,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:52:51,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621160062] [2024-11-27 19:52:51,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621160062] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 19:52:51,650 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 19:52:51,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-27 19:52:51,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587018784] [2024-11-27 19:52:51,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 19:52:51,651 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-27 19:52:51,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:52:51,652 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-27 19:52:51,652 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-11-27 19:52:51,660 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 21 [2024-11-27 19:52:51,660 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 3005 transitions, 100920 flow. Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 8 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:52:51,660 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 19:52:51,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 21 [2024-11-27 19:52:51,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 19:53:07,054 INFO L124 PetriNetUnfolderBase]: 7491/12624 cut-off events. [2024-11-27 19:53:07,054 INFO L125 PetriNetUnfolderBase]: For 585990/586071 co-relation queries the response was YES. [2024-11-27 19:53:07,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 172880 conditions, 12624 events. 7491/12624 cut-off events. For 585990/586071 co-relation queries the response was YES. Maximal size of possible extension queue 573. Compared 88205 event pairs, 1762 based on Foata normal form. 2/12619 useless extension candidates. Maximal degree in co-relation 172167. Up to 9914 conditions per place. [2024-11-27 19:53:07,314 INFO L140 encePairwiseOnDemand]: 14/21 looper letters, 2698 selfloop transitions, 257 changer transitions 4/3037 dead transitions. [2024-11-27 19:53:07,314 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 402 places, 3037 transitions, 107395 flow [2024-11-27 19:53:07,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-27 19:53:07,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-27 19:53:07,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 71 transitions. [2024-11-27 19:53:07,315 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4226190476190476 [2024-11-27 19:53:07,315 INFO L175 Difference]: Start difference. First operand has 396 places, 3005 transitions, 100920 flow. Second operand 8 states and 71 transitions. [2024-11-27 19:53:07,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 402 places, 3037 transitions, 107395 flow