./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-more-inc-subseq.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 826ab2ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f954b82-6d75-4485-8577-90f90db70d43/bin/uautomizer-verify-qhAvR1uOyd/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f954b82-6d75-4485-8577-90f90db70d43/bin/uautomizer-verify-qhAvR1uOyd/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f954b82-6d75-4485-8577-90f90db70d43/bin/uautomizer-verify-qhAvR1uOyd/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f954b82-6d75-4485-8577-90f90db70d43/bin/uautomizer-verify-qhAvR1uOyd/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-more-inc-subseq.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f954b82-6d75-4485-8577-90f90db70d43/bin/uautomizer-verify-qhAvR1uOyd/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f954b82-6d75-4485-8577-90f90db70d43/bin/uautomizer-verify-qhAvR1uOyd --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 69f7b2e4777088b02df05d348ae0a210dcd9618a97428b10acd3ef63d9199610 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-13 13:19:48,681 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-13 13:19:48,785 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f954b82-6d75-4485-8577-90f90db70d43/bin/uautomizer-verify-qhAvR1uOyd/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-13 13:19:48,796 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-13 13:19:48,797 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-13 13:19:48,842 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-13 13:19:48,843 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-13 13:19:48,843 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-13 13:19:48,844 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-13 13:19:48,844 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-13 13:19:48,844 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-13 13:19:48,844 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-13 13:19:48,844 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-13 13:19:48,844 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-13 13:19:48,845 INFO L153 SettingsManager]: * Use SBE=true [2024-11-13 13:19:48,845 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-13 13:19:48,846 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-13 13:19:48,847 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-13 13:19:48,848 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-13 13:19:48,848 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-13 13:19:48,848 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-13 13:19:48,848 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-13 13:19:48,849 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-13 13:19:48,849 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-13 13:19:48,849 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-13 13:19:48,849 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-13 13:19:48,849 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-13 13:19:48,850 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-13 13:19:48,850 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-13 13:19:48,851 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-13 13:19:48,851 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-13 13:19:48,851 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-13 13:19:48,851 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-13 13:19:48,851 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-13 13:19:48,852 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-13 13:19:48,852 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-13 13:19:48,853 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-13 13:19:48,853 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-13 13:19:48,853 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-13 13:19:48,853 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-13 13:19:48,853 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-13 13:19:48,853 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-13 13:19:48,853 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_5f954b82-6d75-4485-8577-90f90db70d43/bin/uautomizer-verify-qhAvR1uOyd 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 -> 69f7b2e4777088b02df05d348ae0a210dcd9618a97428b10acd3ef63d9199610 [2024-11-13 13:19:49,244 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-13 13:19:49,254 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-13 13:19:49,257 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-13 13:19:49,259 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-13 13:19:49,259 INFO L274 PluginConnector]: CDTParser initialized [2024-11-13 13:19:49,261 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f954b82-6d75-4485-8577-90f90db70d43/bin/uautomizer-verify-qhAvR1uOyd/../../sv-benchmarks/c/weaver/popl20-more-inc-subseq.wvr.c Unable to find full path for "g++" [2024-11-13 13:19:51,248 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-13 13:19:51,527 INFO L384 CDTParser]: Found 1 translation units. [2024-11-13 13:19:51,527 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f954b82-6d75-4485-8577-90f90db70d43/sv-benchmarks/c/weaver/popl20-more-inc-subseq.wvr.c [2024-11-13 13:19:51,536 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f954b82-6d75-4485-8577-90f90db70d43/bin/uautomizer-verify-qhAvR1uOyd/data/76def4a15/2d8f471a4a66483cad7fbf61ce2ae5d7/FLAGe8c6fa702 [2024-11-13 13:19:51,552 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f954b82-6d75-4485-8577-90f90db70d43/bin/uautomizer-verify-qhAvR1uOyd/data/76def4a15/2d8f471a4a66483cad7fbf61ce2ae5d7 [2024-11-13 13:19:51,555 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-13 13:19:51,556 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-13 13:19:51,558 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-13 13:19:51,558 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-13 13:19:51,563 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-13 13:19:51,564 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 01:19:51" (1/1) ... [2024-11-13 13:19:51,565 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21026543 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:19:51, skipping insertion in model container [2024-11-13 13:19:51,566 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 01:19:51" (1/1) ... [2024-11-13 13:19:51,585 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-13 13:19:51,812 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_5f954b82-6d75-4485-8577-90f90db70d43/sv-benchmarks/c/weaver/popl20-more-inc-subseq.wvr.c[2950,2963] [2024-11-13 13:19:51,830 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 13:19:51,844 INFO L200 MainTranslator]: Completed pre-run [2024-11-13 13:19:51,880 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_5f954b82-6d75-4485-8577-90f90db70d43/sv-benchmarks/c/weaver/popl20-more-inc-subseq.wvr.c[2950,2963] [2024-11-13 13:19:51,889 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 13:19:51,910 INFO L204 MainTranslator]: Completed translation [2024-11-13 13:19:51,911 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:19:51 WrapperNode [2024-11-13 13:19:51,912 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-13 13:19:51,913 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-13 13:19:51,914 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-13 13:19:51,914 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-13 13:19:51,921 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:19:51" (1/1) ... [2024-11-13 13:19:51,929 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:19:51" (1/1) ... [2024-11-13 13:19:51,966 INFO L138 Inliner]: procedures = 23, calls = 35, calls flagged for inlining = 11, calls inlined = 13, statements flattened = 183 [2024-11-13 13:19:51,966 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-13 13:19:51,967 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-13 13:19:51,970 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-13 13:19:51,970 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-13 13:19:51,980 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:19:51" (1/1) ... [2024-11-13 13:19:51,981 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:19:51" (1/1) ... [2024-11-13 13:19:51,985 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:19:51" (1/1) ... [2024-11-13 13:19:52,017 INFO L175 MemorySlicer]: Split 10 memory accesses to 2 slices as follows [2, 8]. 80 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2024-11-13 13:19:52,021 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:19:51" (1/1) ... [2024-11-13 13:19:52,021 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:19:51" (1/1) ... [2024-11-13 13:19:52,033 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:19:51" (1/1) ... [2024-11-13 13:19:52,039 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:19:51" (1/1) ... [2024-11-13 13:19:52,040 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:19:51" (1/1) ... [2024-11-13 13:19:52,044 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:19:51" (1/1) ... [2024-11-13 13:19:52,048 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-13 13:19:52,049 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-13 13:19:52,049 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-13 13:19:52,049 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-13 13:19:52,053 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:19:51" (1/1) ... [2024-11-13 13:19:52,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-13 13:19:52,083 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f954b82-6d75-4485-8577-90f90db70d43/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:19:52,100 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f954b82-6d75-4485-8577-90f90db70d43/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-13 13:19:52,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f954b82-6d75-4485-8577-90f90db70d43/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-13 13:19:52,141 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-13 13:19:52,141 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-13 13:19:52,141 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-13 13:19:52,141 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-13 13:19:52,141 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-13 13:19:52,141 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-13 13:19:52,141 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-13 13:19:52,141 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-13 13:19:52,142 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-13 13:19:52,142 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-13 13:19:52,142 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-13 13:19:52,143 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-13 13:19:52,143 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-13 13:19:52,144 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-13 13:19:52,144 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-13 13:19:52,144 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-13 13:19:52,146 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-13 13:19:52,278 INFO L238 CfgBuilder]: Building ICFG [2024-11-13 13:19:52,281 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-13 13:19:52,829 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-13 13:19:52,829 INFO L287 CfgBuilder]: Performing block encoding [2024-11-13 13:19:53,317 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-13 13:19:53,319 INFO L316 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-13 13:19:53,319 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 01:19:53 BoogieIcfgContainer [2024-11-13 13:19:53,320 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-13 13:19:53,323 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-13 13:19:53,324 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-13 13:19:53,329 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-13 13:19:53,329 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 01:19:51" (1/3) ... [2024-11-13 13:19:53,331 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@676d2e97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 01:19:53, skipping insertion in model container [2024-11-13 13:19:53,331 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:19:51" (2/3) ... [2024-11-13 13:19:53,332 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@676d2e97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 01:19:53, skipping insertion in model container [2024-11-13 13:19:53,332 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 01:19:53" (3/3) ... [2024-11-13 13:19:53,334 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-inc-subseq.wvr.c [2024-11-13 13:19:53,352 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-13 13:19:53,354 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-more-inc-subseq.wvr.c that has 3 procedures, 27 locations, 1 initial locations, 4 loop locations, and 1 error locations. [2024-11-13 13:19:53,354 INFO L492 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-13 13:19:53,430 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-13 13:19:53,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 33 places, 31 transitions, 76 flow [2024-11-13 13:19:53,524 INFO L124 PetriNetUnfolderBase]: 5/29 cut-off events. [2024-11-13 13:19:53,532 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-13 13:19:53,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38 conditions, 29 events. 5/29 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 43 event pairs, 0 based on Foata normal form. 0/23 useless extension candidates. Maximal degree in co-relation 20. Up to 2 conditions per place. [2024-11-13 13:19:53,539 INFO L82 GeneralOperation]: Start removeDead. Operand has 33 places, 31 transitions, 76 flow [2024-11-13 13:19:53,545 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 30 places, 28 transitions, 68 flow [2024-11-13 13:19:53,554 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-13 13:19:53,572 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;@25c88833, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-13 13:19:53,572 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-11-13 13:19:53,585 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-13 13:19:53,585 INFO L124 PetriNetUnfolderBase]: 5/27 cut-off events. [2024-11-13 13:19:53,585 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-13 13:19:53,585 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:19:53,586 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:19:53,586 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 13:19:53,591 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:19:53,592 INFO L85 PathProgramCache]: Analyzing trace with hash -2142561023, now seen corresponding path program 1 times [2024-11-13 13:19:53,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:19:53,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475315633] [2024-11-13 13:19:53,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:19:53,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:19:53,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:19:54,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:19:54,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:19:54,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475315633] [2024-11-13 13:19:54,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475315633] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 13:19:54,092 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 13:19:54,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-13 13:19:54,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147152908] [2024-11-13 13:19:54,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 13:19:54,105 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 13:19:54,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:19:54,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 13:19:54,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-13 13:19:54,151 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-11-13 13:19:54,153 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 28 transitions, 68 flow. Second operand has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:19:54,154 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:19:54,154 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-11-13 13:19:54,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:19:54,456 INFO L124 PetriNetUnfolderBase]: 202/345 cut-off events. [2024-11-13 13:19:54,457 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2024-11-13 13:19:54,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 697 conditions, 345 events. 202/345 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1380 event pairs, 51 based on Foata normal form. 0/297 useless extension candidates. Maximal degree in co-relation 651. Up to 188 conditions per place. [2024-11-13 13:19:54,464 INFO L140 encePairwiseOnDemand]: 27/31 looper letters, 31 selfloop transitions, 3 changer transitions 0/40 dead transitions. [2024-11-13 13:19:54,466 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 40 transitions, 163 flow [2024-11-13 13:19:54,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 13:19:54,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-13 13:19:54,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 67 transitions. [2024-11-13 13:19:54,481 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5403225806451613 [2024-11-13 13:19:54,483 INFO L175 Difference]: Start difference. First operand has 30 places, 28 transitions, 68 flow. Second operand 4 states and 67 transitions. [2024-11-13 13:19:54,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 40 transitions, 163 flow [2024-11-13 13:19:54,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 40 transitions, 153 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-13 13:19:54,492 INFO L231 Difference]: Finished difference. Result has 30 places, 29 transitions, 74 flow [2024-11-13 13:19:54,495 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=74, PETRI_PLACES=30, PETRI_TRANSITIONS=29} [2024-11-13 13:19:54,500 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 0 predicate places. [2024-11-13 13:19:54,501 INFO L471 AbstractCegarLoop]: Abstraction has has 30 places, 29 transitions, 74 flow [2024-11-13 13:19:54,501 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:19:54,503 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:19:54,503 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:19:54,503 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-13 13:19:54,504 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 13:19:54,504 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:19:54,504 INFO L85 PathProgramCache]: Analyzing trace with hash -1020363810, now seen corresponding path program 1 times [2024-11-13 13:19:54,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:19:54,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969607250] [2024-11-13 13:19:54,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:19:54,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:19:54,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:19:54,730 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 13:19:54,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:19:54,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969607250] [2024-11-13 13:19:54,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969607250] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 13:19:54,731 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 13:19:54,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-13 13:19:54,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947674922] [2024-11-13 13:19:54,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 13:19:54,733 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-13 13:19:54,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:19:54,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-13 13:19:54,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 13:19:54,747 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-11-13 13:19:54,748 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 29 transitions, 74 flow. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:19:54,748 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:19:54,748 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-11-13 13:19:54,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:19:54,899 INFO L124 PetriNetUnfolderBase]: 202/370 cut-off events. [2024-11-13 13:19:54,900 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2024-11-13 13:19:54,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 748 conditions, 370 events. 202/370 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1558 event pairs, 126 based on Foata normal form. 1/335 useless extension candidates. Maximal degree in co-relation 285. Up to 320 conditions per place. [2024-11-13 13:19:54,904 INFO L140 encePairwiseOnDemand]: 28/31 looper letters, 22 selfloop transitions, 2 changer transitions 0/30 dead transitions. [2024-11-13 13:19:54,904 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 30 transitions, 124 flow [2024-11-13 13:19:54,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-13 13:19:54,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-13 13:19:54,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 48 transitions. [2024-11-13 13:19:54,906 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5161290322580645 [2024-11-13 13:19:54,906 INFO L175 Difference]: Start difference. First operand has 30 places, 29 transitions, 74 flow. Second operand 3 states and 48 transitions. [2024-11-13 13:19:54,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 30 transitions, 124 flow [2024-11-13 13:19:54,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 30 transitions, 120 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-13 13:19:54,908 INFO L231 Difference]: Finished difference. Result has 31 places, 30 transitions, 82 flow [2024-11-13 13:19:54,908 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=82, PETRI_PLACES=31, PETRI_TRANSITIONS=30} [2024-11-13 13:19:54,909 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 1 predicate places. [2024-11-13 13:19:54,909 INFO L471 AbstractCegarLoop]: Abstraction has has 31 places, 30 transitions, 82 flow [2024-11-13 13:19:54,909 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:19:54,909 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:19:54,909 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:19:54,910 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-13 13:19:54,910 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 13:19:54,910 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:19:54,911 INFO L85 PathProgramCache]: Analyzing trace with hash 1828755507, now seen corresponding path program 1 times [2024-11-13 13:19:54,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:19:54,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469944325] [2024-11-13 13:19:54,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:19:54,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:19:54,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:19:55,181 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-13 13:19:55,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:19:55,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469944325] [2024-11-13 13:19:55,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469944325] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 13:19:55,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 13:19:55,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-13 13:19:55,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138356663] [2024-11-13 13:19:55,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 13:19:55,182 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-13 13:19:55,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:19:55,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-13 13:19:55,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 13:19:55,186 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-11-13 13:19:55,186 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 30 transitions, 82 flow. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:19:55,186 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:19:55,186 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-11-13 13:19:55,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:19:55,373 INFO L124 PetriNetUnfolderBase]: 257/478 cut-off events. [2024-11-13 13:19:55,373 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2024-11-13 13:19:55,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 967 conditions, 478 events. 257/478 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2116 event pairs, 94 based on Foata normal form. 1/437 useless extension candidates. Maximal degree in co-relation 951. Up to 216 conditions per place. [2024-11-13 13:19:55,381 INFO L140 encePairwiseOnDemand]: 28/31 looper letters, 34 selfloop transitions, 2 changer transitions 2/44 dead transitions. [2024-11-13 13:19:55,381 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 44 transitions, 194 flow [2024-11-13 13:19:55,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-13 13:19:55,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-13 13:19:55,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 60 transitions. [2024-11-13 13:19:55,384 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6451612903225806 [2024-11-13 13:19:55,385 INFO L175 Difference]: Start difference. First operand has 31 places, 30 transitions, 82 flow. Second operand 3 states and 60 transitions. [2024-11-13 13:19:55,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 44 transitions, 194 flow [2024-11-13 13:19:55,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 44 transitions, 190 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-13 13:19:55,389 INFO L231 Difference]: Finished difference. Result has 33 places, 31 transitions, 90 flow [2024-11-13 13:19:55,390 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=90, PETRI_PLACES=33, PETRI_TRANSITIONS=31} [2024-11-13 13:19:55,391 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 3 predicate places. [2024-11-13 13:19:55,391 INFO L471 AbstractCegarLoop]: Abstraction has has 33 places, 31 transitions, 90 flow [2024-11-13 13:19:55,391 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:19:55,392 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:19:55,392 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:19:55,392 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-13 13:19:55,392 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 13:19:55,393 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:19:55,394 INFO L85 PathProgramCache]: Analyzing trace with hash 1709349724, now seen corresponding path program 1 times [2024-11-13 13:19:55,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:19:55,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855179528] [2024-11-13 13:19:55,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:19:55,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:19:55,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:19:55,591 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 13:19:55,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:19:55,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855179528] [2024-11-13 13:19:55,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855179528] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 13:19:55,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 13:19:55,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-13 13:19:55,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984633615] [2024-11-13 13:19:55,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 13:19:55,592 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-13 13:19:55,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:19:55,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-13 13:19:55,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 13:19:55,601 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-11-13 13:19:55,602 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 31 transitions, 90 flow. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:19:55,603 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:19:55,603 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-11-13 13:19:55,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:19:55,760 INFO L124 PetriNetUnfolderBase]: 250/472 cut-off events. [2024-11-13 13:19:55,760 INFO L125 PetriNetUnfolderBase]: For 35/35 co-relation queries the response was YES. [2024-11-13 13:19:55,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1045 conditions, 472 events. 250/472 cut-off events. For 35/35 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 2061 event pairs, 102 based on Foata normal form. 11/450 useless extension candidates. Maximal degree in co-relation 1022. Up to 314 conditions per place. [2024-11-13 13:19:55,765 INFO L140 encePairwiseOnDemand]: 28/31 looper letters, 32 selfloop transitions, 2 changer transitions 4/44 dead transitions. [2024-11-13 13:19:55,766 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 44 transitions, 201 flow [2024-11-13 13:19:55,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-13 13:19:55,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-13 13:19:55,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 59 transitions. [2024-11-13 13:19:55,767 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6344086021505376 [2024-11-13 13:19:55,767 INFO L175 Difference]: Start difference. First operand has 33 places, 31 transitions, 90 flow. Second operand 3 states and 59 transitions. [2024-11-13 13:19:55,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 44 transitions, 201 flow [2024-11-13 13:19:55,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 44 transitions, 199 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-13 13:19:55,769 INFO L231 Difference]: Finished difference. Result has 35 places, 32 transitions, 100 flow [2024-11-13 13:19:55,769 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=35, PETRI_TRANSITIONS=32} [2024-11-13 13:19:55,773 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 5 predicate places. [2024-11-13 13:19:55,773 INFO L471 AbstractCegarLoop]: Abstraction has has 35 places, 32 transitions, 100 flow [2024-11-13 13:19:55,773 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:19:55,774 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:19:55,774 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:19:55,775 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-13 13:19:55,775 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 13:19:55,775 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:19:55,776 INFO L85 PathProgramCache]: Analyzing trace with hash -1708676847, now seen corresponding path program 1 times [2024-11-13 13:19:55,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:19:55,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637377219] [2024-11-13 13:19:55,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:19:55,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:19:55,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:19:56,037 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 13:19:56,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:19:56,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637377219] [2024-11-13 13:19:56,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637377219] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 13:19:56,037 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 13:19:56,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-13 13:19:56,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877221748] [2024-11-13 13:19:56,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 13:19:56,038 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 13:19:56,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:19:56,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 13:19:56,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 13:19:56,039 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-11-13 13:19:56,039 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 32 transitions, 100 flow. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:19:56,039 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:19:56,039 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-11-13 13:19:56,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:19:56,294 INFO L124 PetriNetUnfolderBase]: 307/599 cut-off events. [2024-11-13 13:19:56,298 INFO L125 PetriNetUnfolderBase]: For 73/80 co-relation queries the response was YES. [2024-11-13 13:19:56,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1379 conditions, 599 events. 307/599 cut-off events. For 73/80 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2846 event pairs, 247 based on Foata normal form. 12/564 useless extension candidates. Maximal degree in co-relation 1079. Up to 433 conditions per place. [2024-11-13 13:19:56,303 INFO L140 encePairwiseOnDemand]: 27/31 looper letters, 25 selfloop transitions, 2 changer transitions 17/50 dead transitions. [2024-11-13 13:19:56,305 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 50 transitions, 242 flow [2024-11-13 13:19:56,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 13:19:56,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-13 13:19:56,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 71 transitions. [2024-11-13 13:19:56,309 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5725806451612904 [2024-11-13 13:19:56,309 INFO L175 Difference]: Start difference. First operand has 35 places, 32 transitions, 100 flow. Second operand 4 states and 71 transitions. [2024-11-13 13:19:56,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 50 transitions, 242 flow [2024-11-13 13:19:56,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 50 transitions, 240 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-13 13:19:56,317 INFO L231 Difference]: Finished difference. Result has 39 places, 33 transitions, 112 flow [2024-11-13 13:19:56,317 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=112, PETRI_PLACES=39, PETRI_TRANSITIONS=33} [2024-11-13 13:19:56,318 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 9 predicate places. [2024-11-13 13:19:56,321 INFO L471 AbstractCegarLoop]: Abstraction has has 39 places, 33 transitions, 112 flow [2024-11-13 13:19:56,322 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:19:56,322 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:19:56,322 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:19:56,322 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-13 13:19:56,322 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 13:19:56,323 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:19:56,323 INFO L85 PathProgramCache]: Analyzing trace with hash 1705693793, now seen corresponding path program 1 times [2024-11-13 13:19:56,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:19:56,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863881628] [2024-11-13 13:19:56,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:19:56,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:19:56,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:20:00,241 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:20:00,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:20:00,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863881628] [2024-11-13 13:20:00,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863881628] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 13:20:00,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001926853] [2024-11-13 13:20:00,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:20:00,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:20:00,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f954b82-6d75-4485-8577-90f90db70d43/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:20:00,245 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f954b82-6d75-4485-8577-90f90db70d43/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:20:00,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f954b82-6d75-4485-8577-90f90db70d43/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-13 13:20:00,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:20:00,405 INFO L255 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-11-13 13:20:00,417 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:20:00,752 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-13 13:20:01,625 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-11-13 13:20:01,625 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2024-11-13 13:20:01,715 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:20:01,716 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 13:20:02,883 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 13:20:02,884 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 154 treesize of output 150 [2024-11-13 13:20:02,917 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 13:20:02,917 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 40 [2024-11-13 13:20:03,083 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 13:20:03,084 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 222 treesize of output 238 [2024-11-13 13:20:05,680 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 13:20:05,680 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 75 [2024-11-13 13:20:05,732 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 30 [2024-11-13 13:20:06,051 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:20:06,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2001926853] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 13:20:06,052 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 13:20:06,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 11] total 32 [2024-11-13 13:20:06,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136310461] [2024-11-13 13:20:06,052 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 13:20:06,053 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-13 13:20:06,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:20:06,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-13 13:20:06,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=867, Unknown=0, NotChecked=0, Total=1056 [2024-11-13 13:20:06,160 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-11-13 13:20:06,160 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 33 transitions, 112 flow. Second operand has 33 states, 33 states have (on average 7.181818181818182) internal successors, (237), 33 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:20:06,161 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:20:06,161 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-11-13 13:20:06,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:20:11,597 INFO L124 PetriNetUnfolderBase]: 1325/2249 cut-off events. [2024-11-13 13:20:11,597 INFO L125 PetriNetUnfolderBase]: For 393/393 co-relation queries the response was YES. [2024-11-13 13:20:11,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5331 conditions, 2249 events. 1325/2249 cut-off events. For 393/393 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 11129 event pairs, 82 based on Foata normal form. 3/1970 useless extension candidates. Maximal degree in co-relation 5313. Up to 381 conditions per place. [2024-11-13 13:20:11,614 INFO L140 encePairwiseOnDemand]: 15/31 looper letters, 198 selfloop transitions, 85 changer transitions 65/351 dead transitions. [2024-11-13 13:20:11,614 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 351 transitions, 1721 flow [2024-11-13 13:20:11,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2024-11-13 13:20:11,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2024-11-13 13:20:11,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 545 transitions. [2024-11-13 13:20:11,622 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4185867895545315 [2024-11-13 13:20:11,622 INFO L175 Difference]: Start difference. First operand has 39 places, 33 transitions, 112 flow. Second operand 42 states and 545 transitions. [2024-11-13 13:20:11,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 351 transitions, 1721 flow [2024-11-13 13:20:11,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 351 transitions, 1705 flow, removed 7 selfloop flow, removed 2 redundant places. [2024-11-13 13:20:11,630 INFO L231 Difference]: Finished difference. Result has 100 places, 125 transitions, 827 flow [2024-11-13 13:20:11,630 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=827, PETRI_PLACES=100, PETRI_TRANSITIONS=125} [2024-11-13 13:20:11,631 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 70 predicate places. [2024-11-13 13:20:11,631 INFO L471 AbstractCegarLoop]: Abstraction has has 100 places, 125 transitions, 827 flow [2024-11-13 13:20:11,631 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 7.181818181818182) internal successors, (237), 33 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:20:11,631 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:20:11,632 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:20:11,654 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f954b82-6d75-4485-8577-90f90db70d43/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-13 13:20:11,835 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f954b82-6d75-4485-8577-90f90db70d43/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-13 13:20:11,836 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 13:20:11,837 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:20:11,837 INFO L85 PathProgramCache]: Analyzing trace with hash 1098780346, now seen corresponding path program 1 times [2024-11-13 13:20:11,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:20:11,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029172374] [2024-11-13 13:20:11,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:20:11,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:20:11,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:20:12,044 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 13:20:12,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:20:12,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029172374] [2024-11-13 13:20:12,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029172374] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 13:20:12,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908017559] [2024-11-13 13:20:12,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:20:12,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:20:12,044 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f954b82-6d75-4485-8577-90f90db70d43/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:20:12,047 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f954b82-6d75-4485-8577-90f90db70d43/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:20:12,048 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f954b82-6d75-4485-8577-90f90db70d43/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-13 13:20:12,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:20:12,175 INFO L255 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-13 13:20:12,177 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:20:12,306 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 13:20:12,307 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 13:20:12,414 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 13:20:12,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908017559] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 13:20:12,414 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 13:20:12,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2024-11-13 13:20:12,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390036056] [2024-11-13 13:20:12,415 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 13:20:12,415 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-13 13:20:12,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:20:12,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-13 13:20:12,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2024-11-13 13:20:12,497 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-11-13 13:20:12,498 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 125 transitions, 827 flow. Second operand has 15 states, 15 states have (on average 11.133333333333333) internal successors, (167), 15 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:20:12,498 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:20:12,498 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-11-13 13:20:12,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:20:13,092 INFO L124 PetriNetUnfolderBase]: 880/1742 cut-off events. [2024-11-13 13:20:13,092 INFO L125 PetriNetUnfolderBase]: For 7268/7386 co-relation queries the response was YES. [2024-11-13 13:20:13,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6968 conditions, 1742 events. 880/1742 cut-off events. For 7268/7386 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 9813 event pairs, 204 based on Foata normal form. 60/1696 useless extension candidates. Maximal degree in co-relation 6916. Up to 801 conditions per place. [2024-11-13 13:20:13,118 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 185 selfloop transitions, 36 changer transitions 4/236 dead transitions. [2024-11-13 13:20:13,118 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 236 transitions, 1967 flow [2024-11-13 13:20:13,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-13 13:20:13,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-13 13:20:13,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 139 transitions. [2024-11-13 13:20:13,121 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4982078853046595 [2024-11-13 13:20:13,121 INFO L175 Difference]: Start difference. First operand has 100 places, 125 transitions, 827 flow. Second operand 9 states and 139 transitions. [2024-11-13 13:20:13,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 236 transitions, 1967 flow [2024-11-13 13:20:13,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 236 transitions, 1769 flow, removed 87 selfloop flow, removed 5 redundant places. [2024-11-13 13:20:13,224 INFO L231 Difference]: Finished difference. Result has 102 places, 141 transitions, 929 flow [2024-11-13 13:20:13,224 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=711, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=929, PETRI_PLACES=102, PETRI_TRANSITIONS=141} [2024-11-13 13:20:13,225 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 72 predicate places. [2024-11-13 13:20:13,225 INFO L471 AbstractCegarLoop]: Abstraction has has 102 places, 141 transitions, 929 flow [2024-11-13 13:20:13,225 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 11.133333333333333) internal successors, (167), 15 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:20:13,226 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:20:13,226 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:20:13,254 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f954b82-6d75-4485-8577-90f90db70d43/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-13 13:20:13,429 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f954b82-6d75-4485-8577-90f90db70d43/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-13 13:20:13,429 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 13:20:13,430 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:20:13,430 INFO L85 PathProgramCache]: Analyzing trace with hash 1208534501, now seen corresponding path program 2 times [2024-11-13 13:20:13,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:20:13,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567493705] [2024-11-13 13:20:13,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:20:13,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:20:13,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:20:13,810 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-13 13:20:13,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:20:13,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567493705] [2024-11-13 13:20:13,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567493705] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 13:20:13,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 13:20:13,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-13 13:20:13,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472466109] [2024-11-13 13:20:13,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 13:20:13,812 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-13 13:20:13,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:20:13,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-13 13:20:13,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-13 13:20:13,836 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-11-13 13:20:13,836 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 141 transitions, 929 flow. Second operand has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:20:13,836 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:20:13,836 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-11-13 13:20:13,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:20:14,198 INFO L124 PetriNetUnfolderBase]: 720/1446 cut-off events. [2024-11-13 13:20:14,198 INFO L125 PetriNetUnfolderBase]: For 4634/4705 co-relation queries the response was YES. [2024-11-13 13:20:14,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5473 conditions, 1446 events. 720/1446 cut-off events. For 4634/4705 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 7676 event pairs, 145 based on Foata normal form. 12/1393 useless extension candidates. Maximal degree in co-relation 4889. Up to 910 conditions per place. [2024-11-13 13:20:14,214 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 112 selfloop transitions, 38 changer transitions 0/161 dead transitions. [2024-11-13 13:20:14,214 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 161 transitions, 1334 flow [2024-11-13 13:20:14,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-13 13:20:14,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-13 13:20:14,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 90 transitions. [2024-11-13 13:20:14,215 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4838709677419355 [2024-11-13 13:20:14,215 INFO L175 Difference]: Start difference. First operand has 102 places, 141 transitions, 929 flow. Second operand 6 states and 90 transitions. [2024-11-13 13:20:14,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 161 transitions, 1334 flow [2024-11-13 13:20:14,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 161 transitions, 1293 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-11-13 13:20:14,251 INFO L231 Difference]: Finished difference. Result has 103 places, 141 transitions, 1012 flow [2024-11-13 13:20:14,252 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=846, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1012, PETRI_PLACES=103, PETRI_TRANSITIONS=141} [2024-11-13 13:20:14,252 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 73 predicate places. [2024-11-13 13:20:14,253 INFO L471 AbstractCegarLoop]: Abstraction has has 103 places, 141 transitions, 1012 flow [2024-11-13 13:20:14,253 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:20:14,253 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:20:14,253 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:20:14,254 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-13 13:20:14,254 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 13:20:14,254 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:20:14,254 INFO L85 PathProgramCache]: Analyzing trace with hash -1581401244, now seen corresponding path program 2 times [2024-11-13 13:20:14,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:20:14,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920775803] [2024-11-13 13:20:14,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:20:14,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:20:14,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:20:14,516 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 13:20:14,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:20:14,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920775803] [2024-11-13 13:20:14,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920775803] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 13:20:14,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584370799] [2024-11-13 13:20:14,517 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 13:20:14,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:20:14,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f954b82-6d75-4485-8577-90f90db70d43/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:20:14,520 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f954b82-6d75-4485-8577-90f90db70d43/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:20:14,522 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f954b82-6d75-4485-8577-90f90db70d43/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-13 13:20:14,661 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 13:20:14,661 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 13:20:14,663 INFO L255 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-13 13:20:14,664 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:20:14,727 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-13 13:20:14,727 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 13:20:14,891 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-13 13:20:14,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584370799] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 13:20:14,891 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 13:20:14,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 3, 4] total 10 [2024-11-13 13:20:14,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166958632] [2024-11-13 13:20:14,892 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 13:20:14,892 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-13 13:20:14,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:20:14,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-13 13:20:14,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-11-13 13:20:14,927 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-11-13 13:20:14,928 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 141 transitions, 1012 flow. Second operand has 11 states, 11 states have (on average 13.272727272727273) internal successors, (146), 11 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:20:14,928 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:20:14,928 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-11-13 13:20:14,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:20:15,708 INFO L124 PetriNetUnfolderBase]: 1215/2430 cut-off events. [2024-11-13 13:20:15,708 INFO L125 PetriNetUnfolderBase]: For 11670/11784 co-relation queries the response was YES. [2024-11-13 13:20:15,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9847 conditions, 2430 events. 1215/2430 cut-off events. For 11670/11784 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 13277 event pairs, 181 based on Foata normal form. 102/2376 useless extension candidates. Maximal degree in co-relation 5320. Up to 493 conditions per place. [2024-11-13 13:20:15,747 INFO L140 encePairwiseOnDemand]: 26/31 looper letters, 162 selfloop transitions, 50 changer transitions 14/237 dead transitions. [2024-11-13 13:20:15,747 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 237 transitions, 1979 flow [2024-11-13 13:20:15,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-13 13:20:15,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-13 13:20:15,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 192 transitions. [2024-11-13 13:20:15,749 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6193548387096774 [2024-11-13 13:20:15,749 INFO L175 Difference]: Start difference. First operand has 103 places, 141 transitions, 1012 flow. Second operand 10 states and 192 transitions. [2024-11-13 13:20:15,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 237 transitions, 1979 flow [2024-11-13 13:20:15,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 237 transitions, 1811 flow, removed 63 selfloop flow, removed 7 redundant places. [2024-11-13 13:20:15,796 INFO L231 Difference]: Finished difference. Result has 102 places, 139 transitions, 948 flow [2024-11-13 13:20:15,796 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=742, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=948, PETRI_PLACES=102, PETRI_TRANSITIONS=139} [2024-11-13 13:20:15,797 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 72 predicate places. [2024-11-13 13:20:15,797 INFO L471 AbstractCegarLoop]: Abstraction has has 102 places, 139 transitions, 948 flow [2024-11-13 13:20:15,797 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.272727272727273) internal successors, (146), 11 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:20:15,797 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:20:15,798 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:20:15,820 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f954b82-6d75-4485-8577-90f90db70d43/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-13 13:20:15,998 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f954b82-6d75-4485-8577-90f90db70d43/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:20:15,998 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 13:20:15,999 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:20:15,999 INFO L85 PathProgramCache]: Analyzing trace with hash 1495964693, now seen corresponding path program 3 times [2024-11-13 13:20:15,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:20:15,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723367829] [2024-11-13 13:20:15,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:20:15,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:20:16,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:20:16,213 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-13 13:20:16,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:20:16,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723367829] [2024-11-13 13:20:16,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723367829] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 13:20:16,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064614829] [2024-11-13 13:20:16,214 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 13:20:16,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:20:16,214 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f954b82-6d75-4485-8577-90f90db70d43/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:20:16,217 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f954b82-6d75-4485-8577-90f90db70d43/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:20:16,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f954b82-6d75-4485-8577-90f90db70d43/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-13 13:20:16,343 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-13 13:20:16,343 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 13:20:16,345 INFO L255 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-13 13:20:16,347 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:20:16,500 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 13:20:16,500 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 13:20:16,666 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 13:20:16,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064614829] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 13:20:16,666 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 13:20:16,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2024-11-13 13:20:16,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123181233] [2024-11-13 13:20:16,666 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 13:20:16,667 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-13 13:20:16,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:20:16,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-13 13:20:16,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2024-11-13 13:20:16,708 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-11-13 13:20:16,708 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 139 transitions, 948 flow. Second operand has 12 states, 12 states have (on average 12.416666666666666) internal successors, (149), 12 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:20:16,709 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:20:16,709 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-11-13 13:20:16,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:20:17,154 INFO L124 PetriNetUnfolderBase]: 629/1320 cut-off events. [2024-11-13 13:20:17,154 INFO L125 PetriNetUnfolderBase]: For 4032/4089 co-relation queries the response was YES. [2024-11-13 13:20:17,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4935 conditions, 1320 events. 629/1320 cut-off events. For 4032/4089 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 6454 event pairs, 356 based on Foata normal form. 21/1252 useless extension candidates. Maximal degree in co-relation 3872. Up to 864 conditions per place. [2024-11-13 13:20:17,165 INFO L140 encePairwiseOnDemand]: 26/31 looper letters, 52 selfloop transitions, 3 changer transitions 56/117 dead transitions. [2024-11-13 13:20:17,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 117 transitions, 985 flow [2024-11-13 13:20:17,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-13 13:20:17,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-13 13:20:17,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-11-13 13:20:17,167 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5161290322580645 [2024-11-13 13:20:17,167 INFO L175 Difference]: Start difference. First operand has 102 places, 139 transitions, 948 flow. Second operand 7 states and 112 transitions. [2024-11-13 13:20:17,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 117 transitions, 985 flow [2024-11-13 13:20:17,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 117 transitions, 902 flow, removed 17 selfloop flow, removed 13 redundant places. [2024-11-13 13:20:17,185 INFO L231 Difference]: Finished difference. Result has 86 places, 61 transitions, 345 flow [2024-11-13 13:20:17,185 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=577, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=345, PETRI_PLACES=86, PETRI_TRANSITIONS=61} [2024-11-13 13:20:17,186 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 56 predicate places. [2024-11-13 13:20:17,186 INFO L471 AbstractCegarLoop]: Abstraction has has 86 places, 61 transitions, 345 flow [2024-11-13 13:20:17,186 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 12.416666666666666) internal successors, (149), 12 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:20:17,186 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:20:17,187 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:20:17,208 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f954b82-6d75-4485-8577-90f90db70d43/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-13 13:20:17,390 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f954b82-6d75-4485-8577-90f90db70d43/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-13 13:20:17,390 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 13:20:17,391 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:20:17,391 INFO L85 PathProgramCache]: Analyzing trace with hash 190346755, now seen corresponding path program 4 times [2024-11-13 13:20:17,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:20:17,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131037463] [2024-11-13 13:20:17,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:20:17,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:20:17,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:20:19,608 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-13 13:20:19,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:20:19,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131037463] [2024-11-13 13:20:19,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131037463] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 13:20:19,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94408935] [2024-11-13 13:20:19,609 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-13 13:20:19,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:20:19,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f954b82-6d75-4485-8577-90f90db70d43/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:20:19,613 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f954b82-6d75-4485-8577-90f90db70d43/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:20:19,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f954b82-6d75-4485-8577-90f90db70d43/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-13 13:20:19,762 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-13 13:20:19,763 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 13:20:19,765 INFO L255 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-11-13 13:20:19,768 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:20:21,456 INFO L349 Elim1Store]: treesize reduction 28, result has 56.9 percent of original size [2024-11-13 13:20:21,456 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 56 treesize of output 52 [2024-11-13 13:20:21,591 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-13 13:20:21,591 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 13:20:26,229 INFO L349 Elim1Store]: treesize reduction 164, result has 86.0 percent of original size [2024-11-13 13:20:26,230 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 233 treesize of output 1066 [2024-11-13 13:30:53,656 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f954b82-6d75-4485-8577-90f90db70d43/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 101 [2024-11-13 13:30:53,657 WARN L249 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f954b82-6d75-4485-8577-90f90db70d43/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) stderr output: (error "out of memory") [2024-11-13 13:30:53,658 WARN L320 FreeRefinementEngine]: Global settings require throwing the following exception [2024-11-13 13:30:53,678 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f954b82-6d75-4485-8577-90f90db70d43/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-13 13:30:53,862 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f954b82-6d75-4485-8577-90f90db70d43/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-13 13:30:53,863 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f954b82-6d75-4485-8577-90f90db70d43/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:262) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseSuccess(Executor.java:277) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.push(Scriptor.java:133) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript.push(DiffWrapperScript.java:90) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.push(WrapperScript.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.scripttransfer.HistoryRecordingScript.push(HistoryRecordingScript.java:107) at de.uni_freiburg.informatik.ultimate.logic.Util.checkSat(Util.java:48) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.checkRedundancy(SimplifyDDA2.java:275) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.convertForPreprocessedInputTerms(SimplifyDDA2.java:499) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.convert(SimplifyDDA2.java:484) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.convert(SimplifyDDA2.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:88) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:84) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.simplify(SimplifyDDA2.java:590) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplify(SmtUtils.java:245) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplifyWithStatistics(SmtUtils.java:318) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify(QuantifierPusher.java:728) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:133) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:209) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:100) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:84) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:297) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.pushMinionEliminatees(QuantifierPushUtilsForSubsetPush.java:255) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.sequentialSubsetPush(QuantifierPushUtilsForSubsetPush.java:151) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:337) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:189) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:209) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:100) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:84) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:297) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:283) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.eliminate(PartialQuantifierElimination.java:51) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:234) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:416) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeBackwardSequence(IterativePredicateTransformer.java:395) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeWeakestPreconditionSequence(IterativePredicateTransformer.java:267) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:324) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:180) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:159) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:407) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:342) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:324) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:429) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:315) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:239) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:168) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:143) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1518) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:701) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:383) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:258) ... 69 more [2024-11-13 13:30:53,870 INFO L158 Benchmark]: Toolchain (without parser) took 662313.19ms. Allocated memory was 117.4MB in the beginning and 1.5GB in the end (delta: 1.4GB). Free memory was 93.5MB in the beginning and 992.7MB in the end (delta: -899.2MB). Peak memory consumption was 940.7MB. Max. memory is 16.1GB. [2024-11-13 13:30:53,870 INFO L158 Benchmark]: CDTParser took 1.25ms. Allocated memory is still 142.6MB. Free memory is still 79.2MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-13 13:30:53,870 INFO L158 Benchmark]: CACSL2BoogieTranslator took 354.73ms. Allocated memory is still 117.4MB. Free memory was 93.5MB in the beginning and 81.2MB in the end (delta: 12.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-13 13:30:53,870 INFO L158 Benchmark]: Boogie Procedure Inliner took 53.31ms. Allocated memory is still 117.4MB. Free memory was 81.2MB in the beginning and 79.4MB in the end (delta: 1.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-13 13:30:53,871 INFO L158 Benchmark]: Boogie Preprocessor took 81.03ms. Allocated memory is still 117.4MB. Free memory was 79.4MB in the beginning and 77.2MB in the end (delta: 2.2MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-13 13:30:53,871 INFO L158 Benchmark]: RCFGBuilder took 1271.58ms. Allocated memory is still 117.4MB. Free memory was 76.9MB in the beginning and 80.0MB in the end (delta: -3.1MB). Peak memory consumption was 47.1MB. Max. memory is 16.1GB. [2024-11-13 13:30:53,871 INFO L158 Benchmark]: TraceAbstraction took 660545.71ms. Allocated memory was 117.4MB in the beginning and 1.5GB in the end (delta: 1.4GB). Free memory was 79.5MB in the beginning and 992.7MB in the end (delta: -913.2MB). Peak memory consumption was 927.2MB. Max. memory is 16.1GB. [2024-11-13 13:30:53,874 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.25ms. Allocated memory is still 142.6MB. Free memory is still 79.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 354.73ms. Allocated memory is still 117.4MB. Free memory was 93.5MB in the beginning and 81.2MB in the end (delta: 12.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 53.31ms. Allocated memory is still 117.4MB. Free memory was 81.2MB in the beginning and 79.4MB in the end (delta: 1.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Preprocessor took 81.03ms. Allocated memory is still 117.4MB. Free memory was 79.4MB in the beginning and 77.2MB in the end (delta: 2.2MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 1271.58ms. Allocated memory is still 117.4MB. Free memory was 76.9MB in the beginning and 80.0MB in the end (delta: -3.1MB). Peak memory consumption was 47.1MB. Max. memory is 16.1GB. * TraceAbstraction took 660545.71ms. Allocated memory was 117.4MB in the beginning and 1.5GB in the end (delta: 1.4GB). Free memory was 79.5MB in the beginning and 992.7MB in the end (delta: -913.2MB). Peak memory consumption was 927.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f954b82-6d75-4485-8577-90f90db70d43/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f954b82-6d75-4485-8577-90f90db70d43/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") : de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:262) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f954b82-6d75-4485-8577-90f90db70d43/bin/uautomizer-verify-qhAvR1uOyd/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f954b82-6d75-4485-8577-90f90db70d43/bin/uautomizer-verify-qhAvR1uOyd/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f954b82-6d75-4485-8577-90f90db70d43/bin/uautomizer-verify-qhAvR1uOyd/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f954b82-6d75-4485-8577-90f90db70d43/bin/uautomizer-verify-qhAvR1uOyd/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-more-inc-subseq.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f954b82-6d75-4485-8577-90f90db70d43/bin/uautomizer-verify-qhAvR1uOyd/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f954b82-6d75-4485-8577-90f90db70d43/bin/uautomizer-verify-qhAvR1uOyd --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 69f7b2e4777088b02df05d348ae0a210dcd9618a97428b10acd3ef63d9199610 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-13 13:30:57,012 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-13 13:30:57,183 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f954b82-6d75-4485-8577-90f90db70d43/bin/uautomizer-verify-qhAvR1uOyd/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2024-11-13 13:30:57,194 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-13 13:30:57,194 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-13 13:30:57,225 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-13 13:30:57,225 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-13 13:30:57,226 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-13 13:30:57,226 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-13 13:30:57,226 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-13 13:30:57,227 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-13 13:30:57,227 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-13 13:30:57,227 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-13 13:30:57,228 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-13 13:30:57,228 INFO L153 SettingsManager]: * Use SBE=true [2024-11-13 13:30:57,228 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-13 13:30:57,228 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-13 13:30:57,228 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-13 13:30:57,229 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-13 13:30:57,229 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-13 13:30:57,229 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-13 13:30:57,229 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-13 13:30:57,229 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-13 13:30:57,229 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-13 13:30:57,230 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-11-13 13:30:57,230 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-13 13:30:57,230 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-11-13 13:30:57,230 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-13 13:30:57,230 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-13 13:30:57,231 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-13 13:30:57,231 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-13 13:30:57,231 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-13 13:30:57,231 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-13 13:30:57,231 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-13 13:30:57,232 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-13 13:30:57,232 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-13 13:30:57,232 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-13 13:30:57,232 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-13 13:30:57,232 INFO L153 SettingsManager]: * Trace refinement strategy=FOX [2024-11-13 13:30:57,233 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-11-13 13:30:57,233 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-13 13:30:57,233 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-13 13:30:57,233 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-13 13:30:57,233 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-13 13:30:57,234 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_5f954b82-6d75-4485-8577-90f90db70d43/bin/uautomizer-verify-qhAvR1uOyd 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 -> 69f7b2e4777088b02df05d348ae0a210dcd9618a97428b10acd3ef63d9199610 [2024-11-13 13:30:57,636 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-13 13:30:57,649 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-13 13:30:57,653 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-13 13:30:57,656 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-13 13:30:57,656 INFO L274 PluginConnector]: CDTParser initialized [2024-11-13 13:30:57,659 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f954b82-6d75-4485-8577-90f90db70d43/bin/uautomizer-verify-qhAvR1uOyd/../../sv-benchmarks/c/weaver/popl20-more-inc-subseq.wvr.c Unable to find full path for "g++" [2024-11-13 13:30:59,833 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-13 13:31:00,152 INFO L384 CDTParser]: Found 1 translation units. [2024-11-13 13:31:00,152 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f954b82-6d75-4485-8577-90f90db70d43/sv-benchmarks/c/weaver/popl20-more-inc-subseq.wvr.c [2024-11-13 13:31:00,169 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f954b82-6d75-4485-8577-90f90db70d43/bin/uautomizer-verify-qhAvR1uOyd/data/b7d9672d5/988f6ba22d6d4b7c9637dc9dfbb37806/FLAGacef99baf [2024-11-13 13:31:00,198 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f954b82-6d75-4485-8577-90f90db70d43/bin/uautomizer-verify-qhAvR1uOyd/data/b7d9672d5/988f6ba22d6d4b7c9637dc9dfbb37806 [2024-11-13 13:31:00,203 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-13 13:31:00,205 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-13 13:31:00,208 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-13 13:31:00,209 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-13 13:31:00,215 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-13 13:31:00,216 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 01:31:00" (1/1) ... [2024-11-13 13:31:00,217 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@775176d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:31:00, skipping insertion in model container [2024-11-13 13:31:00,220 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 01:31:00" (1/1) ... [2024-11-13 13:31:00,243 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-13 13:31:00,533 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_5f954b82-6d75-4485-8577-90f90db70d43/sv-benchmarks/c/weaver/popl20-more-inc-subseq.wvr.c[2950,2963] [2024-11-13 13:31:00,549 WARN L1072 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-13 13:31:00,556 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 13:31:00,579 INFO L200 MainTranslator]: Completed pre-run [2024-11-13 13:31:00,623 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_5f954b82-6d75-4485-8577-90f90db70d43/sv-benchmarks/c/weaver/popl20-more-inc-subseq.wvr.c[2950,2963] [2024-11-13 13:31:00,633 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 13:31:00,661 INFO L204 MainTranslator]: Completed translation [2024-11-13 13:31:00,662 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:31:00 WrapperNode [2024-11-13 13:31:00,663 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-13 13:31:00,665 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-13 13:31:00,665 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-13 13:31:00,666 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-13 13:31:00,675 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:31:00" (1/1) ... [2024-11-13 13:31:00,690 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:31:00" (1/1) ... [2024-11-13 13:31:00,731 INFO L138 Inliner]: procedures = 25, calls = 35, calls flagged for inlining = 11, calls inlined = 13, statements flattened = 178 [2024-11-13 13:31:00,735 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-13 13:31:00,736 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-13 13:31:00,736 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-13 13:31:00,736 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-13 13:31:00,748 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:31:00" (1/1) ... [2024-11-13 13:31:00,749 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:31:00" (1/1) ... [2024-11-13 13:31:00,757 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:31:00" (1/1) ... [2024-11-13 13:31:00,786 INFO L175 MemorySlicer]: Split 10 memory accesses to 2 slices as follows [2, 8]. 80 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2024-11-13 13:31:00,790 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:31:00" (1/1) ... [2024-11-13 13:31:00,790 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:31:00" (1/1) ... [2024-11-13 13:31:00,814 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:31:00" (1/1) ... [2024-11-13 13:31:00,822 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:31:00" (1/1) ... [2024-11-13 13:31:00,830 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:31:00" (1/1) ... [2024-11-13 13:31:00,831 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:31:00" (1/1) ... [2024-11-13 13:31:00,839 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-13 13:31:00,840 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-13 13:31:00,842 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-13 13:31:00,843 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-13 13:31:00,844 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:31:00" (1/1) ... [2024-11-13 13:31:00,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-13 13:31:00,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f954b82-6d75-4485-8577-90f90db70d43/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:31:00,891 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f954b82-6d75-4485-8577-90f90db70d43/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-13 13:31:00,894 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f954b82-6d75-4485-8577-90f90db70d43/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-13 13:31:00,928 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-13 13:31:00,928 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-13 13:31:00,928 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-13 13:31:00,929 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-13 13:31:00,929 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-13 13:31:00,929 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-11-13 13:31:00,929 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2024-11-13 13:31:00,929 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-13 13:31:00,930 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-13 13:31:00,930 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-13 13:31:00,930 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2024-11-13 13:31:00,930 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#1 [2024-11-13 13:31:00,930 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-13 13:31:00,930 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-13 13:31:00,930 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2024-11-13 13:31:00,931 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#1 [2024-11-13 13:31:00,933 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-13 13:31:01,103 INFO L238 CfgBuilder]: Building ICFG [2024-11-13 13:31:01,106 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-13 13:31:01,686 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-13 13:31:01,686 INFO L287 CfgBuilder]: Performing block encoding [2024-11-13 13:31:02,157 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-13 13:31:02,158 INFO L316 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-13 13:31:02,159 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 01:31:02 BoogieIcfgContainer [2024-11-13 13:31:02,159 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-13 13:31:02,198 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-13 13:31:02,198 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-13 13:31:02,208 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-13 13:31:02,208 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 01:31:00" (1/3) ... [2024-11-13 13:31:02,209 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2073b825 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 01:31:02, skipping insertion in model container [2024-11-13 13:31:02,210 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:31:00" (2/3) ... [2024-11-13 13:31:02,210 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2073b825 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 01:31:02, skipping insertion in model container [2024-11-13 13:31:02,210 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 01:31:02" (3/3) ... [2024-11-13 13:31:02,212 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-inc-subseq.wvr.c [2024-11-13 13:31:02,227 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-13 13:31:02,229 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-more-inc-subseq.wvr.c that has 3 procedures, 27 locations, 1 initial locations, 4 loop locations, and 1 error locations. [2024-11-13 13:31:02,229 INFO L492 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-13 13:31:02,306 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-13 13:31:02,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 33 places, 31 transitions, 76 flow [2024-11-13 13:31:02,410 INFO L124 PetriNetUnfolderBase]: 5/29 cut-off events. [2024-11-13 13:31:02,412 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-13 13:31:02,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38 conditions, 29 events. 5/29 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 42 event pairs, 0 based on Foata normal form. 0/23 useless extension candidates. Maximal degree in co-relation 20. Up to 2 conditions per place. [2024-11-13 13:31:02,423 INFO L82 GeneralOperation]: Start removeDead. Operand has 33 places, 31 transitions, 76 flow [2024-11-13 13:31:02,430 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 30 places, 28 transitions, 68 flow [2024-11-13 13:31:02,443 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-13 13:31:02,464 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;@5a1717b6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-13 13:31:02,464 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-11-13 13:31:02,486 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-13 13:31:02,486 INFO L124 PetriNetUnfolderBase]: 5/27 cut-off events. [2024-11-13 13:31:02,486 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-13 13:31:02,487 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:31:02,488 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:31:02,488 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 13:31:02,495 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:31:02,496 INFO L85 PathProgramCache]: Analyzing trace with hash -1326799871, now seen corresponding path program 1 times [2024-11-13 13:31:02,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 13:31:02,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1151442788] [2024-11-13 13:31:02,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:31:02,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:31:02,516 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f954b82-6d75-4485-8577-90f90db70d43/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:31:02,519 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f954b82-6d75-4485-8577-90f90db70d43/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:31:02,522 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f954b82-6d75-4485-8577-90f90db70d43/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-13 13:31:02,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:31:02,697 INFO L255 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-13 13:31:02,702 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:31:02,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:31:02,796 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 13:31:02,797 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 13:31:02,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151442788] [2024-11-13 13:31:02,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151442788] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 13:31:02,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 13:31:02,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-13 13:31:02,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145244410] [2024-11-13 13:31:02,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 13:31:02,813 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-13 13:31:02,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 13:31:02,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-13 13:31:02,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 13:31:02,854 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-11-13 13:31:02,857 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 28 transitions, 68 flow. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:31:02,857 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:31:02,857 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-11-13 13:31:02,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:31:03,140 INFO L124 PetriNetUnfolderBase]: 175/325 cut-off events. [2024-11-13 13:31:03,141 INFO L125 PetriNetUnfolderBase]: For 18/18 co-relation queries the response was YES. [2024-11-13 13:31:03,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 637 conditions, 325 events. 175/325 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1285 event pairs, 57 based on Foata normal form. 1/261 useless extension candidates. Maximal degree in co-relation 578. Up to 144 conditions per place. [2024-11-13 13:31:03,149 INFO L140 encePairwiseOnDemand]: 28/31 looper letters, 31 selfloop transitions, 2 changer transitions 2/41 dead transitions. [2024-11-13 13:31:03,151 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 41 transitions, 170 flow [2024-11-13 13:31:03,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-13 13:31:03,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-13 13:31:03,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 60 transitions. [2024-11-13 13:31:03,171 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6451612903225806 [2024-11-13 13:31:03,174 INFO L175 Difference]: Start difference. First operand has 30 places, 28 transitions, 68 flow. Second operand 3 states and 60 transitions. [2024-11-13 13:31:03,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 41 transitions, 170 flow [2024-11-13 13:31:03,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 41 transitions, 158 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-13 13:31:03,186 INFO L231 Difference]: Finished difference. Result has 29 places, 29 transitions, 72 flow [2024-11-13 13:31:03,189 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=72, PETRI_PLACES=29, PETRI_TRANSITIONS=29} [2024-11-13 13:31:03,194 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, -1 predicate places. [2024-11-13 13:31:03,194 INFO L471 AbstractCegarLoop]: Abstraction has has 29 places, 29 transitions, 72 flow [2024-11-13 13:31:03,194 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:31:03,194 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:31:03,195 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:31:03,223 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f954b82-6d75-4485-8577-90f90db70d43/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-13 13:31:03,395 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f954b82-6d75-4485-8577-90f90db70d43/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:31:03,396 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 13:31:03,396 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:31:03,396 INFO L85 PathProgramCache]: Analyzing trace with hash -1595084636, now seen corresponding path program 1 times [2024-11-13 13:31:03,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 13:31:03,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [805681772] [2024-11-13 13:31:03,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:31:03,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:31:03,397 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f954b82-6d75-4485-8577-90f90db70d43/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:31:03,400 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f954b82-6d75-4485-8577-90f90db70d43/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:31:03,401 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f954b82-6d75-4485-8577-90f90db70d43/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-13 13:31:03,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:31:03,544 INFO L255 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-13 13:31:03,545 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:31:03,691 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 13:31:03,693 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 13:31:03,693 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 13:31:03,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805681772] [2024-11-13 13:31:03,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805681772] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 13:31:03,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 13:31:03,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-13 13:31:03,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764849926] [2024-11-13 13:31:03,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 13:31:03,697 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 13:31:03,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 13:31:03,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 13:31:03,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-13 13:31:03,726 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-11-13 13:31:03,727 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 29 transitions, 72 flow. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:31:03,727 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:31:03,727 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-11-13 13:31:03,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:31:03,972 INFO L124 PetriNetUnfolderBase]: 257/451 cut-off events. [2024-11-13 13:31:03,972 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2024-11-13 13:31:03,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 961 conditions, 451 events. 257/451 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2012 event pairs, 77 based on Foata normal form. 0/385 useless extension candidates. Maximal degree in co-relation 447. Up to 248 conditions per place. [2024-11-13 13:31:03,978 INFO L140 encePairwiseOnDemand]: 26/31 looper letters, 32 selfloop transitions, 4 changer transitions 0/42 dead transitions. [2024-11-13 13:31:03,978 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 42 transitions, 176 flow [2024-11-13 13:31:03,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 13:31:03,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-13 13:31:03,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 75 transitions. [2024-11-13 13:31:03,981 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4838709677419355 [2024-11-13 13:31:03,982 INFO L175 Difference]: Start difference. First operand has 29 places, 29 transitions, 72 flow. Second operand 5 states and 75 transitions. [2024-11-13 13:31:03,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 42 transitions, 176 flow [2024-11-13 13:31:03,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 42 transitions, 173 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-13 13:31:03,986 INFO L231 Difference]: Finished difference. Result has 33 places, 30 transitions, 86 flow [2024-11-13 13:31:03,988 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=86, PETRI_PLACES=33, PETRI_TRANSITIONS=30} [2024-11-13 13:31:03,989 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 3 predicate places. [2024-11-13 13:31:03,989 INFO L471 AbstractCegarLoop]: Abstraction has has 33 places, 30 transitions, 86 flow [2024-11-13 13:31:03,989 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:31:03,990 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:31:03,990 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:31:04,016 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f954b82-6d75-4485-8577-90f90db70d43/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-13 13:31:04,191 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f954b82-6d75-4485-8577-90f90db70d43/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:31:04,191 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 13:31:04,192 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:31:04,192 INFO L85 PathProgramCache]: Analyzing trace with hash 1458680273, now seen corresponding path program 1 times [2024-11-13 13:31:04,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 13:31:04,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [266567696] [2024-11-13 13:31:04,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:31:04,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:31:04,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f954b82-6d75-4485-8577-90f90db70d43/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:31:04,196 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f954b82-6d75-4485-8577-90f90db70d43/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:31:04,197 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f954b82-6d75-4485-8577-90f90db70d43/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-13 13:31:04,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:31:04,317 INFO L255 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-13 13:31:04,318 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:31:04,400 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:31:04,400 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 13:31:04,464 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:31:04,464 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 13:31:04,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266567696] [2024-11-13 13:31:04,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266567696] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 13:31:04,464 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 13:31:04,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2024-11-13 13:31:04,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033446830] [2024-11-13 13:31:04,465 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 13:31:04,465 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 13:31:04,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 13:31:04,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 13:31:04,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-13 13:31:04,480 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-11-13 13:31:04,480 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 30 transitions, 86 flow. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:31:04,480 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:31:04,480 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-11-13 13:31:04,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:31:05,024 INFO L124 PetriNetUnfolderBase]: 654/1063 cut-off events. [2024-11-13 13:31:05,024 INFO L125 PetriNetUnfolderBase]: For 87/87 co-relation queries the response was YES. [2024-11-13 13:31:05,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2376 conditions, 1063 events. 654/1063 cut-off events. For 87/87 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 4569 event pairs, 38 based on Foata normal form. 0/943 useless extension candidates. Maximal degree in co-relation 1155. Up to 326 conditions per place. [2024-11-13 13:31:05,034 INFO L140 encePairwiseOnDemand]: 25/31 looper letters, 54 selfloop transitions, 15 changer transitions 0/72 dead transitions. [2024-11-13 13:31:05,034 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 72 transitions, 337 flow [2024-11-13 13:31:05,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-13 13:31:05,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-13 13:31:05,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 99 transitions. [2024-11-13 13:31:05,036 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45622119815668205 [2024-11-13 13:31:05,037 INFO L175 Difference]: Start difference. First operand has 33 places, 30 transitions, 86 flow. Second operand 7 states and 99 transitions. [2024-11-13 13:31:05,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 72 transitions, 337 flow [2024-11-13 13:31:05,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 72 transitions, 329 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-13 13:31:05,040 INFO L231 Difference]: Finished difference. Result has 40 places, 42 transitions, 174 flow [2024-11-13 13:31:05,041 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=174, PETRI_PLACES=40, PETRI_TRANSITIONS=42} [2024-11-13 13:31:05,042 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 10 predicate places. [2024-11-13 13:31:05,042 INFO L471 AbstractCegarLoop]: Abstraction has has 40 places, 42 transitions, 174 flow [2024-11-13 13:31:05,042 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:31:05,043 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:31:05,043 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:31:05,068 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f954b82-6d75-4485-8577-90f90db70d43/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-13 13:31:05,243 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f954b82-6d75-4485-8577-90f90db70d43/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:31:05,244 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 13:31:05,244 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:31:05,245 INFO L85 PathProgramCache]: Analyzing trace with hash -167669369, now seen corresponding path program 2 times [2024-11-13 13:31:05,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 13:31:05,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1844679513] [2024-11-13 13:31:05,245 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 13:31:05,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:31:05,245 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f954b82-6d75-4485-8577-90f90db70d43/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:31:05,247 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f954b82-6d75-4485-8577-90f90db70d43/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:31:05,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f954b82-6d75-4485-8577-90f90db70d43/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-13 13:31:05,358 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-13 13:31:05,359 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 13:31:05,361 INFO L255 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-13 13:31:05,363 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:31:05,411 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-13 13:31:05,411 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 13:31:05,411 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 13:31:05,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844679513] [2024-11-13 13:31:05,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844679513] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 13:31:05,412 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 13:31:05,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-13 13:31:05,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321378919] [2024-11-13 13:31:05,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 13:31:05,413 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-13 13:31:05,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 13:31:05,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-13 13:31:05,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 13:31:05,425 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-11-13 13:31:05,425 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 42 transitions, 174 flow. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:31:05,425 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:31:05,425 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-11-13 13:31:05,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:31:05,693 INFO L124 PetriNetUnfolderBase]: 468/811 cut-off events. [2024-11-13 13:31:05,694 INFO L125 PetriNetUnfolderBase]: For 630/662 co-relation queries the response was YES. [2024-11-13 13:31:05,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2149 conditions, 811 events. 468/811 cut-off events. For 630/662 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 3748 event pairs, 277 based on Foata normal form. 2/724 useless extension candidates. Maximal degree in co-relation 1491. Up to 724 conditions per place. [2024-11-13 13:31:05,703 INFO L140 encePairwiseOnDemand]: 28/31 looper letters, 29 selfloop transitions, 2 changer transitions 0/43 dead transitions. [2024-11-13 13:31:05,703 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 43 transitions, 238 flow [2024-11-13 13:31:05,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-13 13:31:05,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-13 13:31:05,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 48 transitions. [2024-11-13 13:31:05,705 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5161290322580645 [2024-11-13 13:31:05,705 INFO L175 Difference]: Start difference. First operand has 40 places, 42 transitions, 174 flow. Second operand 3 states and 48 transitions. [2024-11-13 13:31:05,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 43 transitions, 238 flow [2024-11-13 13:31:05,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 43 transitions, 238 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-13 13:31:05,712 INFO L231 Difference]: Finished difference. Result has 43 places, 43 transitions, 186 flow [2024-11-13 13:31:05,712 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=186, PETRI_PLACES=43, PETRI_TRANSITIONS=43} [2024-11-13 13:31:05,713 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 13 predicate places. [2024-11-13 13:31:05,714 INFO L471 AbstractCegarLoop]: Abstraction has has 43 places, 43 transitions, 186 flow [2024-11-13 13:31:05,714 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:31:05,714 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:31:05,714 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:31:05,740 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f954b82-6d75-4485-8577-90f90db70d43/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-13 13:31:05,918 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f954b82-6d75-4485-8577-90f90db70d43/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:31:05,919 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 13:31:05,920 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:31:05,920 INFO L85 PathProgramCache]: Analyzing trace with hash 609907934, now seen corresponding path program 1 times [2024-11-13 13:31:05,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 13:31:05,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1656748545] [2024-11-13 13:31:05,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:31:05,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:31:05,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f954b82-6d75-4485-8577-90f90db70d43/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:31:05,924 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f954b82-6d75-4485-8577-90f90db70d43/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:31:05,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f954b82-6d75-4485-8577-90f90db70d43/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-13 13:31:06,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:31:06,054 INFO L255 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-13 13:31:06,056 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:31:06,220 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 13:31:06,221 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 13:31:06,221 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 13:31:06,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656748545] [2024-11-13 13:31:06,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656748545] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 13:31:06,222 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 13:31:06,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-13 13:31:06,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994305173] [2024-11-13 13:31:06,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 13:31:06,224 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 13:31:06,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 13:31:06,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 13:31:06,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 13:31:06,229 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-11-13 13:31:06,229 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 43 transitions, 186 flow. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 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) [2024-11-13 13:31:06,229 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:31:06,230 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-11-13 13:31:06,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:31:06,612 INFO L124 PetriNetUnfolderBase]: 549/991 cut-off events. [2024-11-13 13:31:06,613 INFO L125 PetriNetUnfolderBase]: For 854/907 co-relation queries the response was YES. [2024-11-13 13:31:06,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2697 conditions, 991 events. 549/991 cut-off events. For 854/907 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 4897 event pairs, 337 based on Foata normal form. 42/924 useless extension candidates. Maximal degree in co-relation 2134. Up to 725 conditions per place. [2024-11-13 13:31:06,625 INFO L140 encePairwiseOnDemand]: 26/31 looper letters, 30 selfloop transitions, 2 changer transitions 23/67 dead transitions. [2024-11-13 13:31:06,626 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 67 transitions, 408 flow [2024-11-13 13:31:06,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 13:31:06,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-13 13:31:06,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 72 transitions. [2024-11-13 13:31:06,628 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5806451612903226 [2024-11-13 13:31:06,629 INFO L175 Difference]: Start difference. First operand has 43 places, 43 transitions, 186 flow. Second operand 4 states and 72 transitions. [2024-11-13 13:31:06,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 67 transitions, 408 flow [2024-11-13 13:31:06,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 67 transitions, 400 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-11-13 13:31:06,643 INFO L231 Difference]: Finished difference. Result has 47 places, 44 transitions, 198 flow [2024-11-13 13:31:06,643 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=198, PETRI_PLACES=47, PETRI_TRANSITIONS=44} [2024-11-13 13:31:06,645 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 17 predicate places. [2024-11-13 13:31:06,646 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 44 transitions, 198 flow [2024-11-13 13:31:06,647 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 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) [2024-11-13 13:31:06,647 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:31:06,647 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:31:06,676 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f954b82-6d75-4485-8577-90f90db70d43/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-13 13:31:06,847 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f954b82-6d75-4485-8577-90f90db70d43/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:31:06,848 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 13:31:06,849 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:31:06,849 INFO L85 PathProgramCache]: Analyzing trace with hash -920359378, now seen corresponding path program 1 times [2024-11-13 13:31:06,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 13:31:06,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1535620811] [2024-11-13 13:31:06,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:31:06,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:31:06,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f954b82-6d75-4485-8577-90f90db70d43/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:31:06,853 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f954b82-6d75-4485-8577-90f90db70d43/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:31:06,856 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f954b82-6d75-4485-8577-90f90db70d43/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-13 13:31:06,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:31:06,987 INFO L255 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-13 13:31:06,989 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:31:07,294 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 13:31:07,294 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 13:31:07,672 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 13:31:07,673 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 13:31:07,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535620811] [2024-11-13 13:31:07,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535620811] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 13:31:07,673 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 13:31:07,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2024-11-13 13:31:07,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411288050] [2024-11-13 13:31:07,674 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 13:31:07,674 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-13 13:31:07,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 13:31:07,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-13 13:31:07,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-11-13 13:31:07,749 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-11-13 13:31:07,749 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 44 transitions, 198 flow. Second operand has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:31:07,749 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:31:07,749 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-11-13 13:31:07,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:31:08,213 INFO L124 PetriNetUnfolderBase]: 536/990 cut-off events. [2024-11-13 13:31:08,213 INFO L125 PetriNetUnfolderBase]: For 1027/1110 co-relation queries the response was YES. [2024-11-13 13:31:08,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2892 conditions, 990 events. 536/990 cut-off events. For 1027/1110 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 4807 event pairs, 199 based on Foata normal form. 48/952 useless extension candidates. Maximal degree in co-relation 2872. Up to 567 conditions per place. [2024-11-13 13:31:08,222 INFO L140 encePairwiseOnDemand]: 26/31 looper letters, 62 selfloop transitions, 6 changer transitions 8/88 dead transitions. [2024-11-13 13:31:08,223 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 88 transitions, 557 flow [2024-11-13 13:31:08,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-13 13:31:08,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-13 13:31:08,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 102 transitions. [2024-11-13 13:31:08,227 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5483870967741935 [2024-11-13 13:31:08,227 INFO L175 Difference]: Start difference. First operand has 47 places, 44 transitions, 198 flow. Second operand 6 states and 102 transitions. [2024-11-13 13:31:08,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 88 transitions, 557 flow [2024-11-13 13:31:08,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 88 transitions, 553 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-13 13:31:08,238 INFO L231 Difference]: Finished difference. Result has 53 places, 48 transitions, 241 flow [2024-11-13 13:31:08,239 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=241, PETRI_PLACES=53, PETRI_TRANSITIONS=48} [2024-11-13 13:31:08,241 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 23 predicate places. [2024-11-13 13:31:08,241 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 48 transitions, 241 flow [2024-11-13 13:31:08,241 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:31:08,241 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:31:08,242 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:31:08,267 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f954b82-6d75-4485-8577-90f90db70d43/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-13 13:31:08,445 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f954b82-6d75-4485-8577-90f90db70d43/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:31:08,446 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 13:31:08,446 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:31:08,447 INFO L85 PathProgramCache]: Analyzing trace with hash -1209537795, now seen corresponding path program 1 times [2024-11-13 13:31:08,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 13:31:08,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [308624054] [2024-11-13 13:31:08,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:31:08,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:31:08,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f954b82-6d75-4485-8577-90f90db70d43/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:31:08,450 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f954b82-6d75-4485-8577-90f90db70d43/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:31:08,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f954b82-6d75-4485-8577-90f90db70d43/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-13 13:31:08,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:31:08,589 INFO L255 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-13 13:31:08,593 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:31:09,790 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 13:31:09,792 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 13:31:09,818 INFO L349 Elim1Store]: treesize reduction 17, result has 15.0 percent of original size [2024-11-13 13:31:09,819 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 13 [2024-11-13 13:31:09,928 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 13:31:09,928 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 13:31:12,199 INFO L349 Elim1Store]: treesize reduction 23, result has 74.7 percent of original size [2024-11-13 13:31:12,199 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 75 [2024-11-13 13:31:12,603 INFO L349 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2024-11-13 13:31:12,604 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2024-11-13 13:31:13,396 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 13:31:13,398 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 13:31:13,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308624054] [2024-11-13 13:31:13,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308624054] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 13:31:13,399 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 13:31:13,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2024-11-13 13:31:13,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267783370] [2024-11-13 13:31:13,399 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 13:31:13,400 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-13 13:31:13,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 13:31:13,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-13 13:31:13,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2024-11-13 13:31:13,871 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-11-13 13:31:13,872 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 48 transitions, 241 flow. Second operand has 19 states, 19 states have (on average 7.526315789473684) internal successors, (143), 19 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:31:13,872 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:31:13,872 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-11-13 13:31:13,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:31:20,352 INFO L124 PetriNetUnfolderBase]: 1680/2829 cut-off events. [2024-11-13 13:31:20,353 INFO L125 PetriNetUnfolderBase]: For 3342/3342 co-relation queries the response was YES. [2024-11-13 13:31:20,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9085 conditions, 2829 events. 1680/2829 cut-off events. For 3342/3342 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 14770 event pairs, 317 based on Foata normal form. 2/2663 useless extension candidates. Maximal degree in co-relation 6023. Up to 752 conditions per place. [2024-11-13 13:31:20,370 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 81 selfloop transitions, 12 changer transitions 182/278 dead transitions. [2024-11-13 13:31:20,370 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 278 transitions, 1905 flow [2024-11-13 13:31:20,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-13 13:31:20,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-11-13 13:31:20,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 310 transitions. [2024-11-13 13:31:20,374 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.43478260869565216 [2024-11-13 13:31:20,374 INFO L175 Difference]: Start difference. First operand has 53 places, 48 transitions, 241 flow. Second operand 23 states and 310 transitions. [2024-11-13 13:31:20,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 278 transitions, 1905 flow [2024-11-13 13:31:20,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 278 transitions, 1885 flow, removed 9 selfloop flow, removed 1 redundant places. [2024-11-13 13:31:20,396 INFO L231 Difference]: Finished difference. Result has 90 places, 53 transitions, 391 flow [2024-11-13 13:31:20,397 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=229, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=391, PETRI_PLACES=90, PETRI_TRANSITIONS=53} [2024-11-13 13:31:20,398 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 60 predicate places. [2024-11-13 13:31:20,398 INFO L471 AbstractCegarLoop]: Abstraction has has 90 places, 53 transitions, 391 flow [2024-11-13 13:31:20,398 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 7.526315789473684) internal successors, (143), 19 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:31:20,399 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:31:20,399 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:31:20,422 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f954b82-6d75-4485-8577-90f90db70d43/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-13 13:31:20,599 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f954b82-6d75-4485-8577-90f90db70d43/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:31:20,600 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 13:31:20,600 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:31:20,600 INFO L85 PathProgramCache]: Analyzing trace with hash 212313275, now seen corresponding path program 2 times [2024-11-13 13:31:20,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 13:31:20,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [438513815] [2024-11-13 13:31:20,600 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 13:31:20,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:31:20,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f954b82-6d75-4485-8577-90f90db70d43/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:31:20,602 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f954b82-6d75-4485-8577-90f90db70d43/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:31:20,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f954b82-6d75-4485-8577-90f90db70d43/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-13 13:31:20,751 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 13:31:20,751 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 13:31:20,755 INFO L255 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-13 13:31:20,758 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:31:22,241 INFO L349 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2024-11-13 13:31:22,242 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 10 [2024-11-13 13:31:22,470 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 13:31:22,470 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 13:31:24,396 INFO L349 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2024-11-13 13:31:24,396 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2024-11-13 13:31:24,691 INFO L349 Elim1Store]: treesize reduction 70, result has 23.1 percent of original size [2024-11-13 13:31:24,691 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 28 [2024-11-13 13:31:25,507 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 13:31:25,507 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 13:31:25,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438513815] [2024-11-13 13:31:25,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [438513815] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 13:31:25,508 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 13:31:25,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 24 [2024-11-13 13:31:25,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938114409] [2024-11-13 13:31:25,508 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 13:31:25,508 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-13 13:31:25,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 13:31:25,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-13 13:31:25,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=437, Unknown=0, NotChecked=0, Total=600 [2024-11-13 13:31:25,674 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-11-13 13:31:25,675 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 53 transitions, 391 flow. Second operand has 25 states, 25 states have (on average 7.0) internal successors, (175), 25 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:31:25,675 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:31:25,675 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-11-13 13:31:25,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:31:37,210 INFO L124 PetriNetUnfolderBase]: 2042/3493 cut-off events. [2024-11-13 13:31:37,210 INFO L125 PetriNetUnfolderBase]: For 22451/22451 co-relation queries the response was YES. [2024-11-13 13:31:37,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15216 conditions, 3493 events. 2042/3493 cut-off events. For 22451/22451 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 18724 event pairs, 94 based on Foata normal form. 34/3311 useless extension candidates. Maximal degree in co-relation 12611. Up to 617 conditions per place. [2024-11-13 13:31:37,246 INFO L140 encePairwiseOnDemand]: 16/31 looper letters, 235 selfloop transitions, 159 changer transitions 57/454 dead transitions. [2024-11-13 13:31:37,247 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 454 transitions, 4122 flow [2024-11-13 13:31:37,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2024-11-13 13:31:37,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2024-11-13 13:31:37,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 560 transitions. [2024-11-13 13:31:37,251 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.39270687237026647 [2024-11-13 13:31:37,252 INFO L175 Difference]: Start difference. First operand has 90 places, 53 transitions, 391 flow. Second operand 46 states and 560 transitions. [2024-11-13 13:31:37,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 454 transitions, 4122 flow [2024-11-13 13:31:37,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 454 transitions, 3465 flow, removed 323 selfloop flow, removed 13 redundant places. [2024-11-13 13:31:37,319 INFO L231 Difference]: Finished difference. Result has 119 places, 232 transitions, 2333 flow [2024-11-13 13:31:37,320 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=316, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=2333, PETRI_PLACES=119, PETRI_TRANSITIONS=232} [2024-11-13 13:31:37,324 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 89 predicate places. [2024-11-13 13:31:37,324 INFO L471 AbstractCegarLoop]: Abstraction has has 119 places, 232 transitions, 2333 flow [2024-11-13 13:31:37,325 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 7.0) internal successors, (175), 25 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:31:37,325 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:31:37,325 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:31:37,347 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f954b82-6d75-4485-8577-90f90db70d43/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-13 13:31:37,526 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f954b82-6d75-4485-8577-90f90db70d43/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:31:37,526 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 13:31:37,527 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:31:37,527 INFO L85 PathProgramCache]: Analyzing trace with hash -2146331319, now seen corresponding path program 3 times [2024-11-13 13:31:37,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 13:31:37,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1047456085] [2024-11-13 13:31:37,527 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 13:31:37,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:31:37,527 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f954b82-6d75-4485-8577-90f90db70d43/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:31:37,529 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f954b82-6d75-4485-8577-90f90db70d43/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:31:37,530 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f954b82-6d75-4485-8577-90f90db70d43/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process