./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-min-max-dec.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a340643f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/weaver/popl20-min-max-dec.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --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 67ced8cbf918778cce3ae5cae291c50696df3950945fdf68713903c29ac269e1 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-a340643-m [2024-01-27 15:41:09,754 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-01-27 15:41:09,811 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-01-27 15:41:09,814 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-01-27 15:41:09,815 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-01-27 15:41:09,828 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-01-27 15:41:09,828 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-01-27 15:41:09,829 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-01-27 15:41:09,829 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-01-27 15:41:09,829 INFO L153 SettingsManager]: * Use memory slicer=true [2024-01-27 15:41:09,830 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-01-27 15:41:09,830 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-01-27 15:41:09,830 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-01-27 15:41:09,831 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-01-27 15:41:09,831 INFO L153 SettingsManager]: * Use SBE=true [2024-01-27 15:41:09,831 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-01-27 15:41:09,831 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-01-27 15:41:09,832 INFO L153 SettingsManager]: * sizeof long=4 [2024-01-27 15:41:09,832 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-01-27 15:41:09,832 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-01-27 15:41:09,833 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-01-27 15:41:09,833 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-01-27 15:41:09,833 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-01-27 15:41:09,834 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-01-27 15:41:09,834 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-01-27 15:41:09,834 INFO L153 SettingsManager]: * sizeof long double=12 [2024-01-27 15:41:09,834 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-01-27 15:41:09,835 INFO L153 SettingsManager]: * Use constant arrays=true [2024-01-27 15:41:09,835 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-01-27 15:41:09,835 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-01-27 15:41:09,835 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-01-27 15:41:09,836 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-01-27 15:41:09,836 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-27 15:41:09,836 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-01-27 15:41:09,837 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-01-27 15:41:09,837 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-01-27 15:41:09,837 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-01-27 15:41:09,837 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-01-27 15:41:09,838 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-01-27 15:41:09,838 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-01-27 15:41:09,838 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-01-27 15:41:09,838 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-01-27 15:41:09,839 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-01-27 15:41:09,839 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:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 67ced8cbf918778cce3ae5cae291c50696df3950945fdf68713903c29ac269e1 [2024-01-27 15:41:10,055 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-01-27 15:41:10,072 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-01-27 15:41:10,074 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-01-27 15:41:10,075 INFO L270 PluginConnector]: Initializing CDTParser... [2024-01-27 15:41:10,076 INFO L274 PluginConnector]: CDTParser initialized [2024-01-27 15:41:10,076 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-min-max-dec.wvr.c [2024-01-27 15:41:11,072 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-01-27 15:41:11,248 INFO L384 CDTParser]: Found 1 translation units. [2024-01-27 15:41:11,249 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-min-max-dec.wvr.c [2024-01-27 15:41:11,258 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/757256401/6ea40ec5739d4f64a49d88539e0fa6c9/FLAGbaabd5675 [2024-01-27 15:41:11,271 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/757256401/6ea40ec5739d4f64a49d88539e0fa6c9 [2024-01-27 15:41:11,274 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-01-27 15:41:11,277 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-01-27 15:41:11,278 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-01-27 15:41:11,279 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-01-27 15:41:11,282 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-01-27 15:41:11,283 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 03:41:11" (1/1) ... [2024-01-27 15:41:11,285 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c8de94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:41:11, skipping insertion in model container [2024-01-27 15:41:11,286 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 03:41:11" (1/1) ... [2024-01-27 15:41:11,308 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-01-27 15:41:11,458 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-min-max-dec.wvr.c[3071,3084] [2024-01-27 15:41:11,464 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-27 15:41:11,471 INFO L202 MainTranslator]: Completed pre-run [2024-01-27 15:41:11,489 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-min-max-dec.wvr.c[3071,3084] [2024-01-27 15:41:11,491 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-27 15:41:11,502 INFO L206 MainTranslator]: Completed translation [2024-01-27 15:41:11,502 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:41:11 WrapperNode [2024-01-27 15:41:11,503 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-01-27 15:41:11,503 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-01-27 15:41:11,504 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-01-27 15:41:11,504 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-01-27 15:41:11,508 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:41:11" (1/1) ... [2024-01-27 15:41:11,514 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:41:11" (1/1) ... [2024-01-27 15:41:11,530 INFO L138 Inliner]: procedures = 26, calls = 63, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 141 [2024-01-27 15:41:11,531 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-01-27 15:41:11,531 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-01-27 15:41:11,532 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-01-27 15:41:11,532 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-01-27 15:41:11,540 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:41:11" (1/1) ... [2024-01-27 15:41:11,540 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:41:11" (1/1) ... [2024-01-27 15:41:11,543 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:41:11" (1/1) ... [2024-01-27 15:41:11,556 INFO L175 MemorySlicer]: Split 20 memory accesses to 6 slices as follows [2, 2, 10, 2, 2, 2]. 50 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0, 0]. The 6 writes are split as follows [0, 1, 2, 1, 1, 1]. [2024-01-27 15:41:11,556 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:41:11" (1/1) ... [2024-01-27 15:41:11,556 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:41:11" (1/1) ... [2024-01-27 15:41:11,577 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:41:11" (1/1) ... [2024-01-27 15:41:11,580 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:41:11" (1/1) ... [2024-01-27 15:41:11,581 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:41:11" (1/1) ... [2024-01-27 15:41:11,582 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:41:11" (1/1) ... [2024-01-27 15:41:11,584 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-01-27 15:41:11,585 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-01-27 15:41:11,585 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-01-27 15:41:11,585 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-01-27 15:41:11,586 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:41:11" (1/1) ... [2024-01-27 15:41:11,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-27 15:41:11,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:41:11,614 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-01-27 15:41:11,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-01-27 15:41:11,651 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-01-27 15:41:11,651 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-01-27 15:41:11,652 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-01-27 15:41:11,652 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-01-27 15:41:11,652 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-01-27 15:41:11,652 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-01-27 15:41:11,652 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-01-27 15:41:11,653 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2024-01-27 15:41:11,654 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-01-27 15:41:11,654 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-01-27 15:41:11,654 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-01-27 15:41:11,654 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-01-27 15:41:11,654 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-01-27 15:41:11,655 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2024-01-27 15:41:11,655 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-01-27 15:41:11,655 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-01-27 15:41:11,655 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-01-27 15:41:11,656 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-01-27 15:41:11,656 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-01-27 15:41:11,656 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-01-27 15:41:11,657 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2024-01-27 15:41:11,657 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2024-01-27 15:41:11,657 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-01-27 15:41:11,657 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-01-27 15:41:11,658 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-01-27 15:41:11,658 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-01-27 15:41:11,658 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-01-27 15:41:11,658 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2024-01-27 15:41:11,659 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-01-27 15:41:11,659 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-01-27 15:41:11,659 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-01-27 15:41:11,659 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-01-27 15:41:11,659 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-01-27 15:41:11,659 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-01-27 15:41:11,661 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-01-27 15:41:11,786 INFO L244 CfgBuilder]: Building ICFG [2024-01-27 15:41:11,787 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-01-27 15:41:12,060 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-01-27 15:41:12,061 INFO L293 CfgBuilder]: Performing block encoding [2024-01-27 15:41:12,240 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-01-27 15:41:12,241 INFO L320 CfgBuilder]: Removed 4 assume(true) statements. [2024-01-27 15:41:12,241 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 03:41:12 BoogieIcfgContainer [2024-01-27 15:41:12,241 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-01-27 15:41:12,244 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-01-27 15:41:12,244 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-01-27 15:41:12,246 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-01-27 15:41:12,247 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.01 03:41:11" (1/3) ... [2024-01-27 15:41:12,247 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@285bf0b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 03:41:12, skipping insertion in model container [2024-01-27 15:41:12,247 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:41:11" (2/3) ... [2024-01-27 15:41:12,249 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@285bf0b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 03:41:12, skipping insertion in model container [2024-01-27 15:41:12,249 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 03:41:12" (3/3) ... [2024-01-27 15:41:12,250 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-min-max-dec.wvr.c [2024-01-27 15:41:12,255 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2024-01-27 15:41:12,262 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-01-27 15:41:12,262 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-01-27 15:41:12,262 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-01-27 15:41:12,310 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-01-27 15:41:12,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 58 places, 49 transitions, 126 flow [2024-01-27 15:41:12,363 INFO L124 PetriNetUnfolderBase]: 4/45 cut-off events. [2024-01-27 15:41:12,363 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-01-27 15:41:12,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62 conditions, 45 events. 4/45 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 84 event pairs, 0 based on Foata normal form. 0/40 useless extension candidates. Maximal degree in co-relation 37. Up to 2 conditions per place. [2024-01-27 15:41:12,366 INFO L82 GeneralOperation]: Start removeDead. Operand has 58 places, 49 transitions, 126 flow [2024-01-27 15:41:12,368 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 53 places, 44 transitions, 112 flow [2024-01-27 15:41:12,374 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-27 15:41:12,378 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;@70241a67, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-27 15:41:12,378 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-01-27 15:41:12,388 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-27 15:41:12,388 INFO L124 PetriNetUnfolderBase]: 4/43 cut-off events. [2024-01-27 15:41:12,388 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-01-27 15:41:12,389 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:41:12,389 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:41:12,389 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-01-27 15:41:12,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:41:12,393 INFO L85 PathProgramCache]: Analyzing trace with hash -2110549717, now seen corresponding path program 1 times [2024-01-27 15:41:12,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:41:12,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246469092] [2024-01-27 15:41:12,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:41:12,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:41:12,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:41:12,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:41:12,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:41:12,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246469092] [2024-01-27 15:41:12,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246469092] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:41:12,818 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:41:12,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-27 15:41:12,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800203217] [2024-01-27 15:41:12,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:41:12,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-27 15:41:12,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:41:12,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-27 15:41:12,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-01-27 15:41:12,882 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 49 [2024-01-27 15:41:12,884 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 44 transitions, 112 flow. Second operand has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:41:12,884 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:41:12,884 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 49 [2024-01-27 15:41:12,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:41:13,373 INFO L124 PetriNetUnfolderBase]: 3542/5179 cut-off events. [2024-01-27 15:41:13,373 INFO L125 PetriNetUnfolderBase]: For 299/299 co-relation queries the response was YES. [2024-01-27 15:41:13,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10271 conditions, 5179 events. 3542/5179 cut-off events. For 299/299 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 30730 event pairs, 1676 based on Foata normal form. 174/5137 useless extension candidates. Maximal degree in co-relation 9131. Up to 3161 conditions per place. [2024-01-27 15:41:13,399 INFO L140 encePairwiseOnDemand]: 45/49 looper letters, 47 selfloop transitions, 3 changer transitions 0/62 dead transitions. [2024-01-27 15:41:13,399 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 62 transitions, 257 flow [2024-01-27 15:41:13,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-27 15:41:13,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-27 15:41:13,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 115 transitions. [2024-01-27 15:41:13,408 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5867346938775511 [2024-01-27 15:41:13,409 INFO L175 Difference]: Start difference. First operand has 53 places, 44 transitions, 112 flow. Second operand 4 states and 115 transitions. [2024-01-27 15:41:13,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 62 transitions, 257 flow [2024-01-27 15:41:13,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 62 transitions, 235 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-01-27 15:41:13,416 INFO L231 Difference]: Finished difference. Result has 49 places, 45 transitions, 110 flow [2024-01-27 15:41:13,417 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=110, PETRI_PLACES=49, PETRI_TRANSITIONS=45} [2024-01-27 15:41:13,420 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, -4 predicate places. [2024-01-27 15:41:13,420 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 45 transitions, 110 flow [2024-01-27 15:41:13,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:41:13,420 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:41:13,420 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:41:13,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-01-27 15:41:13,421 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-01-27 15:41:13,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:41:13,421 INFO L85 PathProgramCache]: Analyzing trace with hash -2060181120, now seen corresponding path program 1 times [2024-01-27 15:41:13,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:41:13,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639747810] [2024-01-27 15:41:13,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:41:13,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:41:13,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:41:13,497 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:41:13,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:41:13,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639747810] [2024-01-27 15:41:13,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639747810] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:41:13,498 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:41:13,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-27 15:41:13,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339578146] [2024-01-27 15:41:13,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:41:13,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-27 15:41:13,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:41:13,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-27 15:41:13,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-01-27 15:41:13,507 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 49 [2024-01-27 15:41:13,508 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 45 transitions, 110 flow. Second operand has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:41:13,508 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:41:13,508 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 49 [2024-01-27 15:41:13,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:41:14,016 INFO L124 PetriNetUnfolderBase]: 4551/6666 cut-off events. [2024-01-27 15:41:14,016 INFO L125 PetriNetUnfolderBase]: For 1168/1168 co-relation queries the response was YES. [2024-01-27 15:41:14,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14137 conditions, 6666 events. 4551/6666 cut-off events. For 1168/1168 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 39310 event pairs, 2562 based on Foata normal form. 192/6676 useless extension candidates. Maximal degree in co-relation 2151. Up to 4460 conditions per place. [2024-01-27 15:41:14,042 INFO L140 encePairwiseOnDemand]: 45/49 looper letters, 50 selfloop transitions, 3 changer transitions 0/64 dead transitions. [2024-01-27 15:41:14,042 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 64 transitions, 267 flow [2024-01-27 15:41:14,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-27 15:41:14,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-27 15:41:14,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 112 transitions. [2024-01-27 15:41:14,044 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-01-27 15:41:14,044 INFO L175 Difference]: Start difference. First operand has 49 places, 45 transitions, 110 flow. Second operand 4 states and 112 transitions. [2024-01-27 15:41:14,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 64 transitions, 267 flow [2024-01-27 15:41:14,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 64 transitions, 261 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-27 15:41:14,048 INFO L231 Difference]: Finished difference. Result has 51 places, 46 transitions, 120 flow [2024-01-27 15:41:14,048 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=120, PETRI_PLACES=51, PETRI_TRANSITIONS=46} [2024-01-27 15:41:14,049 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, -2 predicate places. [2024-01-27 15:41:14,049 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 46 transitions, 120 flow [2024-01-27 15:41:14,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:41:14,049 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:41:14,049 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:41:14,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-01-27 15:41:14,050 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-01-27 15:41:14,050 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:41:14,050 INFO L85 PathProgramCache]: Analyzing trace with hash 649085594, now seen corresponding path program 1 times [2024-01-27 15:41:14,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:41:14,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391966610] [2024-01-27 15:41:14,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:41:14,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:41:14,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:41:14,116 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:41:14,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:41:14,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391966610] [2024-01-27 15:41:14,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391966610] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:41:14,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:41:14,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-27 15:41:14,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506739769] [2024-01-27 15:41:14,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:41:14,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-27 15:41:14,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:41:14,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-27 15:41:14,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-01-27 15:41:14,124 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 49 [2024-01-27 15:41:14,124 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 46 transitions, 120 flow. Second operand has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:41:14,124 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:41:14,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 49 [2024-01-27 15:41:14,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:41:14,652 INFO L124 PetriNetUnfolderBase]: 5176/7548 cut-off events. [2024-01-27 15:41:14,652 INFO L125 PetriNetUnfolderBase]: For 1544/1809 co-relation queries the response was YES. [2024-01-27 15:41:14,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17048 conditions, 7548 events. 5176/7548 cut-off events. For 1544/1809 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 44791 event pairs, 3063 based on Foata normal form. 517/7937 useless extension candidates. Maximal degree in co-relation 4322. Up to 5016 conditions per place. [2024-01-27 15:41:14,687 INFO L140 encePairwiseOnDemand]: 45/49 looper letters, 52 selfloop transitions, 3 changer transitions 0/66 dead transitions. [2024-01-27 15:41:14,687 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 66 transitions, 288 flow [2024-01-27 15:41:14,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-27 15:41:14,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-27 15:41:14,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 112 transitions. [2024-01-27 15:41:14,689 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-01-27 15:41:14,689 INFO L175 Difference]: Start difference. First operand has 51 places, 46 transitions, 120 flow. Second operand 4 states and 112 transitions. [2024-01-27 15:41:14,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 66 transitions, 288 flow [2024-01-27 15:41:14,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 66 transitions, 283 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-27 15:41:14,691 INFO L231 Difference]: Finished difference. Result has 53 places, 47 transitions, 130 flow [2024-01-27 15:41:14,692 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=130, PETRI_PLACES=53, PETRI_TRANSITIONS=47} [2024-01-27 15:41:14,692 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 0 predicate places. [2024-01-27 15:41:14,692 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 47 transitions, 130 flow [2024-01-27 15:41:14,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:41:14,693 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:41:14,693 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:41:14,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-01-27 15:41:14,693 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-01-27 15:41:14,694 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:41:14,694 INFO L85 PathProgramCache]: Analyzing trace with hash 625032986, now seen corresponding path program 1 times [2024-01-27 15:41:14,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:41:14,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178622653] [2024-01-27 15:41:14,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:41:14,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:41:14,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:41:14,775 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:41:14,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:41:14,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178622653] [2024-01-27 15:41:14,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178622653] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:41:14,776 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:41:14,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-27 15:41:14,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827098480] [2024-01-27 15:41:14,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:41:14,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-27 15:41:14,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:41:14,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-27 15:41:14,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-27 15:41:14,778 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 49 [2024-01-27 15:41:14,778 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 47 transitions, 130 flow. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:41:14,778 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:41:14,779 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 49 [2024-01-27 15:41:14,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:41:15,266 INFO L124 PetriNetUnfolderBase]: 4444/6470 cut-off events. [2024-01-27 15:41:15,266 INFO L125 PetriNetUnfolderBase]: For 1676/2144 co-relation queries the response was YES. [2024-01-27 15:41:15,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15415 conditions, 6470 events. 4444/6470 cut-off events. For 1676/2144 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 38202 event pairs, 3717 based on Foata normal form. 468/6823 useless extension candidates. Maximal degree in co-relation 4297. Up to 6001 conditions per place. [2024-01-27 15:41:15,303 INFO L140 encePairwiseOnDemand]: 46/49 looper letters, 34 selfloop transitions, 2 changer transitions 0/48 dead transitions. [2024-01-27 15:41:15,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 48 transitions, 204 flow [2024-01-27 15:41:15,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-27 15:41:15,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-27 15:41:15,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 82 transitions. [2024-01-27 15:41:15,306 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5578231292517006 [2024-01-27 15:41:15,306 INFO L175 Difference]: Start difference. First operand has 53 places, 47 transitions, 130 flow. Second operand 3 states and 82 transitions. [2024-01-27 15:41:15,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 48 transitions, 204 flow [2024-01-27 15:41:15,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 48 transitions, 200 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-27 15:41:15,309 INFO L231 Difference]: Finished difference. Result has 54 places, 48 transitions, 138 flow [2024-01-27 15:41:15,310 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=138, PETRI_PLACES=54, PETRI_TRANSITIONS=48} [2024-01-27 15:41:15,311 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 1 predicate places. [2024-01-27 15:41:15,311 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 48 transitions, 138 flow [2024-01-27 15:41:15,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:41:15,311 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:41:15,312 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:41:15,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-01-27 15:41:15,312 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-01-27 15:41:15,313 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:41:15,313 INFO L85 PathProgramCache]: Analyzing trace with hash -1092804233, now seen corresponding path program 1 times [2024-01-27 15:41:15,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:41:15,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684355174] [2024-01-27 15:41:15,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:41:15,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:41:15,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:41:15,776 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:41:15,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:41:15,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684355174] [2024-01-27 15:41:15,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684355174] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:41:15,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521689536] [2024-01-27 15:41:15,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:41:15,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:41:15,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:41:15,784 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:41:15,786 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-01-27 15:41:15,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:41:15,906 INFO L262 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 25 conjunts are in the unsatisfiable core [2024-01-27 15:41:15,911 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:41:15,948 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-01-27 15:41:16,078 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-01-27 15:41:16,117 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:41:16,117 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:41:16,407 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:41:16,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521689536] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:41:16,407 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:41:16,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 11, 8] total 22 [2024-01-27 15:41:16,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886538785] [2024-01-27 15:41:16,408 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:41:16,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-01-27 15:41:16,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:41:16,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-01-27 15:41:16,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2024-01-27 15:41:16,458 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-01-27 15:41:16,458 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 48 transitions, 138 flow. Second operand has 22 states, 22 states have (on average 17.59090909090909) internal successors, (387), 22 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:41:16,458 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:41:16,459 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-01-27 15:41:16,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:41:27,232 INFO L124 PetriNetUnfolderBase]: 101431/145937 cut-off events. [2024-01-27 15:41:27,233 INFO L125 PetriNetUnfolderBase]: For 46206/46206 co-relation queries the response was YES. [2024-01-27 15:41:27,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 345372 conditions, 145937 events. 101431/145937 cut-off events. For 46206/46206 co-relation queries the response was YES. Maximal size of possible extension queue 5331. Compared 1138242 event pairs, 2521 based on Foata normal form. 21/145951 useless extension candidates. Maximal degree in co-relation 345358. Up to 21237 conditions per place. [2024-01-27 15:41:27,834 INFO L140 encePairwiseOnDemand]: 35/49 looper letters, 682 selfloop transitions, 118 changer transitions 803/1612 dead transitions. [2024-01-27 15:41:27,835 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 1612 transitions, 7991 flow [2024-01-27 15:41:27,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2024-01-27 15:41:27,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2024-01-27 15:41:27,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 2650 transitions. [2024-01-27 15:41:27,843 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6145640074211502 [2024-01-27 15:41:27,843 INFO L175 Difference]: Start difference. First operand has 54 places, 48 transitions, 138 flow. Second operand 88 states and 2650 transitions. [2024-01-27 15:41:27,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 1612 transitions, 7991 flow [2024-01-27 15:41:28,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 1612 transitions, 7987 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-01-27 15:41:28,677 INFO L231 Difference]: Finished difference. Result has 213 places, 189 transitions, 1192 flow [2024-01-27 15:41:28,678 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=88, PETRI_FLOW=1192, PETRI_PLACES=213, PETRI_TRANSITIONS=189} [2024-01-27 15:41:28,678 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 160 predicate places. [2024-01-27 15:41:28,678 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 189 transitions, 1192 flow [2024-01-27 15:41:28,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 17.59090909090909) internal successors, (387), 22 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:41:28,679 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:41:28,679 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:41:28,690 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-01-27 15:41:28,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:41:28,891 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-01-27 15:41:28,891 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:41:28,891 INFO L85 PathProgramCache]: Analyzing trace with hash -533370851, now seen corresponding path program 2 times [2024-01-27 15:41:28,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:41:28,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070419967] [2024-01-27 15:41:28,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:41:28,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:41:28,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:41:29,070 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-01-27 15:41:29,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:41:29,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070419967] [2024-01-27 15:41:29,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070419967] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:41:29,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:41:29,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-27 15:41:29,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804225092] [2024-01-27 15:41:29,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:41:29,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-27 15:41:29,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:41:29,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-27 15:41:29,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-27 15:41:29,079 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 49 [2024-01-27 15:41:29,080 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 189 transitions, 1192 flow. Second operand has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:41:29,080 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:41:29,080 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 49 [2024-01-27 15:41:29,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:41:45,522 INFO L124 PetriNetUnfolderBase]: 79216/119075 cut-off events. [2024-01-27 15:41:45,523 INFO L125 PetriNetUnfolderBase]: For 3423505/3425413 co-relation queries the response was YES. [2024-01-27 15:41:47,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 606646 conditions, 119075 events. 79216/119075 cut-off events. For 3423505/3425413 co-relation queries the response was YES. Maximal size of possible extension queue 4168. Compared 981836 event pairs, 14335 based on Foata normal form. 1395/120028 useless extension candidates. Maximal degree in co-relation 606552. Up to 55962 conditions per place. [2024-01-27 15:41:47,449 INFO L140 encePairwiseOnDemand]: 45/49 looper letters, 164 selfloop transitions, 4 changer transitions 313/504 dead transitions. [2024-01-27 15:41:47,449 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 504 transitions, 3912 flow [2024-01-27 15:41:47,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-27 15:41:47,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-27 15:41:47,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 155 transitions. [2024-01-27 15:41:47,452 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6326530612244898 [2024-01-27 15:41:47,452 INFO L175 Difference]: Start difference. First operand has 213 places, 189 transitions, 1192 flow. Second operand 5 states and 155 transitions. [2024-01-27 15:41:47,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 504 transitions, 3912 flow [2024-01-27 15:42:34,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 504 transitions, 3726 flow, removed 57 selfloop flow, removed 37 redundant places. [2024-01-27 15:42:34,980 INFO L231 Difference]: Finished difference. Result has 140 places, 127 transitions, 763 flow [2024-01-27 15:42:34,980 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1073, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=763, PETRI_PLACES=140, PETRI_TRANSITIONS=127} [2024-01-27 15:42:34,981 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 87 predicate places. [2024-01-27 15:42:34,981 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 127 transitions, 763 flow [2024-01-27 15:42:34,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:42:34,981 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:42:34,981 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:42:34,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-01-27 15:42:34,982 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-01-27 15:42:34,982 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:42:34,982 INFO L85 PathProgramCache]: Analyzing trace with hash -1067476621, now seen corresponding path program 3 times [2024-01-27 15:42:34,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:42:34,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303493230] [2024-01-27 15:42:34,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:42:34,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:42:35,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:42:35,168 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-27 15:42:35,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:42:35,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303493230] [2024-01-27 15:42:35,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303493230] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:42:35,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502388061] [2024-01-27 15:42:35,168 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:42:35,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:42:35,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:42:35,185 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:42:35,185 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-01-27 15:42:35,311 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-01-27 15:42:35,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:42:35,312 INFO L262 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 6 conjunts are in the unsatisfiable core [2024-01-27 15:42:35,315 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:42:35,358 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:42:35,358 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 38 [2024-01-27 15:42:35,398 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-27 15:42:35,399 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:42:35,587 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-27 15:42:35,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502388061] provided 1 perfect and 1 imperfect interpolant sequences [2024-01-27 15:42:35,587 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-01-27 15:42:35,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 14 [2024-01-27 15:42:35,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171375169] [2024-01-27 15:42:35,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:42:35,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-01-27 15:42:35,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:42:35,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-01-27 15:42:35,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2024-01-27 15:42:35,590 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 49 [2024-01-27 15:42:35,591 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 127 transitions, 763 flow. Second operand has 6 states, 6 states have (on average 20.5) internal successors, (123), 6 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:42:35,591 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:42:35,591 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 49 [2024-01-27 15:42:35,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand