./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-ext/31_simple_loop5_vs.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc 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_5c4bf477-3dfc-4398-a6e3-dcf5ebd05fca/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4bf477-3dfc-4398-a6e3-dcf5ebd05fca/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4bf477-3dfc-4398-a6e3-dcf5ebd05fca/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4bf477-3dfc-4398-a6e3-dcf5ebd05fca/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread-ext/31_simple_loop5_vs.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4bf477-3dfc-4398-a6e3-dcf5ebd05fca/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4bf477-3dfc-4398-a6e3-dcf5ebd05fca/bin/uautomizer-verify-BQ2R08f2Ya --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 3ace826ce717f8420bd44e3ebb10a0f5689c8f1d5dcaf8399a3f9b8d8dda146f --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-28 23:45:18,888 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-28 23:45:18,951 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4bf477-3dfc-4398-a6e3-dcf5ebd05fca/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-28 23:45:18,955 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-28 23:45:18,956 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-28 23:45:18,978 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-28 23:45:18,979 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-28 23:45:18,979 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-28 23:45:18,980 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-28 23:45:18,980 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-28 23:45:18,981 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-28 23:45:18,981 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-28 23:45:18,982 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-28 23:45:18,983 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-28 23:45:18,983 INFO L153 SettingsManager]: * Use SBE=true [2023-11-28 23:45:18,984 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-28 23:45:18,984 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-28 23:45:18,985 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-28 23:45:18,985 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-28 23:45:18,986 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-28 23:45:18,986 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-28 23:45:18,986 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-28 23:45:18,987 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-28 23:45:18,987 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-28 23:45:18,988 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-28 23:45:18,988 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-28 23:45:18,988 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-28 23:45:18,989 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-28 23:45:18,989 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-28 23:45:18,989 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-28 23:45:18,990 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-28 23:45:18,990 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-28 23:45:18,990 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-28 23:45:18,991 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-28 23:45:18,991 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-28 23:45:18,991 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-28 23:45:18,991 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-28 23:45:18,991 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-28 23:45:18,992 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-28 23:45:18,992 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-28 23:45:18,992 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-28 23:45:18,992 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-28 23:45:18,993 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_5c4bf477-3dfc-4398-a6e3-dcf5ebd05fca/bin/uautomizer-verify-BQ2R08f2Ya/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4bf477-3dfc-4398-a6e3-dcf5ebd05fca/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3ace826ce717f8420bd44e3ebb10a0f5689c8f1d5dcaf8399a3f9b8d8dda146f [2023-11-28 23:45:19,230 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-28 23:45:19,259 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-28 23:45:19,262 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-28 23:45:19,263 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-28 23:45:19,263 INFO L274 PluginConnector]: CDTParser initialized [2023-11-28 23:45:19,264 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4bf477-3dfc-4398-a6e3-dcf5ebd05fca/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/pthread-ext/31_simple_loop5_vs.i [2023-11-28 23:45:21,968 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-28 23:45:22,200 INFO L384 CDTParser]: Found 1 translation units. [2023-11-28 23:45:22,200 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4bf477-3dfc-4398-a6e3-dcf5ebd05fca/sv-benchmarks/c/pthread-ext/31_simple_loop5_vs.i [2023-11-28 23:45:22,217 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4bf477-3dfc-4398-a6e3-dcf5ebd05fca/bin/uautomizer-verify-BQ2R08f2Ya/data/882ffdee7/bc9c2d698bba408a943693dc861beff9/FLAGca5ad9698 [2023-11-28 23:45:22,229 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4bf477-3dfc-4398-a6e3-dcf5ebd05fca/bin/uautomizer-verify-BQ2R08f2Ya/data/882ffdee7/bc9c2d698bba408a943693dc861beff9 [2023-11-28 23:45:22,231 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-28 23:45:22,233 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-28 23:45:22,234 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-28 23:45:22,234 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-28 23:45:22,239 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-28 23:45:22,240 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 11:45:22" (1/1) ... [2023-11-28 23:45:22,241 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f4bf223 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:45:22, skipping insertion in model container [2023-11-28 23:45:22,241 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 11:45:22" (1/1) ... [2023-11-28 23:45:22,289 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-28 23:45:22,576 WARN L240 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_5c4bf477-3dfc-4398-a6e3-dcf5ebd05fca/sv-benchmarks/c/pthread-ext/31_simple_loop5_vs.i[30438,30451] [2023-11-28 23:45:22,584 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-28 23:45:22,595 INFO L202 MainTranslator]: Completed pre-run [2023-11-28 23:45:22,631 WARN L240 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_5c4bf477-3dfc-4398-a6e3-dcf5ebd05fca/sv-benchmarks/c/pthread-ext/31_simple_loop5_vs.i[30438,30451] [2023-11-28 23:45:22,634 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-28 23:45:22,672 INFO L206 MainTranslator]: Completed translation [2023-11-28 23:45:22,673 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:45:22 WrapperNode [2023-11-28 23:45:22,673 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-28 23:45:22,674 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-28 23:45:22,674 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-28 23:45:22,674 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-28 23:45:22,682 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:45:22" (1/1) ... [2023-11-28 23:45:22,695 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:45:22" (1/1) ... [2023-11-28 23:45:22,717 INFO L138 Inliner]: procedures = 170, calls = 18, calls flagged for inlining = 8, calls inlined = 10, statements flattened = 82 [2023-11-28 23:45:22,718 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-28 23:45:22,719 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-28 23:45:22,719 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-28 23:45:22,719 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-28 23:45:22,730 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:45:22" (1/1) ... [2023-11-28 23:45:22,730 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:45:22" (1/1) ... [2023-11-28 23:45:22,733 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:45:22" (1/1) ... [2023-11-28 23:45:22,747 INFO L175 MemorySlicer]: Split 4 memory accesses to 2 slices as follows [2, 2]. 50 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]. [2023-11-28 23:45:22,747 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:45:22" (1/1) ... [2023-11-28 23:45:22,748 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:45:22" (1/1) ... [2023-11-28 23:45:22,753 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:45:22" (1/1) ... [2023-11-28 23:45:22,757 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:45:22" (1/1) ... [2023-11-28 23:45:22,759 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:45:22" (1/1) ... [2023-11-28 23:45:22,760 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:45:22" (1/1) ... [2023-11-28 23:45:22,763 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-28 23:45:22,764 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-28 23:45:22,764 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-28 23:45:22,765 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-28 23:45:22,765 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:45:22" (1/1) ... [2023-11-28 23:45:22,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-28 23:45:22,782 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4bf477-3dfc-4398-a6e3-dcf5ebd05fca/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:45:22,794 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4bf477-3dfc-4398-a6e3-dcf5ebd05fca/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-28 23:45:22,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4bf477-3dfc-4398-a6e3-dcf5ebd05fca/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-28 23:45:22,827 INFO L130 BoogieDeclarations]: Found specification of procedure thr2 [2023-11-28 23:45:22,828 INFO L138 BoogieDeclarations]: Found implementation of procedure thr2 [2023-11-28 23:45:22,828 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-11-28 23:45:22,828 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-11-28 23:45:22,828 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-28 23:45:22,829 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-28 23:45:22,829 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-28 23:45:22,829 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-28 23:45:22,829 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-28 23:45:22,829 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-28 23:45:22,830 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-28 23:45:22,830 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-28 23:45:22,830 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-28 23:45:22,832 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-28 23:45:22,950 INFO L241 CfgBuilder]: Building ICFG [2023-11-28 23:45:22,951 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-28 23:45:23,083 INFO L282 CfgBuilder]: Performing block encoding [2023-11-28 23:45:23,179 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-28 23:45:23,180 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-28 23:45:23,180 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 11:45:23 BoogieIcfgContainer [2023-11-28 23:45:23,180 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-28 23:45:23,182 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-28 23:45:23,183 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-28 23:45:23,185 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-28 23:45:23,186 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 11:45:22" (1/3) ... [2023-11-28 23:45:23,186 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@705b444d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 11:45:23, skipping insertion in model container [2023-11-28 23:45:23,186 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:45:22" (2/3) ... [2023-11-28 23:45:23,187 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@705b444d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 11:45:23, skipping insertion in model container [2023-11-28 23:45:23,187 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 11:45:23" (3/3) ... [2023-11-28 23:45:23,188 INFO L112 eAbstractionObserver]: Analyzing ICFG 31_simple_loop5_vs.i [2023-11-28 23:45:23,194 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-28 23:45:23,203 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-28 23:45:23,203 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-28 23:45:23,204 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-28 23:45:23,235 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-28 23:45:23,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 27 places, 24 transitions, 56 flow [2023-11-28 23:45:23,301 INFO L124 PetriNetUnfolderBase]: 3/25 cut-off events. [2023-11-28 23:45:23,301 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-28 23:45:23,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32 conditions, 25 events. 3/25 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 51 event pairs, 0 based on Foata normal form. 0/19 useless extension candidates. Maximal degree in co-relation 25. Up to 2 conditions per place. [2023-11-28 23:45:23,304 INFO L82 GeneralOperation]: Start removeDead. Operand has 27 places, 24 transitions, 56 flow [2023-11-28 23:45:23,307 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 26 places, 23 transitions, 53 flow [2023-11-28 23:45:23,317 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-28 23:45:23,322 INFO L357 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, mHoare=true, 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;@3034b020, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-28 23:45:23,322 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-28 23:45:23,330 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-28 23:45:23,331 INFO L124 PetriNetUnfolderBase]: 2/20 cut-off events. [2023-11-28 23:45:23,331 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-28 23:45:23,331 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 23:45:23,332 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:45:23,332 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-28 23:45:23,337 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:45:23,338 INFO L85 PathProgramCache]: Analyzing trace with hash 32344680, now seen corresponding path program 1 times [2023-11-28 23:45:23,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:45:23,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50382645] [2023-11-28 23:45:23,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:45:23,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:45:23,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:45:23,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:45:23,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:45:23,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50382645] [2023-11-28 23:45:23,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50382645] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:45:23,610 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:45:23,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-28 23:45:23,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404859680] [2023-11-28 23:45:23,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:45:23,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 23:45:23,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:45:23,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 23:45:23,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 23:45:23,650 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 24 [2023-11-28 23:45:23,652 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 23 transitions, 53 flow. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:45:23,653 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 23:45:23,653 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 24 [2023-11-28 23:45:23,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 23:45:23,735 INFO L124 PetriNetUnfolderBase]: 99/199 cut-off events. [2023-11-28 23:45:23,735 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-28 23:45:23,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 373 conditions, 199 events. 99/199 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 750 event pairs, 27 based on Foata normal form. 72/264 useless extension candidates. Maximal degree in co-relation 363. Up to 106 conditions per place. [2023-11-28 23:45:23,740 INFO L140 encePairwiseOnDemand]: 17/24 looper letters, 16 selfloop transitions, 2 changer transitions 0/25 dead transitions. [2023-11-28 23:45:23,740 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 25 transitions, 93 flow [2023-11-28 23:45:23,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 23:45:23,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-28 23:45:23,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 50 transitions. [2023-11-28 23:45:23,750 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6944444444444444 [2023-11-28 23:45:23,751 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 50 transitions. [2023-11-28 23:45:23,751 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 50 transitions. [2023-11-28 23:45:23,752 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 23:45:23,754 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 50 transitions. [2023-11-28 23:45:23,756 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:45:23,758 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:45:23,758 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:45:23,760 INFO L175 Difference]: Start difference. First operand has 26 places, 23 transitions, 53 flow. Second operand 3 states and 50 transitions. [2023-11-28 23:45:23,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 25 transitions, 93 flow [2023-11-28 23:45:23,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 25 transitions, 92 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-28 23:45:23,764 INFO L231 Difference]: Finished difference. Result has 25 places, 20 transitions, 56 flow [2023-11-28 23:45:23,766 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=44, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=56, PETRI_PLACES=25, PETRI_TRANSITIONS=20} [2023-11-28 23:45:23,769 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, -1 predicate places. [2023-11-28 23:45:23,769 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 20 transitions, 56 flow [2023-11-28 23:45:23,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:45:23,769 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 23:45:23,769 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-11-28 23:45:23,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-28 23:45:23,770 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-28 23:45:23,770 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:45:23,771 INFO L85 PathProgramCache]: Analyzing trace with hash 177235350, now seen corresponding path program 1 times [2023-11-28 23:45:23,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:45:23,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656230844] [2023-11-28 23:45:23,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:45:23,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:45:23,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-28 23:45:23,795 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-28 23:45:23,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-28 23:45:23,827 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-28 23:45:23,827 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-28 23:45:23,829 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-11-28 23:45:23,830 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-11-28 23:45:23,831 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2023-11-28 23:45:23,831 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-11-28 23:45:23,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-28 23:45:23,832 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-28 23:45:23,834 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-28 23:45:23,834 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-28 23:45:23,856 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-28 23:45:23,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 45 places, 41 transitions, 102 flow [2023-11-28 23:45:23,867 INFO L124 PetriNetUnfolderBase]: 4/35 cut-off events. [2023-11-28 23:45:23,867 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-28 23:45:23,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47 conditions, 35 events. 4/35 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 70 event pairs, 0 based on Foata normal form. 0/27 useless extension candidates. Maximal degree in co-relation 42. Up to 3 conditions per place. [2023-11-28 23:45:23,868 INFO L82 GeneralOperation]: Start removeDead. Operand has 45 places, 41 transitions, 102 flow [2023-11-28 23:45:23,869 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 34 places, 30 transitions, 73 flow [2023-11-28 23:45:23,870 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-28 23:45:23,871 INFO L357 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, mHoare=true, 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;@3034b020, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-28 23:45:23,872 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-28 23:45:23,875 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-28 23:45:23,876 INFO L124 PetriNetUnfolderBase]: 2/16 cut-off events. [2023-11-28 23:45:23,876 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-28 23:45:23,876 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 23:45:23,876 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:45:23,876 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-28 23:45:23,877 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:45:23,877 INFO L85 PathProgramCache]: Analyzing trace with hash -557996121, now seen corresponding path program 1 times [2023-11-28 23:45:23,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:45:23,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350048610] [2023-11-28 23:45:23,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:45:23,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:45:23,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:45:23,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:45:23,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:45:23,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350048610] [2023-11-28 23:45:23,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350048610] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:45:23,959 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:45:23,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-28 23:45:23,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312576433] [2023-11-28 23:45:23,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:45:23,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 23:45:23,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:45:23,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 23:45:23,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 23:45:23,967 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2023-11-28 23:45:23,968 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 30 transitions, 73 flow. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 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) [2023-11-28 23:45:23,968 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 23:45:23,968 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2023-11-28 23:45:23,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 23:45:24,139 INFO L124 PetriNetUnfolderBase]: 693/1119 cut-off events. [2023-11-28 23:45:24,139 INFO L125 PetriNetUnfolderBase]: For 59/59 co-relation queries the response was YES. [2023-11-28 23:45:24,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2158 conditions, 1119 events. 693/1119 cut-off events. For 59/59 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 5467 event pairs, 138 based on Foata normal form. 443/1540 useless extension candidates. Maximal degree in co-relation 2147. Up to 814 conditions per place. [2023-11-28 23:45:24,150 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 22 selfloop transitions, 3 changer transitions 0/34 dead transitions. [2023-11-28 23:45:24,150 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 34 transitions, 136 flow [2023-11-28 23:45:24,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 23:45:24,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-28 23:45:24,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 77 transitions. [2023-11-28 23:45:24,153 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6260162601626016 [2023-11-28 23:45:24,153 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 77 transitions. [2023-11-28 23:45:24,154 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 77 transitions. [2023-11-28 23:45:24,154 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 23:45:24,154 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 77 transitions. [2023-11-28 23:45:24,155 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:45:24,156 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 41.0) internal successors, (164), 4 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:45:24,156 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 41.0) internal successors, (164), 4 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:45:24,156 INFO L175 Difference]: Start difference. First operand has 34 places, 30 transitions, 73 flow. Second operand 3 states and 77 transitions. [2023-11-28 23:45:24,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 34 transitions, 136 flow [2023-11-28 23:45:24,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 34 transitions, 135 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-28 23:45:24,159 INFO L231 Difference]: Finished difference. Result has 32 places, 27 transitions, 81 flow [2023-11-28 23:45:24,159 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=81, PETRI_PLACES=32, PETRI_TRANSITIONS=27} [2023-11-28 23:45:24,160 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, -2 predicate places. [2023-11-28 23:45:24,160 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 27 transitions, 81 flow [2023-11-28 23:45:24,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 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) [2023-11-28 23:45:24,161 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 23:45:24,161 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1] [2023-11-28 23:45:24,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-28 23:45:24,161 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-28 23:45:24,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:45:24,162 INFO L85 PathProgramCache]: Analyzing trace with hash -749585487, now seen corresponding path program 1 times [2023-11-28 23:45:24,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:45:24,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80337495] [2023-11-28 23:45:24,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:45:24,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:45:24,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-28 23:45:24,184 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-28 23:45:24,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-28 23:45:24,200 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-28 23:45:24,200 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-28 23:45:24,200 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-11-28 23:45:24,200 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-11-28 23:45:24,201 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 5 remaining) [2023-11-28 23:45:24,201 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-11-28 23:45:24,201 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-11-28 23:45:24,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-28 23:45:24,202 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-28 23:45:24,203 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-28 23:45:24,203 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-28 23:45:24,229 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-28 23:45:24,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 63 places, 58 transitions, 152 flow [2023-11-28 23:45:24,236 INFO L124 PetriNetUnfolderBase]: 5/45 cut-off events. [2023-11-28 23:45:24,236 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-28 23:45:24,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63 conditions, 45 events. 5/45 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 92 event pairs, 0 based on Foata normal form. 0/35 useless extension candidates. Maximal degree in co-relation 56. Up to 4 conditions per place. [2023-11-28 23:45:24,237 INFO L82 GeneralOperation]: Start removeDead. Operand has 63 places, 58 transitions, 152 flow [2023-11-28 23:45:24,238 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 37 transitions, 95 flow [2023-11-28 23:45:24,238 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-28 23:45:24,240 INFO L357 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, mHoare=true, 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;@3034b020, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-28 23:45:24,240 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-11-28 23:45:24,242 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-28 23:45:24,242 INFO L124 PetriNetUnfolderBase]: 2/16 cut-off events. [2023-11-28 23:45:24,242 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-28 23:45:24,242 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 23:45:24,242 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:45:24,243 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-11-28 23:45:24,243 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:45:24,243 INFO L85 PathProgramCache]: Analyzing trace with hash 1565831264, now seen corresponding path program 1 times [2023-11-28 23:45:24,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:45:24,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427606471] [2023-11-28 23:45:24,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:45:24,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:45:24,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:45:24,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:45:24,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:45:24,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427606471] [2023-11-28 23:45:24,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427606471] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:45:24,302 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:45:24,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-28 23:45:24,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382543808] [2023-11-28 23:45:24,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:45:24,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 23:45:24,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:45:24,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 23:45:24,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 23:45:24,314 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 58 [2023-11-28 23:45:24,314 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 37 transitions, 95 flow. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 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) [2023-11-28 23:45:24,315 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 23:45:24,315 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 58 [2023-11-28 23:45:24,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 23:45:24,823 INFO L124 PetriNetUnfolderBase]: 3801/5475 cut-off events. [2023-11-28 23:45:24,824 INFO L125 PetriNetUnfolderBase]: For 515/515 co-relation queries the response was YES. [2023-11-28 23:45:24,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10739 conditions, 5475 events. 3801/5475 cut-off events. For 515/515 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 29397 event pairs, 723 based on Foata normal form. 2292/7695 useless extension candidates. Maximal degree in co-relation 10727. Up to 4510 conditions per place. [2023-11-28 23:45:24,900 INFO L140 encePairwiseOnDemand]: 47/58 looper letters, 28 selfloop transitions, 4 changer transitions 0/43 dead transitions. [2023-11-28 23:45:24,900 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 43 transitions, 183 flow [2023-11-28 23:45:24,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 23:45:24,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-28 23:45:24,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 104 transitions. [2023-11-28 23:45:24,902 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5977011494252874 [2023-11-28 23:45:24,902 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 104 transitions. [2023-11-28 23:45:24,902 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 104 transitions. [2023-11-28 23:45:24,902 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 23:45:24,903 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 104 transitions. [2023-11-28 23:45:24,904 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:45:24,904 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 58.0) internal successors, (232), 4 states have internal predecessors, (232), 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) [2023-11-28 23:45:24,905 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 58.0) internal successors, (232), 4 states have internal predecessors, (232), 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) [2023-11-28 23:45:24,905 INFO L175 Difference]: Start difference. First operand has 42 places, 37 transitions, 95 flow. Second operand 3 states and 104 transitions. [2023-11-28 23:45:24,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 43 transitions, 183 flow [2023-11-28 23:45:24,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 43 transitions, 178 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-11-28 23:45:24,908 INFO L231 Difference]: Finished difference. Result has 39 places, 34 transitions, 106 flow [2023-11-28 23:45:24,908 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=106, PETRI_PLACES=39, PETRI_TRANSITIONS=34} [2023-11-28 23:45:24,909 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -3 predicate places. [2023-11-28 23:45:24,909 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 34 transitions, 106 flow [2023-11-28 23:45:24,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 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) [2023-11-28 23:45:24,909 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 23:45:24,910 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:45:24,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-28 23:45:24,910 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-11-28 23:45:24,910 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:45:24,910 INFO L85 PathProgramCache]: Analyzing trace with hash 1917220104, now seen corresponding path program 1 times [2023-11-28 23:45:24,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:45:24,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429160029] [2023-11-28 23:45:24,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:45:24,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:45:24,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:45:24,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:45:24,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:45:24,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429160029] [2023-11-28 23:45:24,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429160029] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:45:24,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:45:24,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-28 23:45:24,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955747238] [2023-11-28 23:45:24,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:45:24,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 23:45:24,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:45:24,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 23:45:24,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 23:45:24,960 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 58 [2023-11-28 23:45:24,960 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 34 transitions, 106 flow. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:45:24,960 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 23:45:24,960 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 58 [2023-11-28 23:45:24,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 23:45:25,121 INFO L124 PetriNetUnfolderBase]: 459/974 cut-off events. [2023-11-28 23:45:25,121 INFO L125 PetriNetUnfolderBase]: For 157/157 co-relation queries the response was YES. [2023-11-28 23:45:25,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2135 conditions, 974 events. 459/974 cut-off events. For 157/157 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 5262 event pairs, 87 based on Foata normal form. 691/1622 useless extension candidates. Maximal degree in co-relation 2121. Up to 608 conditions per place. [2023-11-28 23:45:25,131 INFO L140 encePairwiseOnDemand]: 50/58 looper letters, 20 selfloop transitions, 8 changer transitions 0/40 dead transitions. [2023-11-28 23:45:25,132 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 40 transitions, 187 flow [2023-11-28 23:45:25,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 23:45:25,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-28 23:45:25,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 98 transitions. [2023-11-28 23:45:25,133 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5632183908045977 [2023-11-28 23:45:25,134 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 98 transitions. [2023-11-28 23:45:25,134 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 98 transitions. [2023-11-28 23:45:25,134 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 23:45:25,134 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 98 transitions. [2023-11-28 23:45:25,135 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 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) [2023-11-28 23:45:25,136 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 58.0) internal successors, (232), 4 states have internal predecessors, (232), 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) [2023-11-28 23:45:25,136 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 58.0) internal successors, (232), 4 states have internal predecessors, (232), 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) [2023-11-28 23:45:25,136 INFO L175 Difference]: Start difference. First operand has 39 places, 34 transitions, 106 flow. Second operand 3 states and 98 transitions. [2023-11-28 23:45:25,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 40 transitions, 187 flow [2023-11-28 23:45:25,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 40 transitions, 183 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-28 23:45:25,139 INFO L231 Difference]: Finished difference. Result has 40 places, 34 transitions, 118 flow [2023-11-28 23:45:25,139 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=118, PETRI_PLACES=40, PETRI_TRANSITIONS=34} [2023-11-28 23:45:25,140 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -2 predicate places. [2023-11-28 23:45:25,140 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 34 transitions, 118 flow [2023-11-28 23:45:25,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:45:25,141 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 23:45:25,141 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:45:25,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-28 23:45:25,141 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-11-28 23:45:25,142 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:45:25,142 INFO L85 PathProgramCache]: Analyzing trace with hash -1943065003, now seen corresponding path program 1 times [2023-11-28 23:45:25,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:45:25,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560576611] [2023-11-28 23:45:25,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:45:25,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:45:25,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-28 23:45:25,161 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-28 23:45:25,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-28 23:45:25,174 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-28 23:45:25,175 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-28 23:45:25,175 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2023-11-28 23:45:25,175 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2023-11-28 23:45:25,175 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 6 remaining) [2023-11-28 23:45:25,175 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2023-11-28 23:45:25,175 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2023-11-28 23:45:25,176 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2023-11-28 23:45:25,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-28 23:45:25,176 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-28 23:45:25,177 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-28 23:45:25,177 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-28 23:45:25,206 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-28 23:45:25,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 81 places, 75 transitions, 206 flow [2023-11-28 23:45:25,214 INFO L124 PetriNetUnfolderBase]: 6/55 cut-off events. [2023-11-28 23:45:25,215 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-28 23:45:25,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80 conditions, 55 events. 6/55 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 105 event pairs, 0 based on Foata normal form. 0/43 useless extension candidates. Maximal degree in co-relation 71. Up to 5 conditions per place. [2023-11-28 23:45:25,215 INFO L82 GeneralOperation]: Start removeDead. Operand has 81 places, 75 transitions, 206 flow [2023-11-28 23:45:25,216 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 50 places, 44 transitions, 119 flow [2023-11-28 23:45:25,217 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-28 23:45:25,218 INFO L357 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, mHoare=true, 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;@3034b020, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-28 23:45:25,218 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-11-28 23:45:25,220 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-28 23:45:25,220 INFO L124 PetriNetUnfolderBase]: 2/16 cut-off events. [2023-11-28 23:45:25,220 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-28 23:45:25,220 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 23:45:25,221 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:45:25,221 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-28 23:45:25,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:45:25,221 INFO L85 PathProgramCache]: Analyzing trace with hash 2108859539, now seen corresponding path program 1 times [2023-11-28 23:45:25,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:45:25,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791942185] [2023-11-28 23:45:25,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:45:25,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:45:25,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:45:25,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:45:25,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:45:25,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791942185] [2023-11-28 23:45:25,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791942185] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:45:25,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:45:25,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-28 23:45:25,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290047824] [2023-11-28 23:45:25,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:45:25,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 23:45:25,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:45:25,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 23:45:25,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 23:45:25,301 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 75 [2023-11-28 23:45:25,301 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 44 transitions, 119 flow. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 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) [2023-11-28 23:45:25,301 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 23:45:25,301 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 75 [2023-11-28 23:45:25,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 23:45:27,980 INFO L124 PetriNetUnfolderBase]: 19029/25539 cut-off events. [2023-11-28 23:45:27,980 INFO L125 PetriNetUnfolderBase]: For 3395/3395 co-relation queries the response was YES. [2023-11-28 23:45:28,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50616 conditions, 25539 events. 19029/25539 cut-off events. For 3395/3395 co-relation queries the response was YES. Maximal size of possible extension queue 1063. Compared 144641 event pairs, 3960 based on Foata normal form. 11087/36401 useless extension candidates. Maximal degree in co-relation 50603. Up to 22390 conditions per place. [2023-11-28 23:45:28,205 INFO L140 encePairwiseOnDemand]: 62/75 looper letters, 34 selfloop transitions, 5 changer transitions 0/52 dead transitions. [2023-11-28 23:45:28,205 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 52 transitions, 234 flow [2023-11-28 23:45:28,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 23:45:28,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-28 23:45:28,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 131 transitions. [2023-11-28 23:45:28,208 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5822222222222222 [2023-11-28 23:45:28,208 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 131 transitions. [2023-11-28 23:45:28,208 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 131 transitions. [2023-11-28 23:45:28,208 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 23:45:28,209 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 131 transitions. [2023-11-28 23:45:28,209 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 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) [2023-11-28 23:45:28,211 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 75.0) internal successors, (300), 4 states have internal predecessors, (300), 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) [2023-11-28 23:45:28,211 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 75.0) internal successors, (300), 4 states have internal predecessors, (300), 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) [2023-11-28 23:45:28,212 INFO L175 Difference]: Start difference. First operand has 50 places, 44 transitions, 119 flow. Second operand 3 states and 131 transitions. [2023-11-28 23:45:28,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 52 transitions, 234 flow [2023-11-28 23:45:28,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 52 transitions, 221 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-11-28 23:45:28,216 INFO L231 Difference]: Finished difference. Result has 46 places, 41 transitions, 131 flow [2023-11-28 23:45:28,217 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=131, PETRI_PLACES=46, PETRI_TRANSITIONS=41} [2023-11-28 23:45:28,218 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, -4 predicate places. [2023-11-28 23:45:28,218 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 41 transitions, 131 flow [2023-11-28 23:45:28,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 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) [2023-11-28 23:45:28,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 23:45:28,218 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:45:28,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-28 23:45:28,219 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-28 23:45:28,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:45:28,219 INFO L85 PathProgramCache]: Analyzing trace with hash -1991174929, now seen corresponding path program 1 times [2023-11-28 23:45:28,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:45:28,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544199693] [2023-11-28 23:45:28,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:45:28,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:45:28,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:45:28,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:45:28,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:45:28,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544199693] [2023-11-28 23:45:28,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544199693] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:45:28,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:45:28,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-28 23:45:28,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485090126] [2023-11-28 23:45:28,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:45:28,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 23:45:28,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:45:28,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 23:45:28,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 23:45:28,273 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 75 [2023-11-28 23:45:28,274 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 41 transitions, 131 flow. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 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) [2023-11-28 23:45:28,274 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 23:45:28,274 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 75 [2023-11-28 23:45:28,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 23:45:28,652 INFO L124 PetriNetUnfolderBase]: 1176/2367 cut-off events. [2023-11-28 23:45:28,652 INFO L125 PetriNetUnfolderBase]: For 503/503 co-relation queries the response was YES. [2023-11-28 23:45:28,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5235 conditions, 2367 events. 1176/2367 cut-off events. For 503/503 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 14756 event pairs, 214 based on Foata normal form. 2343/4619 useless extension candidates. Maximal degree in co-relation 5220. Up to 1539 conditions per place. [2023-11-28 23:45:28,674 INFO L140 encePairwiseOnDemand]: 65/75 looper letters, 24 selfloop transitions, 10 changer transitions 0/48 dead transitions. [2023-11-28 23:45:28,675 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 48 transitions, 231 flow [2023-11-28 23:45:28,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 23:45:28,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-28 23:45:28,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 125 transitions. [2023-11-28 23:45:28,677 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2023-11-28 23:45:28,677 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 125 transitions. [2023-11-28 23:45:28,677 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 125 transitions. [2023-11-28 23:45:28,677 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 23:45:28,677 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 125 transitions. [2023-11-28 23:45:28,678 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 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) [2023-11-28 23:45:28,679 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 75.0) internal successors, (300), 4 states have internal predecessors, (300), 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) [2023-11-28 23:45:28,680 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 75.0) internal successors, (300), 4 states have internal predecessors, (300), 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) [2023-11-28 23:45:28,680 INFO L175 Difference]: Start difference. First operand has 46 places, 41 transitions, 131 flow. Second operand 3 states and 125 transitions. [2023-11-28 23:45:28,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 48 transitions, 231 flow [2023-11-28 23:45:28,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 48 transitions, 226 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-28 23:45:28,684 INFO L231 Difference]: Finished difference. Result has 47 places, 41 transitions, 146 flow [2023-11-28 23:45:28,685 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=146, PETRI_PLACES=47, PETRI_TRANSITIONS=41} [2023-11-28 23:45:28,685 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, -3 predicate places. [2023-11-28 23:45:28,686 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 41 transitions, 146 flow [2023-11-28 23:45:28,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 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) [2023-11-28 23:45:28,686 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 23:45:28,686 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:45:28,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-28 23:45:28,687 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-28 23:45:28,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:45:28,687 INFO L85 PathProgramCache]: Analyzing trace with hash 1689741336, now seen corresponding path program 1 times [2023-11-28 23:45:28,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:45:28,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333768466] [2023-11-28 23:45:28,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:45:28,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:45:28,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:45:28,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:45:28,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:45:28,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333768466] [2023-11-28 23:45:28,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333768466] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:45:28,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:45:28,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-28 23:45:28,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856366504] [2023-11-28 23:45:28,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:45:28,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-28 23:45:28,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:45:28,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-28 23:45:28,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-28 23:45:28,776 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 75 [2023-11-28 23:45:28,777 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 41 transitions, 146 flow. Second operand has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:45:28,777 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 23:45:28,777 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 75 [2023-11-28 23:45:28,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 23:45:29,247 INFO L124 PetriNetUnfolderBase]: 1852/3652 cut-off events. [2023-11-28 23:45:29,247 INFO L125 PetriNetUnfolderBase]: For 1083/1116 co-relation queries the response was YES. [2023-11-28 23:45:29,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9531 conditions, 3652 events. 1852/3652 cut-off events. For 1083/1116 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 25089 event pairs, 85 based on Foata normal form. 36/3672 useless extension candidates. Maximal degree in co-relation 9516. Up to 2321 conditions per place. [2023-11-28 23:45:29,268 INFO L140 encePairwiseOnDemand]: 69/75 looper letters, 49 selfloop transitions, 9 changer transitions 0/71 dead transitions. [2023-11-28 23:45:29,268 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 71 transitions, 392 flow [2023-11-28 23:45:29,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-28 23:45:29,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-28 23:45:29,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 163 transitions. [2023-11-28 23:45:29,270 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5433333333333333 [2023-11-28 23:45:29,270 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 163 transitions. [2023-11-28 23:45:29,270 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 163 transitions. [2023-11-28 23:45:29,270 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 23:45:29,271 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 163 transitions. [2023-11-28 23:45:29,271 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 40.75) internal successors, (163), 4 states have internal predecessors, (163), 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) [2023-11-28 23:45:29,273 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 75.0) internal successors, (375), 5 states have internal predecessors, (375), 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) [2023-11-28 23:45:29,273 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 75.0) internal successors, (375), 5 states have internal predecessors, (375), 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) [2023-11-28 23:45:29,273 INFO L175 Difference]: Start difference. First operand has 47 places, 41 transitions, 146 flow. Second operand 4 states and 163 transitions. [2023-11-28 23:45:29,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 71 transitions, 392 flow [2023-11-28 23:45:29,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 71 transitions, 366 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-28 23:45:29,279 INFO L231 Difference]: Finished difference. Result has 50 places, 45 transitions, 188 flow [2023-11-28 23:45:29,279 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=188, PETRI_PLACES=50, PETRI_TRANSITIONS=45} [2023-11-28 23:45:29,280 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 0 predicate places. [2023-11-28 23:45:29,280 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 45 transitions, 188 flow [2023-11-28 23:45:29,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:45:29,280 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 23:45:29,280 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:45:29,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-28 23:45:29,281 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-28 23:45:29,281 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:45:29,281 INFO L85 PathProgramCache]: Analyzing trace with hash 1318144147, now seen corresponding path program 1 times [2023-11-28 23:45:29,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:45:29,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872416221] [2023-11-28 23:45:29,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:45:29,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:45:29,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-28 23:45:29,300 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-28 23:45:29,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-28 23:45:29,315 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-28 23:45:29,315 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-28 23:45:29,315 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2023-11-28 23:45:29,316 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2023-11-28 23:45:29,316 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 7 remaining) [2023-11-28 23:45:29,316 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 7 remaining) [2023-11-28 23:45:29,316 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 7 remaining) [2023-11-28 23:45:29,316 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 7 remaining) [2023-11-28 23:45:29,317 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2023-11-28 23:45:29,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-28 23:45:29,317 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-11-28 23:45:29,318 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-28 23:45:29,318 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-11-28 23:45:29,354 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-28 23:45:29,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 99 places, 92 transitions, 264 flow [2023-11-28 23:45:29,362 INFO L124 PetriNetUnfolderBase]: 7/65 cut-off events. [2023-11-28 23:45:29,363 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-11-28 23:45:29,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98 conditions, 65 events. 7/65 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 132 event pairs, 0 based on Foata normal form. 0/51 useless extension candidates. Maximal degree in co-relation 87. Up to 6 conditions per place. [2023-11-28 23:45:29,363 INFO L82 GeneralOperation]: Start removeDead. Operand has 99 places, 92 transitions, 264 flow [2023-11-28 23:45:29,364 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 58 places, 51 transitions, 145 flow [2023-11-28 23:45:29,365 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-28 23:45:29,366 INFO L357 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, mHoare=true, 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;@3034b020, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-28 23:45:29,366 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2023-11-28 23:45:29,368 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-28 23:45:29,368 INFO L124 PetriNetUnfolderBase]: 2/16 cut-off events. [2023-11-28 23:45:29,368 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-28 23:45:29,368 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 23:45:29,368 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:45:29,368 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2023-11-28 23:45:29,368 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:45:29,369 INFO L85 PathProgramCache]: Analyzing trace with hash 1036733724, now seen corresponding path program 1 times [2023-11-28 23:45:29,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:45:29,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408796127] [2023-11-28 23:45:29,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:45:29,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:45:29,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:45:29,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:45:29,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:45:29,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408796127] [2023-11-28 23:45:29,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408796127] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:45:29,412 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:45:29,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-28 23:45:29,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153935473] [2023-11-28 23:45:29,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:45:29,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 23:45:29,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:45:29,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 23:45:29,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 23:45:29,425 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 92 [2023-11-28 23:45:29,425 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 51 transitions, 145 flow. Second operand has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:45:29,425 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 23:45:29,425 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 92 [2023-11-28 23:45:29,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 23:45:37,443 INFO L124 PetriNetUnfolderBase]: 91293/116751 cut-off events. [2023-11-28 23:45:37,443 INFO L125 PetriNetUnfolderBase]: For 19847/19847 co-relation queries the response was YES. [2023-11-28 23:45:37,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 233065 conditions, 116751 events. 91293/116751 cut-off events. For 19847/19847 co-relation queries the response was YES. Maximal size of possible extension queue 3851. Compared 682770 event pairs, 21477 based on Foata normal form. 51884/167991 useless extension candidates. Maximal degree in co-relation 233051. Up to 105970 conditions per place. [2023-11-28 23:45:38,105 INFO L140 encePairwiseOnDemand]: 77/92 looper letters, 40 selfloop transitions, 6 changer transitions 0/61 dead transitions. [2023-11-28 23:45:38,106 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 61 transitions, 289 flow [2023-11-28 23:45:38,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 23:45:38,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-28 23:45:38,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 158 transitions. [2023-11-28 23:45:38,107 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.572463768115942 [2023-11-28 23:45:38,107 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 158 transitions. [2023-11-28 23:45:38,107 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 158 transitions. [2023-11-28 23:45:38,107 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 23:45:38,107 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 158 transitions. [2023-11-28 23:45:38,108 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 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) [2023-11-28 23:45:38,109 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 92.0) internal successors, (368), 4 states have internal predecessors, (368), 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) [2023-11-28 23:45:38,109 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 92.0) internal successors, (368), 4 states have internal predecessors, (368), 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) [2023-11-28 23:45:38,109 INFO L175 Difference]: Start difference. First operand has 58 places, 51 transitions, 145 flow. Second operand 3 states and 158 transitions. [2023-11-28 23:45:38,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 61 transitions, 289 flow [2023-11-28 23:45:38,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 61 transitions, 264 flow, removed 12 selfloop flow, removed 1 redundant places. [2023-11-28 23:45:38,113 INFO L231 Difference]: Finished difference. Result has 53 places, 48 transitions, 156 flow [2023-11-28 23:45:38,113 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=92, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=156, PETRI_PLACES=53, PETRI_TRANSITIONS=48} [2023-11-28 23:45:38,114 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, -5 predicate places. [2023-11-28 23:45:38,114 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 48 transitions, 156 flow [2023-11-28 23:45:38,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:45:38,114 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 23:45:38,114 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:45:38,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-28 23:45:38,114 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2023-11-28 23:45:38,115 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:45:38,115 INFO L85 PathProgramCache]: Analyzing trace with hash 413531057, now seen corresponding path program 1 times [2023-11-28 23:45:38,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:45:38,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198380767] [2023-11-28 23:45:38,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:45:38,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:45:38,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:45:38,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:45:38,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:45:38,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198380767] [2023-11-28 23:45:38,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198380767] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:45:38,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:45:38,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-28 23:45:38,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540528062] [2023-11-28 23:45:38,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:45:38,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 23:45:38,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:45:38,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 23:45:38,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 23:45:38,158 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 92 [2023-11-28 23:45:38,158 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 48 transitions, 156 flow. Second operand has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 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) [2023-11-28 23:45:38,158 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 23:45:38,158 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 92 [2023-11-28 23:45:38,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 23:45:38,785 INFO L124 PetriNetUnfolderBase]: 2865/5542 cut-off events. [2023-11-28 23:45:38,785 INFO L125 PetriNetUnfolderBase]: For 1439/1439 co-relation queries the response was YES. [2023-11-28 23:45:38,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12335 conditions, 5542 events. 2865/5542 cut-off events. For 1439/1439 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 38934 event pairs, 523 based on Foata normal form. 7138/12493 useless extension candidates. Maximal degree in co-relation 12319. Up to 3714 conditions per place. [2023-11-28 23:45:38,808 INFO L140 encePairwiseOnDemand]: 80/92 looper letters, 28 selfloop transitions, 12 changer transitions 0/56 dead transitions. [2023-11-28 23:45:38,809 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 56 transitions, 275 flow [2023-11-28 23:45:38,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 23:45:38,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-28 23:45:38,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 152 transitions. [2023-11-28 23:45:38,810 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5507246376811594 [2023-11-28 23:45:38,810 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 152 transitions. [2023-11-28 23:45:38,810 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 152 transitions. [2023-11-28 23:45:38,810 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 23:45:38,810 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 152 transitions. [2023-11-28 23:45:38,811 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 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) [2023-11-28 23:45:38,811 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 92.0) internal successors, (368), 4 states have internal predecessors, (368), 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) [2023-11-28 23:45:38,812 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 92.0) internal successors, (368), 4 states have internal predecessors, (368), 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) [2023-11-28 23:45:38,812 INFO L175 Difference]: Start difference. First operand has 53 places, 48 transitions, 156 flow. Second operand 3 states and 152 transitions. [2023-11-28 23:45:38,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 56 transitions, 275 flow [2023-11-28 23:45:38,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 56 transitions, 269 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-28 23:45:38,817 INFO L231 Difference]: Finished difference. Result has 54 places, 48 transitions, 174 flow [2023-11-28 23:45:38,817 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=92, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=174, PETRI_PLACES=54, PETRI_TRANSITIONS=48} [2023-11-28 23:45:38,818 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, -4 predicate places. [2023-11-28 23:45:38,818 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 48 transitions, 174 flow [2023-11-28 23:45:38,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 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) [2023-11-28 23:45:38,818 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 23:45:38,819 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:45:38,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-28 23:45:38,819 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2023-11-28 23:45:38,819 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:45:38,819 INFO L85 PathProgramCache]: Analyzing trace with hash -2017108118, now seen corresponding path program 1 times [2023-11-28 23:45:38,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:45:38,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399923451] [2023-11-28 23:45:38,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:45:38,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:45:38,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:45:38,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:45:38,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:45:38,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399923451] [2023-11-28 23:45:38,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399923451] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:45:38,869 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:45:38,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-28 23:45:38,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097461835] [2023-11-28 23:45:38,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:45:38,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-28 23:45:38,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:45:38,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-28 23:45:38,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-28 23:45:38,901 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 92 [2023-11-28 23:45:38,901 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 48 transitions, 174 flow. Second operand has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 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) [2023-11-28 23:45:38,901 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 23:45:38,901 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 92 [2023-11-28 23:45:38,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 23:45:39,571 INFO L124 PetriNetUnfolderBase]: 4277/8114 cut-off events. [2023-11-28 23:45:39,571 INFO L125 PetriNetUnfolderBase]: For 2275/2338 co-relation queries the response was YES. [2023-11-28 23:45:39,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21474 conditions, 8114 events. 4277/8114 cut-off events. For 2275/2338 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 60787 event pairs, 161 based on Foata normal form. 57/8151 useless extension candidates. Maximal degree in co-relation 21458. Up to 5809 conditions per place. [2023-11-28 23:45:39,617 INFO L140 encePairwiseOnDemand]: 85/92 looper letters, 58 selfloop transitions, 11 changer transitions 0/84 dead transitions. [2023-11-28 23:45:39,617 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 84 transitions, 472 flow [2023-11-28 23:45:39,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-28 23:45:39,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-28 23:45:39,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 198 transitions. [2023-11-28 23:45:39,619 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5380434782608695 [2023-11-28 23:45:39,619 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 198 transitions. [2023-11-28 23:45:39,619 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 198 transitions. [2023-11-28 23:45:39,620 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 23:45:39,620 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 198 transitions. [2023-11-28 23:45:39,621 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 49.5) internal successors, (198), 4 states have internal predecessors, (198), 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) [2023-11-28 23:45:39,622 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 92.0) internal successors, (460), 5 states have internal predecessors, (460), 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) [2023-11-28 23:45:39,622 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 92.0) internal successors, (460), 5 states have internal predecessors, (460), 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) [2023-11-28 23:45:39,622 INFO L175 Difference]: Start difference. First operand has 54 places, 48 transitions, 174 flow. Second operand 4 states and 198 transitions. [2023-11-28 23:45:39,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 84 transitions, 472 flow [2023-11-28 23:45:39,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 84 transitions, 441 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-28 23:45:39,631 INFO L231 Difference]: Finished difference. Result has 57 places, 53 transitions, 226 flow [2023-11-28 23:45:39,631 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=92, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=226, PETRI_PLACES=57, PETRI_TRANSITIONS=53} [2023-11-28 23:45:39,631 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, -1 predicate places. [2023-11-28 23:45:39,631 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 53 transitions, 226 flow [2023-11-28 23:45:39,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 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) [2023-11-28 23:45:39,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 23:45:39,632 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:45:39,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-28 23:45:39,632 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2023-11-28 23:45:39,632 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:45:39,633 INFO L85 PathProgramCache]: Analyzing trace with hash -749236377, now seen corresponding path program 2 times [2023-11-28 23:45:39,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:45:39,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779661930] [2023-11-28 23:45:39,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:45:39,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:45:39,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:45:39,738 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:45:39,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:45:39,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779661930] [2023-11-28 23:45:39,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779661930] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 23:45:39,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193403178] [2023-11-28 23:45:39,739 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-28 23:45:39,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:45:39,739 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4bf477-3dfc-4398-a6e3-dcf5ebd05fca/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:45:39,741 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4bf477-3dfc-4398-a6e3-dcf5ebd05fca/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:45:39,750 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4bf477-3dfc-4398-a6e3-dcf5ebd05fca/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-28 23:45:39,880 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-28 23:45:39,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 23:45:39,882 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-28 23:45:39,884 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:45:40,010 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:45:40,010 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:45:40,067 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:45:40,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193403178] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:45:40,068 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 23:45:40,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2023-11-28 23:45:40,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977931016] [2023-11-28 23:45:40,068 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 23:45:40,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-28 23:45:40,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:45:40,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-28 23:45:40,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-11-28 23:45:40,177 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 92 [2023-11-28 23:45:40,177 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 53 transitions, 226 flow. Second operand has 11 states, 11 states have (on average 35.54545454545455) internal successors, (391), 11 states have internal predecessors, (391), 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) [2023-11-28 23:45:40,178 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 23:45:40,178 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 92 [2023-11-28 23:45:40,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 23:45:42,510 INFO L124 PetriNetUnfolderBase]: 10547/20010 cut-off events. [2023-11-28 23:45:42,510 INFO L125 PetriNetUnfolderBase]: For 8600/8999 co-relation queries the response was YES. [2023-11-28 23:45:42,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50172 conditions, 20010 events. 10547/20010 cut-off events. For 8600/8999 co-relation queries the response was YES. Maximal size of possible extension queue 870. Compared 173178 event pairs, 2022 based on Foata normal form. 183/20131 useless extension candidates. Maximal degree in co-relation 50153. Up to 6603 conditions per place. [2023-11-28 23:45:42,689 INFO L140 encePairwiseOnDemand]: 85/92 looper letters, 59 selfloop transitions, 26 changer transitions 0/100 dead transitions. [2023-11-28 23:45:42,689 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 100 transitions, 598 flow [2023-11-28 23:45:42,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-28 23:45:42,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-28 23:45:42,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 236 transitions. [2023-11-28 23:45:42,691 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5130434782608696 [2023-11-28 23:45:42,691 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 236 transitions. [2023-11-28 23:45:42,691 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 236 transitions. [2023-11-28 23:45:42,692 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 23:45:42,692 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 236 transitions. [2023-11-28 23:45:42,693 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 47.2) internal successors, (236), 5 states have internal predecessors, (236), 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) [2023-11-28 23:45:42,695 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 92.0) internal successors, (552), 6 states have internal predecessors, (552), 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) [2023-11-28 23:45:42,695 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 92.0) internal successors, (552), 6 states have internal predecessors, (552), 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) [2023-11-28 23:45:42,695 INFO L175 Difference]: Start difference. First operand has 57 places, 53 transitions, 226 flow. Second operand 5 states and 236 transitions. [2023-11-28 23:45:42,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 100 transitions, 598 flow [2023-11-28 23:45:42,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 100 transitions, 576 flow, removed 5 selfloop flow, removed 2 redundant places. [2023-11-28 23:45:42,706 INFO L231 Difference]: Finished difference. Result has 60 places, 63 transitions, 333 flow [2023-11-28 23:45:42,707 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=92, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=333, PETRI_PLACES=60, PETRI_TRANSITIONS=63} [2023-11-28 23:45:42,707 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 2 predicate places. [2023-11-28 23:45:42,707 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 63 transitions, 333 flow [2023-11-28 23:45:42,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 35.54545454545455) internal successors, (391), 11 states have internal predecessors, (391), 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) [2023-11-28 23:45:42,708 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 23:45:42,708 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:45:42,714 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4bf477-3dfc-4398-a6e3-dcf5ebd05fca/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-28 23:45:42,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4bf477-3dfc-4398-a6e3-dcf5ebd05fca/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-28 23:45:42,909 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2023-11-28 23:45:42,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:45:42,909 INFO L85 PathProgramCache]: Analyzing trace with hash -866430764, now seen corresponding path program 1 times [2023-11-28 23:45:42,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:45:42,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656372140] [2023-11-28 23:45:42,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:45:42,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:45:42,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-28 23:45:42,930 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-28 23:45:42,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-28 23:45:42,947 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-28 23:45:42,947 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-28 23:45:42,948 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (7 of 8 remaining) [2023-11-28 23:45:42,948 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (6 of 8 remaining) [2023-11-28 23:45:42,948 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 8 remaining) [2023-11-28 23:45:42,948 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 8 remaining) [2023-11-28 23:45:42,948 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 8 remaining) [2023-11-28 23:45:42,949 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 8 remaining) [2023-11-28 23:45:42,949 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 8 remaining) [2023-11-28 23:45:42,949 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 8 remaining) [2023-11-28 23:45:42,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-28 23:45:42,949 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1] [2023-11-28 23:45:42,950 WARN L233 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-28 23:45:42,950 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2023-11-28 23:45:42,995 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-28 23:45:42,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 117 places, 109 transitions, 326 flow [2023-11-28 23:45:43,007 INFO L124 PetriNetUnfolderBase]: 8/75 cut-off events. [2023-11-28 23:45:43,008 INFO L125 PetriNetUnfolderBase]: For 50/50 co-relation queries the response was YES. [2023-11-28 23:45:43,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117 conditions, 75 events. 8/75 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 141 event pairs, 0 based on Foata normal form. 0/59 useless extension candidates. Maximal degree in co-relation 104. Up to 7 conditions per place. [2023-11-28 23:45:43,008 INFO L82 GeneralOperation]: Start removeDead. Operand has 117 places, 109 transitions, 326 flow [2023-11-28 23:45:43,009 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 66 places, 58 transitions, 173 flow [2023-11-28 23:45:43,011 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-28 23:45:43,011 INFO L357 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, mHoare=true, 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;@3034b020, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-28 23:45:43,011 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2023-11-28 23:45:43,014 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-28 23:45:43,014 INFO L124 PetriNetUnfolderBase]: 2/16 cut-off events. [2023-11-28 23:45:43,014 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-28 23:45:43,014 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 23:45:43,014 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:45:43,014 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2023-11-28 23:45:43,015 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:45:43,015 INFO L85 PathProgramCache]: Analyzing trace with hash -1633368691, now seen corresponding path program 1 times [2023-11-28 23:45:43,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:45:43,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042254184] [2023-11-28 23:45:43,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:45:43,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:45:43,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:45:43,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:45:43,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:45:43,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042254184] [2023-11-28 23:45:43,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042254184] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:45:43,058 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:45:43,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-28 23:45:43,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620942393] [2023-11-28 23:45:43,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:45:43,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 23:45:43,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:45:43,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 23:45:43,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 23:45:43,076 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 109 [2023-11-28 23:45:43,077 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 58 transitions, 173 flow. Second operand has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 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) [2023-11-28 23:45:43,077 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 23:45:43,077 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 109 [2023-11-28 23:45:43,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 23:46:24,070 INFO L124 PetriNetUnfolderBase]: 426921/527247 cut-off events. [2023-11-28 23:46:24,071 INFO L125 PetriNetUnfolderBase]: For 109139/109139 co-relation queries the response was YES. [2023-11-28 23:46:25,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1058222 conditions, 527247 events. 426921/527247 cut-off events. For 109139/109139 co-relation queries the response was YES. Maximal size of possible extension queue 14609. Compared 3158508 event pairs, 112386 based on Foata normal form. 238226/763738 useless extension candidates. Maximal degree in co-relation 1058207. Up to 488530 conditions per place. [2023-11-28 23:46:27,567 INFO L140 encePairwiseOnDemand]: 92/109 looper letters, 46 selfloop transitions, 7 changer transitions 0/70 dead transitions. [2023-11-28 23:46:27,567 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 70 transitions, 348 flow [2023-11-28 23:46:27,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 23:46:27,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-28 23:46:27,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 185 transitions. [2023-11-28 23:46:27,569 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5657492354740061 [2023-11-28 23:46:27,569 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 185 transitions. [2023-11-28 23:46:27,569 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 185 transitions. [2023-11-28 23:46:27,569 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 23:46:27,569 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 185 transitions. [2023-11-28 23:46:27,570 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 61.666666666666664) internal successors, (185), 3 states have internal predecessors, (185), 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) [2023-11-28 23:46:27,571 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 109.0) internal successors, (436), 4 states have internal predecessors, (436), 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) [2023-11-28 23:46:27,571 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 109.0) internal successors, (436), 4 states have internal predecessors, (436), 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) [2023-11-28 23:46:27,571 INFO L175 Difference]: Start difference. First operand has 66 places, 58 transitions, 173 flow. Second operand 3 states and 185 transitions. [2023-11-28 23:46:27,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 70 transitions, 348 flow [2023-11-28 23:46:27,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 70 transitions, 307 flow, removed 20 selfloop flow, removed 1 redundant places. [2023-11-28 23:46:27,611 INFO L231 Difference]: Finished difference. Result has 60 places, 55 transitions, 181 flow [2023-11-28 23:46:27,611 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=109, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=181, PETRI_PLACES=60, PETRI_TRANSITIONS=55} [2023-11-28 23:46:27,611 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, -6 predicate places. [2023-11-28 23:46:27,612 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 55 transitions, 181 flow [2023-11-28 23:46:27,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 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) [2023-11-28 23:46:27,612 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 23:46:27,612 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:46:27,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-28 23:46:27,612 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2023-11-28 23:46:27,613 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:46:27,613 INFO L85 PathProgramCache]: Analyzing trace with hash 1164763260, now seen corresponding path program 1 times [2023-11-28 23:46:27,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:46:27,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250422441] [2023-11-28 23:46:27,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:46:27,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:46:27,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:46:27,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:46:27,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:46:27,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250422441] [2023-11-28 23:46:27,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250422441] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:46:27,642 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:46:27,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-28 23:46:27,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382896637] [2023-11-28 23:46:27,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:46:27,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 23:46:27,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:46:27,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 23:46:27,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 23:46:27,644 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 109 [2023-11-28 23:46:27,644 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 55 transitions, 181 flow. Second operand has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:46:27,644 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 23:46:27,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 109 [2023-11-28 23:46:27,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 23:46:28,903 INFO L124 PetriNetUnfolderBase]: 6774/12707 cut-off events. [2023-11-28 23:46:28,903 INFO L125 PetriNetUnfolderBase]: For 3869/3869 co-relation queries the response was YES. [2023-11-28 23:46:28,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28443 conditions, 12707 events. 6774/12707 cut-off events. For 3869/3869 co-relation queries the response was YES. Maximal size of possible extension queue 525. Compared 99051 event pairs, 1270 based on Foata normal form. 20344/32670 useless extension candidates. Maximal degree in co-relation 28426. Up to 8725 conditions per place. [2023-11-28 23:46:28,983 INFO L140 encePairwiseOnDemand]: 95/109 looper letters, 32 selfloop transitions, 14 changer transitions 0/64 dead transitions. [2023-11-28 23:46:28,983 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 64 transitions, 319 flow [2023-11-28 23:46:28,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 23:46:28,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-28 23:46:28,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 179 transitions. [2023-11-28 23:46:28,984 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5474006116207951 [2023-11-28 23:46:28,985 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 179 transitions. [2023-11-28 23:46:28,985 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 179 transitions. [2023-11-28 23:46:28,985 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 23:46:28,985 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 179 transitions. [2023-11-28 23:46:28,986 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 59.666666666666664) internal successors, (179), 3 states have internal predecessors, (179), 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) [2023-11-28 23:46:28,986 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 109.0) internal successors, (436), 4 states have internal predecessors, (436), 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) [2023-11-28 23:46:28,987 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 109.0) internal successors, (436), 4 states have internal predecessors, (436), 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) [2023-11-28 23:46:28,987 INFO L175 Difference]: Start difference. First operand has 60 places, 55 transitions, 181 flow. Second operand 3 states and 179 transitions. [2023-11-28 23:46:28,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 64 transitions, 319 flow [2023-11-28 23:46:28,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 64 transitions, 312 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-28 23:46:28,993 INFO L231 Difference]: Finished difference. Result has 61 places, 55 transitions, 202 flow [2023-11-28 23:46:28,993 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=109, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=202, PETRI_PLACES=61, PETRI_TRANSITIONS=55} [2023-11-28 23:46:28,994 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, -5 predicate places. [2023-11-28 23:46:28,994 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 55 transitions, 202 flow [2023-11-28 23:46:28,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:46:28,994 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 23:46:28,994 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:46:28,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-28 23:46:28,994 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2023-11-28 23:46:28,995 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:46:28,995 INFO L85 PathProgramCache]: Analyzing trace with hash -1445577994, now seen corresponding path program 1 times [2023-11-28 23:46:28,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:46:28,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83885632] [2023-11-28 23:46:28,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:46:28,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:46:29,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:46:29,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:46:29,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:46:29,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83885632] [2023-11-28 23:46:29,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83885632] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:46:29,045 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:46:29,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-28 23:46:29,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060435548] [2023-11-28 23:46:29,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:46:29,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-28 23:46:29,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:46:29,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-28 23:46:29,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-28 23:46:29,065 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 109 [2023-11-28 23:46:29,065 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 55 transitions, 202 flow. Second operand has 4 states, 4 states have (on average 40.5) internal successors, (162), 4 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:46:29,066 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 23:46:29,066 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 109 [2023-11-28 23:46:29,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 23:46:30,546 INFO L124 PetriNetUnfolderBase]: 9603/17689 cut-off events. [2023-11-28 23:46:30,546 INFO L125 PetriNetUnfolderBase]: For 4647/4747 co-relation queries the response was YES. [2023-11-28 23:46:30,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47314 conditions, 17689 events. 9603/17689 cut-off events. For 4647/4747 co-relation queries the response was YES. Maximal size of possible extension queue 802. Compared 143444 event pairs, 381 based on Foata normal form. 83/17747 useless extension candidates. Maximal degree in co-relation 47297. Up to 13837 conditions per place. [2023-11-28 23:46:30,673 INFO L140 encePairwiseOnDemand]: 101/109 looper letters, 67 selfloop transitions, 13 changer transitions 0/97 dead transitions. [2023-11-28 23:46:30,673 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 97 transitions, 552 flow [2023-11-28 23:46:30,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-28 23:46:30,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-28 23:46:30,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 233 transitions. [2023-11-28 23:46:30,675 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5344036697247706 [2023-11-28 23:46:30,675 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 233 transitions. [2023-11-28 23:46:30,675 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 233 transitions. [2023-11-28 23:46:30,675 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 23:46:30,675 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 233 transitions. [2023-11-28 23:46:30,676 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 58.25) internal successors, (233), 4 states have internal predecessors, (233), 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) [2023-11-28 23:46:30,677 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 109.0) internal successors, (545), 5 states have internal predecessors, (545), 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) [2023-11-28 23:46:30,677 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 109.0) internal successors, (545), 5 states have internal predecessors, (545), 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) [2023-11-28 23:46:30,677 INFO L175 Difference]: Start difference. First operand has 61 places, 55 transitions, 202 flow. Second operand 4 states and 233 transitions. [2023-11-28 23:46:30,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 97 transitions, 552 flow [2023-11-28 23:46:30,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 97 transitions, 516 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-28 23:46:30,694 INFO L231 Difference]: Finished difference. Result has 64 places, 61 transitions, 264 flow [2023-11-28 23:46:30,695 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=109, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=264, PETRI_PLACES=64, PETRI_TRANSITIONS=61} [2023-11-28 23:46:30,695 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, -2 predicate places. [2023-11-28 23:46:30,695 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 61 transitions, 264 flow [2023-11-28 23:46:30,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 40.5) internal successors, (162), 4 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:46:30,695 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 23:46:30,695 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:46:30,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-11-28 23:46:30,696 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2023-11-28 23:46:30,696 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:46:30,696 INFO L85 PathProgramCache]: Analyzing trace with hash -2090511053, now seen corresponding path program 2 times [2023-11-28 23:46:30,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:46:30,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15842593] [2023-11-28 23:46:30,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:46:30,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:46:30,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:46:30,769 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:46:30,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:46:30,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15842593] [2023-11-28 23:46:30,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15842593] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 23:46:30,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792381488] [2023-11-28 23:46:30,770 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-28 23:46:30,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:46:30,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4bf477-3dfc-4398-a6e3-dcf5ebd05fca/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:46:30,771 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4bf477-3dfc-4398-a6e3-dcf5ebd05fca/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:46:30,800 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4bf477-3dfc-4398-a6e3-dcf5ebd05fca/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-28 23:46:30,919 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-28 23:46:30,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 23:46:30,920 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-28 23:46:30,921 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:46:31,021 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:46:31,021 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:46:31,084 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:46:31,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792381488] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:46:31,084 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 23:46:31,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2023-11-28 23:46:31,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735539606] [2023-11-28 23:46:31,085 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 23:46:31,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-28 23:46:31,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:46:31,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-28 23:46:31,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-11-28 23:46:31,213 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 109 [2023-11-28 23:46:31,214 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 61 transitions, 264 flow. Second operand has 11 states, 11 states have (on average 41.54545454545455) internal successors, (457), 11 states have internal predecessors, (457), 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) [2023-11-28 23:46:31,214 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 23:46:31,214 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 109 [2023-11-28 23:46:31,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 23:46:35,558 INFO L124 PetriNetUnfolderBase]: 25080/46210 cut-off events. [2023-11-28 23:46:35,558 INFO L125 PetriNetUnfolderBase]: For 19852/20666 co-relation queries the response was YES. [2023-11-28 23:46:35,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116620 conditions, 46210 events. 25080/46210 cut-off events. For 19852/20666 co-relation queries the response was YES. Maximal size of possible extension queue 1825. Compared 433259 event pairs, 4736 based on Foata normal form. 382/46475 useless extension candidates. Maximal degree in co-relation 116600. Up to 15012 conditions per place. [2023-11-28 23:46:35,935 INFO L140 encePairwiseOnDemand]: 101/109 looper letters, 68 selfloop transitions, 31 changer transitions 0/116 dead transitions. [2023-11-28 23:46:35,936 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 116 transitions, 702 flow [2023-11-28 23:46:35,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-28 23:46:35,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-28 23:46:35,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 278 transitions. [2023-11-28 23:46:35,938 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5100917431192661 [2023-11-28 23:46:35,938 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 278 transitions. [2023-11-28 23:46:35,938 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 278 transitions. [2023-11-28 23:46:35,938 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 23:46:35,938 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 278 transitions. [2023-11-28 23:46:35,940 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 55.6) internal successors, (278), 5 states have internal predecessors, (278), 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) [2023-11-28 23:46:35,941 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 109.0) internal successors, (654), 6 states have internal predecessors, (654), 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) [2023-11-28 23:46:35,941 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 109.0) internal successors, (654), 6 states have internal predecessors, (654), 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) [2023-11-28 23:46:35,941 INFO L175 Difference]: Start difference. First operand has 64 places, 61 transitions, 264 flow. Second operand 5 states and 278 transitions. [2023-11-28 23:46:35,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 116 transitions, 702 flow [2023-11-28 23:46:35,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 116 transitions, 676 flow, removed 6 selfloop flow, removed 2 redundant places. [2023-11-28 23:46:35,967 INFO L231 Difference]: Finished difference. Result has 67 places, 73 transitions, 392 flow [2023-11-28 23:46:35,967 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=109, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=392, PETRI_PLACES=67, PETRI_TRANSITIONS=73} [2023-11-28 23:46:35,967 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 1 predicate places. [2023-11-28 23:46:35,967 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 73 transitions, 392 flow [2023-11-28 23:46:35,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 41.54545454545455) internal successors, (457), 11 states have internal predecessors, (457), 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) [2023-11-28 23:46:35,968 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 23:46:35,968 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:46:35,975 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4bf477-3dfc-4398-a6e3-dcf5ebd05fca/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-28 23:46:36,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4bf477-3dfc-4398-a6e3-dcf5ebd05fca/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:46:36,169 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2023-11-28 23:46:36,169 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:46:36,169 INFO L85 PathProgramCache]: Analyzing trace with hash 1689988626, now seen corresponding path program 3 times [2023-11-28 23:46:36,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:46:36,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480548170] [2023-11-28 23:46:36,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:46:36,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:46:36,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:46:36,254 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:46:36,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:46:36,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480548170] [2023-11-28 23:46:36,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480548170] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 23:46:36,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591027645] [2023-11-28 23:46:36,256 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-28 23:46:36,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:46:36,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4bf477-3dfc-4398-a6e3-dcf5ebd05fca/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:46:36,257 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4bf477-3dfc-4398-a6e3-dcf5ebd05fca/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:46:36,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4bf477-3dfc-4398-a6e3-dcf5ebd05fca/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-28 23:46:36,389 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-28 23:46:36,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 23:46:36,390 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-28 23:46:36,391 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:46:36,487 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:46:36,488 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:46:36,545 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:46:36,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [591027645] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:46:36,546 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 23:46:36,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 11 [2023-11-28 23:46:36,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529372487] [2023-11-28 23:46:36,546 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 23:46:36,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-28 23:46:36,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:46:36,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-28 23:46:36,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2023-11-28 23:46:36,569 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 109 [2023-11-28 23:46:36,569 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 73 transitions, 392 flow. Second operand has 12 states, 12 states have (on average 36.0) internal successors, (432), 12 states have internal predecessors, (432), 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) [2023-11-28 23:46:36,569 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 23:46:36,569 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 109 [2023-11-28 23:46:36,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 23:46:41,517 INFO L124 PetriNetUnfolderBase]: 25676/45097 cut-off events. [2023-11-28 23:46:41,517 INFO L125 PetriNetUnfolderBase]: For 37681/37781 co-relation queries the response was YES. [2023-11-28 23:46:41,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123052 conditions, 45097 events. 25676/45097 cut-off events. For 37681/37781 co-relation queries the response was YES. Maximal size of possible extension queue 1697. Compared 397201 event pairs, 401 based on Foata normal form. 740/45813 useless extension candidates. Maximal degree in co-relation 123031. Up to 13836 conditions per place. [2023-11-28 23:46:41,798 INFO L140 encePairwiseOnDemand]: 101/109 looper letters, 107 selfloop transitions, 31 changer transitions 0/153 dead transitions. [2023-11-28 23:46:41,798 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 153 transitions, 972 flow [2023-11-28 23:46:41,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-28 23:46:41,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-28 23:46:41,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 364 transitions. [2023-11-28 23:46:41,800 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47706422018348627 [2023-11-28 23:46:41,800 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 364 transitions. [2023-11-28 23:46:41,800 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 364 transitions. [2023-11-28 23:46:41,800 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 23:46:41,801 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 364 transitions. [2023-11-28 23:46:41,801 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 52.0) internal successors, (364), 7 states have internal predecessors, (364), 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) [2023-11-28 23:46:41,802 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 109.0) internal successors, (872), 8 states have internal predecessors, (872), 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) [2023-11-28 23:46:41,803 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 109.0) internal successors, (872), 8 states have internal predecessors, (872), 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) [2023-11-28 23:46:41,803 INFO L175 Difference]: Start difference. First operand has 67 places, 73 transitions, 392 flow. Second operand 7 states and 364 transitions. [2023-11-28 23:46:41,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 153 transitions, 972 flow [2023-11-28 23:46:41,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 153 transitions, 905 flow, removed 24 selfloop flow, removed 2 redundant places. [2023-11-28 23:46:41,885 INFO L231 Difference]: Finished difference. Result has 69 places, 71 transitions, 377 flow [2023-11-28 23:46:41,885 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=109, PETRI_DIFFERENCE_MINUEND_FLOW=315, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=377, PETRI_PLACES=69, PETRI_TRANSITIONS=71} [2023-11-28 23:46:41,886 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 3 predicate places. [2023-11-28 23:46:41,886 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 71 transitions, 377 flow [2023-11-28 23:46:41,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 36.0) internal successors, (432), 12 states have internal predecessors, (432), 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) [2023-11-28 23:46:41,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 23:46:41,886 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:46:41,891 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4bf477-3dfc-4398-a6e3-dcf5ebd05fca/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-28 23:46:42,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4bf477-3dfc-4398-a6e3-dcf5ebd05fca/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:46:42,087 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2023-11-28 23:46:42,087 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:46:42,087 INFO L85 PathProgramCache]: Analyzing trace with hash 374006265, now seen corresponding path program 1 times [2023-11-28 23:46:42,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:46:42,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572355241] [2023-11-28 23:46:42,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:46:42,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:46:42,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-28 23:46:42,103 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-28 23:46:42,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-28 23:46:42,117 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-28 23:46:42,117 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-28 23:46:42,117 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (8 of 9 remaining) [2023-11-28 23:46:42,117 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (7 of 9 remaining) [2023-11-28 23:46:42,118 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 9 remaining) [2023-11-28 23:46:42,118 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 9 remaining) [2023-11-28 23:46:42,118 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 9 remaining) [2023-11-28 23:46:42,118 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 9 remaining) [2023-11-28 23:46:42,118 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 9 remaining) [2023-11-28 23:46:42,118 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 9 remaining) [2023-11-28 23:46:42,118 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 9 remaining) [2023-11-28 23:46:42,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-11-28 23:46:42,119 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1] [2023-11-28 23:46:42,119 WARN L233 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-28 23:46:42,119 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2023-11-28 23:46:42,160 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-28 23:46:42,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 135 places, 126 transitions, 392 flow [2023-11-28 23:46:42,171 INFO L124 PetriNetUnfolderBase]: 9/85 cut-off events. [2023-11-28 23:46:42,171 INFO L125 PetriNetUnfolderBase]: For 77/77 co-relation queries the response was YES. [2023-11-28 23:46:42,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 137 conditions, 85 events. 9/85 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 173 event pairs, 0 based on Foata normal form. 0/67 useless extension candidates. Maximal degree in co-relation 122. Up to 8 conditions per place. [2023-11-28 23:46:42,172 INFO L82 GeneralOperation]: Start removeDead. Operand has 135 places, 126 transitions, 392 flow [2023-11-28 23:46:42,173 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 74 places, 65 transitions, 203 flow [2023-11-28 23:46:42,174 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-28 23:46:42,175 INFO L357 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, mHoare=true, 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;@3034b020, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-28 23:46:42,175 INFO L358 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2023-11-28 23:46:42,176 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-28 23:46:42,177 INFO L124 PetriNetUnfolderBase]: 2/16 cut-off events. [2023-11-28 23:46:42,177 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-28 23:46:42,177 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 23:46:42,177 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:46:42,177 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 7 more)] === [2023-11-28 23:46:42,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:46:42,177 INFO L85 PathProgramCache]: Analyzing trace with hash -1563536685, now seen corresponding path program 1 times [2023-11-28 23:46:42,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:46:42,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573511427] [2023-11-28 23:46:42,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:46:42,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:46:42,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:46:42,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:46:42,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:46:42,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573511427] [2023-11-28 23:46:42,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573511427] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:46:42,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:46:42,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-28 23:46:42,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186769857] [2023-11-28 23:46:42,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:46:42,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 23:46:42,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:46:42,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 23:46:42,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 23:46:42,226 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 126 [2023-11-28 23:46:42,226 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 65 transitions, 203 flow. Second operand has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 states have internal predecessors, (136), 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) [2023-11-28 23:46:42,226 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 23:46:42,226 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 126 [2023-11-28 23:46:42,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand