./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-counter-fun.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_66e4e052-a721-435e-a36d-649c33e2a528/bin/uautomizer-verify-4GaUIPS5ZU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66e4e052-a721-435e-a36d-649c33e2a528/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_66e4e052-a721-435e-a36d-649c33e2a528/bin/uautomizer-verify-4GaUIPS5ZU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66e4e052-a721-435e-a36d-649c33e2a528/bin/uautomizer-verify-4GaUIPS5ZU/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-counter-fun.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66e4e052-a721-435e-a36d-649c33e2a528/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_66e4e052-a721-435e-a36d-649c33e2a528/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 fbe9f324c9eba6beb8c990e3f85f0b00a68548fe05ffdb4e97bc061354d1cdf2 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-10-31 22:00:06,065 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-31 22:00:06,161 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66e4e052-a721-435e-a36d-649c33e2a528/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-31 22:00:06,166 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-31 22:00:06,166 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-31 22:00:06,207 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-31 22:00:06,208 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-31 22:00:06,209 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-31 22:00:06,209 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-31 22:00:06,210 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-31 22:00:06,211 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-31 22:00:06,212 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-31 22:00:06,212 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-31 22:00:06,213 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-31 22:00:06,215 INFO L153 SettingsManager]: * Use SBE=true [2024-10-31 22:00:06,216 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-31 22:00:06,216 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-31 22:00:06,217 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-31 22:00:06,217 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-31 22:00:06,217 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-31 22:00:06,218 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-31 22:00:06,220 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-31 22:00:06,220 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-31 22:00:06,221 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-31 22:00:06,221 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-31 22:00:06,221 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-31 22:00:06,222 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-31 22:00:06,222 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-31 22:00:06,222 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-31 22:00:06,223 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-31 22:00:06,223 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-31 22:00:06,223 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-31 22:00:06,224 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 22:00:06,227 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-31 22:00:06,228 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-31 22:00:06,228 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-31 22:00:06,229 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-31 22:00:06,229 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-31 22:00:06,230 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-31 22:00:06,230 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-31 22:00:06,230 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-31 22:00:06,230 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-31 22:00:06,231 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_66e4e052-a721-435e-a36d-649c33e2a528/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66e4e052-a721-435e-a36d-649c33e2a528/bin/uautomizer-verify-4GaUIPS5ZU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fbe9f324c9eba6beb8c990e3f85f0b00a68548fe05ffdb4e97bc061354d1cdf2 [2024-10-31 22:00:06,589 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-31 22:00:06,616 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-31 22:00:06,620 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-31 22:00:06,622 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-31 22:00:06,623 INFO L274 PluginConnector]: CDTParser initialized [2024-10-31 22:00:06,624 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66e4e052-a721-435e-a36d-649c33e2a528/bin/uautomizer-verify-4GaUIPS5ZU/../../sv-benchmarks/c/weaver/popl20-counter-fun.wvr.c Unable to find full path for "g++" [2024-10-31 22:00:08,831 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-31 22:00:09,161 INFO L384 CDTParser]: Found 1 translation units. [2024-10-31 22:00:09,161 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66e4e052-a721-435e-a36d-649c33e2a528/sv-benchmarks/c/weaver/popl20-counter-fun.wvr.c [2024-10-31 22:00:09,169 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66e4e052-a721-435e-a36d-649c33e2a528/bin/uautomizer-verify-4GaUIPS5ZU/data/eb1eb40ed/0bfd720cae4f40908e753e53d40abaea/FLAG756cbce9b [2024-10-31 22:00:09,464 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66e4e052-a721-435e-a36d-649c33e2a528/bin/uautomizer-verify-4GaUIPS5ZU/data/eb1eb40ed/0bfd720cae4f40908e753e53d40abaea [2024-10-31 22:00:09,466 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-31 22:00:09,467 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-31 22:00:09,469 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-31 22:00:09,469 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-31 22:00:09,479 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-31 22:00:09,480 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 10:00:09" (1/1) ... [2024-10-31 22:00:09,483 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53293ff6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:00:09, skipping insertion in model container [2024-10-31 22:00:09,484 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 10:00:09" (1/1) ... [2024-10-31 22:00:09,517 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-31 22:00:09,731 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_66e4e052-a721-435e-a36d-649c33e2a528/sv-benchmarks/c/weaver/popl20-counter-fun.wvr.c[2707,2720] [2024-10-31 22:00:09,741 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 22:00:09,750 INFO L200 MainTranslator]: Completed pre-run [2024-10-31 22:00:09,772 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_66e4e052-a721-435e-a36d-649c33e2a528/sv-benchmarks/c/weaver/popl20-counter-fun.wvr.c[2707,2720] [2024-10-31 22:00:09,776 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 22:00:09,797 INFO L204 MainTranslator]: Completed translation [2024-10-31 22:00:09,797 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:00:09 WrapperNode [2024-10-31 22:00:09,797 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-31 22:00:09,799 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-31 22:00:09,799 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-31 22:00:09,799 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-31 22:00:09,807 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:00:09" (1/1) ... [2024-10-31 22:00:09,815 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:00:09" (1/1) ... [2024-10-31 22:00:09,845 INFO L138 Inliner]: procedures = 23, calls = 35, calls flagged for inlining = 13, calls inlined = 15, statements flattened = 191 [2024-10-31 22:00:09,845 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-31 22:00:09,846 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-31 22:00:09,846 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-31 22:00:09,846 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-31 22:00:09,859 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:00:09" (1/1) ... [2024-10-31 22:00:09,859 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:00:09" (1/1) ... [2024-10-31 22:00:09,862 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:00:09" (1/1) ... [2024-10-31 22:00:09,878 INFO L175 MemorySlicer]: Split 14 memory accesses to 2 slices as follows [2, 12]. 86 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2024-10-31 22:00:09,879 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:00:09" (1/1) ... [2024-10-31 22:00:09,879 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:00:09" (1/1) ... [2024-10-31 22:00:09,888 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:00:09" (1/1) ... [2024-10-31 22:00:09,893 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:00:09" (1/1) ... [2024-10-31 22:00:09,895 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:00:09" (1/1) ... [2024-10-31 22:00:09,896 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:00:09" (1/1) ... [2024-10-31 22:00:09,899 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-31 22:00:09,900 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-31 22:00:09,901 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-31 22:00:09,901 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-31 22:00:09,902 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:00:09" (1/1) ... [2024-10-31 22:00:09,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 22:00:09,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66e4e052-a721-435e-a36d-649c33e2a528/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:00:09,949 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66e4e052-a721-435e-a36d-649c33e2a528/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-31 22:00:09,956 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66e4e052-a721-435e-a36d-649c33e2a528/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-31 22:00:09,990 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-31 22:00:09,991 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-10-31 22:00:09,991 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-10-31 22:00:09,991 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-10-31 22:00:09,991 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-10-31 22:00:09,991 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-31 22:00:09,991 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-31 22:00:09,992 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-31 22:00:09,992 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-31 22:00:09,992 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-10-31 22:00:09,992 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-10-31 22:00:09,992 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-31 22:00:09,992 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-31 22:00:09,992 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-31 22:00:09,992 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-31 22:00:09,993 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-31 22:00:09,996 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 22:00:10,144 INFO L238 CfgBuilder]: Building ICFG [2024-10-31 22:00:10,147 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-31 22:00:10,654 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-31 22:00:10,654 INFO L287 CfgBuilder]: Performing block encoding [2024-10-31 22:00:11,008 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-31 22:00:11,008 INFO L316 CfgBuilder]: Removed 4 assume(true) statements. [2024-10-31 22:00:11,009 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 10:00:11 BoogieIcfgContainer [2024-10-31 22:00:11,009 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-31 22:00:11,012 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-31 22:00:11,012 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-31 22:00:11,016 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-31 22:00:11,016 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.10 10:00:09" (1/3) ... [2024-10-31 22:00:11,017 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65b5b69c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 10:00:11, skipping insertion in model container [2024-10-31 22:00:11,017 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:00:09" (2/3) ... [2024-10-31 22:00:11,018 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65b5b69c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 10:00:11, skipping insertion in model container [2024-10-31 22:00:11,018 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 10:00:11" (3/3) ... [2024-10-31 22:00:11,019 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-counter-fun.wvr.c [2024-10-31 22:00:11,039 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-31 22:00:11,039 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-31 22:00:11,039 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-31 22:00:11,088 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-10-31 22:00:11,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 29 places, 26 transitions, 66 flow [2024-10-31 22:00:11,165 INFO L124 PetriNetUnfolderBase]: 4/24 cut-off events. [2024-10-31 22:00:11,170 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-31 22:00:11,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33 conditions, 24 events. 4/24 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 28 event pairs, 0 based on Foata normal form. 0/19 useless extension candidates. Maximal degree in co-relation 15. Up to 2 conditions per place. [2024-10-31 22:00:11,176 INFO L82 GeneralOperation]: Start removeDead. Operand has 29 places, 26 transitions, 66 flow [2024-10-31 22:00:11,179 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 26 places, 23 transitions, 58 flow [2024-10-31 22:00:11,191 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-31 22:00:11,198 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;@280873e8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-31 22:00:11,198 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-10-31 22:00:11,212 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-31 22:00:11,212 INFO L124 PetriNetUnfolderBase]: 4/22 cut-off events. [2024-10-31 22:00:11,212 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-31 22:00:11,213 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:00:11,213 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:00:11,215 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 22:00:11,221 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:00:11,221 INFO L85 PathProgramCache]: Analyzing trace with hash -917773730, now seen corresponding path program 1 times [2024-10-31 22:00:11,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:00:11,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128195004] [2024-10-31 22:00:11,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:00:11,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:00:11,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:00:11,633 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 22:00:11,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:00:11,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128195004] [2024-10-31 22:00:11,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128195004] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:00:11,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:00:11,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-31 22:00:11,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369825784] [2024-10-31 22:00:11,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:00:11,650 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 22:00:11,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:00:11,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 22:00:11,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 22:00:11,691 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 26 [2024-10-31 22:00:11,693 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 23 transitions, 58 flow. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 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 22:00:11,694 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:00:11,694 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 26 [2024-10-31 22:00:11,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:00:11,849 INFO L124 PetriNetUnfolderBase]: 94/185 cut-off events. [2024-10-31 22:00:11,850 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2024-10-31 22:00:11,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 379 conditions, 185 events. 94/185 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 598 event pairs, 22 based on Foata normal form. 1/183 useless extension candidates. Maximal degree in co-relation 317. Up to 113 conditions per place. [2024-10-31 22:00:11,854 INFO L140 encePairwiseOnDemand]: 22/26 looper letters, 27 selfloop transitions, 3 changer transitions 1/34 dead transitions. [2024-10-31 22:00:11,854 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 34 transitions, 151 flow [2024-10-31 22:00:11,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 22:00:11,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-31 22:00:11,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 47 transitions. [2024-10-31 22:00:11,870 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6025641025641025 [2024-10-31 22:00:11,872 INFO L175 Difference]: Start difference. First operand has 26 places, 23 transitions, 58 flow. Second operand 3 states and 47 transitions. [2024-10-31 22:00:11,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 34 transitions, 151 flow [2024-10-31 22:00:11,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 34 transitions, 137 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-31 22:00:11,877 INFO L231 Difference]: Finished difference. Result has 25 places, 25 transitions, 69 flow [2024-10-31 22:00:11,879 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=69, PETRI_PLACES=25, PETRI_TRANSITIONS=25} [2024-10-31 22:00:11,883 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, -1 predicate places. [2024-10-31 22:00:11,883 INFO L471 AbstractCegarLoop]: Abstraction has has 25 places, 25 transitions, 69 flow [2024-10-31 22:00:11,884 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 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 22:00:11,884 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:00:11,884 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:00:11,884 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-31 22:00:11,885 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 22:00:11,885 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:00:11,886 INFO L85 PathProgramCache]: Analyzing trace with hash -1358368092, now seen corresponding path program 1 times [2024-10-31 22:00:11,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:00:11,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642932750] [2024-10-31 22:00:11,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:00:11,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:00:11,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:00:12,185 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 22:00:12,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:00:12,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642932750] [2024-10-31 22:00:12,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642932750] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:00:12,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:00:12,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-31 22:00:12,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237481916] [2024-10-31 22:00:12,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:00:12,188 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 22:00:12,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:00:12,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 22:00:12,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-10-31 22:00:12,204 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 26 [2024-10-31 22:00:12,204 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 25 transitions, 69 flow. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 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 22:00:12,204 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:00:12,205 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 26 [2024-10-31 22:00:12,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:00:12,445 INFO L124 PetriNetUnfolderBase]: 188/338 cut-off events. [2024-10-31 22:00:12,445 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2024-10-31 22:00:12,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 760 conditions, 338 events. 188/338 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1342 event pairs, 62 based on Foata normal form. 0/308 useless extension candidates. Maximal degree in co-relation 197. Up to 187 conditions per place. [2024-10-31 22:00:12,452 INFO L140 encePairwiseOnDemand]: 19/26 looper letters, 39 selfloop transitions, 9 changer transitions 1/51 dead transitions. [2024-10-31 22:00:12,454 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 51 transitions, 240 flow [2024-10-31 22:00:12,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 22:00:12,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-31 22:00:12,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 65 transitions. [2024-10-31 22:00:12,458 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-10-31 22:00:12,458 INFO L175 Difference]: Start difference. First operand has 25 places, 25 transitions, 69 flow. Second operand 5 states and 65 transitions. [2024-10-31 22:00:12,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 51 transitions, 240 flow [2024-10-31 22:00:12,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 51 transitions, 233 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-31 22:00:12,464 INFO L231 Difference]: Finished difference. Result has 31 places, 33 transitions, 124 flow [2024-10-31 22:00:12,464 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=124, PETRI_PLACES=31, PETRI_TRANSITIONS=33} [2024-10-31 22:00:12,465 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 5 predicate places. [2024-10-31 22:00:12,465 INFO L471 AbstractCegarLoop]: Abstraction has has 31 places, 33 transitions, 124 flow [2024-10-31 22:00:12,465 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 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 22:00:12,466 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:00:12,466 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:00:12,466 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-31 22:00:12,466 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 22:00:12,470 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:00:12,470 INFO L85 PathProgramCache]: Analyzing trace with hash 1429312728, now seen corresponding path program 2 times [2024-10-31 22:00:12,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:00:12,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854846854] [2024-10-31 22:00:12,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:00:12,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:00:12,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:00:12,667 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 22:00:12,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:00:12,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854846854] [2024-10-31 22:00:12,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854846854] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:00:12,668 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:00:12,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-31 22:00:12,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273288897] [2024-10-31 22:00:12,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:00:12,669 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-31 22:00:12,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:00:12,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-31 22:00:12,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-10-31 22:00:12,686 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 26 [2024-10-31 22:00:12,687 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 33 transitions, 124 flow. Second operand has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:00:12,687 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:00:12,687 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 26 [2024-10-31 22:00:12,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:00:12,949 INFO L124 PetriNetUnfolderBase]: 230/424 cut-off events. [2024-10-31 22:00:12,949 INFO L125 PetriNetUnfolderBase]: For 195/195 co-relation queries the response was YES. [2024-10-31 22:00:12,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1194 conditions, 424 events. 230/424 cut-off events. For 195/195 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 1838 event pairs, 30 based on Foata normal form. 13/435 useless extension candidates. Maximal degree in co-relation 567. Up to 122 conditions per place. [2024-10-31 22:00:12,955 INFO L140 encePairwiseOnDemand]: 19/26 looper letters, 62 selfloop transitions, 12 changer transitions 1/77 dead transitions. [2024-10-31 22:00:12,955 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 77 transitions, 437 flow [2024-10-31 22:00:12,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-31 22:00:12,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-31 22:00:12,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 92 transitions. [2024-10-31 22:00:12,958 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5054945054945055 [2024-10-31 22:00:12,959 INFO L175 Difference]: Start difference. First operand has 31 places, 33 transitions, 124 flow. Second operand 7 states and 92 transitions. [2024-10-31 22:00:12,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 77 transitions, 437 flow [2024-10-31 22:00:12,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 77 transitions, 437 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-31 22:00:12,966 INFO L231 Difference]: Finished difference. Result has 42 places, 39 transitions, 212 flow [2024-10-31 22:00:12,966 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=212, PETRI_PLACES=42, PETRI_TRANSITIONS=39} [2024-10-31 22:00:12,967 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 16 predicate places. [2024-10-31 22:00:12,968 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 39 transitions, 212 flow [2024-10-31 22:00:12,968 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:00:12,968 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:00:12,969 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:00:12,969 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-31 22:00:12,969 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 22:00:12,970 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:00:12,971 INFO L85 PathProgramCache]: Analyzing trace with hash 469608532, now seen corresponding path program 3 times [2024-10-31 22:00:12,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:00:12,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129346443] [2024-10-31 22:00:12,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:00:12,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:00:13,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:00:13,138 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 22:00:13,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:00:13,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129346443] [2024-10-31 22:00:13,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129346443] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:00:13,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:00:13,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-31 22:00:13,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645121369] [2024-10-31 22:00:13,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:00:13,143 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 22:00:13,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:00:13,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 22:00:13,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-31 22:00:13,155 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 26 [2024-10-31 22:00:13,155 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 39 transitions, 212 flow. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 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 22:00:13,155 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:00:13,156 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 26 [2024-10-31 22:00:13,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:00:13,376 INFO L124 PetriNetUnfolderBase]: 292/535 cut-off events. [2024-10-31 22:00:13,376 INFO L125 PetriNetUnfolderBase]: For 857/857 co-relation queries the response was YES. [2024-10-31 22:00:13,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1835 conditions, 535 events. 292/535 cut-off events. For 857/857 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2346 event pairs, 92 based on Foata normal form. 2/529 useless extension candidates. Maximal degree in co-relation 1351. Up to 262 conditions per place. [2024-10-31 22:00:13,381 INFO L140 encePairwiseOnDemand]: 20/26 looper letters, 52 selfloop transitions, 10 changer transitions 4/68 dead transitions. [2024-10-31 22:00:13,381 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 68 transitions, 497 flow [2024-10-31 22:00:13,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 22:00:13,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-31 22:00:13,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 63 transitions. [2024-10-31 22:00:13,385 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4846153846153846 [2024-10-31 22:00:13,385 INFO L175 Difference]: Start difference. First operand has 42 places, 39 transitions, 212 flow. Second operand 5 states and 63 transitions. [2024-10-31 22:00:13,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 68 transitions, 497 flow [2024-10-31 22:00:13,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 68 transitions, 485 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-10-31 22:00:13,395 INFO L231 Difference]: Finished difference. Result has 48 places, 41 transitions, 259 flow [2024-10-31 22:00:13,396 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=205, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=259, PETRI_PLACES=48, PETRI_TRANSITIONS=41} [2024-10-31 22:00:13,397 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 22 predicate places. [2024-10-31 22:00:13,398 INFO L471 AbstractCegarLoop]: Abstraction has has 48 places, 41 transitions, 259 flow [2024-10-31 22:00:13,398 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 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 22:00:13,399 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:00:13,399 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:00:13,399 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-31 22:00:13,399 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 22:00:13,401 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:00:13,401 INFO L85 PathProgramCache]: Analyzing trace with hash 1005547373, now seen corresponding path program 1 times [2024-10-31 22:00:13,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:00:13,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624402589] [2024-10-31 22:00:13,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:00:13,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:00:13,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:00:13,511 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 22:00:13,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:00:13,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624402589] [2024-10-31 22:00:13,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624402589] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:00:13,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:00:13,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-31 22:00:13,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274246342] [2024-10-31 22:00:13,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:00:13,514 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 22:00:13,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:00:13,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 22:00:13,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-31 22:00:13,523 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 26 [2024-10-31 22:00:13,523 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 41 transitions, 259 flow. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 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 22:00:13,524 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:00:13,524 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 26 [2024-10-31 22:00:13,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:00:13,747 INFO L124 PetriNetUnfolderBase]: 305/553 cut-off events. [2024-10-31 22:00:13,747 INFO L125 PetriNetUnfolderBase]: For 1229/1233 co-relation queries the response was YES. [2024-10-31 22:00:13,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2039 conditions, 553 events. 305/553 cut-off events. For 1229/1233 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2519 event pairs, 107 based on Foata normal form. 3/549 useless extension candidates. Maximal degree in co-relation 1783. Up to 290 conditions per place. [2024-10-31 22:00:13,753 INFO L140 encePairwiseOnDemand]: 20/26 looper letters, 52 selfloop transitions, 7 changer transitions 7/69 dead transitions. [2024-10-31 22:00:13,753 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 69 transitions, 533 flow [2024-10-31 22:00:13,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 22:00:13,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-31 22:00:13,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 67 transitions. [2024-10-31 22:00:13,755 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5153846153846153 [2024-10-31 22:00:13,755 INFO L175 Difference]: Start difference. First operand has 48 places, 41 transitions, 259 flow. Second operand 5 states and 67 transitions. [2024-10-31 22:00:13,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 69 transitions, 533 flow [2024-10-31 22:00:13,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 69 transitions, 494 flow, removed 14 selfloop flow, removed 2 redundant places. [2024-10-31 22:00:13,762 INFO L231 Difference]: Finished difference. Result has 51 places, 41 transitions, 261 flow [2024-10-31 22:00:13,762 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=239, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=261, PETRI_PLACES=51, PETRI_TRANSITIONS=41} [2024-10-31 22:00:13,763 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 25 predicate places. [2024-10-31 22:00:13,764 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 41 transitions, 261 flow [2024-10-31 22:00:13,764 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 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 22:00:13,764 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:00:13,764 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:00:13,764 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-31 22:00:13,765 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 22:00:13,765 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:00:13,765 INFO L85 PathProgramCache]: Analyzing trace with hash -710500163, now seen corresponding path program 2 times [2024-10-31 22:00:13,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:00:13,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768679557] [2024-10-31 22:00:13,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:00:13,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:00:13,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:00:13,872 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 22:00:13,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:00:13,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768679557] [2024-10-31 22:00:13,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768679557] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:00:13,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256884105] [2024-10-31 22:00:13,873 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-31 22:00:13,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:00:13,874 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66e4e052-a721-435e-a36d-649c33e2a528/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:00:13,876 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66e4e052-a721-435e-a36d-649c33e2a528/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:00:13,877 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66e4e052-a721-435e-a36d-649c33e2a528/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-31 22:00:13,987 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-31 22:00:13,988 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:00:13,991 INFO L255 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-31 22:00:13,995 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:00:14,057 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 22:00:14,057 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:00:14,098 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 22:00:14,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256884105] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:00:14,099 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:00:14,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2024-10-31 22:00:14,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325193479] [2024-10-31 22:00:14,099 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:00:14,100 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-31 22:00:14,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:00:14,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-31 22:00:14,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-10-31 22:00:14,107 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-10-31 22:00:14,108 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 41 transitions, 261 flow. Second operand has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:00:14,108 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:00:14,108 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-10-31 22:00:14,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:00:14,582 INFO L124 PetriNetUnfolderBase]: 428/738 cut-off events. [2024-10-31 22:00:14,582 INFO L125 PetriNetUnfolderBase]: For 1900/1900 co-relation queries the response was YES. [2024-10-31 22:00:14,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2730 conditions, 738 events. 428/738 cut-off events. For 1900/1900 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 3120 event pairs, 22 based on Foata normal form. 12/748 useless extension candidates. Maximal degree in co-relation 2151. Up to 147 conditions per place. [2024-10-31 22:00:14,590 INFO L140 encePairwiseOnDemand]: 18/26 looper letters, 75 selfloop transitions, 52 changer transitions 2/130 dead transitions. [2024-10-31 22:00:14,590 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 130 transitions, 1038 flow [2024-10-31 22:00:14,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-31 22:00:14,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-10-31 22:00:14,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 135 transitions. [2024-10-31 22:00:14,593 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3708791208791209 [2024-10-31 22:00:14,593 INFO L175 Difference]: Start difference. First operand has 51 places, 41 transitions, 261 flow. Second operand 14 states and 135 transitions. [2024-10-31 22:00:14,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 130 transitions, 1038 flow [2024-10-31 22:00:14,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 130 transitions, 981 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-10-31 22:00:14,604 INFO L231 Difference]: Finished difference. Result has 65 places, 79 transitions, 678 flow [2024-10-31 22:00:14,604 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=245, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=678, PETRI_PLACES=65, PETRI_TRANSITIONS=79} [2024-10-31 22:00:14,607 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 39 predicate places. [2024-10-31 22:00:14,607 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 79 transitions, 678 flow [2024-10-31 22:00:14,607 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:00:14,607 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:00:14,607 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:00:14,629 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66e4e052-a721-435e-a36d-649c33e2a528/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-31 22:00:14,808 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66e4e052-a721-435e-a36d-649c33e2a528/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-10-31 22:00:14,808 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 22:00:14,809 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:00:14,809 INFO L85 PathProgramCache]: Analyzing trace with hash 1226407250, now seen corresponding path program 4 times [2024-10-31 22:00:14,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:00:14,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467627696] [2024-10-31 22:00:14,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:00:14,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:00:14,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:00:14,914 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 22:00:14,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:00:14,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467627696] [2024-10-31 22:00:14,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467627696] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:00:14,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:00:14,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-31 22:00:14,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21339186] [2024-10-31 22:00:14,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:00:14,919 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 22:00:14,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:00:14,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 22:00:14,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-10-31 22:00:14,931 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-10-31 22:00:14,931 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 79 transitions, 678 flow. Second operand has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 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 22:00:14,931 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:00:14,932 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-10-31 22:00:14,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:00:15,148 INFO L124 PetriNetUnfolderBase]: 417/721 cut-off events. [2024-10-31 22:00:15,148 INFO L125 PetriNetUnfolderBase]: For 2403/2403 co-relation queries the response was YES. [2024-10-31 22:00:15,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3007 conditions, 721 events. 417/721 cut-off events. For 2403/2403 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 3054 event pairs, 131 based on Foata normal form. 8/727 useless extension candidates. Maximal degree in co-relation 2651. Up to 433 conditions per place. [2024-10-31 22:00:15,155 INFO L140 encePairwiseOnDemand]: 18/26 looper letters, 77 selfloop transitions, 27 changer transitions 0/105 dead transitions. [2024-10-31 22:00:15,156 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 105 transitions, 1018 flow [2024-10-31 22:00:15,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 22:00:15,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-31 22:00:15,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 64 transitions. [2024-10-31 22:00:15,157 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.49230769230769234 [2024-10-31 22:00:15,157 INFO L175 Difference]: Start difference. First operand has 65 places, 79 transitions, 678 flow. Second operand 5 states and 64 transitions. [2024-10-31 22:00:15,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 105 transitions, 1018 flow [2024-10-31 22:00:15,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 105 transitions, 953 flow, removed 23 selfloop flow, removed 2 redundant places. [2024-10-31 22:00:15,171 INFO L231 Difference]: Finished difference. Result has 67 places, 80 transitions, 682 flow [2024-10-31 22:00:15,172 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=595, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=682, PETRI_PLACES=67, PETRI_TRANSITIONS=80} [2024-10-31 22:00:15,173 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 41 predicate places. [2024-10-31 22:00:15,174 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 80 transitions, 682 flow [2024-10-31 22:00:15,174 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 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 22:00:15,175 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:00:15,175 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:00:15,175 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-10-31 22:00:15,175 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 22:00:15,176 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:00:15,176 INFO L85 PathProgramCache]: Analyzing trace with hash -641270421, now seen corresponding path program 3 times [2024-10-31 22:00:15,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:00:15,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052674573] [2024-10-31 22:00:15,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:00:15,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:00:15,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:00:15,307 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 22:00:15,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:00:15,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052674573] [2024-10-31 22:00:15,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052674573] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:00:15,308 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:00:15,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-31 22:00:15,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899399367] [2024-10-31 22:00:15,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:00:15,308 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-31 22:00:15,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:00:15,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-31 22:00:15,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2024-10-31 22:00:15,318 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-10-31 22:00:15,319 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 80 transitions, 682 flow. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:00:15,319 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:00:15,319 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-10-31 22:00:15,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:00:15,575 INFO L124 PetriNetUnfolderBase]: 429/741 cut-off events. [2024-10-31 22:00:15,575 INFO L125 PetriNetUnfolderBase]: For 2543/2543 co-relation queries the response was YES. [2024-10-31 22:00:15,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3128 conditions, 741 events. 429/741 cut-off events. For 2543/2543 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 3163 event pairs, 132 based on Foata normal form. 8/747 useless extension candidates. Maximal degree in co-relation 2815. Up to 433 conditions per place. [2024-10-31 22:00:15,584 INFO L140 encePairwiseOnDemand]: 19/26 looper letters, 81 selfloop transitions, 34 changer transitions 0/116 dead transitions. [2024-10-31 22:00:15,584 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 116 transitions, 1106 flow [2024-10-31 22:00:15,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-31 22:00:15,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-31 22:00:15,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 73 transitions. [2024-10-31 22:00:15,586 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.46794871794871795 [2024-10-31 22:00:15,586 INFO L175 Difference]: Start difference. First operand has 67 places, 80 transitions, 682 flow. Second operand 6 states and 73 transitions. [2024-10-31 22:00:15,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 116 transitions, 1106 flow [2024-10-31 22:00:15,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 116 transitions, 1034 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-31 22:00:15,601 INFO L231 Difference]: Finished difference. Result has 69 places, 83 transitions, 723 flow [2024-10-31 22:00:15,602 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=613, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=723, PETRI_PLACES=69, PETRI_TRANSITIONS=83} [2024-10-31 22:00:15,603 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 43 predicate places. [2024-10-31 22:00:15,603 INFO L471 AbstractCegarLoop]: Abstraction has has 69 places, 83 transitions, 723 flow [2024-10-31 22:00:15,604 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:00:15,604 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:00:15,604 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:00:15,604 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-10-31 22:00:15,604 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 22:00:15,605 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:00:15,605 INFO L85 PathProgramCache]: Analyzing trace with hash 1589498937, now seen corresponding path program 4 times [2024-10-31 22:00:15,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:00:15,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015425504] [2024-10-31 22:00:15,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:00:15,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:00:15,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:00:15,732 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 22:00:15,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:00:15,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015425504] [2024-10-31 22:00:15,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015425504] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:00:15,733 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:00:15,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-31 22:00:15,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257718239] [2024-10-31 22:00:15,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:00:15,734 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 22:00:15,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:00:15,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 22:00:15,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-31 22:00:15,747 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 26 [2024-10-31 22:00:15,748 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 83 transitions, 723 flow. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 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 22:00:15,748 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:00:15,748 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 26 [2024-10-31 22:00:15,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:00:16,045 INFO L124 PetriNetUnfolderBase]: 383/686 cut-off events. [2024-10-31 22:00:16,045 INFO L125 PetriNetUnfolderBase]: For 2408/2426 co-relation queries the response was YES. [2024-10-31 22:00:16,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2941 conditions, 686 events. 383/686 cut-off events. For 2408/2426 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 3081 event pairs, 113 based on Foata normal form. 3/679 useless extension candidates. Maximal degree in co-relation 2553. Up to 394 conditions per place. [2024-10-31 22:00:16,054 INFO L140 encePairwiseOnDemand]: 19/26 looper letters, 63 selfloop transitions, 23 changer transitions 4/108 dead transitions. [2024-10-31 22:00:16,054 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 108 transitions, 1042 flow [2024-10-31 22:00:16,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 22:00:16,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-31 22:00:16,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 63 transitions. [2024-10-31 22:00:16,055 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4846153846153846 [2024-10-31 22:00:16,055 INFO L175 Difference]: Start difference. First operand has 69 places, 83 transitions, 723 flow. Second operand 5 states and 63 transitions. [2024-10-31 22:00:16,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 108 transitions, 1042 flow [2024-10-31 22:00:16,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 108 transitions, 994 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-31 22:00:16,065 INFO L231 Difference]: Finished difference. Result has 71 places, 82 transitions, 714 flow [2024-10-31 22:00:16,066 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=675, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=714, PETRI_PLACES=71, PETRI_TRANSITIONS=82} [2024-10-31 22:00:16,067 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 45 predicate places. [2024-10-31 22:00:16,067 INFO L471 AbstractCegarLoop]: Abstraction has has 71 places, 82 transitions, 714 flow [2024-10-31 22:00:16,068 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 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 22:00:16,068 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:00:16,068 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:00:16,069 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-10-31 22:00:16,069 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 22:00:16,069 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:00:16,069 INFO L85 PathProgramCache]: Analyzing trace with hash 1656258960, now seen corresponding path program 5 times [2024-10-31 22:00:16,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:00:16,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957930918] [2024-10-31 22:00:16,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:00:16,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:00:16,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:00:16,201 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 22:00:16,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:00:16,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957930918] [2024-10-31 22:00:16,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957930918] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:00:16,201 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:00:16,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-31 22:00:16,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057639229] [2024-10-31 22:00:16,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:00:16,205 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-31 22:00:16,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:00:16,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-31 22:00:16,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-10-31 22:00:16,207 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-10-31 22:00:16,208 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 82 transitions, 714 flow. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:00:16,208 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:00:16,208 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-10-31 22:00:16,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:00:16,536 INFO L124 PetriNetUnfolderBase]: 492/849 cut-off events. [2024-10-31 22:00:16,537 INFO L125 PetriNetUnfolderBase]: For 2706/2706 co-relation queries the response was YES. [2024-10-31 22:00:16,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3606 conditions, 849 events. 492/849 cut-off events. For 2706/2706 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 3784 event pairs, 129 based on Foata normal form. 9/856 useless extension candidates. Maximal degree in co-relation 3116. Up to 439 conditions per place. [2024-10-31 22:00:16,544 INFO L140 encePairwiseOnDemand]: 18/26 looper letters, 90 selfloop transitions, 30 changer transitions 0/121 dead transitions. [2024-10-31 22:00:16,544 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 121 transitions, 1183 flow [2024-10-31 22:00:16,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-31 22:00:16,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-31 22:00:16,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 74 transitions. [2024-10-31 22:00:16,545 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.47435897435897434 [2024-10-31 22:00:16,545 INFO L175 Difference]: Start difference. First operand has 71 places, 82 transitions, 714 flow. Second operand 6 states and 74 transitions. [2024-10-31 22:00:16,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 121 transitions, 1183 flow [2024-10-31 22:00:16,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 121 transitions, 1127 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-10-31 22:00:16,558 INFO L231 Difference]: Finished difference. Result has 72 places, 86 transitions, 779 flow [2024-10-31 22:00:16,558 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=664, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=779, PETRI_PLACES=72, PETRI_TRANSITIONS=86} [2024-10-31 22:00:16,559 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 46 predicate places. [2024-10-31 22:00:16,559 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 86 transitions, 779 flow [2024-10-31 22:00:16,559 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:00:16,559 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:00:16,559 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:00:16,560 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-10-31 22:00:16,560 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 22:00:16,561 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:00:16,561 INFO L85 PathProgramCache]: Analyzing trace with hash -1210490047, now seen corresponding path program 5 times [2024-10-31 22:00:16,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:00:16,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681306932] [2024-10-31 22:00:16,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:00:16,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:00:16,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:00:16,671 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 22:00:16,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:00:16,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681306932] [2024-10-31 22:00:16,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681306932] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:00:16,672 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:00:16,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-31 22:00:16,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55504519] [2024-10-31 22:00:16,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:00:16,673 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 22:00:16,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:00:16,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 22:00:16,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-10-31 22:00:16,685 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 26 [2024-10-31 22:00:16,686 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 86 transitions, 779 flow. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 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 22:00:16,686 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:00:16,686 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 26 [2024-10-31 22:00:16,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:00:16,939 INFO L124 PetriNetUnfolderBase]: 433/779 cut-off events. [2024-10-31 22:00:16,940 INFO L125 PetriNetUnfolderBase]: For 3021/3045 co-relation queries the response was YES. [2024-10-31 22:00:16,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3340 conditions, 779 events. 433/779 cut-off events. For 3021/3045 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 3641 event pairs, 137 based on Foata normal form. 3/773 useless extension candidates. Maximal degree in co-relation 2867. Up to 412 conditions per place. [2024-10-31 22:00:16,946 INFO L140 encePairwiseOnDemand]: 19/26 looper letters, 60 selfloop transitions, 30 changer transitions 1/109 dead transitions. [2024-10-31 22:00:16,947 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 109 transitions, 1116 flow [2024-10-31 22:00:16,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 22:00:16,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-31 22:00:16,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 65 transitions. [2024-10-31 22:00:16,948 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-10-31 22:00:16,948 INFO L175 Difference]: Start difference. First operand has 72 places, 86 transitions, 779 flow. Second operand 5 states and 65 transitions. [2024-10-31 22:00:16,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 109 transitions, 1116 flow [2024-10-31 22:00:16,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 109 transitions, 1057 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-10-31 22:00:16,958 INFO L231 Difference]: Finished difference. Result has 74 places, 92 transitions, 876 flow [2024-10-31 22:00:16,958 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=722, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=876, PETRI_PLACES=74, PETRI_TRANSITIONS=92} [2024-10-31 22:00:16,959 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 48 predicate places. [2024-10-31 22:00:16,959 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 92 transitions, 876 flow [2024-10-31 22:00:16,959 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 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 22:00:16,959 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:00:16,959 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:00:16,960 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-10-31 22:00:16,960 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 22:00:16,960 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:00:16,961 INFO L85 PathProgramCache]: Analyzing trace with hash -111148459, now seen corresponding path program 6 times [2024-10-31 22:00:16,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:00:16,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397228093] [2024-10-31 22:00:16,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:00:16,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:00:16,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:00:17,107 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 22:00:17,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:00:17,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397228093] [2024-10-31 22:00:17,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397228093] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:00:17,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:00:17,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-31 22:00:17,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668985959] [2024-10-31 22:00:17,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:00:17,109 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-31 22:00:17,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:00:17,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-31 22:00:17,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-10-31 22:00:17,120 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-10-31 22:00:17,121 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 92 transitions, 876 flow. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:00:17,121 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:00:17,121 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-10-31 22:00:17,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:00:17,405 INFO L124 PetriNetUnfolderBase]: 506/874 cut-off events. [2024-10-31 22:00:17,405 INFO L125 PetriNetUnfolderBase]: For 3156/3156 co-relation queries the response was YES. [2024-10-31 22:00:17,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3703 conditions, 874 events. 506/874 cut-off events. For 3156/3156 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 3922 event pairs, 140 based on Foata normal form. 16/888 useless extension candidates. Maximal degree in co-relation 3445. Up to 411 conditions per place. [2024-10-31 22:00:17,413 INFO L140 encePairwiseOnDemand]: 18/26 looper letters, 80 selfloop transitions, 35 changer transitions 2/118 dead transitions. [2024-10-31 22:00:17,413 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 118 transitions, 1232 flow [2024-10-31 22:00:17,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-31 22:00:17,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-31 22:00:17,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 76 transitions. [2024-10-31 22:00:17,415 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.48717948717948717 [2024-10-31 22:00:17,415 INFO L175 Difference]: Start difference. First operand has 74 places, 92 transitions, 876 flow. Second operand 6 states and 76 transitions. [2024-10-31 22:00:17,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 118 transitions, 1232 flow [2024-10-31 22:00:17,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 118 transitions, 1185 flow, removed 12 selfloop flow, removed 1 redundant places. [2024-10-31 22:00:17,430 INFO L231 Difference]: Finished difference. Result has 80 places, 94 transitions, 921 flow [2024-10-31 22:00:17,430 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=799, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=921, PETRI_PLACES=80, PETRI_TRANSITIONS=94} [2024-10-31 22:00:17,430 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 54 predicate places. [2024-10-31 22:00:17,430 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 94 transitions, 921 flow [2024-10-31 22:00:17,431 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:00:17,431 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:00:17,431 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:00:17,431 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-10-31 22:00:17,431 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 22:00:17,434 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:00:17,434 INFO L85 PathProgramCache]: Analyzing trace with hash 2077923714, now seen corresponding path program 6 times [2024-10-31 22:00:17,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:00:17,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535670372] [2024-10-31 22:00:17,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:00:17,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:00:17,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:00:17,523 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 22:00:17,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:00:17,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535670372] [2024-10-31 22:00:17,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535670372] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:00:17,524 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:00:17,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-31 22:00:17,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077401952] [2024-10-31 22:00:17,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:00:17,525 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 22:00:17,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:00:17,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 22:00:17,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-31 22:00:17,535 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 26 [2024-10-31 22:00:17,535 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 94 transitions, 921 flow. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 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 22:00:17,536 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:00:17,536 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 26 [2024-10-31 22:00:17,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:00:17,782 INFO L124 PetriNetUnfolderBase]: 416/749 cut-off events. [2024-10-31 22:00:17,782 INFO L125 PetriNetUnfolderBase]: For 2955/2967 co-relation queries the response was YES. [2024-10-31 22:00:17,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3213 conditions, 749 events. 416/749 cut-off events. For 2955/2967 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 3510 event pairs, 128 based on Foata normal form. 2/743 useless extension candidates. Maximal degree in co-relation 3056. Up to 399 conditions per place. [2024-10-31 22:00:17,790 INFO L140 encePairwiseOnDemand]: 20/26 looper letters, 70 selfloop transitions, 27 changer transitions 2/106 dead transitions. [2024-10-31 22:00:17,790 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 106 transitions, 1160 flow [2024-10-31 22:00:17,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 22:00:17,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-31 22:00:17,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 60 transitions. [2024-10-31 22:00:17,791 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.46153846153846156 [2024-10-31 22:00:17,791 INFO L175 Difference]: Start difference. First operand has 80 places, 94 transitions, 921 flow. Second operand 5 states and 60 transitions. [2024-10-31 22:00:17,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 106 transitions, 1160 flow [2024-10-31 22:00:17,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 106 transitions, 1067 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-10-31 22:00:17,825 INFO L231 Difference]: Finished difference. Result has 74 places, 93 transitions, 874 flow [2024-10-31 22:00:17,825 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=828, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=874, PETRI_PLACES=74, PETRI_TRANSITIONS=93} [2024-10-31 22:00:17,826 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 48 predicate places. [2024-10-31 22:00:17,826 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 93 transitions, 874 flow [2024-10-31 22:00:17,826 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 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 22:00:17,826 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:00:17,827 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:00:17,827 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-10-31 22:00:17,827 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 22:00:17,827 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:00:17,827 INFO L85 PathProgramCache]: Analyzing trace with hash 201793112, now seen corresponding path program 7 times [2024-10-31 22:00:17,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:00:17,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330142645] [2024-10-31 22:00:17,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:00:17,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:00:17,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:00:17,935 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 22:00:17,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:00:17,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330142645] [2024-10-31 22:00:17,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330142645] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:00:17,935 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:00:17,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-31 22:00:17,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698787913] [2024-10-31 22:00:17,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:00:17,936 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-31 22:00:17,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:00:17,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-31 22:00:17,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2024-10-31 22:00:17,941 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-10-31 22:00:17,942 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 93 transitions, 874 flow. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:00:17,942 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:00:17,942 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-10-31 22:00:17,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:00:18,205 INFO L124 PetriNetUnfolderBase]: 483/821 cut-off events. [2024-10-31 22:00:18,206 INFO L125 PetriNetUnfolderBase]: For 2944/2944 co-relation queries the response was YES. [2024-10-31 22:00:18,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3409 conditions, 821 events. 483/821 cut-off events. For 2944/2944 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 3565 event pairs, 145 based on Foata normal form. 9/828 useless extension candidates. Maximal degree in co-relation 2844. Up to 457 conditions per place. [2024-10-31 22:00:18,213 INFO L140 encePairwiseOnDemand]: 19/26 looper letters, 81 selfloop transitions, 31 changer transitions 1/114 dead transitions. [2024-10-31 22:00:18,214 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 114 transitions, 1180 flow [2024-10-31 22:00:18,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-31 22:00:18,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-31 22:00:18,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 70 transitions. [2024-10-31 22:00:18,215 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.44871794871794873 [2024-10-31 22:00:18,215 INFO L175 Difference]: Start difference. First operand has 74 places, 93 transitions, 874 flow. Second operand 6 states and 70 transitions. [2024-10-31 22:00:18,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 114 transitions, 1180 flow [2024-10-31 22:00:18,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 114 transitions, 1126 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-10-31 22:00:18,226 INFO L231 Difference]: Finished difference. Result has 75 places, 93 transitions, 880 flow [2024-10-31 22:00:18,226 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=803, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=880, PETRI_PLACES=75, PETRI_TRANSITIONS=93} [2024-10-31 22:00:18,227 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 49 predicate places. [2024-10-31 22:00:18,227 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 93 transitions, 880 flow [2024-10-31 22:00:18,227 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:00:18,228 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:00:18,228 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:00:18,228 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-10-31 22:00:18,228 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 22:00:18,228 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:00:18,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1913229141, now seen corresponding path program 1 times [2024-10-31 22:00:18,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:00:18,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757292925] [2024-10-31 22:00:18,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:00:18,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:00:18,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:00:18,344 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:00:18,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:00:18,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757292925] [2024-10-31 22:00:18,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757292925] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:00:18,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:00:18,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-31 22:00:18,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957259667] [2024-10-31 22:00:18,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:00:18,346 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 22:00:18,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:00:18,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 22:00:18,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:00:18,347 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 26 [2024-10-31 22:00:18,347 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 93 transitions, 880 flow. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:00:18,347 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:00:18,348 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 26 [2024-10-31 22:00:18,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:00:18,598 INFO L124 PetriNetUnfolderBase]: 365/717 cut-off events. [2024-10-31 22:00:18,598 INFO L125 PetriNetUnfolderBase]: For 3103/3133 co-relation queries the response was YES. [2024-10-31 22:00:18,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3029 conditions, 717 events. 365/717 cut-off events. For 3103/3133 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 3595 event pairs, 162 based on Foata normal form. 25/732 useless extension candidates. Maximal degree in co-relation 2559. Up to 558 conditions per place. [2024-10-31 22:00:18,607 INFO L140 encePairwiseOnDemand]: 19/26 looper letters, 66 selfloop transitions, 2 changer transitions 15/109 dead transitions. [2024-10-31 22:00:18,607 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 109 transitions, 1160 flow [2024-10-31 22:00:18,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 22:00:18,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-31 22:00:18,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 59 transitions. [2024-10-31 22:00:18,609 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45384615384615384 [2024-10-31 22:00:18,609 INFO L175 Difference]: Start difference. First operand has 75 places, 93 transitions, 880 flow. Second operand 5 states and 59 transitions. [2024-10-31 22:00:18,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 109 transitions, 1160 flow [2024-10-31 22:00:18,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 109 transitions, 1090 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-10-31 22:00:18,635 INFO L231 Difference]: Finished difference. Result has 77 places, 94 transitions, 841 flow [2024-10-31 22:00:18,635 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=821, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=841, PETRI_PLACES=77, PETRI_TRANSITIONS=94} [2024-10-31 22:00:18,636 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 51 predicate places. [2024-10-31 22:00:18,636 INFO L471 AbstractCegarLoop]: Abstraction has has 77 places, 94 transitions, 841 flow [2024-10-31 22:00:18,636 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:00:18,636 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:00:18,637 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:00:18,637 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-10-31 22:00:18,638 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 22:00:18,638 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:00:18,638 INFO L85 PathProgramCache]: Analyzing trace with hash -447768941, now seen corresponding path program 1 times [2024-10-31 22:00:18,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:00:18,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713111208] [2024-10-31 22:00:18,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:00:18,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:00:18,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:00:18,866 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:00:18,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:00:18,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713111208] [2024-10-31 22:00:18,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713111208] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:00:18,866 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:00:18,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-31 22:00:18,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111084189] [2024-10-31 22:00:18,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:00:18,867 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 22:00:18,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:00:18,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 22:00:18,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:00:18,868 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 26 [2024-10-31 22:00:18,868 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 94 transitions, 841 flow. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:00:18,868 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:00:18,868 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 26 [2024-10-31 22:00:18,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:00:19,056 INFO L124 PetriNetUnfolderBase]: 363/714 cut-off events. [2024-10-31 22:00:19,056 INFO L125 PetriNetUnfolderBase]: For 2596/2638 co-relation queries the response was YES. [2024-10-31 22:00:19,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2929 conditions, 714 events. 363/714 cut-off events. For 2596/2638 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 3571 event pairs, 162 based on Foata normal form. 25/731 useless extension candidates. Maximal degree in co-relation 2897. Up to 559 conditions per place. [2024-10-31 22:00:19,064 INFO L140 encePairwiseOnDemand]: 21/26 looper letters, 67 selfloop transitions, 2 changer transitions 11/106 dead transitions. [2024-10-31 22:00:19,064 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 106 transitions, 1100 flow [2024-10-31 22:00:19,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 22:00:19,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-31 22:00:19,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 50 transitions. [2024-10-31 22:00:19,065 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4807692307692308 [2024-10-31 22:00:19,065 INFO L175 Difference]: Start difference. First operand has 77 places, 94 transitions, 841 flow. Second operand 4 states and 50 transitions. [2024-10-31 22:00:19,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 106 transitions, 1100 flow [2024-10-31 22:00:19,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 106 transitions, 1084 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-10-31 22:00:19,077 INFO L231 Difference]: Finished difference. Result has 77 places, 95 transitions, 845 flow [2024-10-31 22:00:19,077 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=829, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=845, PETRI_PLACES=77, PETRI_TRANSITIONS=95} [2024-10-31 22:00:19,078 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 51 predicate places. [2024-10-31 22:00:19,078 INFO L471 AbstractCegarLoop]: Abstraction has has 77 places, 95 transitions, 845 flow [2024-10-31 22:00:19,078 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:00:19,079 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:00:19,079 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:00:19,079 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-10-31 22:00:19,079 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 22:00:19,080 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:00:19,080 INFO L85 PathProgramCache]: Analyzing trace with hash -2092765735, now seen corresponding path program 1 times [2024-10-31 22:00:19,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:00:19,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533123786] [2024-10-31 22:00:19,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:00:19,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:00:19,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:00:19,410 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:00:19,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:00:19,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533123786] [2024-10-31 22:00:19,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533123786] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:00:19,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143480649] [2024-10-31 22:00:19,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:00:19,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:00:19,411 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66e4e052-a721-435e-a36d-649c33e2a528/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:00:19,413 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66e4e052-a721-435e-a36d-649c33e2a528/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:00:19,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66e4e052-a721-435e-a36d-649c33e2a528/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-31 22:00:19,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:00:19,516 INFO L255 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-10-31 22:00:19,518 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:00:19,614 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:00:19,614 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:00:19,671 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 12 [2024-10-31 22:00:19,740 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:00:19,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143480649] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:00:19,741 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:00:19,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2024-10-31 22:00:19,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464514727] [2024-10-31 22:00:19,741 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:00:19,742 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-31 22:00:19,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:00:19,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-31 22:00:19,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-10-31 22:00:19,743 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 26 [2024-10-31 22:00:19,743 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 95 transitions, 845 flow. Second operand has 11 states, 11 states have (on average 8.0) internal successors, (88), 11 states have internal predecessors, (88), 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 22:00:19,743 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:00:19,744 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 26 [2024-10-31 22:00:19,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:00:20,340 INFO L124 PetriNetUnfolderBase]: 1072/1996 cut-off events. [2024-10-31 22:00:20,340 INFO L125 PetriNetUnfolderBase]: For 6743/6893 co-relation queries the response was YES. [2024-10-31 22:00:20,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7923 conditions, 1996 events. 1072/1996 cut-off events. For 6743/6893 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 12018 event pairs, 143 based on Foata normal form. 54/2044 useless extension candidates. Maximal degree in co-relation 6496. Up to 521 conditions per place. [2024-10-31 22:00:20,369 INFO L140 encePairwiseOnDemand]: 19/26 looper letters, 225 selfloop transitions, 14 changer transitions 4/269 dead transitions. [2024-10-31 22:00:20,371 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 269 transitions, 2858 flow [2024-10-31 22:00:20,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-31 22:00:20,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-10-31 22:00:20,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 125 transitions. [2024-10-31 22:00:20,372 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5341880341880342 [2024-10-31 22:00:20,372 INFO L175 Difference]: Start difference. First operand has 77 places, 95 transitions, 845 flow. Second operand 9 states and 125 transitions. [2024-10-31 22:00:20,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 269 transitions, 2858 flow [2024-10-31 22:00:20,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 269 transitions, 2842 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-10-31 22:00:20,403 INFO L231 Difference]: Finished difference. Result has 86 places, 108 transitions, 954 flow [2024-10-31 22:00:20,403 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=837, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=954, PETRI_PLACES=86, PETRI_TRANSITIONS=108} [2024-10-31 22:00:20,404 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 60 predicate places. [2024-10-31 22:00:20,404 INFO L471 AbstractCegarLoop]: Abstraction has has 86 places, 108 transitions, 954 flow [2024-10-31 22:00:20,404 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.0) internal successors, (88), 11 states have internal predecessors, (88), 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 22:00:20,404 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:00:20,404 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:00:20,451 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66e4e052-a721-435e-a36d-649c33e2a528/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-10-31 22:00:20,605 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66e4e052-a721-435e-a36d-649c33e2a528/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-10-31 22:00:20,606 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 22:00:20,606 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:00:20,609 INFO L85 PathProgramCache]: Analyzing trace with hash -1625193775, now seen corresponding path program 2 times [2024-10-31 22:00:20,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:00:20,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552987160] [2024-10-31 22:00:20,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:00:20,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:00:20,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:00:20,986 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:00:20,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:00:20,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552987160] [2024-10-31 22:00:20,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552987160] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:00:20,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098473104] [2024-10-31 22:00:20,987 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-31 22:00:20,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:00:20,988 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66e4e052-a721-435e-a36d-649c33e2a528/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:00:20,992 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66e4e052-a721-435e-a36d-649c33e2a528/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:00:21,000 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66e4e052-a721-435e-a36d-649c33e2a528/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-31 22:00:21,175 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-31 22:00:21,176 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:00:21,178 INFO L255 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-10-31 22:00:21,180 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:00:21,267 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:00:21,267 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:00:21,297 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 12 [2024-10-31 22:00:21,371 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:00:21,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098473104] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:00:21,371 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:00:21,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 11 [2024-10-31 22:00:21,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186769876] [2024-10-31 22:00:21,372 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:00:21,372 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-31 22:00:21,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:00:21,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-31 22:00:21,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-10-31 22:00:21,373 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 26 [2024-10-31 22:00:21,374 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 108 transitions, 954 flow. Second operand has 11 states, 11 states have (on average 7.545454545454546) internal successors, (83), 11 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:00:21,374 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:00:21,374 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 26 [2024-10-31 22:00:21,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:00:22,563 INFO L124 PetriNetUnfolderBase]: 2651/4950 cut-off events. [2024-10-31 22:00:22,564 INFO L125 PetriNetUnfolderBase]: For 18161/18453 co-relation queries the response was YES. [2024-10-31 22:00:22,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20662 conditions, 4950 events. 2651/4950 cut-off events. For 18161/18453 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 35324 event pairs, 405 based on Foata normal form. 167/5109 useless extension candidates. Maximal degree in co-relation 15779. Up to 1606 conditions per place. [2024-10-31 22:00:22,620 INFO L140 encePairwiseOnDemand]: 19/26 looper letters, 224 selfloop transitions, 23 changer transitions 18/291 dead transitions. [2024-10-31 22:00:22,621 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 291 transitions, 3114 flow [2024-10-31 22:00:22,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-31 22:00:22,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-31 22:00:22,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 114 transitions. [2024-10-31 22:00:22,623 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5480769230769231 [2024-10-31 22:00:22,623 INFO L175 Difference]: Start difference. First operand has 86 places, 108 transitions, 954 flow. Second operand 8 states and 114 transitions. [2024-10-31 22:00:22,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 291 transitions, 3114 flow [2024-10-31 22:00:22,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 291 transitions, 3066 flow, removed 23 selfloop flow, removed 1 redundant places. [2024-10-31 22:00:22,692 INFO L231 Difference]: Finished difference. Result has 97 places, 126 transitions, 1142 flow [2024-10-31 22:00:22,692 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=934, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1142, PETRI_PLACES=97, PETRI_TRANSITIONS=126} [2024-10-31 22:00:22,693 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 71 predicate places. [2024-10-31 22:00:22,693 INFO L471 AbstractCegarLoop]: Abstraction has has 97 places, 126 transitions, 1142 flow [2024-10-31 22:00:22,693 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.545454545454546) internal successors, (83), 11 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:00:22,693 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:00:22,694 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:00:22,715 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66e4e052-a721-435e-a36d-649c33e2a528/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-31 22:00:22,894 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66e4e052-a721-435e-a36d-649c33e2a528/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-10-31 22:00:22,895 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 22:00:22,895 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:00:22,895 INFO L85 PathProgramCache]: Analyzing trace with hash -1808361791, now seen corresponding path program 3 times [2024-10-31 22:00:22,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:00:22,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157994852] [2024-10-31 22:00:22,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:00:22,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:00:22,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:00:23,060 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-31 22:00:23,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:00:23,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157994852] [2024-10-31 22:00:23,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157994852] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:00:23,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460118750] [2024-10-31 22:00:23,061 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-31 22:00:23,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:00:23,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66e4e052-a721-435e-a36d-649c33e2a528/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:00:23,065 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66e4e052-a721-435e-a36d-649c33e2a528/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:00:23,066 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66e4e052-a721-435e-a36d-649c33e2a528/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-31 22:00:23,187 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-31 22:00:23,188 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:00:23,189 INFO L255 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-31 22:00:23,191 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:00:23,300 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-31 22:00:23,301 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:00:23,378 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-31 22:00:23,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1460118750] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:00:23,378 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:00:23,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-10-31 22:00:23,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051045158] [2024-10-31 22:00:23,379 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:00:23,380 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-31 22:00:23,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:00:23,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-31 22:00:23,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2024-10-31 22:00:23,396 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-10-31 22:00:23,396 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 126 transitions, 1142 flow. Second operand has 15 states, 15 states have (on average 6.466666666666667) internal successors, (97), 15 states have internal predecessors, (97), 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 22:00:23,396 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:00:23,396 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-10-31 22:00:23,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:00:25,739 INFO L124 PetriNetUnfolderBase]: 4834/8047 cut-off events. [2024-10-31 22:00:25,739 INFO L125 PetriNetUnfolderBase]: For 23630/23630 co-relation queries the response was YES. [2024-10-31 22:00:25,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33461 conditions, 8047 events. 4834/8047 cut-off events. For 23630/23630 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 52076 event pairs, 183 based on Foata normal form. 240/8287 useless extension candidates. Maximal degree in co-relation 28087. Up to 1475 conditions per place. [2024-10-31 22:00:25,800 INFO L140 encePairwiseOnDemand]: 18/26 looper letters, 373 selfloop transitions, 123 changer transitions 8/505 dead transitions. [2024-10-31 22:00:25,800 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 505 transitions, 4865 flow [2024-10-31 22:00:25,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-10-31 22:00:25,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2024-10-31 22:00:25,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 287 transitions. [2024-10-31 22:00:25,803 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3806366047745358 [2024-10-31 22:00:25,803 INFO L175 Difference]: Start difference. First operand has 97 places, 126 transitions, 1142 flow. Second operand 29 states and 287 transitions. [2024-10-31 22:00:25,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 505 transitions, 4865 flow [2024-10-31 22:00:25,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 505 transitions, 4814 flow, removed 24 selfloop flow, removed 1 redundant places. [2024-10-31 22:00:25,897 INFO L231 Difference]: Finished difference. Result has 144 places, 204 transitions, 2209 flow [2024-10-31 22:00:25,897 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=1127, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=2209, PETRI_PLACES=144, PETRI_TRANSITIONS=204} [2024-10-31 22:00:25,898 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 118 predicate places. [2024-10-31 22:00:25,898 INFO L471 AbstractCegarLoop]: Abstraction has has 144 places, 204 transitions, 2209 flow [2024-10-31 22:00:25,898 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.466666666666667) internal successors, (97), 15 states have internal predecessors, (97), 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 22:00:25,899 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:00:25,899 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:00:25,920 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66e4e052-a721-435e-a36d-649c33e2a528/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-10-31 22:00:26,103 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66e4e052-a721-435e-a36d-649c33e2a528/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:00:26,108 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 22:00:26,108 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:00:26,108 INFO L85 PathProgramCache]: Analyzing trace with hash 1935508487, now seen corresponding path program 4 times [2024-10-31 22:00:26,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:00:26,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107015261] [2024-10-31 22:00:26,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:00:26,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:00:26,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:00:26,348 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-31 22:00:26,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:00:26,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107015261] [2024-10-31 22:00:26,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107015261] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:00:26,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471953358] [2024-10-31 22:00:26,350 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-31 22:00:26,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:00:26,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66e4e052-a721-435e-a36d-649c33e2a528/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:00:26,352 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66e4e052-a721-435e-a36d-649c33e2a528/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:00:26,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66e4e052-a721-435e-a36d-649c33e2a528/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-31 22:00:26,454 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-31 22:00:26,454 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:00:26,456 INFO L255 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-31 22:00:26,457 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:00:26,547 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-31 22:00:26,547 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:00:26,641 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-31 22:00:26,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471953358] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:00:26,642 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:00:26,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2024-10-31 22:00:26,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697074929] [2024-10-31 22:00:26,642 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:00:26,642 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-31 22:00:26,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:00:26,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-31 22:00:26,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-10-31 22:00:26,652 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-10-31 22:00:26,652 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 204 transitions, 2209 flow. Second operand has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 11 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:00:26,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:00:26,652 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-10-31 22:00:26,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:00:29,448 INFO L124 PetriNetUnfolderBase]: 6736/11196 cut-off events. [2024-10-31 22:00:29,448 INFO L125 PetriNetUnfolderBase]: For 73665/73665 co-relation queries the response was YES. [2024-10-31 22:00:29,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58582 conditions, 11196 events. 6736/11196 cut-off events. For 73665/73665 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 75443 event pairs, 336 based on Foata normal form. 81/11277 useless extension candidates. Maximal degree in co-relation 56948. Up to 2360 conditions per place. [2024-10-31 22:00:29,560 INFO L140 encePairwiseOnDemand]: 18/26 looper letters, 270 selfloop transitions, 178 changer transitions 9/458 dead transitions. [2024-10-31 22:00:29,560 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 458 transitions, 5315 flow [2024-10-31 22:00:29,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-10-31 22:00:29,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-10-31 22:00:29,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 152 transitions. [2024-10-31 22:00:29,561 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.38974358974358975 [2024-10-31 22:00:29,562 INFO L175 Difference]: Start difference. First operand has 144 places, 204 transitions, 2209 flow. Second operand 15 states and 152 transitions. [2024-10-31 22:00:29,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 458 transitions, 5315 flow [2024-10-31 22:00:30,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 458 transitions, 5035 flow, removed 125 selfloop flow, removed 4 redundant places. [2024-10-31 22:00:30,393 INFO L231 Difference]: Finished difference. Result has 161 places, 284 transitions, 3400 flow [2024-10-31 22:00:30,393 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=2055, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=3400, PETRI_PLACES=161, PETRI_TRANSITIONS=284} [2024-10-31 22:00:30,394 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 135 predicate places. [2024-10-31 22:00:30,394 INFO L471 AbstractCegarLoop]: Abstraction has has 161 places, 284 transitions, 3400 flow [2024-10-31 22:00:30,394 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 11 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:00:30,394 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:00:30,394 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:00:30,418 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66e4e052-a721-435e-a36d-649c33e2a528/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-31 22:00:30,595 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66e4e052-a721-435e-a36d-649c33e2a528/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:00:30,596 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 22:00:30,597 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:00:30,597 INFO L85 PathProgramCache]: Analyzing trace with hash -1473023666, now seen corresponding path program 5 times [2024-10-31 22:00:30,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:00:30,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952869035] [2024-10-31 22:00:30,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:00:30,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:00:30,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:00:30,799 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-31 22:00:30,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:00:30,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952869035] [2024-10-31 22:00:30,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952869035] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:00:30,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510433637] [2024-10-31 22:00:30,800 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-31 22:00:30,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:00:30,800 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66e4e052-a721-435e-a36d-649c33e2a528/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:00:30,802 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66e4e052-a721-435e-a36d-649c33e2a528/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:00:30,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66e4e052-a721-435e-a36d-649c33e2a528/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-31 22:00:30,964 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-10-31 22:00:30,964 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:00:30,967 INFO L255 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-31 22:00:30,970 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:00:31,034 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-31 22:00:31,035 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:00:31,088 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-31 22:00:31,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510433637] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:00:31,089 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:00:31,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2024-10-31 22:00:31,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58721841] [2024-10-31 22:00:31,089 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:00:31,090 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-31 22:00:31,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:00:31,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-31 22:00:31,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-10-31 22:00:31,097 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-10-31 22:00:31,097 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 284 transitions, 3400 flow. Second operand has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 11 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:00:31,097 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:00:31,098 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-10-31 22:00:31,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:00:34,221 INFO L124 PetriNetUnfolderBase]: 7479/12457 cut-off events. [2024-10-31 22:00:34,221 INFO L125 PetriNetUnfolderBase]: For 111224/111224 co-relation queries the response was YES. [2024-10-31 22:00:34,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70728 conditions, 12457 events. 7479/12457 cut-off events. For 111224/111224 co-relation queries the response was YES. Maximal size of possible extension queue 545. Compared 85664 event pairs, 1940 based on Foata normal form. 9/12466 useless extension candidates. Maximal degree in co-relation 68873. Up to 7773 conditions per place. [2024-10-31 22:00:34,361 INFO L140 encePairwiseOnDemand]: 19/26 looper letters, 335 selfloop transitions, 45 changer transitions 17/398 dead transitions. [2024-10-31 22:00:34,362 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 398 transitions, 5262 flow [2024-10-31 22:00:34,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-31 22:00:34,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-31 22:00:34,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 86 transitions. [2024-10-31 22:00:34,363 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4725274725274725 [2024-10-31 22:00:34,363 INFO L175 Difference]: Start difference. First operand has 161 places, 284 transitions, 3400 flow. Second operand 7 states and 86 transitions. [2024-10-31 22:00:34,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 398 transitions, 5262 flow [2024-10-31 22:00:35,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 398 transitions, 5160 flow, removed 51 selfloop flow, removed 0 redundant places. [2024-10-31 22:00:35,754 INFO L231 Difference]: Finished difference. Result has 170 places, 293 transitions, 3531 flow [2024-10-31 22:00:35,755 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=3306, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3531, PETRI_PLACES=170, PETRI_TRANSITIONS=293} [2024-10-31 22:00:35,755 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 144 predicate places. [2024-10-31 22:00:35,755 INFO L471 AbstractCegarLoop]: Abstraction has has 170 places, 293 transitions, 3531 flow [2024-10-31 22:00:35,756 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 11 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:00:35,756 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:00:35,756 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:00:35,770 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66e4e052-a721-435e-a36d-649c33e2a528/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-10-31 22:00:35,956 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66e4e052-a721-435e-a36d-649c33e2a528/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-10-31 22:00:35,957 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 22:00:35,958 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:00:35,958 INFO L85 PathProgramCache]: Analyzing trace with hash 1388022526, now seen corresponding path program 6 times [2024-10-31 22:00:35,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:00:35,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720534793] [2024-10-31 22:00:35,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:00:35,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:00:35,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:00:36,101 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-31 22:00:36,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:00:36,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720534793] [2024-10-31 22:00:36,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720534793] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:00:36,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91354174] [2024-10-31 22:00:36,102 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-31 22:00:36,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:00:36,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66e4e052-a721-435e-a36d-649c33e2a528/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:00:36,105 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66e4e052-a721-435e-a36d-649c33e2a528/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:00:36,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66e4e052-a721-435e-a36d-649c33e2a528/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-31 22:00:36,221 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-10-31 22:00:36,221 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:00:36,223 INFO L255 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-31 22:00:36,224 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:00:36,309 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-31 22:00:36,311 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:00:36,372 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-31 22:00:36,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91354174] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:00:36,373 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:00:36,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2024-10-31 22:00:36,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986892057] [2024-10-31 22:00:36,374 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:00:36,374 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-31 22:00:36,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:00:36,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-31 22:00:36,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2024-10-31 22:00:36,380 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-10-31 22:00:36,380 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 293 transitions, 3531 flow. Second operand has 12 states, 12 states have (on average 6.5) internal successors, (78), 12 states have internal predecessors, (78), 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 22:00:36,380 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:00:36,380 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-10-31 22:00:36,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand