./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/test-easy1.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4fc63b2a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd2b490c-19fa-4c2a-b5b1-25b4891806e2/bin/uautomizer-verify-4GaUIPS5ZU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd2b490c-19fa-4c2a-b5b1-25b4891806e2/bin/uautomizer-verify-4GaUIPS5ZU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd2b490c-19fa-4c2a-b5b1-25b4891806e2/bin/uautomizer-verify-4GaUIPS5ZU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd2b490c-19fa-4c2a-b5b1-25b4891806e2/bin/uautomizer-verify-4GaUIPS5ZU/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/test-easy1.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd2b490c-19fa-4c2a-b5b1-25b4891806e2/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd2b490c-19fa-4c2a-b5b1-25b4891806e2/bin/uautomizer-verify-4GaUIPS5ZU --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 935a7b7fee114f90b65d69dd73b2635844dd9aedca06c4cbc37a4ce046611c9d --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-10-31 22:16:23,687 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-31 22:16:23,798 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd2b490c-19fa-4c2a-b5b1-25b4891806e2/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-31 22:16:23,806 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-31 22:16:23,807 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-31 22:16:23,833 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-31 22:16:23,834 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-31 22:16:23,834 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-31 22:16:23,835 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-31 22:16:23,835 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-31 22:16:23,836 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-31 22:16:23,836 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-31 22:16:23,837 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-31 22:16:23,837 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-31 22:16:23,837 INFO L153 SettingsManager]: * Use SBE=true [2024-10-31 22:16:23,842 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-31 22:16:23,845 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-31 22:16:23,846 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-31 22:16:23,846 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-31 22:16:23,846 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-31 22:16:23,847 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-31 22:16:23,851 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-31 22:16:23,851 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-31 22:16:23,851 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-31 22:16:23,852 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-31 22:16:23,852 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-31 22:16:23,852 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-31 22:16:23,852 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-31 22:16:23,853 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-31 22:16:23,853 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-31 22:16:23,853 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-31 22:16:23,854 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-31 22:16:23,854 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 22:16:23,854 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-31 22:16:23,857 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-31 22:16:23,858 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-31 22:16:23,859 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-31 22:16:23,859 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-31 22:16:23,860 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-31 22:16:23,860 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-31 22:16:23,860 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-31 22:16:23,861 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-31 22:16:23,861 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd2b490c-19fa-4c2a-b5b1-25b4891806e2/bin/uautomizer-verify-4GaUIPS5ZU/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd2b490c-19fa-4c2a-b5b1-25b4891806e2/bin/uautomizer-verify-4GaUIPS5ZU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 935a7b7fee114f90b65d69dd73b2635844dd9aedca06c4cbc37a4ce046611c9d [2024-10-31 22:16:24,194 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-31 22:16:24,225 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-31 22:16:24,227 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-31 22:16:24,229 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-31 22:16:24,229 INFO L274 PluginConnector]: CDTParser initialized [2024-10-31 22:16:24,231 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd2b490c-19fa-4c2a-b5b1-25b4891806e2/bin/uautomizer-verify-4GaUIPS5ZU/../../sv-benchmarks/c/weaver/test-easy1.wvr.c Unable to find full path for "g++" [2024-10-31 22:16:26,244 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-31 22:16:26,448 INFO L384 CDTParser]: Found 1 translation units. [2024-10-31 22:16:26,449 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd2b490c-19fa-4c2a-b5b1-25b4891806e2/sv-benchmarks/c/weaver/test-easy1.wvr.c [2024-10-31 22:16:26,457 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd2b490c-19fa-4c2a-b5b1-25b4891806e2/bin/uautomizer-verify-4GaUIPS5ZU/data/b6e699fb7/9a7fd93cb1b14dd1a6be3e55abc0ce00/FLAGc8a4a4208 [2024-10-31 22:16:26,821 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd2b490c-19fa-4c2a-b5b1-25b4891806e2/bin/uautomizer-verify-4GaUIPS5ZU/data/b6e699fb7/9a7fd93cb1b14dd1a6be3e55abc0ce00 [2024-10-31 22:16:26,824 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-31 22:16:26,826 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-31 22:16:26,827 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-31 22:16:26,827 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-31 22:16:26,834 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-31 22:16:26,834 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 10:16:26" (1/1) ... [2024-10-31 22:16:26,835 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65e1072b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:16:26, skipping insertion in model container [2024-10-31 22:16:26,838 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 10:16:26" (1/1) ... [2024-10-31 22:16:26,861 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-31 22:16:27,097 WARN L251 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_dd2b490c-19fa-4c2a-b5b1-25b4891806e2/sv-benchmarks/c/weaver/test-easy1.wvr.c[1902,1915] [2024-10-31 22:16:27,102 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 22:16:27,110 INFO L200 MainTranslator]: Completed pre-run [2024-10-31 22:16:27,125 WARN L251 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_dd2b490c-19fa-4c2a-b5b1-25b4891806e2/sv-benchmarks/c/weaver/test-easy1.wvr.c[1902,1915] [2024-10-31 22:16:27,126 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 22:16:27,141 INFO L204 MainTranslator]: Completed translation [2024-10-31 22:16:27,142 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:16:27 WrapperNode [2024-10-31 22:16:27,142 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-31 22:16:27,143 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-31 22:16:27,143 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-31 22:16:27,143 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-31 22:16:27,150 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:16:27" (1/1) ... [2024-10-31 22:16:27,156 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:16:27" (1/1) ... [2024-10-31 22:16:27,171 INFO L138 Inliner]: procedures = 20, calls = 10, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 45 [2024-10-31 22:16:27,172 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-31 22:16:27,173 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-31 22:16:27,173 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-31 22:16:27,173 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-31 22:16:27,185 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:16:27" (1/1) ... [2024-10-31 22:16:27,185 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:16:27" (1/1) ... [2024-10-31 22:16:27,187 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:16:27" (1/1) ... [2024-10-31 22:16:27,200 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-10-31 22:16:27,200 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:16:27" (1/1) ... [2024-10-31 22:16:27,201 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:16:27" (1/1) ... [2024-10-31 22:16:27,204 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:16:27" (1/1) ... [2024-10-31 22:16:27,208 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:16:27" (1/1) ... [2024-10-31 22:16:27,209 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:16:27" (1/1) ... [2024-10-31 22:16:27,210 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:16:27" (1/1) ... [2024-10-31 22:16:27,212 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-31 22:16:27,213 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-31 22:16:27,213 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-31 22:16:27,214 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-31 22:16:27,215 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:16:27" (1/1) ... [2024-10-31 22:16:27,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 22:16:27,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd2b490c-19fa-4c2a-b5b1-25b4891806e2/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:16:27,255 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd2b490c-19fa-4c2a-b5b1-25b4891806e2/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-31 22:16:27,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd2b490c-19fa-4c2a-b5b1-25b4891806e2/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-31 22:16:27,309 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-31 22:16:27,309 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-10-31 22:16:27,309 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-10-31 22:16:27,309 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-10-31 22:16:27,309 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-10-31 22:16:27,309 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-31 22:16:27,309 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-31 22:16:27,310 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-31 22:16:27,311 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-31 22:16:27,461 INFO L238 CfgBuilder]: Building ICFG [2024-10-31 22:16:27,463 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-31 22:16:27,611 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-31 22:16:27,611 INFO L287 CfgBuilder]: Performing block encoding [2024-10-31 22:16:27,770 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-31 22:16:27,770 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-10-31 22:16:27,770 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 10:16:27 BoogieIcfgContainer [2024-10-31 22:16:27,771 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-31 22:16:27,773 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-31 22:16:27,773 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-31 22:16:27,776 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-31 22:16:27,777 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.10 10:16:26" (1/3) ... [2024-10-31 22:16:27,777 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e63fea7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 10:16:27, skipping insertion in model container [2024-10-31 22:16:27,778 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:16:27" (2/3) ... [2024-10-31 22:16:27,778 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e63fea7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 10:16:27, skipping insertion in model container [2024-10-31 22:16:27,778 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 10:16:27" (3/3) ... [2024-10-31 22:16:27,779 INFO L112 eAbstractionObserver]: Analyzing ICFG test-easy1.wvr.c [2024-10-31 22:16:27,796 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-31 22:16:27,796 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-31 22:16:27,796 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-31 22:16:27,836 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-10-31 22:16:27,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 23 places, 18 transitions, 50 flow [2024-10-31 22:16:27,906 INFO L124 PetriNetUnfolderBase]: 2/16 cut-off events. [2024-10-31 22:16:27,906 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-31 22:16:27,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25 conditions, 16 events. 2/16 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 9 event pairs, 0 based on Foata normal form. 0/13 useless extension candidates. Maximal degree in co-relation 11. Up to 2 conditions per place. [2024-10-31 22:16:27,909 INFO L82 GeneralOperation]: Start removeDead. Operand has 23 places, 18 transitions, 50 flow [2024-10-31 22:16:27,913 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 20 places, 15 transitions, 42 flow [2024-10-31 22:16:27,927 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-31 22:16:27,941 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;@2420fed2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-31 22:16:27,941 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-10-31 22:16:27,957 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-31 22:16:27,962 INFO L124 PetriNetUnfolderBase]: 2/14 cut-off events. [2024-10-31 22:16:27,962 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-31 22:16:27,962 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:16:27,963 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:16:27,964 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-31 22:16:27,972 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:16:27,976 INFO L85 PathProgramCache]: Analyzing trace with hash 1354130280, now seen corresponding path program 1 times [2024-10-31 22:16:27,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:16:27,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223317589] [2024-10-31 22:16:27,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:16:27,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:16:28,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:16:28,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:16:28,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:16:28,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223317589] [2024-10-31 22:16:28,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223317589] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:16:28,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:16:28,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-31 22:16:28,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133098347] [2024-10-31 22:16:28,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:16:28,331 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 22:16:28,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:16:28,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 22:16:28,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 22:16:28,372 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 18 [2024-10-31 22:16:28,375 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 15 transitions, 42 flow. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 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) [2024-10-31 22:16:28,375 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:16:28,376 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 18 [2024-10-31 22:16:28,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:16:28,484 INFO L124 PetriNetUnfolderBase]: 59/104 cut-off events. [2024-10-31 22:16:28,484 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2024-10-31 22:16:28,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 225 conditions, 104 events. 59/104 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 273 event pairs, 8 based on Foata normal form. 1/70 useless extension candidates. Maximal degree in co-relation 179. Up to 77 conditions per place. [2024-10-31 22:16:28,488 INFO L140 encePairwiseOnDemand]: 14/18 looper letters, 17 selfloop transitions, 3 changer transitions 1/24 dead transitions. [2024-10-31 22:16:28,488 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 24 transitions, 111 flow [2024-10-31 22:16:28,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 22:16:28,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-31 22:16:28,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 37 transitions. [2024-10-31 22:16:28,501 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6851851851851852 [2024-10-31 22:16:28,503 INFO L175 Difference]: Start difference. First operand has 20 places, 15 transitions, 42 flow. Second operand 3 states and 37 transitions. [2024-10-31 22:16:28,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 24 transitions, 111 flow [2024-10-31 22:16:28,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 24 transitions, 97 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-31 22:16:28,513 INFO L231 Difference]: Finished difference. Result has 19 places, 17 transitions, 53 flow [2024-10-31 22:16:28,515 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=53, PETRI_PLACES=19, PETRI_TRANSITIONS=17} [2024-10-31 22:16:28,519 INFO L277 CegarLoopForPetriNet]: 20 programPoint places, -1 predicate places. [2024-10-31 22:16:28,520 INFO L471 AbstractCegarLoop]: Abstraction has has 19 places, 17 transitions, 53 flow [2024-10-31 22:16:28,520 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 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) [2024-10-31 22:16:28,520 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:16:28,520 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:16:28,520 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-31 22:16:28,521 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-31 22:16:28,521 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:16:28,521 INFO L85 PathProgramCache]: Analyzing trace with hash 1417842389, now seen corresponding path program 1 times [2024-10-31 22:16:28,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:16:28,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463038921] [2024-10-31 22:16:28,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:16:28,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:16:28,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:16:28,724 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:16:28,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:16:28,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463038921] [2024-10-31 22:16:28,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463038921] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:16:28,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:16:28,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-31 22:16:28,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320552306] [2024-10-31 22:16:28,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:16:28,727 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 22:16:28,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:16:28,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 22:16:28,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:16:28,729 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 18 [2024-10-31 22:16:28,729 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 17 transitions, 53 flow. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 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) [2024-10-31 22:16:28,729 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:16:28,730 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 18 [2024-10-31 22:16:28,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:16:28,899 INFO L124 PetriNetUnfolderBase]: 62/118 cut-off events. [2024-10-31 22:16:28,900 INFO L125 PetriNetUnfolderBase]: For 32/32 co-relation queries the response was YES. [2024-10-31 22:16:28,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 288 conditions, 118 events. 62/118 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 337 event pairs, 6 based on Foata normal form. 4/122 useless extension candidates. Maximal degree in co-relation 112. Up to 56 conditions per place. [2024-10-31 22:16:28,904 INFO L140 encePairwiseOnDemand]: 13/18 looper letters, 25 selfloop transitions, 7 changer transitions 0/35 dead transitions. [2024-10-31 22:16:28,904 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 35 transitions, 169 flow [2024-10-31 22:16:28,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 22:16:28,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-31 22:16:28,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 55 transitions. [2024-10-31 22:16:28,906 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6111111111111112 [2024-10-31 22:16:28,906 INFO L175 Difference]: Start difference. First operand has 19 places, 17 transitions, 53 flow. Second operand 5 states and 55 transitions. [2024-10-31 22:16:28,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 35 transitions, 169 flow [2024-10-31 22:16:28,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 35 transitions, 165 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-31 22:16:28,909 INFO L231 Difference]: Finished difference. Result has 25 places, 23 transitions, 106 flow [2024-10-31 22:16:28,909 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=106, PETRI_PLACES=25, PETRI_TRANSITIONS=23} [2024-10-31 22:16:28,910 INFO L277 CegarLoopForPetriNet]: 20 programPoint places, 5 predicate places. [2024-10-31 22:16:28,912 INFO L471 AbstractCegarLoop]: Abstraction has has 25 places, 23 transitions, 106 flow [2024-10-31 22:16:28,912 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 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) [2024-10-31 22:16:28,913 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:16:28,913 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:16:28,913 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-31 22:16:28,913 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-31 22:16:28,914 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:16:28,914 INFO L85 PathProgramCache]: Analyzing trace with hash -1979750107, now seen corresponding path program 2 times [2024-10-31 22:16:28,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:16:28,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319721116] [2024-10-31 22:16:28,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:16:28,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:16:28,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:16:29,018 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:16:29,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:16:29,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319721116] [2024-10-31 22:16:29,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319721116] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:16:29,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388739923] [2024-10-31 22:16:29,019 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-31 22:16:29,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:16:29,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd2b490c-19fa-4c2a-b5b1-25b4891806e2/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:16:29,022 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd2b490c-19fa-4c2a-b5b1-25b4891806e2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:16:29,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd2b490c-19fa-4c2a-b5b1-25b4891806e2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-31 22:16:29,101 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-31 22:16:29,101 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:16:29,103 INFO L255 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-31 22:16:29,107 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:16:29,212 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:16:29,213 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:16:29,291 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:16:29,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388739923] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-31 22:16:29,293 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-10-31 22:16:29,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 6 [2024-10-31 22:16:29,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299851703] [2024-10-31 22:16:29,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:16:29,295 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 22:16:29,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:16:29,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 22:16:29,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-10-31 22:16:29,298 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 18 [2024-10-31 22:16:29,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 23 transitions, 106 flow. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 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) [2024-10-31 22:16:29,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:16:29,299 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 18 [2024-10-31 22:16:29,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:16:29,406 INFO L124 PetriNetUnfolderBase]: 56/110 cut-off events. [2024-10-31 22:16:29,406 INFO L125 PetriNetUnfolderBase]: For 118/118 co-relation queries the response was YES. [2024-10-31 22:16:29,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 363 conditions, 110 events. 56/110 cut-off events. For 118/118 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 311 event pairs, 8 based on Foata normal form. 5/115 useless extension candidates. Maximal degree in co-relation 244. Up to 46 conditions per place. [2024-10-31 22:16:29,411 INFO L140 encePairwiseOnDemand]: 13/18 looper letters, 22 selfloop transitions, 8 changer transitions 2/35 dead transitions. [2024-10-31 22:16:29,412 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 35 transitions, 216 flow [2024-10-31 22:16:29,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 22:16:29,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-31 22:16:29,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 48 transitions. [2024-10-31 22:16:29,414 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-10-31 22:16:29,414 INFO L175 Difference]: Start difference. First operand has 25 places, 23 transitions, 106 flow. Second operand 4 states and 48 transitions. [2024-10-31 22:16:29,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 35 transitions, 216 flow [2024-10-31 22:16:29,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 35 transitions, 216 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-31 22:16:29,419 INFO L231 Difference]: Finished difference. Result has 29 places, 22 transitions, 127 flow [2024-10-31 22:16:29,419 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=127, PETRI_PLACES=29, PETRI_TRANSITIONS=22} [2024-10-31 22:16:29,420 INFO L277 CegarLoopForPetriNet]: 20 programPoint places, 9 predicate places. [2024-10-31 22:16:29,420 INFO L471 AbstractCegarLoop]: Abstraction has has 29 places, 22 transitions, 127 flow [2024-10-31 22:16:29,420 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 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) [2024-10-31 22:16:29,420 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:16:29,421 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:16:29,444 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd2b490c-19fa-4c2a-b5b1-25b4891806e2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-31 22:16:29,621 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd2b490c-19fa-4c2a-b5b1-25b4891806e2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:16:29,622 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-31 22:16:29,622 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:16:29,622 INFO L85 PathProgramCache]: Analyzing trace with hash -972711790, now seen corresponding path program 1 times [2024-10-31 22:16:29,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:16:29,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462012753] [2024-10-31 22:16:29,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:16:29,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:16:29,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:16:29,700 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:16:29,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:16:29,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462012753] [2024-10-31 22:16:29,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462012753] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:16:29,701 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:16:29,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-31 22:16:29,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286383329] [2024-10-31 22:16:29,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:16:29,701 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 22:16:29,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:16:29,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 22:16:29,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:16:29,703 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 18 [2024-10-31 22:16:29,704 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 22 transitions, 127 flow. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 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) [2024-10-31 22:16:29,704 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:16:29,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 18 [2024-10-31 22:16:29,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:16:29,821 INFO L124 PetriNetUnfolderBase]: 54/116 cut-off events. [2024-10-31 22:16:29,821 INFO L125 PetriNetUnfolderBase]: For 244/244 co-relation queries the response was YES. [2024-10-31 22:16:29,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 428 conditions, 116 events. 54/116 cut-off events. For 244/244 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 338 event pairs, 4 based on Foata normal form. 6/122 useless extension candidates. Maximal degree in co-relation 220. Up to 44 conditions per place. [2024-10-31 22:16:29,825 INFO L140 encePairwiseOnDemand]: 13/18 looper letters, 29 selfloop transitions, 7 changer transitions 3/42 dead transitions. [2024-10-31 22:16:29,825 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 42 transitions, 293 flow [2024-10-31 22:16:29,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 22:16:29,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-31 22:16:29,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 58 transitions. [2024-10-31 22:16:29,828 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6444444444444445 [2024-10-31 22:16:29,828 INFO L175 Difference]: Start difference. First operand has 29 places, 22 transitions, 127 flow. Second operand 5 states and 58 transitions. [2024-10-31 22:16:29,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 42 transitions, 293 flow [2024-10-31 22:16:29,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 42 transitions, 261 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-10-31 22:16:29,835 INFO L231 Difference]: Finished difference. Result has 33 places, 26 transitions, 161 flow [2024-10-31 22:16:29,835 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=161, PETRI_PLACES=33, PETRI_TRANSITIONS=26} [2024-10-31 22:16:29,836 INFO L277 CegarLoopForPetriNet]: 20 programPoint places, 13 predicate places. [2024-10-31 22:16:29,836 INFO L471 AbstractCegarLoop]: Abstraction has has 33 places, 26 transitions, 161 flow [2024-10-31 22:16:29,837 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 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) [2024-10-31 22:16:29,837 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:16:29,837 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:16:29,837 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-31 22:16:29,838 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-31 22:16:29,838 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:16:29,839 INFO L85 PathProgramCache]: Analyzing trace with hash -733518492, now seen corresponding path program 2 times [2024-10-31 22:16:29,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:16:29,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615530233] [2024-10-31 22:16:29,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:16:29,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:16:29,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:16:29,919 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:16:29,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:16:29,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615530233] [2024-10-31 22:16:29,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615530233] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:16:29,920 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:16:29,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-31 22:16:29,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227315163] [2024-10-31 22:16:29,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:16:29,921 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 22:16:29,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:16:29,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 22:16:29,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:16:29,924 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 18 [2024-10-31 22:16:29,924 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 26 transitions, 161 flow. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 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) [2024-10-31 22:16:29,924 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:16:29,924 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 18 [2024-10-31 22:16:29,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:16:30,006 INFO L124 PetriNetUnfolderBase]: 43/93 cut-off events. [2024-10-31 22:16:30,006 INFO L125 PetriNetUnfolderBase]: For 178/178 co-relation queries the response was YES. [2024-10-31 22:16:30,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 379 conditions, 93 events. 43/93 cut-off events. For 178/178 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 214 event pairs, 5 based on Foata normal form. 4/97 useless extension candidates. Maximal degree in co-relation 286. Up to 76 conditions per place. [2024-10-31 22:16:30,011 INFO L140 encePairwiseOnDemand]: 14/18 looper letters, 22 selfloop transitions, 5 changer transitions 0/30 dead transitions. [2024-10-31 22:16:30,011 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 30 transitions, 225 flow [2024-10-31 22:16:30,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 22:16:30,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-31 22:16:30,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 42 transitions. [2024-10-31 22:16:30,013 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-10-31 22:16:30,013 INFO L175 Difference]: Start difference. First operand has 33 places, 26 transitions, 161 flow. Second operand 4 states and 42 transitions. [2024-10-31 22:16:30,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 30 transitions, 225 flow [2024-10-31 22:16:30,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 30 transitions, 219 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-10-31 22:16:30,018 INFO L231 Difference]: Finished difference. Result has 36 places, 25 transitions, 163 flow [2024-10-31 22:16:30,019 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=163, PETRI_PLACES=36, PETRI_TRANSITIONS=25} [2024-10-31 22:16:30,019 INFO L277 CegarLoopForPetriNet]: 20 programPoint places, 16 predicate places. [2024-10-31 22:16:30,020 INFO L471 AbstractCegarLoop]: Abstraction has has 36 places, 25 transitions, 163 flow [2024-10-31 22:16:30,020 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 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) [2024-10-31 22:16:30,020 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:16:30,020 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:16:30,020 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-31 22:16:30,020 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-31 22:16:30,023 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:16:30,023 INFO L85 PathProgramCache]: Analyzing trace with hash 1230592891, now seen corresponding path program 1 times [2024-10-31 22:16:30,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:16:30,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328955388] [2024-10-31 22:16:30,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:16:30,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:16:30,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:16:30,257 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:16:30,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:16:30,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328955388] [2024-10-31 22:16:30,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328955388] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:16:30,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686649486] [2024-10-31 22:16:30,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:16:30,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:16:30,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd2b490c-19fa-4c2a-b5b1-25b4891806e2/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:16:30,262 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd2b490c-19fa-4c2a-b5b1-25b4891806e2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:16:30,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd2b490c-19fa-4c2a-b5b1-25b4891806e2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-31 22:16:30,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:16:30,330 INFO L255 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-31 22:16:30,331 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:16:30,482 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:16:30,483 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:16:30,660 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:16:30,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686649486] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:16:30,660 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:16:30,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2024-10-31 22:16:30,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571294553] [2024-10-31 22:16:30,661 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:16:30,661 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-31 22:16:30,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:16:30,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-31 22:16:30,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2024-10-31 22:16:30,664 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 18 [2024-10-31 22:16:30,666 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 25 transitions, 163 flow. Second operand has 13 states, 13 states have (on average 7.615384615384615) internal successors, (99), 13 states have internal predecessors, (99), 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) [2024-10-31 22:16:30,666 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:16:30,666 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 18 [2024-10-31 22:16:30,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:16:31,067 INFO L124 PetriNetUnfolderBase]: 129/260 cut-off events. [2024-10-31 22:16:31,067 INFO L125 PetriNetUnfolderBase]: For 679/679 co-relation queries the response was YES. [2024-10-31 22:16:31,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1114 conditions, 260 events. 129/260 cut-off events. For 679/679 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 985 event pairs, 1 based on Foata normal form. 24/284 useless extension candidates. Maximal degree in co-relation 492. Up to 94 conditions per place. [2024-10-31 22:16:31,079 INFO L140 encePairwiseOnDemand]: 12/18 looper letters, 49 selfloop transitions, 32 changer transitions 21/105 dead transitions. [2024-10-31 22:16:31,079 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 105 transitions, 833 flow [2024-10-31 22:16:31,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-10-31 22:16:31,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-10-31 22:16:31,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 182 transitions. [2024-10-31 22:16:31,081 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5947712418300654 [2024-10-31 22:16:31,081 INFO L175 Difference]: Start difference. First operand has 36 places, 25 transitions, 163 flow. Second operand 17 states and 182 transitions. [2024-10-31 22:16:31,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 105 transitions, 833 flow [2024-10-31 22:16:31,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 105 transitions, 810 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-10-31 22:16:31,090 INFO L231 Difference]: Finished difference. Result has 57 places, 52 transitions, 519 flow [2024-10-31 22:16:31,091 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=519, PETRI_PLACES=57, PETRI_TRANSITIONS=52} [2024-10-31 22:16:31,092 INFO L277 CegarLoopForPetriNet]: 20 programPoint places, 37 predicate places. [2024-10-31 22:16:31,092 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 52 transitions, 519 flow [2024-10-31 22:16:31,093 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.615384615384615) internal successors, (99), 13 states have internal predecessors, (99), 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) [2024-10-31 22:16:31,093 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:16:31,093 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:16:31,114 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd2b490c-19fa-4c2a-b5b1-25b4891806e2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-31 22:16:31,293 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd2b490c-19fa-4c2a-b5b1-25b4891806e2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-10-31 22:16:31,294 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-31 22:16:31,294 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:16:31,294 INFO L85 PathProgramCache]: Analyzing trace with hash -18214447, now seen corresponding path program 2 times [2024-10-31 22:16:31,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:16:31,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397073159] [2024-10-31 22:16:31,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:16:31,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:16:31,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:16:31,433 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:16:31,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:16:31,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397073159] [2024-10-31 22:16:31,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397073159] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:16:31,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894075082] [2024-10-31 22:16:31,434 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-31 22:16:31,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:16:31,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd2b490c-19fa-4c2a-b5b1-25b4891806e2/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:16:31,436 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd2b490c-19fa-4c2a-b5b1-25b4891806e2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:16:31,437 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd2b490c-19fa-4c2a-b5b1-25b4891806e2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-31 22:16:31,490 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-31 22:16:31,490 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:16:31,491 INFO L255 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-31 22:16:31,493 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:16:31,628 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:16:31,629 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:16:31,794 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:16:31,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894075082] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:16:31,795 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:16:31,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 11 [2024-10-31 22:16:31,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152380137] [2024-10-31 22:16:31,795 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:16:31,796 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-31 22:16:31,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:16:31,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-31 22:16:31,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2024-10-31 22:16:31,798 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 18 [2024-10-31 22:16:31,798 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 52 transitions, 519 flow. Second operand has 12 states, 12 states have (on average 7.75) internal successors, (93), 12 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:16:31,798 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:16:31,799 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 18 [2024-10-31 22:16:31,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:16:32,119 INFO L124 PetriNetUnfolderBase]: 218/445 cut-off events. [2024-10-31 22:16:32,119 INFO L125 PetriNetUnfolderBase]: For 1966/1966 co-relation queries the response was YES. [2024-10-31 22:16:32,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2352 conditions, 445 events. 218/445 cut-off events. For 1966/1966 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1959 event pairs, 3 based on Foata normal form. 17/462 useless extension candidates. Maximal degree in co-relation 2273. Up to 152 conditions per place. [2024-10-31 22:16:32,126 INFO L140 encePairwiseOnDemand]: 12/18 looper letters, 77 selfloop transitions, 51 changer transitions 14/145 dead transitions. [2024-10-31 22:16:32,126 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 145 transitions, 1592 flow [2024-10-31 22:16:32,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-31 22:16:32,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-10-31 22:16:32,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 144 transitions. [2024-10-31 22:16:32,129 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-10-31 22:16:32,130 INFO L175 Difference]: Start difference. First operand has 57 places, 52 transitions, 519 flow. Second operand 12 states and 144 transitions. [2024-10-31 22:16:32,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 145 transitions, 1592 flow [2024-10-31 22:16:32,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 145 transitions, 1164 flow, removed 214 selfloop flow, removed 2 redundant places. [2024-10-31 22:16:32,148 INFO L231 Difference]: Finished difference. Result has 68 places, 85 transitions, 790 flow [2024-10-31 22:16:32,149 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=365, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=790, PETRI_PLACES=68, PETRI_TRANSITIONS=85} [2024-10-31 22:16:32,149 INFO L277 CegarLoopForPetriNet]: 20 programPoint places, 48 predicate places. [2024-10-31 22:16:32,149 INFO L471 AbstractCegarLoop]: Abstraction has has 68 places, 85 transitions, 790 flow [2024-10-31 22:16:32,150 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.75) internal successors, (93), 12 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:16:32,150 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:16:32,150 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:16:32,170 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd2b490c-19fa-4c2a-b5b1-25b4891806e2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-31 22:16:32,354 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd2b490c-19fa-4c2a-b5b1-25b4891806e2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-10-31 22:16:32,354 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-31 22:16:32,355 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:16:32,355 INFO L85 PathProgramCache]: Analyzing trace with hash -108793195, now seen corresponding path program 3 times [2024-10-31 22:16:32,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:16:32,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151018385] [2024-10-31 22:16:32,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:16:32,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:16:32,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:16:32,441 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:16:32,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:16:32,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151018385] [2024-10-31 22:16:32,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151018385] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:16:32,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536765291] [2024-10-31 22:16:32,442 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-31 22:16:32,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:16:32,442 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd2b490c-19fa-4c2a-b5b1-25b4891806e2/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:16:32,444 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd2b490c-19fa-4c2a-b5b1-25b4891806e2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:16:32,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd2b490c-19fa-4c2a-b5b1-25b4891806e2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-31 22:16:32,511 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-31 22:16:32,512 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:16:32,513 INFO L255 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-31 22:16:32,514 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:16:32,593 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:16:32,593 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:16:32,676 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:16:32,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536765291] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:16:32,677 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:16:32,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 10 [2024-10-31 22:16:32,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384229515] [2024-10-31 22:16:32,678 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:16:32,678 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-31 22:16:32,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:16:32,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-31 22:16:32,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2024-10-31 22:16:32,679 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 18 [2024-10-31 22:16:32,680 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 85 transitions, 790 flow. Second operand has 11 states, 11 states have (on average 7.636363636363637) internal successors, (84), 11 states have internal predecessors, (84), 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) [2024-10-31 22:16:32,680 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:16:32,680 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 18 [2024-10-31 22:16:32,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:16:32,977 INFO L124 PetriNetUnfolderBase]: 232/475 cut-off events. [2024-10-31 22:16:32,977 INFO L125 PetriNetUnfolderBase]: For 2529/2529 co-relation queries the response was YES. [2024-10-31 22:16:32,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2248 conditions, 475 events. 232/475 cut-off events. For 2529/2529 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2141 event pairs, 4 based on Foata normal form. 16/491 useless extension candidates. Maximal degree in co-relation 2150. Up to 141 conditions per place. [2024-10-31 22:16:32,982 INFO L140 encePairwiseOnDemand]: 13/18 looper letters, 81 selfloop transitions, 58 changer transitions 0/142 dead transitions. [2024-10-31 22:16:32,983 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 142 transitions, 1433 flow [2024-10-31 22:16:32,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-31 22:16:32,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-10-31 22:16:32,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 120 transitions. [2024-10-31 22:16:32,984 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6060606060606061 [2024-10-31 22:16:32,984 INFO L175 Difference]: Start difference. First operand has 68 places, 85 transitions, 790 flow. Second operand 11 states and 120 transitions. [2024-10-31 22:16:32,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 142 transitions, 1433 flow [2024-10-31 22:16:32,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 142 transitions, 1280 flow, removed 62 selfloop flow, removed 5 redundant places. [2024-10-31 22:16:33,001 INFO L231 Difference]: Finished difference. Result has 75 places, 104 transitions, 1076 flow [2024-10-31 22:16:33,001 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=616, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1076, PETRI_PLACES=75, PETRI_TRANSITIONS=104} [2024-10-31 22:16:33,002 INFO L277 CegarLoopForPetriNet]: 20 programPoint places, 55 predicate places. [2024-10-31 22:16:33,002 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 104 transitions, 1076 flow [2024-10-31 22:16:33,003 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.636363636363637) internal successors, (84), 11 states have internal predecessors, (84), 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) [2024-10-31 22:16:33,003 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:16:33,003 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:16:33,023 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd2b490c-19fa-4c2a-b5b1-25b4891806e2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-31 22:16:33,203 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd2b490c-19fa-4c2a-b5b1-25b4891806e2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:16:33,204 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-31 22:16:33,204 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:16:33,204 INFO L85 PathProgramCache]: Analyzing trace with hash -1001797831, now seen corresponding path program 4 times [2024-10-31 22:16:33,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:16:33,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609251096] [2024-10-31 22:16:33,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:16:33,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:16:33,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:16:33,264 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:16:33,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:16:33,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609251096] [2024-10-31 22:16:33,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609251096] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:16:33,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264251200] [2024-10-31 22:16:33,265 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-31 22:16:33,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:16:33,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd2b490c-19fa-4c2a-b5b1-25b4891806e2/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:16:33,268 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd2b490c-19fa-4c2a-b5b1-25b4891806e2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:16:33,269 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd2b490c-19fa-4c2a-b5b1-25b4891806e2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-31 22:16:33,321 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-31 22:16:33,321 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:16:33,322 INFO L255 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-31 22:16:33,323 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:16:33,400 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:16:33,401 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:16:33,469 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:16:33,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264251200] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:16:33,469 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:16:33,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2024-10-31 22:16:33,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936370180] [2024-10-31 22:16:33,470 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:16:33,470 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-31 22:16:33,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:16:33,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-31 22:16:33,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2024-10-31 22:16:33,471 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 18 [2024-10-31 22:16:33,472 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 104 transitions, 1076 flow. Second operand has 11 states, 11 states have (on average 7.636363636363637) internal successors, (84), 11 states have internal predecessors, (84), 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) [2024-10-31 22:16:33,472 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:16:33,472 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 18 [2024-10-31 22:16:33,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:16:33,777 INFO L124 PetriNetUnfolderBase]: 292/602 cut-off events. [2024-10-31 22:16:33,777 INFO L125 PetriNetUnfolderBase]: For 2472/2472 co-relation queries the response was YES. [2024-10-31 22:16:33,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3071 conditions, 602 events. 292/602 cut-off events. For 2472/2472 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2903 event pairs, 11 based on Foata normal form. 14/616 useless extension candidates. Maximal degree in co-relation 2504. Up to 294 conditions per place. [2024-10-31 22:16:33,783 INFO L140 encePairwiseOnDemand]: 12/18 looper letters, 97 selfloop transitions, 63 changer transitions 0/163 dead transitions. [2024-10-31 22:16:33,783 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 163 transitions, 1903 flow [2024-10-31 22:16:33,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-31 22:16:33,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-10-31 22:16:33,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 121 transitions. [2024-10-31 22:16:33,785 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5601851851851852 [2024-10-31 22:16:33,785 INFO L175 Difference]: Start difference. First operand has 75 places, 104 transitions, 1076 flow. Second operand 12 states and 121 transitions. [2024-10-31 22:16:33,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 163 transitions, 1903 flow [2024-10-31 22:16:33,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 163 transitions, 1842 flow, removed 29 selfloop flow, removed 1 redundant places. [2024-10-31 22:16:33,802 INFO L231 Difference]: Finished difference. Result has 91 places, 134 transitions, 1634 flow [2024-10-31 22:16:33,802 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=1047, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1634, PETRI_PLACES=91, PETRI_TRANSITIONS=134} [2024-10-31 22:16:33,803 INFO L277 CegarLoopForPetriNet]: 20 programPoint places, 71 predicate places. [2024-10-31 22:16:33,803 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 134 transitions, 1634 flow [2024-10-31 22:16:33,804 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.636363636363637) internal successors, (84), 11 states have internal predecessors, (84), 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) [2024-10-31 22:16:33,804 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:16:33,804 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:16:33,823 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd2b490c-19fa-4c2a-b5b1-25b4891806e2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-31 22:16:34,004 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd2b490c-19fa-4c2a-b5b1-25b4891806e2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:16:34,005 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-31 22:16:34,006 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:16:34,006 INFO L85 PathProgramCache]: Analyzing trace with hash -2045865696, now seen corresponding path program 5 times [2024-10-31 22:16:34,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:16:34,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954502287] [2024-10-31 22:16:34,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:16:34,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:16:34,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:16:34,086 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:16:34,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:16:34,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954502287] [2024-10-31 22:16:34,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954502287] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:16:34,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201688566] [2024-10-31 22:16:34,087 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-31 22:16:34,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:16:34,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd2b490c-19fa-4c2a-b5b1-25b4891806e2/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:16:34,089 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd2b490c-19fa-4c2a-b5b1-25b4891806e2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:16:34,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd2b490c-19fa-4c2a-b5b1-25b4891806e2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-31 22:16:34,143 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-31 22:16:34,143 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:16:34,144 INFO L255 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-31 22:16:34,145 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:16:34,194 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:16:34,195 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:16:34,256 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:16:34,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201688566] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:16:34,257 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:16:34,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2024-10-31 22:16:34,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739632007] [2024-10-31 22:16:34,258 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:16:34,258 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-31 22:16:34,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:16:34,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-31 22:16:34,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2024-10-31 22:16:34,259 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 18 [2024-10-31 22:16:34,260 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 134 transitions, 1634 flow. Second operand has 10 states, 10 states have (on average 7.7) internal successors, (77), 10 states have internal predecessors, (77), 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) [2024-10-31 22:16:34,260 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:16:34,260 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 18 [2024-10-31 22:16:34,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:16:34,500 INFO L124 PetriNetUnfolderBase]: 286/588 cut-off events. [2024-10-31 22:16:34,501 INFO L125 PetriNetUnfolderBase]: For 2668/2668 co-relation queries the response was YES. [2024-10-31 22:16:34,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3316 conditions, 588 events. 286/588 cut-off events. For 2668/2668 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2797 event pairs, 15 based on Foata normal form. 4/592 useless extension candidates. Maximal degree in co-relation 2793. Up to 190 conditions per place. [2024-10-31 22:16:34,508 INFO L140 encePairwiseOnDemand]: 13/18 looper letters, 114 selfloop transitions, 44 changer transitions 5/166 dead transitions. [2024-10-31 22:16:34,508 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 166 transitions, 2175 flow [2024-10-31 22:16:34,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-31 22:16:34,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-10-31 22:16:34,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 93 transitions. [2024-10-31 22:16:34,509 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5740740740740741 [2024-10-31 22:16:34,509 INFO L175 Difference]: Start difference. First operand has 91 places, 134 transitions, 1634 flow. Second operand 9 states and 93 transitions. [2024-10-31 22:16:34,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 166 transitions, 2175 flow [2024-10-31 22:16:34,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 166 transitions, 2066 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-10-31 22:16:34,534 INFO L231 Difference]: Finished difference. Result has 96 places, 135 transitions, 1664 flow [2024-10-31 22:16:34,534 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=1531, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1664, PETRI_PLACES=96, PETRI_TRANSITIONS=135} [2024-10-31 22:16:34,535 INFO L277 CegarLoopForPetriNet]: 20 programPoint places, 76 predicate places. [2024-10-31 22:16:34,535 INFO L471 AbstractCegarLoop]: Abstraction has has 96 places, 135 transitions, 1664 flow [2024-10-31 22:16:34,535 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.7) internal successors, (77), 10 states have internal predecessors, (77), 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) [2024-10-31 22:16:34,535 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:16:34,536 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:16:34,555 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd2b490c-19fa-4c2a-b5b1-25b4891806e2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-31 22:16:34,740 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd2b490c-19fa-4c2a-b5b1-25b4891806e2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-10-31 22:16:34,740 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-31 22:16:34,740 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:16:34,741 INFO L85 PathProgramCache]: Analyzing trace with hash -1087164560, now seen corresponding path program 6 times [2024-10-31 22:16:34,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:16:34,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409507208] [2024-10-31 22:16:34,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:16:34,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:16:34,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:16:34,923 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:16:34,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:16:34,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409507208] [2024-10-31 22:16:34,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409507208] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:16:34,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530091986] [2024-10-31 22:16:34,924 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-31 22:16:34,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:16:34,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd2b490c-19fa-4c2a-b5b1-25b4891806e2/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:16:34,927 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd2b490c-19fa-4c2a-b5b1-25b4891806e2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:16:34,930 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd2b490c-19fa-4c2a-b5b1-25b4891806e2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-31 22:16:34,985 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-10-31 22:16:34,986 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:16:34,986 INFO L255 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-31 22:16:34,987 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:16:35,123 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:16:35,124 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:16:35,216 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:16:35,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530091986] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:16:35,217 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:16:35,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 4] total 14 [2024-10-31 22:16:35,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789144047] [2024-10-31 22:16:35,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:16:35,218 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-31 22:16:35,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:16:35,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-31 22:16:35,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2024-10-31 22:16:35,223 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 18 [2024-10-31 22:16:35,223 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 135 transitions, 1664 flow. Second operand has 15 states, 15 states have (on average 7.666666666666667) internal successors, (115), 15 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:16:35,223 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:16:35,223 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 18 [2024-10-31 22:16:35,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:16:35,626 INFO L124 PetriNetUnfolderBase]: 388/792 cut-off events. [2024-10-31 22:16:35,626 INFO L125 PetriNetUnfolderBase]: For 4458/4458 co-relation queries the response was YES. [2024-10-31 22:16:35,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4453 conditions, 792 events. 388/792 cut-off events. For 4458/4458 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 4136 event pairs, 24 based on Foata normal form. 29/821 useless extension candidates. Maximal degree in co-relation 3923. Up to 502 conditions per place. [2024-10-31 22:16:35,636 INFO L140 encePairwiseOnDemand]: 13/18 looper letters, 156 selfloop transitions, 49 changer transitions 1/209 dead transitions. [2024-10-31 22:16:35,637 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 209 transitions, 2754 flow [2024-10-31 22:16:35,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-31 22:16:35,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-10-31 22:16:35,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 118 transitions. [2024-10-31 22:16:35,638 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6555555555555556 [2024-10-31 22:16:35,638 INFO L175 Difference]: Start difference. First operand has 96 places, 135 transitions, 1664 flow. Second operand 10 states and 118 transitions. [2024-10-31 22:16:35,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 209 transitions, 2754 flow [2024-10-31 22:16:35,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 209 transitions, 2648 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-10-31 22:16:35,672 INFO L231 Difference]: Finished difference. Result has 107 places, 169 transitions, 2158 flow [2024-10-31 22:16:35,672 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=1595, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2158, PETRI_PLACES=107, PETRI_TRANSITIONS=169} [2024-10-31 22:16:35,672 INFO L277 CegarLoopForPetriNet]: 20 programPoint places, 87 predicate places. [2024-10-31 22:16:35,673 INFO L471 AbstractCegarLoop]: Abstraction has has 107 places, 169 transitions, 2158 flow [2024-10-31 22:16:35,673 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 7.666666666666667) internal successors, (115), 15 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:16:35,673 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:16:35,673 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:16:35,698 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd2b490c-19fa-4c2a-b5b1-25b4891806e2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-10-31 22:16:35,877 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd2b490c-19fa-4c2a-b5b1-25b4891806e2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-10-31 22:16:35,877 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-31 22:16:35,877 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:16:35,878 INFO L85 PathProgramCache]: Analyzing trace with hash 1559127082, now seen corresponding path program 7 times [2024-10-31 22:16:35,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:16:35,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470816371] [2024-10-31 22:16:35,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:16:35,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:16:35,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:16:36,029 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:16:36,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:16:36,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470816371] [2024-10-31 22:16:36,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470816371] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:16:36,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004836017] [2024-10-31 22:16:36,030 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-31 22:16:36,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:16:36,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd2b490c-19fa-4c2a-b5b1-25b4891806e2/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:16:36,032 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd2b490c-19fa-4c2a-b5b1-25b4891806e2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:16:36,034 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd2b490c-19fa-4c2a-b5b1-25b4891806e2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-31 22:16:36,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:16:36,087 INFO L255 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-31 22:16:36,088 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:16:36,200 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:16:36,201 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:16:36,229 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-31 22:16:36,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004836017] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:16:36,229 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:16:36,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 4] total 10 [2024-10-31 22:16:36,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804114857] [2024-10-31 22:16:36,230 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:16:36,230 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-31 22:16:36,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:16:36,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-31 22:16:36,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-10-31 22:16:36,231 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 18 [2024-10-31 22:16:36,231 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 169 transitions, 2158 flow. Second operand has 11 states, 11 states have (on average 7.7272727272727275) internal successors, (85), 11 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:16:36,231 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:16:36,231 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 18 [2024-10-31 22:16:36,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:16:36,673 INFO L124 PetriNetUnfolderBase]: 576/1169 cut-off events. [2024-10-31 22:16:36,674 INFO L125 PetriNetUnfolderBase]: For 8650/8650 co-relation queries the response was YES. [2024-10-31 22:16:36,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7112 conditions, 1169 events. 576/1169 cut-off events. For 8650/8650 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 6812 event pairs, 41 based on Foata normal form. 19/1188 useless extension candidates. Maximal degree in co-relation 6398. Up to 719 conditions per place. [2024-10-31 22:16:36,688 INFO L140 encePairwiseOnDemand]: 12/18 looper letters, 188 selfloop transitions, 89 changer transitions 5/285 dead transitions. [2024-10-31 22:16:36,688 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 285 transitions, 4037 flow [2024-10-31 22:16:36,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-31 22:16:36,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-10-31 22:16:36,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 127 transitions. [2024-10-31 22:16:36,690 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6414141414141414 [2024-10-31 22:16:36,690 INFO L175 Difference]: Start difference. First operand has 107 places, 169 transitions, 2158 flow. Second operand 11 states and 127 transitions. [2024-10-31 22:16:36,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 285 transitions, 4037 flow [2024-10-31 22:16:36,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 285 transitions, 3940 flow, removed 30 selfloop flow, removed 3 redundant places. [2024-10-31 22:16:36,747 INFO L231 Difference]: Finished difference. Result has 122 places, 236 transitions, 3396 flow [2024-10-31 22:16:36,747 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=2068, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3396, PETRI_PLACES=122, PETRI_TRANSITIONS=236} [2024-10-31 22:16:36,749 INFO L277 CegarLoopForPetriNet]: 20 programPoint places, 102 predicate places. [2024-10-31 22:16:36,749 INFO L471 AbstractCegarLoop]: Abstraction has has 122 places, 236 transitions, 3396 flow [2024-10-31 22:16:36,750 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.7272727272727275) internal successors, (85), 11 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:16:36,750 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:16:36,750 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:16:36,771 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd2b490c-19fa-4c2a-b5b1-25b4891806e2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-10-31 22:16:36,954 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd2b490c-19fa-4c2a-b5b1-25b4891806e2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-10-31 22:16:36,954 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-31 22:16:36,955 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:16:36,955 INFO L85 PathProgramCache]: Analyzing trace with hash -1018235034, now seen corresponding path program 8 times [2024-10-31 22:16:36,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:16:36,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106816428] [2024-10-31 22:16:36,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:16:36,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:16:36,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:16:37,071 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:16:37,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:16:37,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106816428] [2024-10-31 22:16:37,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106816428] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:16:37,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136094768] [2024-10-31 22:16:37,072 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-31 22:16:37,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:16:37,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd2b490c-19fa-4c2a-b5b1-25b4891806e2/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:16:37,073 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd2b490c-19fa-4c2a-b5b1-25b4891806e2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:16:37,075 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd2b490c-19fa-4c2a-b5b1-25b4891806e2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-31 22:16:37,127 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-31 22:16:37,127 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:16:37,128 INFO L255 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-31 22:16:37,130 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:16:37,274 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:16:37,274 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:16:37,326 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:16:37,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136094768] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:16:37,327 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:16:37,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 4] total 14 [2024-10-31 22:16:37,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329613663] [2024-10-31 22:16:37,328 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:16:37,328 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-31 22:16:37,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:16:37,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-31 22:16:37,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2024-10-31 22:16:37,330 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 18 [2024-10-31 22:16:37,330 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 236 transitions, 3396 flow. Second operand has 15 states, 15 states have (on average 7.6) internal successors, (114), 15 states have internal predecessors, (114), 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) [2024-10-31 22:16:37,330 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:16:37,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 18 [2024-10-31 22:16:37,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:16:37,846 INFO L124 PetriNetUnfolderBase]: 681/1349 cut-off events. [2024-10-31 22:16:37,847 INFO L125 PetriNetUnfolderBase]: For 15564/15564 co-relation queries the response was YES. [2024-10-31 22:16:37,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9293 conditions, 1349 events. 681/1349 cut-off events. For 15564/15564 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 8026 event pairs, 59 based on Foata normal form. 36/1385 useless extension candidates. Maximal degree in co-relation 8696. Up to 980 conditions per place. [2024-10-31 22:16:37,867 INFO L140 encePairwiseOnDemand]: 13/18 looper letters, 230 selfloop transitions, 81 changer transitions 5/319 dead transitions. [2024-10-31 22:16:37,868 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 319 transitions, 5070 flow [2024-10-31 22:16:37,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-31 22:16:37,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-10-31 22:16:37,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 112 transitions. [2024-10-31 22:16:37,869 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6222222222222222 [2024-10-31 22:16:37,869 INFO L175 Difference]: Start difference. First operand has 122 places, 236 transitions, 3396 flow. Second operand 10 states and 112 transitions. [2024-10-31 22:16:37,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 319 transitions, 5070 flow [2024-10-31 22:16:37,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 319 transitions, 4817 flow, removed 125 selfloop flow, removed 1 redundant places. [2024-10-31 22:16:37,977 INFO L231 Difference]: Finished difference. Result has 135 places, 278 transitions, 4076 flow [2024-10-31 22:16:37,978 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=3080, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4076, PETRI_PLACES=135, PETRI_TRANSITIONS=278} [2024-10-31 22:16:37,978 INFO L277 CegarLoopForPetriNet]: 20 programPoint places, 115 predicate places. [2024-10-31 22:16:37,978 INFO L471 AbstractCegarLoop]: Abstraction has has 135 places, 278 transitions, 4076 flow [2024-10-31 22:16:37,979 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 7.6) internal successors, (114), 15 states have internal predecessors, (114), 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) [2024-10-31 22:16:37,979 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:16:37,979 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:16:37,999 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd2b490c-19fa-4c2a-b5b1-25b4891806e2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-10-31 22:16:38,183 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd2b490c-19fa-4c2a-b5b1-25b4891806e2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-10-31 22:16:38,183 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-31 22:16:38,184 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:16:38,184 INFO L85 PathProgramCache]: Analyzing trace with hash -602127284, now seen corresponding path program 9 times [2024-10-31 22:16:38,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:16:38,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184194272] [2024-10-31 22:16:38,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:16:38,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:16:38,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:16:38,261 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:16:38,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:16:38,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184194272] [2024-10-31 22:16:38,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184194272] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:16:38,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814210109] [2024-10-31 22:16:38,262 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-31 22:16:38,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:16:38,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd2b490c-19fa-4c2a-b5b1-25b4891806e2/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:16:38,264 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd2b490c-19fa-4c2a-b5b1-25b4891806e2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:16:38,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd2b490c-19fa-4c2a-b5b1-25b4891806e2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-31 22:16:38,317 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-10-31 22:16:38,318 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:16:38,319 INFO L255 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-31 22:16:38,320 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:16:38,391 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-31 22:16:38,391 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-31 22:16:38,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814210109] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:16:38,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-31 22:16:38,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 12 [2024-10-31 22:16:38,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609194569] [2024-10-31 22:16:38,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:16:38,392 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-31 22:16:38,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:16:38,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-31 22:16:38,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2024-10-31 22:16:38,393 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 18 [2024-10-31 22:16:38,394 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 278 transitions, 4076 flow. Second operand has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 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) [2024-10-31 22:16:38,394 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:16:38,394 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 18 [2024-10-31 22:16:38,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:16:38,903 INFO L124 PetriNetUnfolderBase]: 676/1312 cut-off events. [2024-10-31 22:16:38,904 INFO L125 PetriNetUnfolderBase]: For 16219/16219 co-relation queries the response was YES. [2024-10-31 22:16:38,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9418 conditions, 1312 events. 676/1312 cut-off events. For 16219/16219 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 7686 event pairs, 8 based on Foata normal form. 14/1326 useless extension candidates. Maximal degree in co-relation 9185. Up to 625 conditions per place. [2024-10-31 22:16:38,943 INFO L140 encePairwiseOnDemand]: 13/18 looper letters, 212 selfloop transitions, 16 changer transitions 74/305 dead transitions. [2024-10-31 22:16:38,943 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 305 transitions, 4951 flow [2024-10-31 22:16:38,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-31 22:16:38,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-31 22:16:38,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 61 transitions. [2024-10-31 22:16:38,947 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5648148148148148 [2024-10-31 22:16:38,947 INFO L175 Difference]: Start difference. First operand has 135 places, 278 transitions, 4076 flow. Second operand 6 states and 61 transitions. [2024-10-31 22:16:38,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 305 transitions, 4951 flow [2024-10-31 22:16:39,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 305 transitions, 4767 flow, removed 81 selfloop flow, removed 3 redundant places. [2024-10-31 22:16:39,075 INFO L231 Difference]: Finished difference. Result has 139 places, 224 transitions, 3274 flow [2024-10-31 22:16:39,076 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=3896, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3274, PETRI_PLACES=139, PETRI_TRANSITIONS=224} [2024-10-31 22:16:39,077 INFO L277 CegarLoopForPetriNet]: 20 programPoint places, 119 predicate places. [2024-10-31 22:16:39,078 INFO L471 AbstractCegarLoop]: Abstraction has has 139 places, 224 transitions, 3274 flow [2024-10-31 22:16:39,079 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 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) [2024-10-31 22:16:39,079 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:16:39,079 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:16:39,102 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd2b490c-19fa-4c2a-b5b1-25b4891806e2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-10-31 22:16:39,279 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd2b490c-19fa-4c2a-b5b1-25b4891806e2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-10-31 22:16:39,280 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-31 22:16:39,280 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:16:39,280 INFO L85 PathProgramCache]: Analyzing trace with hash 685748318, now seen corresponding path program 10 times [2024-10-31 22:16:39,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:16:39,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524750619] [2024-10-31 22:16:39,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:16:39,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:16:39,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:16:39,406 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:16:39,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:16:39,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524750619] [2024-10-31 22:16:39,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524750619] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:16:39,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785734721] [2024-10-31 22:16:39,407 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-31 22:16:39,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:16:39,407 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd2b490c-19fa-4c2a-b5b1-25b4891806e2/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:16:39,409 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd2b490c-19fa-4c2a-b5b1-25b4891806e2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:16:39,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd2b490c-19fa-4c2a-b5b1-25b4891806e2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-31 22:16:39,464 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-31 22:16:39,465 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:16:39,466 INFO L255 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-31 22:16:39,467 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:16:39,576 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:16:39,576 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:16:39,704 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:16:39,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785734721] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:16:39,705 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:16:39,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 15 [2024-10-31 22:16:39,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053167396] [2024-10-31 22:16:39,705 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:16:39,706 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-10-31 22:16:39,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:16:39,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-10-31 22:16:39,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2024-10-31 22:16:39,707 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 18 [2024-10-31 22:16:39,707 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 224 transitions, 3274 flow. Second operand has 16 states, 16 states have (on average 7.1875) internal successors, (115), 16 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:16:39,708 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:16:39,708 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 18 [2024-10-31 22:16:39,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:16:40,340 INFO L124 PetriNetUnfolderBase]: 519/1067 cut-off events. [2024-10-31 22:16:40,340 INFO L125 PetriNetUnfolderBase]: For 17071/17071 co-relation queries the response was YES. [2024-10-31 22:16:40,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8055 conditions, 1067 events. 519/1067 cut-off events. For 17071/17071 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 6267 event pairs, 6 based on Foata normal form. 4/1071 useless extension candidates. Maximal degree in co-relation 7833. Up to 281 conditions per place. [2024-10-31 22:16:40,355 INFO L140 encePairwiseOnDemand]: 13/18 looper letters, 101 selfloop transitions, 207 changer transitions 2/313 dead transitions. [2024-10-31 22:16:40,355 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 313 transitions, 5015 flow [2024-10-31 22:16:40,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-10-31 22:16:40,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-10-31 22:16:40,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 189 transitions. [2024-10-31 22:16:40,357 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5526315789473685 [2024-10-31 22:16:40,357 INFO L175 Difference]: Start difference. First operand has 139 places, 224 transitions, 3274 flow. Second operand 19 states and 189 transitions. [2024-10-31 22:16:40,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 313 transitions, 5015 flow [2024-10-31 22:16:40,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 313 transitions, 4803 flow, removed 57 selfloop flow, removed 9 redundant places. [2024-10-31 22:16:40,452 INFO L231 Difference]: Finished difference. Result has 147 places, 261 transitions, 4608 flow [2024-10-31 22:16:40,453 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=3118, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=4608, PETRI_PLACES=147, PETRI_TRANSITIONS=261} [2024-10-31 22:16:40,453 INFO L277 CegarLoopForPetriNet]: 20 programPoint places, 127 predicate places. [2024-10-31 22:16:40,454 INFO L471 AbstractCegarLoop]: Abstraction has has 147 places, 261 transitions, 4608 flow [2024-10-31 22:16:40,454 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 7.1875) internal successors, (115), 16 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:16:40,454 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:16:40,454 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:16:40,475 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd2b490c-19fa-4c2a-b5b1-25b4891806e2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-10-31 22:16:40,655 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd2b490c-19fa-4c2a-b5b1-25b4891806e2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-10-31 22:16:40,655 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-31 22:16:40,655 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:16:40,655 INFO L85 PathProgramCache]: Analyzing trace with hash -1321107271, now seen corresponding path program 11 times [2024-10-31 22:16:40,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:16:40,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839066970] [2024-10-31 22:16:40,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:16:40,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:16:40,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:16:40,746 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:16:40,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:16:40,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839066970] [2024-10-31 22:16:40,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839066970] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:16:40,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239699743] [2024-10-31 22:16:40,746 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-31 22:16:40,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:16:40,747 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd2b490c-19fa-4c2a-b5b1-25b4891806e2/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:16:40,748 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd2b490c-19fa-4c2a-b5b1-25b4891806e2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:16:40,749 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd2b490c-19fa-4c2a-b5b1-25b4891806e2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-10-31 22:16:40,801 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-10-31 22:16:40,801 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:16:40,804 INFO L255 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-31 22:16:40,808 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:16:40,915 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:16:40,915 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:16:41,009 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:16:41,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [239699743] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:16:41,010 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:16:41,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 15 [2024-10-31 22:16:41,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448467405] [2024-10-31 22:16:41,010 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:16:41,010 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-10-31 22:16:41,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:16:41,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-10-31 22:16:41,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2024-10-31 22:16:41,011 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 18 [2024-10-31 22:16:41,012 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 261 transitions, 4608 flow. Second operand has 16 states, 16 states have (on average 7.1875) internal successors, (115), 16 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:16:41,012 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:16:41,012 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 18 [2024-10-31 22:16:41,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:16:41,496 INFO L124 PetriNetUnfolderBase]: 551/1079 cut-off events. [2024-10-31 22:16:41,496 INFO L125 PetriNetUnfolderBase]: For 17556/17556 co-relation queries the response was YES. [2024-10-31 22:16:41,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9150 conditions, 1079 events. 551/1079 cut-off events. For 17556/17556 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 6095 event pairs, 6 based on Foata normal form. 4/1083 useless extension candidates. Maximal degree in co-relation 8780. Up to 610 conditions per place. [2024-10-31 22:16:41,511 INFO L140 encePairwiseOnDemand]: 13/18 looper letters, 228 selfloop transitions, 62 changer transitions 28/321 dead transitions. [2024-10-31 22:16:41,511 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 321 transitions, 6134 flow [2024-10-31 22:16:41,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-10-31 22:16:41,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-10-31 22:16:41,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 154 transitions. [2024-10-31 22:16:41,513 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5032679738562091 [2024-10-31 22:16:41,513 INFO L175 Difference]: Start difference. First operand has 147 places, 261 transitions, 4608 flow. Second operand 17 states and 154 transitions. [2024-10-31 22:16:41,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 321 transitions, 6134 flow [2024-10-31 22:16:41,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 321 transitions, 5664 flow, removed 232 selfloop flow, removed 2 redundant places. [2024-10-31 22:16:41,637 INFO L231 Difference]: Finished difference. Result has 163 places, 271 transitions, 4556 flow [2024-10-31 22:16:41,638 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=4204, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=4556, PETRI_PLACES=163, PETRI_TRANSITIONS=271} [2024-10-31 22:16:41,638 INFO L277 CegarLoopForPetriNet]: 20 programPoint places, 143 predicate places. [2024-10-31 22:16:41,638 INFO L471 AbstractCegarLoop]: Abstraction has has 163 places, 271 transitions, 4556 flow [2024-10-31 22:16:41,639 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 7.1875) internal successors, (115), 16 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:16:41,639 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:16:41,639 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:16:41,658 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd2b490c-19fa-4c2a-b5b1-25b4891806e2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-10-31 22:16:41,839 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd2b490c-19fa-4c2a-b5b1-25b4891806e2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-10-31 22:16:41,840 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-31 22:16:41,840 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:16:41,840 INFO L85 PathProgramCache]: Analyzing trace with hash 1963286468, now seen corresponding path program 12 times [2024-10-31 22:16:41,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:16:41,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475835426] [2024-10-31 22:16:41,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:16:41,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:16:41,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:16:41,911 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:16:41,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:16:41,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475835426] [2024-10-31 22:16:41,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475835426] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:16:41,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142801409] [2024-10-31 22:16:41,912 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-31 22:16:41,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:16:41,912 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd2b490c-19fa-4c2a-b5b1-25b4891806e2/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:16:41,914 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd2b490c-19fa-4c2a-b5b1-25b4891806e2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:16:41,917 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd2b490c-19fa-4c2a-b5b1-25b4891806e2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-10-31 22:16:41,972 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-10-31 22:16:41,972 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:16:41,973 INFO L255 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-31 22:16:41,974 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:16:42,065 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:16:42,066 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:16:42,173 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:16:42,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142801409] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:16:42,173 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:16:42,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2024-10-31 22:16:42,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249080539] [2024-10-31 22:16:42,174 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:16:42,174 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-31 22:16:42,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:16:42,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-31 22:16:42,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2024-10-31 22:16:42,175 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 18 [2024-10-31 22:16:42,176 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 271 transitions, 4556 flow. Second operand has 15 states, 15 states have (on average 7.2) internal successors, (108), 15 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:16:42,176 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:16:42,176 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 18 [2024-10-31 22:16:42,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:16:42,779 INFO L124 PetriNetUnfolderBase]: 570/1141 cut-off events. [2024-10-31 22:16:42,779 INFO L125 PetriNetUnfolderBase]: For 12331/12331 co-relation queries the response was YES. [2024-10-31 22:16:42,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8741 conditions, 1141 events. 570/1141 cut-off events. For 12331/12331 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 6538 event pairs, 2 based on Foata normal form. 24/1165 useless extension candidates. Maximal degree in co-relation 8430. Up to 323 conditions per place. [2024-10-31 22:16:42,795 INFO L140 encePairwiseOnDemand]: 12/18 looper letters, 126 selfloop transitions, 221 changer transitions 2/352 dead transitions. [2024-10-31 22:16:42,796 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 352 transitions, 6265 flow [2024-10-31 22:16:42,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-10-31 22:16:42,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-10-31 22:16:42,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 157 transitions. [2024-10-31 22:16:42,797 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5451388888888888 [2024-10-31 22:16:42,797 INFO L175 Difference]: Start difference. First operand has 163 places, 271 transitions, 4556 flow. Second operand 16 states and 157 transitions. [2024-10-31 22:16:42,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 352 transitions, 6265 flow [2024-10-31 22:16:42,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 352 transitions, 6088 flow, removed 79 selfloop flow, removed 4 redundant places. [2024-10-31 22:16:42,896 INFO L231 Difference]: Finished difference. Result has 177 places, 312 transitions, 5966 flow [2024-10-31 22:16:42,897 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=4365, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=179, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=5966, PETRI_PLACES=177, PETRI_TRANSITIONS=312} [2024-10-31 22:16:42,897 INFO L277 CegarLoopForPetriNet]: 20 programPoint places, 157 predicate places. [2024-10-31 22:16:42,898 INFO L471 AbstractCegarLoop]: Abstraction has has 177 places, 312 transitions, 5966 flow [2024-10-31 22:16:42,898 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 7.2) internal successors, (108), 15 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:16:42,898 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:16:42,898 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:16:42,918 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd2b490c-19fa-4c2a-b5b1-25b4891806e2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-10-31 22:16:43,099 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd2b490c-19fa-4c2a-b5b1-25b4891806e2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-10-31 22:16:43,099 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-31 22:16:43,100 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:16:43,100 INFO L85 PathProgramCache]: Analyzing trace with hash 1671206709, now seen corresponding path program 13 times [2024-10-31 22:16:43,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:16:43,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387347010] [2024-10-31 22:16:43,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:16:43,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:16:43,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:16:43,200 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:16:43,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:16:43,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387347010] [2024-10-31 22:16:43,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387347010] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:16:43,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444887223] [2024-10-31 22:16:43,202 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-31 22:16:43,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:16:43,202 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd2b490c-19fa-4c2a-b5b1-25b4891806e2/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:16:43,204 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd2b490c-19fa-4c2a-b5b1-25b4891806e2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:16:43,205 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd2b490c-19fa-4c2a-b5b1-25b4891806e2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-10-31 22:16:43,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:16:43,259 INFO L255 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-31 22:16:43,261 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:16:43,346 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:16:43,347 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:16:43,436 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:16:43,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444887223] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:16:43,437 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:16:43,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2024-10-31 22:16:43,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342850127] [2024-10-31 22:16:43,437 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:16:43,438 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-31 22:16:43,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:16:43,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-31 22:16:43,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2024-10-31 22:16:43,439 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 18 [2024-10-31 22:16:43,439 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 312 transitions, 5966 flow. Second operand has 15 states, 15 states have (on average 7.2) internal successors, (108), 15 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:16:43,439 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:16:43,439 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 18 [2024-10-31 22:16:43,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:16:43,984 INFO L124 PetriNetUnfolderBase]: 599/1191 cut-off events. [2024-10-31 22:16:43,985 INFO L125 PetriNetUnfolderBase]: For 17733/17733 co-relation queries the response was YES. [2024-10-31 22:16:43,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10337 conditions, 1191 events. 599/1191 cut-off events. For 17733/17733 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 6838 event pairs, 5 based on Foata normal form. 20/1211 useless extension candidates. Maximal degree in co-relation 9319. Up to 550 conditions per place. [2024-10-31 22:16:44,031 INFO L140 encePairwiseOnDemand]: 12/18 looper letters, 227 selfloop transitions, 129 changer transitions 19/378 dead transitions. [2024-10-31 22:16:44,032 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 378 transitions, 7825 flow [2024-10-31 22:16:44,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-10-31 22:16:44,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-10-31 22:16:44,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 156 transitions. [2024-10-31 22:16:44,033 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2024-10-31 22:16:44,033 INFO L175 Difference]: Start difference. First operand has 177 places, 312 transitions, 5966 flow. Second operand 16 states and 156 transitions. [2024-10-31 22:16:44,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 378 transitions, 7825 flow [2024-10-31 22:16:44,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 378 transitions, 7543 flow, removed 122 selfloop flow, removed 4 redundant places. [2024-10-31 22:16:44,181 INFO L231 Difference]: Finished difference. Result has 195 places, 331 transitions, 6788 flow [2024-10-31 22:16:44,182 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=5543, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=6788, PETRI_PLACES=195, PETRI_TRANSITIONS=331} [2024-10-31 22:16:44,182 INFO L277 CegarLoopForPetriNet]: 20 programPoint places, 175 predicate places. [2024-10-31 22:16:44,182 INFO L471 AbstractCegarLoop]: Abstraction has has 195 places, 331 transitions, 6788 flow [2024-10-31 22:16:44,183 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 7.2) internal successors, (108), 15 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:16:44,183 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:16:44,183 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:16:44,196 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd2b490c-19fa-4c2a-b5b1-25b4891806e2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-10-31 22:16:44,383 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd2b490c-19fa-4c2a-b5b1-25b4891806e2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-10-31 22:16:44,383 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-31 22:16:44,384 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:16:44,384 INFO L85 PathProgramCache]: Analyzing trace with hash -969198971, now seen corresponding path program 14 times [2024-10-31 22:16:44,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:16:44,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674147050] [2024-10-31 22:16:44,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:16:44,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:16:44,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:16:44,515 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:16:44,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:16:44,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674147050] [2024-10-31 22:16:44,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674147050] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:16:44,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090056792] [2024-10-31 22:16:44,516 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-31 22:16:44,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:16:44,516 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd2b490c-19fa-4c2a-b5b1-25b4891806e2/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:16:44,518 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd2b490c-19fa-4c2a-b5b1-25b4891806e2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:16:44,521 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd2b490c-19fa-4c2a-b5b1-25b4891806e2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-10-31 22:16:44,574 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-31 22:16:44,574 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:16:44,575 INFO L255 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-31 22:16:44,576 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:16:44,673 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:16:44,673 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:16:44,785 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:16:44,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090056792] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:16:44,785 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:16:44,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 15 [2024-10-31 22:16:44,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619771422] [2024-10-31 22:16:44,786 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:16:44,786 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-10-31 22:16:44,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:16:44,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-10-31 22:16:44,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2024-10-31 22:16:44,787 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 18 [2024-10-31 22:16:44,787 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 331 transitions, 6788 flow. Second operand has 16 states, 16 states have (on average 7.1875) internal successors, (115), 16 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:16:44,787 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:16:44,787 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 18 [2024-10-31 22:16:44,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:16:45,427 INFO L124 PetriNetUnfolderBase]: 558/1096 cut-off events. [2024-10-31 22:16:45,427 INFO L125 PetriNetUnfolderBase]: For 16730/16730 co-relation queries the response was YES. [2024-10-31 22:16:45,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9771 conditions, 1096 events. 558/1096 cut-off events. For 16730/16730 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 6050 event pairs, 4 based on Foata normal form. 14/1110 useless extension candidates. Maximal degree in co-relation 9678. Up to 550 conditions per place. [2024-10-31 22:16:45,444 INFO L140 encePairwiseOnDemand]: 12/18 looper letters, 222 selfloop transitions, 120 changer transitions 5/350 dead transitions. [2024-10-31 22:16:45,444 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 350 transitions, 7351 flow [2024-10-31 22:16:45,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-10-31 22:16:45,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-10-31 22:16:45,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 160 transitions. [2024-10-31 22:16:45,446 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5228758169934641 [2024-10-31 22:16:45,446 INFO L175 Difference]: Start difference. First operand has 195 places, 331 transitions, 6788 flow. Second operand 17 states and 160 transitions. [2024-10-31 22:16:45,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 350 transitions, 7351 flow [2024-10-31 22:16:45,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 350 transitions, 6883 flow, removed 222 selfloop flow, removed 5 redundant places. [2024-10-31 22:16:45,625 INFO L231 Difference]: Finished difference. Result has 205 places, 319 transitions, 6256 flow [2024-10-31 22:16:45,625 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=6095, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=323, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=6256, PETRI_PLACES=205, PETRI_TRANSITIONS=319} [2024-10-31 22:16:45,626 INFO L277 CegarLoopForPetriNet]: 20 programPoint places, 185 predicate places. [2024-10-31 22:16:45,626 INFO L471 AbstractCegarLoop]: Abstraction has has 205 places, 319 transitions, 6256 flow [2024-10-31 22:16:45,627 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 7.1875) internal successors, (115), 16 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:16:45,627 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:16:45,627 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:16:45,647 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd2b490c-19fa-4c2a-b5b1-25b4891806e2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-10-31 22:16:45,827 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd2b490c-19fa-4c2a-b5b1-25b4891806e2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:16:45,828 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-31 22:16:45,828 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:16:45,828 INFO L85 PathProgramCache]: Analyzing trace with hash -1536537335, now seen corresponding path program 15 times [2024-10-31 22:16:45,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:16:45,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693645345] [2024-10-31 22:16:45,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:16:45,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:16:45,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:16:45,914 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:16:45,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:16:45,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693645345] [2024-10-31 22:16:45,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693645345] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:16:45,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283171204] [2024-10-31 22:16:45,915 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-31 22:16:45,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:16:45,915 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd2b490c-19fa-4c2a-b5b1-25b4891806e2/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:16:45,917 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd2b490c-19fa-4c2a-b5b1-25b4891806e2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:16:45,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd2b490c-19fa-4c2a-b5b1-25b4891806e2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-10-31 22:16:45,970 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-10-31 22:16:45,970 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:16:45,971 INFO L255 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-31 22:16:45,972 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:16:46,032 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-31 22:16:46,033 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-31 22:16:46,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1283171204] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:16:46,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-31 22:16:46,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 12 [2024-10-31 22:16:46,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875375979] [2024-10-31 22:16:46,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:16:46,034 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-31 22:16:46,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:16:46,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-31 22:16:46,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2024-10-31 22:16:46,035 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 18 [2024-10-31 22:16:46,035 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 319 transitions, 6256 flow. Second operand has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 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) [2024-10-31 22:16:46,035 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:16:46,035 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 18 [2024-10-31 22:16:46,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:16:46,444 INFO L124 PetriNetUnfolderBase]: 552/1059 cut-off events. [2024-10-31 22:16:46,444 INFO L125 PetriNetUnfolderBase]: For 12770/12772 co-relation queries the response was YES. [2024-10-31 22:16:46,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9336 conditions, 1059 events. 552/1059 cut-off events. For 12770/12772 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 5706 event pairs, 9 based on Foata normal form. 13/1072 useless extension candidates. Maximal degree in co-relation 9187. Up to 541 conditions per place. [2024-10-31 22:16:46,462 INFO L140 encePairwiseOnDemand]: 13/18 looper letters, 214 selfloop transitions, 24 changer transitions 99/340 dead transitions. [2024-10-31 22:16:46,462 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 340 transitions, 7236 flow [2024-10-31 22:16:46,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-31 22:16:46,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-31 22:16:46,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 56 transitions. [2024-10-31 22:16:46,463 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5185185185185185 [2024-10-31 22:16:46,463 INFO L175 Difference]: Start difference. First operand has 205 places, 319 transitions, 6256 flow. Second operand 6 states and 56 transitions. [2024-10-31 22:16:46,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 340 transitions, 7236 flow [2024-10-31 22:16:46,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 340 transitions, 7004 flow, removed 1 selfloop flow, removed 14 redundant places. [2024-10-31 22:16:46,602 INFO L231 Difference]: Finished difference. Result has 198 places, 235 transitions, 4433 flow [2024-10-31 22:16:46,603 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=6028, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=319, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4433, PETRI_PLACES=198, PETRI_TRANSITIONS=235} [2024-10-31 22:16:46,603 INFO L277 CegarLoopForPetriNet]: 20 programPoint places, 178 predicate places. [2024-10-31 22:16:46,604 INFO L471 AbstractCegarLoop]: Abstraction has has 198 places, 235 transitions, 4433 flow [2024-10-31 22:16:46,604 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 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) [2024-10-31 22:16:46,604 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:16:46,604 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:16:46,627 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd2b490c-19fa-4c2a-b5b1-25b4891806e2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-10-31 22:16:46,805 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd2b490c-19fa-4c2a-b5b1-25b4891806e2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:16:46,805 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-31 22:16:46,805 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:16:46,805 INFO L85 PathProgramCache]: Analyzing trace with hash -1782150499, now seen corresponding path program 16 times [2024-10-31 22:16:46,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:16:46,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665794990] [2024-10-31 22:16:46,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:16:46,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:16:46,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:16:46,881 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:16:46,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:16:46,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665794990] [2024-10-31 22:16:46,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665794990] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:16:46,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752824188] [2024-10-31 22:16:46,882 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-31 22:16:46,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:16:46,883 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd2b490c-19fa-4c2a-b5b1-25b4891806e2/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:16:46,885 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd2b490c-19fa-4c2a-b5b1-25b4891806e2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:16:46,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd2b490c-19fa-4c2a-b5b1-25b4891806e2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-10-31 22:16:46,937 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-31 22:16:46,937 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:16:46,938 INFO L255 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-31 22:16:46,940 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:16:47,020 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:16:47,020 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:16:47,116 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:16:47,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752824188] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:16:47,117 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:16:47,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2024-10-31 22:16:47,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801521324] [2024-10-31 22:16:47,117 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:16:47,117 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-31 22:16:47,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:16:47,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-31 22:16:47,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2024-10-31 22:16:47,119 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 18 [2024-10-31 22:16:47,119 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 235 transitions, 4433 flow. Second operand has 15 states, 15 states have (on average 7.2) internal successors, (108), 15 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:16:47,119 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:16:47,120 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 18 [2024-10-31 22:16:47,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:16:47,538 INFO L124 PetriNetUnfolderBase]: 444/822 cut-off events. [2024-10-31 22:16:47,538 INFO L125 PetriNetUnfolderBase]: For 9880/9880 co-relation queries the response was YES. [2024-10-31 22:16:47,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7094 conditions, 822 events. 444/822 cut-off events. For 9880/9880 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 3925 event pairs, 3 based on Foata normal form. 12/830 useless extension candidates. Maximal degree in co-relation 6960. Up to 315 conditions per place. [2024-10-31 22:16:47,549 INFO L140 encePairwiseOnDemand]: 12/18 looper letters, 138 selfloop transitions, 147 changer transitions 4/292 dead transitions. [2024-10-31 22:16:47,550 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 292 transitions, 5581 flow [2024-10-31 22:16:47,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-31 22:16:47,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-10-31 22:16:47,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 130 transitions. [2024-10-31 22:16:47,551 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5158730158730159 [2024-10-31 22:16:47,551 INFO L175 Difference]: Start difference. First operand has 198 places, 235 transitions, 4433 flow. Second operand 14 states and 130 transitions. [2024-10-31 22:16:47,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 292 transitions, 5581 flow [2024-10-31 22:16:47,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 292 transitions, 5305 flow, removed 59 selfloop flow, removed 13 redundant places. [2024-10-31 22:16:47,649 INFO L231 Difference]: Finished difference. Result has 185 places, 267 transitions, 4956 flow [2024-10-31 22:16:47,650 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=4168, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=4956, PETRI_PLACES=185, PETRI_TRANSITIONS=267} [2024-10-31 22:16:47,650 INFO L277 CegarLoopForPetriNet]: 20 programPoint places, 165 predicate places. [2024-10-31 22:16:47,650 INFO L471 AbstractCegarLoop]: Abstraction has has 185 places, 267 transitions, 4956 flow [2024-10-31 22:16:47,651 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 7.2) internal successors, (108), 15 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:16:47,651 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:16:47,651 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:16:47,671 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd2b490c-19fa-4c2a-b5b1-25b4891806e2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-10-31 22:16:47,851 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd2b490c-19fa-4c2a-b5b1-25b4891806e2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-10-31 22:16:47,852 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-31 22:16:47,853 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:16:47,853 INFO L85 PathProgramCache]: Analyzing trace with hash 1776840379, now seen corresponding path program 17 times [2024-10-31 22:16:47,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:16:47,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326200399] [2024-10-31 22:16:47,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:16:47,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:16:47,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:16:47,936 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:16:47,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:16:47,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326200399] [2024-10-31 22:16:47,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326200399] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:16:47,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009854805] [2024-10-31 22:16:47,937 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-31 22:16:47,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:16:47,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd2b490c-19fa-4c2a-b5b1-25b4891806e2/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:16:47,939 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd2b490c-19fa-4c2a-b5b1-25b4891806e2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:16:47,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd2b490c-19fa-4c2a-b5b1-25b4891806e2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-10-31 22:16:47,992 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-10-31 22:16:47,992 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:16:47,993 INFO L255 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-31 22:16:47,994 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:16:48,074 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:16:48,074 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:16:48,179 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:16:48,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009854805] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:16:48,180 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:16:48,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 15 [2024-10-31 22:16:48,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190480104] [2024-10-31 22:16:48,180 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:16:48,180 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-10-31 22:16:48,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:16:48,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-10-31 22:16:48,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2024-10-31 22:16:48,181 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 18 [2024-10-31 22:16:48,181 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 267 transitions, 4956 flow. Second operand has 16 states, 16 states have (on average 7.1875) internal successors, (115), 16 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:16:48,181 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:16:48,181 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 18 [2024-10-31 22:16:48,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:16:48,661 INFO L124 PetriNetUnfolderBase]: 474/892 cut-off events. [2024-10-31 22:16:48,662 INFO L125 PetriNetUnfolderBase]: For 10438/10438 co-relation queries the response was YES. [2024-10-31 22:16:48,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7814 conditions, 892 events. 474/892 cut-off events. For 10438/10438 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 4428 event pairs, 4 based on Foata normal form. 5/895 useless extension candidates. Maximal degree in co-relation 7418. Up to 331 conditions per place. [2024-10-31 22:16:48,674 INFO L140 encePairwiseOnDemand]: 13/18 looper letters, 128 selfloop transitions, 184 changer transitions 6/321 dead transitions. [2024-10-31 22:16:48,675 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 321 transitions, 6332 flow [2024-10-31 22:16:48,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-10-31 22:16:48,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-10-31 22:16:48,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 143 transitions. [2024-10-31 22:16:48,676 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5296296296296297 [2024-10-31 22:16:48,676 INFO L175 Difference]: Start difference. First operand has 185 places, 267 transitions, 4956 flow. Second operand 15 states and 143 transitions. [2024-10-31 22:16:48,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 321 transitions, 6332 flow [2024-10-31 22:16:48,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 321 transitions, 6195 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-10-31 22:16:48,768 INFO L231 Difference]: Finished difference. Result has 197 places, 284 transitions, 5939 flow [2024-10-31 22:16:48,769 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=4826, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=5939, PETRI_PLACES=197, PETRI_TRANSITIONS=284} [2024-10-31 22:16:48,769 INFO L277 CegarLoopForPetriNet]: 20 programPoint places, 177 predicate places. [2024-10-31 22:16:48,770 INFO L471 AbstractCegarLoop]: Abstraction has has 197 places, 284 transitions, 5939 flow [2024-10-31 22:16:48,770 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 7.1875) internal successors, (115), 16 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:16:48,770 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:16:48,770 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:16:48,791 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd2b490c-19fa-4c2a-b5b1-25b4891806e2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-10-31 22:16:48,974 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd2b490c-19fa-4c2a-b5b1-25b4891806e2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-10-31 22:16:48,974 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-31 22:16:48,975 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:16:48,976 INFO L85 PathProgramCache]: Analyzing trace with hash -1530199125, now seen corresponding path program 18 times [2024-10-31 22:16:48,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:16:48,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555057648] [2024-10-31 22:16:48,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:16:48,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:16:48,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:16:49,152 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:16:49,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:16:49,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555057648] [2024-10-31 22:16:49,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555057648] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:16:49,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820118156] [2024-10-31 22:16:49,153 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-31 22:16:49,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:16:49,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd2b490c-19fa-4c2a-b5b1-25b4891806e2/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:16:49,155 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd2b490c-19fa-4c2a-b5b1-25b4891806e2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:16:49,156 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd2b490c-19fa-4c2a-b5b1-25b4891806e2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-10-31 22:16:49,211 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-10-31 22:16:49,211 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:16:49,213 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-10-31 22:16:49,214 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:16:49,386 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:16:49,386 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:16:49,466 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:16:49,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820118156] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:16:49,467 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:16:49,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 5] total 19 [2024-10-31 22:16:49,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112304369] [2024-10-31 22:16:49,467 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:16:49,468 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-10-31 22:16:49,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:16:49,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-10-31 22:16:49,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2024-10-31 22:16:49,471 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 18 [2024-10-31 22:16:49,471 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 284 transitions, 5939 flow. Second operand has 20 states, 20 states have (on average 7.2) internal successors, (144), 20 states have internal predecessors, (144), 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) [2024-10-31 22:16:49,472 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:16:49,472 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 18 [2024-10-31 22:16:49,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:16:50,018 INFO L124 PetriNetUnfolderBase]: 569/1065 cut-off events. [2024-10-31 22:16:50,018 INFO L125 PetriNetUnfolderBase]: For 15335/15335 co-relation queries the response was YES. [2024-10-31 22:16:50,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10026 conditions, 1065 events. 569/1065 cut-off events. For 15335/15335 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 5545 event pairs, 9 based on Foata normal form. 31/1096 useless extension candidates. Maximal degree in co-relation 9617. Up to 670 conditions per place. [2024-10-31 22:16:50,032 INFO L140 encePairwiseOnDemand]: 13/18 looper letters, 236 selfloop transitions, 113 changer transitions 21/373 dead transitions. [2024-10-31 22:16:50,032 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 373 transitions, 8086 flow [2024-10-31 22:16:50,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-31 22:16:50,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-10-31 22:16:50,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 144 transitions. [2024-10-31 22:16:50,036 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6153846153846154 [2024-10-31 22:16:50,036 INFO L175 Difference]: Start difference. First operand has 197 places, 284 transitions, 5939 flow. Second operand 13 states and 144 transitions. [2024-10-31 22:16:50,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 373 transitions, 8086 flow [2024-10-31 22:16:50,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 373 transitions, 7884 flow, removed 89 selfloop flow, removed 4 redundant places. [2024-10-31 22:16:50,199 INFO L231 Difference]: Finished difference. Result has 213 places, 333 transitions, 7068 flow [2024-10-31 22:16:50,199 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=5757, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=7068, PETRI_PLACES=213, PETRI_TRANSITIONS=333} [2024-10-31 22:16:50,200 INFO L277 CegarLoopForPetriNet]: 20 programPoint places, 193 predicate places. [2024-10-31 22:16:50,200 INFO L471 AbstractCegarLoop]: Abstraction has has 213 places, 333 transitions, 7068 flow [2024-10-31 22:16:50,200 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 7.2) internal successors, (144), 20 states have internal predecessors, (144), 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) [2024-10-31 22:16:50,200 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:16:50,201 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:16:50,219 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd2b490c-19fa-4c2a-b5b1-25b4891806e2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-10-31 22:16:50,405 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd2b490c-19fa-4c2a-b5b1-25b4891806e2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:16:50,405 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-31 22:16:50,405 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:16:50,405 INFO L85 PathProgramCache]: Analyzing trace with hash 577034413, now seen corresponding path program 19 times [2024-10-31 22:16:50,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:16:50,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347079969] [2024-10-31 22:16:50,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:16:50,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:16:50,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:16:50,538 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:16:50,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:16:50,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347079969] [2024-10-31 22:16:50,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347079969] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:16:50,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783968289] [2024-10-31 22:16:50,539 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-31 22:16:50,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:16:50,539 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd2b490c-19fa-4c2a-b5b1-25b4891806e2/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:16:50,541 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd2b490c-19fa-4c2a-b5b1-25b4891806e2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:16:50,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd2b490c-19fa-4c2a-b5b1-25b4891806e2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-10-31 22:16:50,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:16:50,594 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-10-31 22:16:50,595 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:16:50,761 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:16:50,762 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:16:50,837 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-31 22:16:50,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783968289] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:16:50,838 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:16:50,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 5] total 13 [2024-10-31 22:16:50,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332938406] [2024-10-31 22:16:50,838 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:16:50,838 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-31 22:16:50,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:16:50,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-31 22:16:50,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2024-10-31 22:16:50,839 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 18 [2024-10-31 22:16:50,839 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 333 transitions, 7068 flow. Second operand has 14 states, 14 states have (on average 7.5) internal successors, (105), 14 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:16:50,840 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:16:50,840 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 18 [2024-10-31 22:16:50,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:16:51,560 INFO L124 PetriNetUnfolderBase]: 739/1383 cut-off events. [2024-10-31 22:16:51,560 INFO L125 PetriNetUnfolderBase]: For 23674/23674 co-relation queries the response was YES. [2024-10-31 22:16:51,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13664 conditions, 1383 events. 739/1383 cut-off events. For 23674/23674 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 7653 event pairs, 9 based on Foata normal form. 13/1396 useless extension candidates. Maximal degree in co-relation 13186. Up to 841 conditions per place. [2024-10-31 22:16:51,572 INFO L140 encePairwiseOnDemand]: 12/18 looper letters, 284 selfloop transitions, 154 changer transitions 25/466 dead transitions. [2024-10-31 22:16:51,572 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 466 transitions, 10579 flow [2024-10-31 22:16:51,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-31 22:16:51,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-10-31 22:16:51,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 153 transitions. [2024-10-31 22:16:51,574 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6071428571428571 [2024-10-31 22:16:51,574 INFO L175 Difference]: Start difference. First operand has 213 places, 333 transitions, 7068 flow. Second operand 14 states and 153 transitions. [2024-10-31 22:16:51,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 466 transitions, 10579 flow [2024-10-31 22:16:51,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 466 transitions, 10445 flow, removed 34 selfloop flow, removed 4 redundant places. [2024-10-31 22:16:51,718 INFO L231 Difference]: Finished difference. Result has 231 places, 402 transitions, 9002 flow [2024-10-31 22:16:51,718 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=6938, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=9002, PETRI_PLACES=231, PETRI_TRANSITIONS=402} [2024-10-31 22:16:51,719 INFO L277 CegarLoopForPetriNet]: 20 programPoint places, 211 predicate places. [2024-10-31 22:16:51,719 INFO L471 AbstractCegarLoop]: Abstraction has has 231 places, 402 transitions, 9002 flow [2024-10-31 22:16:51,719 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.5) internal successors, (105), 14 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:16:51,719 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:16:51,720 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:16:51,740 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd2b490c-19fa-4c2a-b5b1-25b4891806e2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-10-31 22:16:51,920 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd2b490c-19fa-4c2a-b5b1-25b4891806e2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:16:51,920 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-31 22:16:51,921 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:16:51,921 INFO L85 PathProgramCache]: Analyzing trace with hash -1578356599, now seen corresponding path program 20 times [2024-10-31 22:16:51,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:16:51,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370655007] [2024-10-31 22:16:51,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:16:51,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:16:51,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:16:52,048 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:16:52,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:16:52,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370655007] [2024-10-31 22:16:52,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370655007] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:16:52,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639017494] [2024-10-31 22:16:52,049 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-31 22:16:52,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:16:52,049 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd2b490c-19fa-4c2a-b5b1-25b4891806e2/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:16:52,051 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd2b490c-19fa-4c2a-b5b1-25b4891806e2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:16:52,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd2b490c-19fa-4c2a-b5b1-25b4891806e2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-10-31 22:16:52,106 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-31 22:16:52,106 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:16:52,107 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-10-31 22:16:52,108 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:16:52,255 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:16:52,255 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:16:52,326 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-31 22:16:52,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639017494] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:16:52,326 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:16:52,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 5] total 18 [2024-10-31 22:16:52,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727369921] [2024-10-31 22:16:52,326 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:16:52,327 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-10-31 22:16:52,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:16:52,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-10-31 22:16:52,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2024-10-31 22:16:52,328 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 18 [2024-10-31 22:16:52,328 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 402 transitions, 9002 flow. Second operand has 19 states, 19 states have (on average 7.368421052631579) internal successors, (140), 19 states have internal predecessors, (140), 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) [2024-10-31 22:16:52,328 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:16:52,328 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 18 [2024-10-31 22:16:52,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:16:53,036 INFO L124 PetriNetUnfolderBase]: 880/1636 cut-off events. [2024-10-31 22:16:53,036 INFO L125 PetriNetUnfolderBase]: For 50743/50743 co-relation queries the response was YES. [2024-10-31 22:16:53,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17795 conditions, 1636 events. 880/1636 cut-off events. For 50743/50743 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 9288 event pairs, 9 based on Foata normal form. 47/1683 useless extension candidates. Maximal degree in co-relation 17434. Up to 944 conditions per place. [2024-10-31 22:16:53,053 INFO L140 encePairwiseOnDemand]: 12/18 looper letters, 307 selfloop transitions, 189 changer transitions 35/534 dead transitions. [2024-10-31 22:16:53,053 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 534 transitions, 13044 flow [2024-10-31 22:16:53,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-10-31 22:16:53,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-10-31 22:16:53,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 183 transitions. [2024-10-31 22:16:53,055 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5980392156862745 [2024-10-31 22:16:53,055 INFO L175 Difference]: Start difference. First operand has 231 places, 402 transitions, 9002 flow. Second operand 17 states and 183 transitions. [2024-10-31 22:16:53,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 534 transitions, 13044 flow [2024-10-31 22:16:53,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 534 transitions, 12478 flow, removed 239 selfloop flow, removed 5 redundant places. [2024-10-31 22:16:53,363 INFO L231 Difference]: Finished difference. Result has 252 places, 466 transitions, 10573 flow [2024-10-31 22:16:53,364 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=8374, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=10573, PETRI_PLACES=252, PETRI_TRANSITIONS=466} [2024-10-31 22:16:53,364 INFO L277 CegarLoopForPetriNet]: 20 programPoint places, 232 predicate places. [2024-10-31 22:16:53,364 INFO L471 AbstractCegarLoop]: Abstraction has has 252 places, 466 transitions, 10573 flow [2024-10-31 22:16:53,364 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 7.368421052631579) internal successors, (140), 19 states have internal predecessors, (140), 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) [2024-10-31 22:16:53,364 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:16:53,364 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:16:53,377 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd2b490c-19fa-4c2a-b5b1-25b4891806e2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-10-31 22:16:53,565 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd2b490c-19fa-4c2a-b5b1-25b4891806e2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-10-31 22:16:53,565 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-31 22:16:53,565 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:16:53,565 INFO L85 PathProgramCache]: Analyzing trace with hash 1669566385, now seen corresponding path program 21 times [2024-10-31 22:16:53,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:16:53,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732438769] [2024-10-31 22:16:53,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:16:53,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:16:53,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:16:53,706 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:16:53,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:16:53,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732438769] [2024-10-31 22:16:53,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732438769] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:16:53,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414265120] [2024-10-31 22:16:53,707 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-31 22:16:53,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:16:53,707 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd2b490c-19fa-4c2a-b5b1-25b4891806e2/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:16:53,709 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd2b490c-19fa-4c2a-b5b1-25b4891806e2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:16:53,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd2b490c-19fa-4c2a-b5b1-25b4891806e2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-10-31 22:16:53,763 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-10-31 22:16:53,763 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:16:53,764 INFO L255 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-31 22:16:53,765 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:16:53,832 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-31 22:16:53,832 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-31 22:16:53,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414265120] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:16:53,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-31 22:16:53,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 14 [2024-10-31 22:16:53,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236214685] [2024-10-31 22:16:53,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:16:53,833 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-31 22:16:53,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:16:53,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-31 22:16:53,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2024-10-31 22:16:53,834 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 18 [2024-10-31 22:16:53,834 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 466 transitions, 10573 flow. Second operand has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 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) [2024-10-31 22:16:53,835 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:16:53,835 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 18 [2024-10-31 22:16:53,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:16:54,507 INFO L124 PetriNetUnfolderBase]: 860/1714 cut-off events. [2024-10-31 22:16:54,507 INFO L125 PetriNetUnfolderBase]: For 64280/64282 co-relation queries the response was YES. [2024-10-31 22:16:54,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18928 conditions, 1714 events. 860/1714 cut-off events. For 64280/64282 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 10540 event pairs, 12 based on Foata normal form. 18/1732 useless extension candidates. Maximal degree in co-relation 18116. Up to 1194 conditions per place. [2024-10-31 22:16:54,528 INFO L140 encePairwiseOnDemand]: 13/18 looper letters, 452 selfloop transitions, 29 changer transitions 26/510 dead transitions. [2024-10-31 22:16:54,528 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 510 transitions, 12455 flow [2024-10-31 22:16:54,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-31 22:16:54,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-31 22:16:54,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 60 transitions. [2024-10-31 22:16:54,529 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2024-10-31 22:16:54,529 INFO L175 Difference]: Start difference. First operand has 252 places, 466 transitions, 10573 flow. Second operand 6 states and 60 transitions. [2024-10-31 22:16:54,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 510 transitions, 12455 flow [2024-10-31 22:16:54,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 510 transitions, 11727 flow, removed 264 selfloop flow, removed 5 redundant places. [2024-10-31 22:16:54,951 INFO L231 Difference]: Finished difference. Result has 252 places, 460 transitions, 9896 flow [2024-10-31 22:16:54,952 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=9876, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=437, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=9896, PETRI_PLACES=252, PETRI_TRANSITIONS=460} [2024-10-31 22:16:54,952 INFO L277 CegarLoopForPetriNet]: 20 programPoint places, 232 predicate places. [2024-10-31 22:16:54,953 INFO L471 AbstractCegarLoop]: Abstraction has has 252 places, 460 transitions, 9896 flow [2024-10-31 22:16:54,953 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 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) [2024-10-31 22:16:54,953 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:16:54,953 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:16:54,965 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd2b490c-19fa-4c2a-b5b1-25b4891806e2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-10-31 22:16:55,153 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd2b490c-19fa-4c2a-b5b1-25b4891806e2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-10-31 22:16:55,154 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-31 22:16:55,154 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:16:55,154 INFO L85 PathProgramCache]: Analyzing trace with hash 1590918145, now seen corresponding path program 22 times [2024-10-31 22:16:55,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:16:55,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36606313] [2024-10-31 22:16:55,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:16:55,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:16:55,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:16:55,382 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:16:55,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:16:55,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36606313] [2024-10-31 22:16:55,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36606313] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:16:55,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524545544] [2024-10-31 22:16:55,383 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-31 22:16:55,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:16:55,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd2b490c-19fa-4c2a-b5b1-25b4891806e2/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:16:55,386 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd2b490c-19fa-4c2a-b5b1-25b4891806e2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:16:55,387 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd2b490c-19fa-4c2a-b5b1-25b4891806e2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-10-31 22:16:55,440 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-31 22:16:55,441 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:16:55,442 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-10-31 22:16:55,443 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:16:55,650 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:16:55,650 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:16:55,733 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:16:55,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524545544] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:16:55,734 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:16:55,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 5] total 19 [2024-10-31 22:16:55,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698216593] [2024-10-31 22:16:55,734 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:16:55,736 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-10-31 22:16:55,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:16:55,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-10-31 22:16:55,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2024-10-31 22:16:55,737 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 18 [2024-10-31 22:16:55,737 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 460 transitions, 9896 flow. Second operand has 20 states, 20 states have (on average 7.2) internal successors, (144), 20 states have internal predecessors, (144), 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) [2024-10-31 22:16:55,738 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:16:55,738 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 18 [2024-10-31 22:16:55,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:16:56,526 INFO L124 PetriNetUnfolderBase]: 872/1634 cut-off events. [2024-10-31 22:16:56,526 INFO L125 PetriNetUnfolderBase]: For 40543/40543 co-relation queries the response was YES. [2024-10-31 22:16:56,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16614 conditions, 1634 events. 872/1634 cut-off events. For 40543/40543 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 9317 event pairs, 26 based on Foata normal form. 1/1635 useless extension candidates. Maximal degree in co-relation 16371. Up to 1335 conditions per place. [2024-10-31 22:16:56,542 INFO L140 encePairwiseOnDemand]: 13/18 looper letters, 417 selfloop transitions, 99 changer transitions 5/524 dead transitions. [2024-10-31 22:16:56,542 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 524 transitions, 12045 flow [2024-10-31 22:16:56,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-31 22:16:56,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-10-31 22:16:56,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 118 transitions. [2024-10-31 22:16:56,543 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5042735042735043 [2024-10-31 22:16:56,543 INFO L175 Difference]: Start difference. First operand has 252 places, 460 transitions, 9896 flow. Second operand 13 states and 118 transitions. [2024-10-31 22:16:56,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 524 transitions, 12045 flow [2024-10-31 22:16:56,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 524 transitions, 11644 flow, removed 62 selfloop flow, removed 9 redundant places. [2024-10-31 22:16:56,873 INFO L231 Difference]: Finished difference. Result has 253 places, 503 transitions, 10625 flow [2024-10-31 22:16:56,873 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=9564, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=460, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=389, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=10625, PETRI_PLACES=253, PETRI_TRANSITIONS=503} [2024-10-31 22:16:56,873 INFO L277 CegarLoopForPetriNet]: 20 programPoint places, 233 predicate places. [2024-10-31 22:16:56,874 INFO L471 AbstractCegarLoop]: Abstraction has has 253 places, 503 transitions, 10625 flow [2024-10-31 22:16:56,874 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 7.2) internal successors, (144), 20 states have internal predecessors, (144), 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) [2024-10-31 22:16:56,874 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:16:56,874 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:16:56,889 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd2b490c-19fa-4c2a-b5b1-25b4891806e2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0