./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-figure1.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 023d838f Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/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 ../sv-benchmarks/c/weaver/popl20-figure1.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 facd7612076746f2d167aef7303c13ba7b66236eba7a99773acf1e3861338848 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-023d838-m [2024-11-10 10:32:21,167 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-10 10:32:21,244 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-10 10:32:21,252 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-10 10:32:21,253 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-10 10:32:21,279 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-10 10:32:21,280 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-10 10:32:21,280 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-10 10:32:21,281 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-10 10:32:21,282 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-10 10:32:21,282 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-10 10:32:21,283 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-10 10:32:21,283 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-10 10:32:21,284 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-10 10:32:21,285 INFO L153 SettingsManager]: * Use SBE=true [2024-11-10 10:32:21,286 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-10 10:32:21,286 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-10 10:32:21,286 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-10 10:32:21,287 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-10 10:32:21,287 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-10 10:32:21,288 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-10 10:32:21,288 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-10 10:32:21,289 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-10 10:32:21,289 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-10 10:32:21,289 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-10 10:32:21,290 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-10 10:32:21,290 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-10 10:32:21,290 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-10 10:32:21,291 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-10 10:32:21,291 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-10 10:32:21,291 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-10 10:32:21,292 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-10 10:32:21,292 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-10 10:32:21,292 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-10 10:32:21,292 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-10 10:32:21,293 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-10 10:32:21,293 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-10 10:32:21,293 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-10 10:32:21,293 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-10 10:32:21,294 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-10 10:32:21,294 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-10 10:32:21,294 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-10 10:32:21,295 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> facd7612076746f2d167aef7303c13ba7b66236eba7a99773acf1e3861338848 [2024-11-10 10:32:21,557 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-10 10:32:21,585 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-10 10:32:21,589 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-10 10:32:21,590 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-10 10:32:21,591 INFO L274 PluginConnector]: CDTParser initialized [2024-11-10 10:32:21,592 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-figure1.wvr.c [2024-11-10 10:32:23,061 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-10 10:32:23,245 INFO L384 CDTParser]: Found 1 translation units. [2024-11-10 10:32:23,246 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-figure1.wvr.c [2024-11-10 10:32:23,257 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea9e80250/b5ac7b1efd10407e925152ce44908de6/FLAGa9f6348dc [2024-11-10 10:32:23,274 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea9e80250/b5ac7b1efd10407e925152ce44908de6 [2024-11-10 10:32:23,277 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-10 10:32:23,279 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-10 10:32:23,280 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-10 10:32:23,282 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-10 10:32:23,287 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-10 10:32:23,288 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 10:32:23" (1/1) ... [2024-11-10 10:32:23,289 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1523e955 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:32:23, skipping insertion in model container [2024-11-10 10:32:23,289 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 10:32:23" (1/1) ... [2024-11-10 10:32:23,314 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-10 10:32:23,526 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-figure1.wvr.c[1825,1838] [2024-11-10 10:32:23,531 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-10 10:32:23,540 INFO L200 MainTranslator]: Completed pre-run [2024-11-10 10:32:23,557 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-figure1.wvr.c[1825,1838] [2024-11-10 10:32:23,559 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-10 10:32:23,575 INFO L204 MainTranslator]: Completed translation [2024-11-10 10:32:23,576 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:32:23 WrapperNode [2024-11-10 10:32:23,576 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-10 10:32:23,577 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-10 10:32:23,577 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-10 10:32:23,578 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-10 10:32:23,584 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:32:23" (1/1) ... [2024-11-10 10:32:23,591 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:32:23" (1/1) ... [2024-11-10 10:32:23,605 INFO L138 Inliner]: procedures = 18, calls = 10, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 56 [2024-11-10 10:32:23,605 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-10 10:32:23,606 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-10 10:32:23,606 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-10 10:32:23,606 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-10 10:32:23,615 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:32:23" (1/1) ... [2024-11-10 10:32:23,616 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:32:23" (1/1) ... [2024-11-10 10:32:23,617 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:32:23" (1/1) ... [2024-11-10 10:32:23,630 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-11-10 10:32:23,630 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:32:23" (1/1) ... [2024-11-10 10:32:23,630 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:32:23" (1/1) ... [2024-11-10 10:32:23,634 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:32:23" (1/1) ... [2024-11-10 10:32:23,634 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:32:23" (1/1) ... [2024-11-10 10:32:23,635 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:32:23" (1/1) ... [2024-11-10 10:32:23,636 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:32:23" (1/1) ... [2024-11-10 10:32:23,637 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-10 10:32:23,638 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-10 10:32:23,638 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-10 10:32:23,638 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-10 10:32:23,639 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:32:23" (1/1) ... [2024-11-10 10:32:23,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-10 10:32:23,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:32:23,684 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) [2024-11-10 10:32:23,708 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 [2024-11-10 10:32:23,754 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-10 10:32:23,754 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-10 10:32:23,754 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-10 10:32:23,754 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-10 10:32:23,754 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-10 10:32:23,754 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-10 10:32:23,754 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-10 10:32:23,754 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-10 10:32:23,756 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-10 10:32:23,849 INFO L256 CfgBuilder]: Building ICFG [2024-11-10 10:32:23,851 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-10 10:32:24,008 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-10 10:32:24,009 INFO L307 CfgBuilder]: Performing block encoding [2024-11-10 10:32:24,116 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-10 10:32:24,116 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-10 10:32:24,117 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 10.11 10:32:24 BoogieIcfgContainer [2024-11-10 10:32:24,117 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-10 10:32:24,119 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-10 10:32:24,119 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-10 10:32:24,126 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-10 10:32:24,127 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.11 10:32:23" (1/3) ... [2024-11-10 10:32:24,127 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e072f91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 10:32:24, skipping insertion in model container [2024-11-10 10:32:24,127 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:32:23" (2/3) ... [2024-11-10 10:32:24,128 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e072f91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 10:32:24, skipping insertion in model container [2024-11-10 10:32:24,128 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 10.11 10:32:24" (3/3) ... [2024-11-10 10:32:24,129 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-figure1.wvr.c [2024-11-10 10:32:24,146 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-10 10:32:24,146 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-10 10:32:24,146 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-10 10:32:24,184 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-10 10:32:24,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 31 places, 28 transitions, 70 flow [2024-11-10 10:32:24,244 INFO L124 PetriNetUnfolderBase]: 4/26 cut-off events. [2024-11-10 10:32:24,245 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-10 10:32:24,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35 conditions, 26 events. 4/26 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 41 event pairs, 0 based on Foata normal form. 0/21 useless extension candidates. Maximal degree in co-relation 21. Up to 2 conditions per place. [2024-11-10 10:32:24,251 INFO L82 GeneralOperation]: Start removeDead. Operand has 31 places, 28 transitions, 70 flow [2024-11-10 10:32:24,253 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 28 places, 25 transitions, 62 flow [2024-11-10 10:32:24,262 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-10 10:32:24,267 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@637c1412, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-10 10:32:24,268 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-11-10 10:32:24,276 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-10 10:32:24,276 INFO L124 PetriNetUnfolderBase]: 4/24 cut-off events. [2024-11-10 10:32:24,277 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-10 10:32:24,277 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:32:24,278 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:32:24,278 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:32:24,282 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:32:24,283 INFO L85 PathProgramCache]: Analyzing trace with hash -709866742, now seen corresponding path program 1 times [2024-11-10 10:32:24,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:32:24,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876766566] [2024-11-10 10:32:24,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:32:24,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:32:24,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:32:24,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:32:24,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:32:24,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876766566] [2024-11-10 10:32:24,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876766566] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 10:32:24,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 10:32:24,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-10 10:32:24,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278297988] [2024-11-10 10:32:24,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 10:32:24,459 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-10 10:32:24,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:32:24,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-10 10:32:24,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-10 10:32:24,495 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 28 [2024-11-10 10:32:24,498 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 25 transitions, 62 flow. Second operand has 2 states, 2 states have (on average 15.0) internal successors, (30), 2 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:32:24,499 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:32:24,499 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 28 [2024-11-10 10:32:24,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:32:24,631 INFO L124 PetriNetUnfolderBase]: 74/150 cut-off events. [2024-11-10 10:32:24,631 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2024-11-10 10:32:24,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 300 conditions, 150 events. 74/150 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 553 event pairs, 53 based on Foata normal form. 21/165 useless extension candidates. Maximal degree in co-relation 259. Up to 131 conditions per place. [2024-11-10 10:32:24,639 INFO L140 encePairwiseOnDemand]: 26/28 looper letters, 17 selfloop transitions, 0 changer transitions 0/23 dead transitions. [2024-11-10 10:32:24,639 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 23 transitions, 92 flow [2024-11-10 10:32:24,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-10 10:32:24,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-11-10 10:32:24,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 35 transitions. [2024-11-10 10:32:24,649 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-11-10 10:32:24,650 INFO L175 Difference]: Start difference. First operand has 28 places, 25 transitions, 62 flow. Second operand 2 states and 35 transitions. [2024-11-10 10:32:24,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 23 transitions, 92 flow [2024-11-10 10:32:24,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 23 transitions, 84 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-10 10:32:24,654 INFO L231 Difference]: Finished difference. Result has 25 places, 23 transitions, 50 flow [2024-11-10 10:32:24,656 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=50, PETRI_PLACES=25, PETRI_TRANSITIONS=23} [2024-11-10 10:32:24,659 INFO L277 CegarLoopForPetriNet]: 28 programPoint places, -3 predicate places. [2024-11-10 10:32:24,659 INFO L471 AbstractCegarLoop]: Abstraction has has 25 places, 23 transitions, 50 flow [2024-11-10 10:32:24,660 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 15.0) internal successors, (30), 2 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:32:24,660 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:32:24,660 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:32:24,660 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-10 10:32:24,661 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:32:24,661 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:32:24,661 INFO L85 PathProgramCache]: Analyzing trace with hash -143131856, now seen corresponding path program 1 times [2024-11-10 10:32:24,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:32:24,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156162624] [2024-11-10 10:32:24,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:32:24,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:32:24,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:32:24,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:32:24,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:32:24,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156162624] [2024-11-10 10:32:24,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156162624] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 10:32:24,752 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 10:32:24,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-10 10:32:24,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088663067] [2024-11-10 10:32:24,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 10:32:24,754 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-10 10:32:24,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:32:24,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-10 10:32:24,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-10 10:32:24,755 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 28 [2024-11-10 10:32:24,756 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 23 transitions, 50 flow. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:32:24,756 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:32:24,756 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 28 [2024-11-10 10:32:24,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:32:24,846 INFO L124 PetriNetUnfolderBase]: 86/198 cut-off events. [2024-11-10 10:32:24,847 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-10 10:32:24,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 366 conditions, 198 events. 86/198 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 791 event pairs, 32 based on Foata normal form. 8/192 useless extension candidates. Maximal degree in co-relation 363. Up to 108 conditions per place. [2024-11-10 10:32:24,850 INFO L140 encePairwiseOnDemand]: 24/28 looper letters, 21 selfloop transitions, 2 changer transitions 3/32 dead transitions. [2024-11-10 10:32:24,851 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 32 transitions, 123 flow [2024-11-10 10:32:24,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-10 10:32:24,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-10 10:32:24,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 52 transitions. [2024-11-10 10:32:24,852 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-11-10 10:32:24,852 INFO L175 Difference]: Start difference. First operand has 25 places, 23 transitions, 50 flow. Second operand 3 states and 52 transitions. [2024-11-10 10:32:24,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 32 transitions, 123 flow [2024-11-10 10:32:24,853 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 32 transitions, 123 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-10 10:32:24,855 INFO L231 Difference]: Finished difference. Result has 28 places, 24 transitions, 64 flow [2024-11-10 10:32:24,855 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=64, PETRI_PLACES=28, PETRI_TRANSITIONS=24} [2024-11-10 10:32:24,856 INFO L277 CegarLoopForPetriNet]: 28 programPoint places, 0 predicate places. [2024-11-10 10:32:24,856 INFO L471 AbstractCegarLoop]: Abstraction has has 28 places, 24 transitions, 64 flow [2024-11-10 10:32:24,856 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:32:24,856 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:32:24,857 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:32:24,857 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-10 10:32:24,857 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:32:24,858 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:32:24,859 INFO L85 PathProgramCache]: Analyzing trace with hash 1260616708, now seen corresponding path program 1 times [2024-11-10 10:32:24,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:32:24,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730887123] [2024-11-10 10:32:24,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:32:24,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:32:24,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:32:25,018 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:32:25,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:32:25,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730887123] [2024-11-10 10:32:25,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730887123] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 10:32:25,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 10:32:25,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-10 10:32:25,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001551653] [2024-11-10 10:32:25,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 10:32:25,024 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-10 10:32:25,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:32:25,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-10 10:32:25,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-10 10:32:25,040 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-11-10 10:32:25,040 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 24 transitions, 64 flow. Second operand has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:32:25,041 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:32:25,041 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-11-10 10:32:25,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:32:25,215 INFO L124 PetriNetUnfolderBase]: 227/435 cut-off events. [2024-11-10 10:32:25,216 INFO L125 PetriNetUnfolderBase]: For 29/29 co-relation queries the response was YES. [2024-11-10 10:32:25,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 916 conditions, 435 events. 227/435 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1986 event pairs, 91 based on Foata normal form. 0/408 useless extension candidates. Maximal degree in co-relation 911. Up to 257 conditions per place. [2024-11-10 10:32:25,222 INFO L140 encePairwiseOnDemand]: 19/28 looper letters, 38 selfloop transitions, 9 changer transitions 12/62 dead transitions. [2024-11-10 10:32:25,224 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 62 transitions, 273 flow [2024-11-10 10:32:25,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-10 10:32:25,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-10 10:32:25,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 91 transitions. [2024-11-10 10:32:25,227 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2024-11-10 10:32:25,228 INFO L175 Difference]: Start difference. First operand has 28 places, 24 transitions, 64 flow. Second operand 6 states and 91 transitions. [2024-11-10 10:32:25,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 62 transitions, 273 flow [2024-11-10 10:32:25,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 62 transitions, 268 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-10 10:32:25,232 INFO L231 Difference]: Finished difference. Result has 36 places, 32 transitions, 133 flow [2024-11-10 10:32:25,232 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=133, PETRI_PLACES=36, PETRI_TRANSITIONS=32} [2024-11-10 10:32:25,235 INFO L277 CegarLoopForPetriNet]: 28 programPoint places, 8 predicate places. [2024-11-10 10:32:25,235 INFO L471 AbstractCegarLoop]: Abstraction has has 36 places, 32 transitions, 133 flow [2024-11-10 10:32:25,236 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:32:25,236 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:32:25,236 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:32:25,236 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-10 10:32:25,236 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:32:25,237 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:32:25,237 INFO L85 PathProgramCache]: Analyzing trace with hash -1194060656, now seen corresponding path program 2 times [2024-11-10 10:32:25,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:32:25,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537775835] [2024-11-10 10:32:25,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:32:25,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:32:25,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:32:25,413 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:32:25,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:32:25,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537775835] [2024-11-10 10:32:25,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537775835] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:32:25,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699544997] [2024-11-10 10:32:25,416 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-10 10:32:25,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:32:25,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:32:25,419 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) [2024-11-10 10:32:25,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-10 10:32:25,484 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-10 10:32:25,485 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 10:32:25,486 INFO L255 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-10 10:32:25,491 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:32:25,556 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:32:25,557 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:32:25,599 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:32:25,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699544997] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 10:32:25,600 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 10:32:25,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2024-11-10 10:32:25,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990345881] [2024-11-10 10:32:25,601 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 10:32:25,601 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-10 10:32:25,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:32:25,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-10 10:32:25,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-11-10 10:32:25,619 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-11-10 10:32:25,620 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 32 transitions, 133 flow. Second operand has 9 states, 9 states have (on average 7.777777777777778) internal successors, (70), 9 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:32:25,620 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:32:25,620 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-11-10 10:32:25,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:32:25,923 INFO L124 PetriNetUnfolderBase]: 250/477 cut-off events. [2024-11-10 10:32:25,925 INFO L125 PetriNetUnfolderBase]: For 387/387 co-relation queries the response was YES. [2024-11-10 10:32:25,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1382 conditions, 477 events. 250/477 cut-off events. For 387/387 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2154 event pairs, 9 based on Foata normal form. 15/492 useless extension candidates. Maximal degree in co-relation 1373. Up to 112 conditions per place. [2024-11-10 10:32:25,931 INFO L140 encePairwiseOnDemand]: 20/28 looper letters, 65 selfloop transitions, 25 changer transitions 3/96 dead transitions. [2024-11-10 10:32:25,931 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 96 transitions, 562 flow [2024-11-10 10:32:25,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-10 10:32:25,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-10 10:32:25,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 147 transitions. [2024-11-10 10:32:25,934 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-11-10 10:32:25,934 INFO L175 Difference]: Start difference. First operand has 36 places, 32 transitions, 133 flow. Second operand 12 states and 147 transitions. [2024-11-10 10:32:25,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 96 transitions, 562 flow [2024-11-10 10:32:25,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 96 transitions, 560 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-11-10 10:32:25,940 INFO L231 Difference]: Finished difference. Result has 54 places, 49 transitions, 320 flow [2024-11-10 10:32:25,940 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=131, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=320, PETRI_PLACES=54, PETRI_TRANSITIONS=49} [2024-11-10 10:32:25,942 INFO L277 CegarLoopForPetriNet]: 28 programPoint places, 26 predicate places. [2024-11-10 10:32:25,942 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 49 transitions, 320 flow [2024-11-10 10:32:25,943 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.777777777777778) internal successors, (70), 9 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:32:25,943 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:32:25,943 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:32:25,963 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-10 10:32:26,147 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:32:26,148 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:32:26,149 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:32:26,149 INFO L85 PathProgramCache]: Analyzing trace with hash -375299726, now seen corresponding path program 3 times [2024-11-10 10:32:26,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:32:26,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61522788] [2024-11-10 10:32:26,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:32:26,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:32:26,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:32:26,248 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:32:26,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:32:26,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61522788] [2024-11-10 10:32:26,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61522788] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 10:32:26,249 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 10:32:26,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-10 10:32:26,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670141398] [2024-11-10 10:32:26,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 10:32:26,250 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-10 10:32:26,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:32:26,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-10 10:32:26,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-10 10:32:26,258 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 28 [2024-11-10 10:32:26,258 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 49 transitions, 320 flow. Second operand has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 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) [2024-11-10 10:32:26,258 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:32:26,258 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 28 [2024-11-10 10:32:26,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:32:26,439 INFO L124 PetriNetUnfolderBase]: 314/606 cut-off events. [2024-11-10 10:32:26,439 INFO L125 PetriNetUnfolderBase]: For 1498/1502 co-relation queries the response was YES. [2024-11-10 10:32:26,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2169 conditions, 606 events. 314/606 cut-off events. For 1498/1502 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2789 event pairs, 95 based on Foata normal form. 4/605 useless extension candidates. Maximal degree in co-relation 2152. Up to 229 conditions per place. [2024-11-10 10:32:26,446 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 70 selfloop transitions, 16 changer transitions 5/95 dead transitions. [2024-11-10 10:32:26,447 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 95 transitions, 772 flow [2024-11-10 10:32:26,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-10 10:32:26,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-10 10:32:26,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 94 transitions. [2024-11-10 10:32:26,451 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.47959183673469385 [2024-11-10 10:32:26,451 INFO L175 Difference]: Start difference. First operand has 54 places, 49 transitions, 320 flow. Second operand 7 states and 94 transitions. [2024-11-10 10:32:26,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 95 transitions, 772 flow [2024-11-10 10:32:26,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 95 transitions, 754 flow, removed 9 selfloop flow, removed 0 redundant places. [2024-11-10 10:32:26,466 INFO L231 Difference]: Finished difference. Result has 65 places, 54 transitions, 409 flow [2024-11-10 10:32:26,466 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=306, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=409, PETRI_PLACES=65, PETRI_TRANSITIONS=54} [2024-11-10 10:32:26,467 INFO L277 CegarLoopForPetriNet]: 28 programPoint places, 37 predicate places. [2024-11-10 10:32:26,467 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 54 transitions, 409 flow [2024-11-10 10:32:26,467 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 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) [2024-11-10 10:32:26,467 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:32:26,468 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:32:26,468 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-10 10:32:26,468 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:32:26,469 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:32:26,469 INFO L85 PathProgramCache]: Analyzing trace with hash 651851792, now seen corresponding path program 4 times [2024-11-10 10:32:26,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:32:26,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303745634] [2024-11-10 10:32:26,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:32:26,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:32:26,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:32:26,550 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:32:26,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:32:26,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303745634] [2024-11-10 10:32:26,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303745634] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:32:26,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054872257] [2024-11-10 10:32:26,553 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-10 10:32:26,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:32:26,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:32:26,555 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) [2024-11-10 10:32:26,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-10 10:32:26,607 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-10 10:32:26,607 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 10:32:26,608 INFO L255 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-10 10:32:26,609 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:32:26,686 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:32:26,686 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:32:26,728 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:32:26,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054872257] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 10:32:26,728 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 10:32:26,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2024-11-10 10:32:26,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411943791] [2024-11-10 10:32:26,729 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 10:32:26,729 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-10 10:32:26,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:32:26,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-10 10:32:26,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2024-11-10 10:32:26,734 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-11-10 10:32:26,734 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 54 transitions, 409 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:32:26,734 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:32:26,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-11-10 10:32:26,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:32:27,080 INFO L124 PetriNetUnfolderBase]: 469/870 cut-off events. [2024-11-10 10:32:27,081 INFO L125 PetriNetUnfolderBase]: For 2974/2978 co-relation queries the response was YES. [2024-11-10 10:32:27,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3358 conditions, 870 events. 469/870 cut-off events. For 2974/2978 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 4320 event pairs, 35 based on Foata normal form. 15/885 useless extension candidates. Maximal degree in co-relation 3335. Up to 200 conditions per place. [2024-11-10 10:32:27,108 INFO L140 encePairwiseOnDemand]: 18/28 looper letters, 83 selfloop transitions, 47 changer transitions 4/137 dead transitions. [2024-11-10 10:32:27,109 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 137 transitions, 1145 flow [2024-11-10 10:32:27,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-10 10:32:27,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-11-10 10:32:27,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 196 transitions. [2024-11-10 10:32:27,110 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-11-10 10:32:27,110 INFO L175 Difference]: Start difference. First operand has 65 places, 54 transitions, 409 flow. Second operand 16 states and 196 transitions. [2024-11-10 10:32:27,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 137 transitions, 1145 flow [2024-11-10 10:32:27,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 137 transitions, 1100 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-11-10 10:32:27,118 INFO L231 Difference]: Finished difference. Result has 84 places, 76 transitions, 754 flow [2024-11-10 10:32:27,118 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=369, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=754, PETRI_PLACES=84, PETRI_TRANSITIONS=76} [2024-11-10 10:32:27,119 INFO L277 CegarLoopForPetriNet]: 28 programPoint places, 56 predicate places. [2024-11-10 10:32:27,119 INFO L471 AbstractCegarLoop]: Abstraction has has 84 places, 76 transitions, 754 flow [2024-11-10 10:32:27,119 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:32:27,119 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:32:27,119 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:32:27,137 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-10 10:32:27,323 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-10 10:32:27,324 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:32:27,324 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:32:27,324 INFO L85 PathProgramCache]: Analyzing trace with hash -2096563180, now seen corresponding path program 5 times [2024-11-10 10:32:27,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:32:27,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322838211] [2024-11-10 10:32:27,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:32:27,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:32:27,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:32:27,417 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:32:27,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:32:27,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322838211] [2024-11-10 10:32:27,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322838211] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:32:27,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097961302] [2024-11-10 10:32:27,418 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-10 10:32:27,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:32:27,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:32:27,420 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 10:32:27,421 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-10 10:32:27,470 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-10 10:32:27,471 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 10:32:27,471 INFO L255 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-10 10:32:27,473 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:32:27,538 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:32:27,539 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:32:27,584 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:32:27,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097961302] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 10:32:27,584 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 10:32:27,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2024-11-10 10:32:27,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552288892] [2024-11-10 10:32:27,584 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 10:32:27,585 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-10 10:32:27,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:32:27,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-10 10:32:27,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2024-11-10 10:32:27,601 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-11-10 10:32:27,601 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 76 transitions, 754 flow. Second operand has 11 states, 11 states have (on average 7.909090909090909) internal successors, (87), 11 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:32:27,601 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:32:27,601 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-11-10 10:32:27,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:32:27,856 INFO L124 PetriNetUnfolderBase]: 466/867 cut-off events. [2024-11-10 10:32:27,856 INFO L125 PetriNetUnfolderBase]: For 5000/5000 co-relation queries the response was YES. [2024-11-10 10:32:27,860 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3805 conditions, 867 events. 466/867 cut-off events. For 5000/5000 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 4235 event pairs, 98 based on Foata normal form. 15/881 useless extension candidates. Maximal degree in co-relation 3776. Up to 283 conditions per place. [2024-11-10 10:32:27,865 INFO L140 encePairwiseOnDemand]: 18/28 looper letters, 70 selfloop transitions, 56 changer transitions 2/131 dead transitions. [2024-11-10 10:32:27,865 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 131 transitions, 1428 flow [2024-11-10 10:32:27,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-10 10:32:27,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-10 10:32:27,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 122 transitions. [2024-11-10 10:32:27,866 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.48412698412698413 [2024-11-10 10:32:27,866 INFO L175 Difference]: Start difference. First operand has 84 places, 76 transitions, 754 flow. Second operand 9 states and 122 transitions. [2024-11-10 10:32:27,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 131 transitions, 1428 flow [2024-11-10 10:32:27,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 131 transitions, 1294 flow, removed 45 selfloop flow, removed 4 redundant places. [2024-11-10 10:32:27,884 INFO L231 Difference]: Finished difference. Result has 93 places, 98 transitions, 1122 flow [2024-11-10 10:32:27,884 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=644, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1122, PETRI_PLACES=93, PETRI_TRANSITIONS=98} [2024-11-10 10:32:27,885 INFO L277 CegarLoopForPetriNet]: 28 programPoint places, 65 predicate places. [2024-11-10 10:32:27,886 INFO L471 AbstractCegarLoop]: Abstraction has has 93 places, 98 transitions, 1122 flow [2024-11-10 10:32:27,886 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.909090909090909) internal successors, (87), 11 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:32:27,886 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:32:27,886 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:32:27,904 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-10 10:32:28,086 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:32:28,087 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:32:28,088 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:32:28,088 INFO L85 PathProgramCache]: Analyzing trace with hash -2077332804, now seen corresponding path program 6 times [2024-11-10 10:32:28,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:32:28,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434138010] [2024-11-10 10:32:28,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:32:28,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:32:28,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:32:28,140 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:32:28,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:32:28,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434138010] [2024-11-10 10:32:28,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434138010] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 10:32:28,140 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 10:32:28,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-10 10:32:28,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403553171] [2024-11-10 10:32:28,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 10:32:28,141 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-10 10:32:28,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:32:28,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-10 10:32:28,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-10 10:32:28,158 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-11-10 10:32:28,158 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 98 transitions, 1122 flow. Second operand has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:32:28,158 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:32:28,158 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-11-10 10:32:28,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:32:28,332 INFO L124 PetriNetUnfolderBase]: 432/791 cut-off events. [2024-11-10 10:32:28,332 INFO L125 PetriNetUnfolderBase]: For 5428/5428 co-relation queries the response was YES. [2024-11-10 10:32:28,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3778 conditions, 791 events. 432/791 cut-off events. For 5428/5428 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 3710 event pairs, 141 based on Foata normal form. 4/794 useless extension candidates. Maximal degree in co-relation 3744. Up to 419 conditions per place. [2024-11-10 10:32:28,339 INFO L140 encePairwiseOnDemand]: 21/28 looper letters, 75 selfloop transitions, 26 changer transitions 5/109 dead transitions. [2024-11-10 10:32:28,339 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 109 transitions, 1373 flow [2024-11-10 10:32:28,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-10 10:32:28,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-10 10:32:28,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 75 transitions. [2024-11-10 10:32:28,341 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-11-10 10:32:28,341 INFO L175 Difference]: Start difference. First operand has 93 places, 98 transitions, 1122 flow. Second operand 6 states and 75 transitions. [2024-11-10 10:32:28,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 109 transitions, 1373 flow [2024-11-10 10:32:28,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 109 transitions, 1315 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-11-10 10:32:28,358 INFO L231 Difference]: Finished difference. Result has 97 places, 93 transitions, 1053 flow [2024-11-10 10:32:28,358 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=1028, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1053, PETRI_PLACES=97, PETRI_TRANSITIONS=93} [2024-11-10 10:32:28,362 INFO L277 CegarLoopForPetriNet]: 28 programPoint places, 69 predicate places. [2024-11-10 10:32:28,362 INFO L471 AbstractCegarLoop]: Abstraction has has 97 places, 93 transitions, 1053 flow [2024-11-10 10:32:28,362 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:32:28,362 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:32:28,362 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:32:28,362 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-10 10:32:28,363 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:32:28,363 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:32:28,363 INFO L85 PathProgramCache]: Analyzing trace with hash 1890462148, now seen corresponding path program 1 times [2024-11-10 10:32:28,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:32:28,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221378191] [2024-11-10 10:32:28,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:32:28,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:32:28,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:32:28,457 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 10:32:28,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:32:28,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221378191] [2024-11-10 10:32:28,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221378191] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:32:28,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9633263] [2024-11-10 10:32:28,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:32:28,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:32:28,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:32:28,461 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 10:32:28,463 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-10 10:32:28,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:32:28,515 INFO L255 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-10 10:32:28,516 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:32:28,566 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:32:28,566 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-10 10:32:28,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9633263] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 10:32:28,566 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-10 10:32:28,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [3] total 5 [2024-11-10 10:32:28,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454130816] [2024-11-10 10:32:28,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 10:32:28,567 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-10 10:32:28,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:32:28,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-10 10:32:28,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-10 10:32:28,568 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 28 [2024-11-10 10:32:28,568 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 93 transitions, 1053 flow. Second operand has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 6 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:32:28,568 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:32:28,568 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 28 [2024-11-10 10:32:28,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:32:28,760 INFO L124 PetriNetUnfolderBase]: 614/1234 cut-off events. [2024-11-10 10:32:28,760 INFO L125 PetriNetUnfolderBase]: For 9192/9229 co-relation queries the response was YES. [2024-11-10 10:32:28,765 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5900 conditions, 1234 events. 614/1234 cut-off events. For 9192/9229 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 7012 event pairs, 90 based on Foata normal form. 26/1225 useless extension candidates. Maximal degree in co-relation 5866. Up to 484 conditions per place. [2024-11-10 10:32:28,772 INFO L140 encePairwiseOnDemand]: 23/28 looper letters, 161 selfloop transitions, 5 changer transitions 2/182 dead transitions. [2024-11-10 10:32:28,773 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 182 transitions, 2470 flow [2024-11-10 10:32:28,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-10 10:32:28,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-10 10:32:28,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 76 transitions. [2024-11-10 10:32:28,774 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6785714285714286 [2024-11-10 10:32:28,774 INFO L175 Difference]: Start difference. First operand has 97 places, 93 transitions, 1053 flow. Second operand 4 states and 76 transitions. [2024-11-10 10:32:28,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 182 transitions, 2470 flow [2024-11-10 10:32:28,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 182 transitions, 2179 flow, removed 8 selfloop flow, removed 11 redundant places. [2024-11-10 10:32:28,802 INFO L231 Difference]: Finished difference. Result has 87 places, 93 transitions, 927 flow [2024-11-10 10:32:28,802 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=889, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=927, PETRI_PLACES=87, PETRI_TRANSITIONS=93} [2024-11-10 10:32:28,803 INFO L277 CegarLoopForPetriNet]: 28 programPoint places, 59 predicate places. [2024-11-10 10:32:28,803 INFO L471 AbstractCegarLoop]: Abstraction has has 87 places, 93 transitions, 927 flow [2024-11-10 10:32:28,803 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 6 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:32:28,803 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:32:28,803 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:32:28,821 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-10 10:32:29,004 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:32:29,004 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:32:29,005 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:32:29,005 INFO L85 PathProgramCache]: Analyzing trace with hash -1798190042, now seen corresponding path program 2 times [2024-11-10 10:32:29,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:32:29,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764207630] [2024-11-10 10:32:29,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:32:29,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:32:29,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:32:29,081 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:32:29,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:32:29,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764207630] [2024-11-10 10:32:29,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764207630] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:32:29,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234097920] [2024-11-10 10:32:29,082 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-10 10:32:29,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:32:29,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:32:29,084 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 10:32:29,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-10 10:32:29,133 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-10 10:32:29,133 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 10:32:29,134 INFO L255 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-10 10:32:29,135 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:32:29,248 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:32:29,248 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:32:29,324 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:32:29,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234097920] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 10:32:29,324 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 10:32:29,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-11-10 10:32:29,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031749981] [2024-11-10 10:32:29,324 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 10:32:29,325 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-10 10:32:29,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:32:29,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-10 10:32:29,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2024-11-10 10:32:29,349 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-11-10 10:32:29,349 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 93 transitions, 927 flow. Second operand has 15 states, 15 states have (on average 8.133333333333333) internal successors, (122), 15 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:32:29,349 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:32:29,349 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-11-10 10:32:29,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:32:30,271 INFO L124 PetriNetUnfolderBase]: 1604/2889 cut-off events. [2024-11-10 10:32:30,271 INFO L125 PetriNetUnfolderBase]: For 15652/15652 co-relation queries the response was YES. [2024-11-10 10:32:30,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13478 conditions, 2889 events. 1604/2889 cut-off events. For 15652/15652 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 17249 event pairs, 70 based on Foata normal form. 90/2979 useless extension candidates. Maximal degree in co-relation 13449. Up to 489 conditions per place. [2024-11-10 10:32:30,295 INFO L140 encePairwiseOnDemand]: 18/28 looper letters, 172 selfloop transitions, 134 changer transitions 19/328 dead transitions. [2024-11-10 10:32:30,295 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 328 transitions, 3440 flow [2024-11-10 10:32:30,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-11-10 10:32:30,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2024-11-10 10:32:30,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 372 transitions. [2024-11-10 10:32:30,298 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.44285714285714284 [2024-11-10 10:32:30,298 INFO L175 Difference]: Start difference. First operand has 87 places, 93 transitions, 927 flow. Second operand 30 states and 372 transitions. [2024-11-10 10:32:30,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 328 transitions, 3440 flow [2024-11-10 10:32:30,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 328 transitions, 3440 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-10 10:32:30,337 INFO L231 Difference]: Finished difference. Result has 134 places, 172 transitions, 2277 flow [2024-11-10 10:32:30,337 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=927, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=2277, PETRI_PLACES=134, PETRI_TRANSITIONS=172} [2024-11-10 10:32:30,341 INFO L277 CegarLoopForPetriNet]: 28 programPoint places, 106 predicate places. [2024-11-10 10:32:30,341 INFO L471 AbstractCegarLoop]: Abstraction has has 134 places, 172 transitions, 2277 flow [2024-11-10 10:32:30,341 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 8.133333333333333) internal successors, (122), 15 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:32:30,341 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:32:30,341 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:32:30,358 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-10 10:32:30,545 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-10 10:32:30,546 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:32:30,546 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:32:30,546 INFO L85 PathProgramCache]: Analyzing trace with hash -14673226, now seen corresponding path program 3 times [2024-11-10 10:32:30,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:32:30,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54078876] [2024-11-10 10:32:30,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:32:30,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:32:30,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:32:30,617 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:32:30,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:32:30,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54078876] [2024-11-10 10:32:30,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54078876] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:32:30,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081990989] [2024-11-10 10:32:30,618 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-10 10:32:30,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:32:30,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:32:30,620 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 10:32:30,621 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-10 10:32:30,676 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-10 10:32:30,676 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 10:32:30,677 INFO L255 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-10 10:32:30,678 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:32:30,762 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:32:30,762 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:32:30,809 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:32:30,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081990989] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 10:32:30,810 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 10:32:30,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-11-10 10:32:30,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853032314] [2024-11-10 10:32:30,810 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 10:32:30,811 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-10 10:32:30,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:32:30,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-10 10:32:30,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2024-11-10 10:32:30,823 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-11-10 10:32:30,824 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 172 transitions, 2277 flow. Second operand has 15 states, 15 states have (on average 7.733333333333333) internal successors, (116), 15 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:32:30,824 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:32:30,824 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-11-10 10:32:30,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:32:32,196 INFO L124 PetriNetUnfolderBase]: 2554/4568 cut-off events. [2024-11-10 10:32:32,196 INFO L125 PetriNetUnfolderBase]: For 63350/63350 co-relation queries the response was YES. [2024-11-10 10:32:32,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27739 conditions, 4568 events. 2554/4568 cut-off events. For 63350/63350 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 28894 event pairs, 189 based on Foata normal form. 44/4612 useless extension candidates. Maximal degree in co-relation 27692. Up to 814 conditions per place. [2024-11-10 10:32:32,247 INFO L140 encePairwiseOnDemand]: 18/28 looper letters, 212 selfloop transitions, 213 changer transitions 14/442 dead transitions. [2024-11-10 10:32:32,247 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 442 transitions, 6292 flow [2024-11-10 10:32:32,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-10 10:32:32,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-11-10 10:32:32,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 337 transitions. [2024-11-10 10:32:32,250 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4298469387755102 [2024-11-10 10:32:32,250 INFO L175 Difference]: Start difference. First operand has 134 places, 172 transitions, 2277 flow. Second operand 28 states and 337 transitions. [2024-11-10 10:32:32,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 442 transitions, 6292 flow [2024-11-10 10:32:32,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 442 transitions, 5990 flow, removed 130 selfloop flow, removed 5 redundant places. [2024-11-10 10:32:32,447 INFO L231 Difference]: Finished difference. Result has 173 places, 303 transitions, 4717 flow [2024-11-10 10:32:32,447 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=2084, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=4717, PETRI_PLACES=173, PETRI_TRANSITIONS=303} [2024-11-10 10:32:32,449 INFO L277 CegarLoopForPetriNet]: 28 programPoint places, 145 predicate places. [2024-11-10 10:32:32,449 INFO L471 AbstractCegarLoop]: Abstraction has has 173 places, 303 transitions, 4717 flow [2024-11-10 10:32:32,450 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 7.733333333333333) internal successors, (116), 15 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:32:32,450 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:32:32,450 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:32:32,466 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-10 10:32:32,650 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:32:32,652 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:32:32,652 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:32:32,652 INFO L85 PathProgramCache]: Analyzing trace with hash -793211254, now seen corresponding path program 4 times [2024-11-10 10:32:32,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:32:32,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100152811] [2024-11-10 10:32:32,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:32:32,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:32:32,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:32:32,769 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:32:32,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:32:32,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100152811] [2024-11-10 10:32:32,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100152811] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:32:32,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135515838] [2024-11-10 10:32:32,770 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-10 10:32:32,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:32:32,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:32:32,773 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 10:32:32,774 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-10 10:32:32,824 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-10 10:32:32,825 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 10:32:32,825 INFO L255 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-10 10:32:32,827 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:32:32,914 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:32:32,915 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:32:32,974 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:32:32,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135515838] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 10:32:32,976 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 10:32:32,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2024-11-10 10:32:32,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262570379] [2024-11-10 10:32:32,976 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 10:32:32,977 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-10 10:32:32,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:32:32,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-10 10:32:32,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-11-10 10:32:32,992 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-11-10 10:32:32,993 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 303 transitions, 4717 flow. Second operand has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:32:32,993 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:32:32,993 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-11-10 10:32:32,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:32:34,291 INFO L124 PetriNetUnfolderBase]: 3127/5549 cut-off events. [2024-11-10 10:32:34,291 INFO L125 PetriNetUnfolderBase]: For 126437/126437 co-relation queries the response was YES. [2024-11-10 10:32:34,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39378 conditions, 5549 events. 3127/5549 cut-off events. For 126437/126437 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 36138 event pairs, 229 based on Foata normal form. 40/5589 useless extension candidates. Maximal degree in co-relation 39313. Up to 1606 conditions per place. [2024-11-10 10:32:34,336 INFO L140 encePairwiseOnDemand]: 20/28 looper letters, 210 selfloop transitions, 256 changer transitions 56/525 dead transitions. [2024-11-10 10:32:34,336 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 525 transitions, 8933 flow [2024-11-10 10:32:34,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-10 10:32:34,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-11-10 10:32:34,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 185 transitions. [2024-11-10 10:32:34,338 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-11-10 10:32:34,338 INFO L175 Difference]: Start difference. First operand has 173 places, 303 transitions, 4717 flow. Second operand 15 states and 185 transitions. [2024-11-10 10:32:34,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 525 transitions, 8933 flow [2024-11-10 10:32:34,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 525 transitions, 7726 flow, removed 531 selfloop flow, removed 5 redundant places. [2024-11-10 10:32:34,843 INFO L231 Difference]: Finished difference. Result has 189 places, 386 transitions, 6151 flow [2024-11-10 10:32:34,843 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=3948, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=6151, PETRI_PLACES=189, PETRI_TRANSITIONS=386} [2024-11-10 10:32:34,844 INFO L277 CegarLoopForPetriNet]: 28 programPoint places, 161 predicate places. [2024-11-10 10:32:34,844 INFO L471 AbstractCegarLoop]: Abstraction has has 189 places, 386 transitions, 6151 flow [2024-11-10 10:32:34,845 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:32:34,845 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:32:34,845 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:32:34,858 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-10 10:32:35,045 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:32:35,046 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:32:35,046 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:32:35,046 INFO L85 PathProgramCache]: Analyzing trace with hash -1339881128, now seen corresponding path program 5 times [2024-11-10 10:32:35,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:32:35,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728295448] [2024-11-10 10:32:35,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:32:35,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:32:35,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:32:35,147 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:32:35,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:32:35,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728295448] [2024-11-10 10:32:35,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728295448] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:32:35,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96401864] [2024-11-10 10:32:35,148 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-10 10:32:35,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:32:35,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:32:35,152 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 10:32:35,156 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-10 10:32:35,202 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-10 10:32:35,203 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 10:32:35,204 INFO L255 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-10 10:32:35,205 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:32:35,281 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:32:35,285 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:32:35,337 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:32:35,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96401864] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 10:32:35,337 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 10:32:35,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2024-11-10 10:32:35,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779893713] [2024-11-10 10:32:35,338 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 10:32:35,338 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-10 10:32:35,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:32:35,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-10 10:32:35,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2024-11-10 10:32:35,343 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-11-10 10:32:35,344 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 386 transitions, 6151 flow. Second operand has 12 states, 12 states have (on average 8.083333333333334) internal successors, (97), 12 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:32:35,344 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:32:35,344 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-11-10 10:32:35,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:32:36,798 INFO L124 PetriNetUnfolderBase]: 3634/6503 cut-off events. [2024-11-10 10:32:36,799 INFO L125 PetriNetUnfolderBase]: For 166448/166448 co-relation queries the response was YES. [2024-11-10 10:32:36,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45397 conditions, 6503 events. 3634/6503 cut-off events. For 166448/166448 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 44110 event pairs, 169 based on Foata normal form. 68/6561 useless extension candidates. Maximal degree in co-relation 45329. Up to 1129 conditions per place. [2024-11-10 10:32:36,856 INFO L140 encePairwiseOnDemand]: 18/28 looper letters, 237 selfloop transitions, 370 changer transitions 9/619 dead transitions. [2024-11-10 10:32:36,856 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 619 transitions, 10645 flow [2024-11-10 10:32:36,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-10 10:32:36,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-11-10 10:32:36,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 333 transitions. [2024-11-10 10:32:36,858 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4574175824175824 [2024-11-10 10:32:36,859 INFO L175 Difference]: Start difference. First operand has 189 places, 386 transitions, 6151 flow. Second operand 26 states and 333 transitions. [2024-11-10 10:32:36,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 619 transitions, 10645 flow [2024-11-10 10:32:37,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 619 transitions, 10532 flow, removed 49 selfloop flow, removed 3 redundant places. [2024-11-10 10:32:37,431 INFO L231 Difference]: Finished difference. Result has 225 places, 472 transitions, 9250 flow [2024-11-10 10:32:37,431 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=6031, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=381, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=280, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=9250, PETRI_PLACES=225, PETRI_TRANSITIONS=472} [2024-11-10 10:32:37,431 INFO L277 CegarLoopForPetriNet]: 28 programPoint places, 197 predicate places. [2024-11-10 10:32:37,432 INFO L471 AbstractCegarLoop]: Abstraction has has 225 places, 472 transitions, 9250 flow [2024-11-10 10:32:37,432 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.083333333333334) internal successors, (97), 12 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:32:37,432 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:32:37,432 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:32:37,444 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-10 10:32:37,632 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-10 10:32:37,633 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:32:37,634 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:32:37,634 INFO L85 PathProgramCache]: Analyzing trace with hash 1591961652, now seen corresponding path program 6 times [2024-11-10 10:32:37,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:32:37,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575079176] [2024-11-10 10:32:37,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:32:37,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:32:37,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:32:37,710 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:32:37,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:32:37,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575079176] [2024-11-10 10:32:37,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575079176] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:32:37,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89040212] [2024-11-10 10:32:37,711 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-10 10:32:37,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:32:37,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:32:37,713 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 10:32:37,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-10 10:32:37,760 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-10 10:32:37,761 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 10:32:37,762 INFO L255 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-10 10:32:37,763 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:32:37,839 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:32:37,840 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:32:37,904 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:32:37,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89040212] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 10:32:37,904 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 10:32:37,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2024-11-10 10:32:37,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257743053] [2024-11-10 10:32:37,905 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 10:32:37,905 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-10 10:32:37,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:32:37,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-10 10:32:37,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2024-11-10 10:32:37,921 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-11-10 10:32:37,921 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 472 transitions, 9250 flow. Second operand has 13 states, 13 states have (on average 8.538461538461538) internal successors, (111), 13 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:32:37,921 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:32:37,921 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-11-10 10:32:37,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:32:39,807 INFO L124 PetriNetUnfolderBase]: 4433/7961 cut-off events. [2024-11-10 10:32:39,808 INFO L125 PetriNetUnfolderBase]: For 288233/288233 co-relation queries the response was YES. [2024-11-10 10:32:39,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63554 conditions, 7961 events. 4433/7961 cut-off events. For 288233/288233 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 56008 event pairs, 172 based on Foata normal form. 44/8000 useless extension candidates. Maximal degree in co-relation 63473. Up to 2090 conditions per place. [2024-11-10 10:32:39,886 INFO L140 encePairwiseOnDemand]: 19/28 looper letters, 276 selfloop transitions, 440 changer transitions 6/725 dead transitions. [2024-11-10 10:32:39,887 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 725 transitions, 15408 flow [2024-11-10 10:32:39,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-10 10:32:39,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-10 10:32:39,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 211 transitions. [2024-11-10 10:32:39,888 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4432773109243697 [2024-11-10 10:32:39,888 INFO L175 Difference]: Start difference. First operand has 225 places, 472 transitions, 9250 flow. Second operand 17 states and 211 transitions. [2024-11-10 10:32:39,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 725 transitions, 15408 flow [2024-11-10 10:32:40,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 725 transitions, 14915 flow, removed 206 selfloop flow, removed 9 redundant places. [2024-11-10 10:32:40,985 INFO L231 Difference]: Finished difference. Result has 239 places, 602 transitions, 13521 flow [2024-11-10 10:32:40,986 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=8889, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=472, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=310, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=13521, PETRI_PLACES=239, PETRI_TRANSITIONS=602} [2024-11-10 10:32:40,986 INFO L277 CegarLoopForPetriNet]: 28 programPoint places, 211 predicate places. [2024-11-10 10:32:40,986 INFO L471 AbstractCegarLoop]: Abstraction has has 239 places, 602 transitions, 13521 flow [2024-11-10 10:32:40,987 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.538461538461538) internal successors, (111), 13 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:32:40,987 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:32:40,987 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:32:40,999 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-10 10:32:41,187 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-10 10:32:41,188 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:32:41,188 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:32:41,188 INFO L85 PathProgramCache]: Analyzing trace with hash -237004480, now seen corresponding path program 7 times [2024-11-10 10:32:41,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:32:41,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238928649] [2024-11-10 10:32:41,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:32:41,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:32:41,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:32:41,313 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:32:41,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:32:41,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238928649] [2024-11-10 10:32:41,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238928649] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:32:41,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840288298] [2024-11-10 10:32:41,314 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-10 10:32:41,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:32:41,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:32:41,318 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 10:32:41,319 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-10 10:32:41,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:32:41,375 INFO L255 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-10 10:32:41,376 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:32:41,439 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:32:41,439 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:32:41,478 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:32:41,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840288298] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 10:32:41,479 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 10:32:41,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2024-11-10 10:32:41,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702775377] [2024-11-10 10:32:41,479 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 10:32:41,480 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-10 10:32:41,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:32:41,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-10 10:32:41,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2024-11-10 10:32:41,486 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-11-10 10:32:41,486 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 602 transitions, 13521 flow. Second operand has 12 states, 12 states have (on average 8.083333333333334) internal successors, (97), 12 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:32:41,486 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:32:41,486 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-11-10 10:32:41,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:32:43,445 INFO L124 PetriNetUnfolderBase]: 4386/7964 cut-off events. [2024-11-10 10:32:43,446 INFO L125 PetriNetUnfolderBase]: For 323409/323409 co-relation queries the response was YES. [2024-11-10 10:32:43,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67560 conditions, 7964 events. 4386/7964 cut-off events. For 323409/323409 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 56945 event pairs, 429 based on Foata normal form. 24/7988 useless extension candidates. Maximal degree in co-relation 67472. Up to 1622 conditions per place. [2024-11-10 10:32:43,524 INFO L140 encePairwiseOnDemand]: 18/28 looper letters, 313 selfloop transitions, 409 changer transitions 16/741 dead transitions. [2024-11-10 10:32:43,525 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 741 transitions, 17335 flow [2024-11-10 10:32:43,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-10 10:32:43,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-11-10 10:32:43,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 256 transitions. [2024-11-10 10:32:43,527 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45714285714285713 [2024-11-10 10:32:43,527 INFO L175 Difference]: Start difference. First operand has 239 places, 602 transitions, 13521 flow. Second operand 20 states and 256 transitions. [2024-11-10 10:32:43,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 741 transitions, 17335 flow [2024-11-10 10:32:44,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 741 transitions, 17199 flow, removed 35 selfloop flow, removed 4 redundant places. [2024-11-10 10:32:44,961 INFO L231 Difference]: Finished difference. Result has 258 places, 598 transitions, 14611 flow [2024-11-10 10:32:44,962 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=13124, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=580, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=388, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=14611, PETRI_PLACES=258, PETRI_TRANSITIONS=598} [2024-11-10 10:32:44,963 INFO L277 CegarLoopForPetriNet]: 28 programPoint places, 230 predicate places. [2024-11-10 10:32:44,963 INFO L471 AbstractCegarLoop]: Abstraction has has 258 places, 598 transitions, 14611 flow [2024-11-10 10:32:44,963 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.083333333333334) internal successors, (97), 12 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:32:44,963 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:32:44,963 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:32:44,976 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-10 10:32:45,164 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-10 10:32:45,164 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:32:45,164 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:32:45,165 INFO L85 PathProgramCache]: Analyzing trace with hash 801523958, now seen corresponding path program 8 times [2024-11-10 10:32:45,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:32:45,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795644856] [2024-11-10 10:32:45,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:32:45,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:32:45,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:32:45,236 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:32:45,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:32:45,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795644856] [2024-11-10 10:32:45,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795644856] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:32:45,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625977774] [2024-11-10 10:32:45,238 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-10 10:32:45,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:32:45,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:32:45,240 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 10:32:45,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-10 10:32:45,291 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-10 10:32:45,291 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 10:32:45,292 INFO L255 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-10 10:32:45,294 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:32:45,377 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:32:45,377 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:32:45,426 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:32:45,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625977774] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 10:32:45,428 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 10:32:45,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2024-11-10 10:32:45,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412629228] [2024-11-10 10:32:45,428 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 10:32:45,429 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-10 10:32:45,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:32:45,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-10 10:32:45,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2024-11-10 10:32:45,448 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-11-10 10:32:45,449 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 598 transitions, 14611 flow. Second operand has 13 states, 13 states have (on average 8.076923076923077) internal successors, (105), 13 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:32:45,449 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:32:45,449 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-11-10 10:32:45,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:32:47,906 INFO L124 PetriNetUnfolderBase]: 4776/8557 cut-off events. [2024-11-10 10:32:47,906 INFO L125 PetriNetUnfolderBase]: For 416685/416685 co-relation queries the response was YES. [2024-11-10 10:32:47,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78753 conditions, 8557 events. 4776/8557 cut-off events. For 416685/416685 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 61112 event pairs, 398 based on Foata normal form. 66/8611 useless extension candidates. Maximal degree in co-relation 78658. Up to 1703 conditions per place. [2024-11-10 10:32:47,985 INFO L140 encePairwiseOnDemand]: 18/28 looper letters, 249 selfloop transitions, 544 changer transitions 17/813 dead transitions. [2024-11-10 10:32:47,985 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 813 transitions, 20402 flow [2024-11-10 10:32:47,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-10 10:32:47,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-11-10 10:32:47,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 317 transitions. [2024-11-10 10:32:47,987 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.43543956043956045 [2024-11-10 10:32:47,987 INFO L175 Difference]: Start difference. First operand has 258 places, 598 transitions, 14611 flow. Second operand 26 states and 317 transitions. [2024-11-10 10:32:47,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 813 transitions, 20402 flow [2024-11-10 10:32:49,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 813 transitions, 19876 flow, removed 58 selfloop flow, removed 11 redundant places. [2024-11-10 10:32:49,815 INFO L231 Difference]: Finished difference. Result has 275 places, 676 transitions, 18458 flow [2024-11-10 10:32:49,816 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=14058, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=587, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=462, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=18458, PETRI_PLACES=275, PETRI_TRANSITIONS=676} [2024-11-10 10:32:49,816 INFO L277 CegarLoopForPetriNet]: 28 programPoint places, 247 predicate places. [2024-11-10 10:32:49,816 INFO L471 AbstractCegarLoop]: Abstraction has has 275 places, 676 transitions, 18458 flow [2024-11-10 10:32:49,816 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.076923076923077) internal successors, (105), 13 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:32:49,817 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:32:49,817 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:32:49,829 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-10 10:32:50,017 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-10 10:32:50,018 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:32:50,018 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:32:50,018 INFO L85 PathProgramCache]: Analyzing trace with hash -1165218914, now seen corresponding path program 9 times [2024-11-10 10:32:50,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:32:50,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198971478] [2024-11-10 10:32:50,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:32:50,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:32:50,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:32:50,104 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:32:50,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:32:50,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198971478] [2024-11-10 10:32:50,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198971478] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:32:50,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828680444] [2024-11-10 10:32:50,106 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-10 10:32:50,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:32:50,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:32:50,108 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 10:32:50,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-10 10:32:50,160 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-10 10:32:50,161 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 10:32:50,162 INFO L255 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-10 10:32:50,163 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:32:50,245 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:32:50,246 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:32:50,305 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:32:50,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828680444] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 10:32:50,306 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 10:32:50,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-11-10 10:32:50,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45244749] [2024-11-10 10:32:50,306 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 10:32:50,306 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-10 10:32:50,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:32:50,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-10 10:32:50,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2024-11-10 10:32:50,326 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-11-10 10:32:50,327 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 676 transitions, 18458 flow. Second operand has 15 states, 15 states have (on average 7.866666666666666) internal successors, (118), 15 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) [2024-11-10 10:32:50,327 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:32:50,327 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-11-10 10:32:50,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:32:53,388 INFO L124 PetriNetUnfolderBase]: 5607/10002 cut-off events. [2024-11-10 10:32:53,389 INFO L125 PetriNetUnfolderBase]: For 568338/568338 co-relation queries the response was YES. [2024-11-10 10:32:53,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98008 conditions, 10002 events. 5607/10002 cut-off events. For 568338/568338 co-relation queries the response was YES. Maximal size of possible extension queue 456. Compared 72980 event pairs, 1346 based on Foata normal form. 36/10037 useless extension candidates. Maximal degree in co-relation 97910. Up to 5195 conditions per place. [2024-11-10 10:32:53,505 INFO L140 encePairwiseOnDemand]: 18/28 looper letters, 447 selfloop transitions, 509 changer transitions 15/974 dead transitions. [2024-11-10 10:32:53,505 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 974 transitions, 26595 flow [2024-11-10 10:32:53,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-10 10:32:53,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-11-10 10:32:53,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 331 transitions. [2024-11-10 10:32:53,507 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4221938775510204 [2024-11-10 10:32:53,507 INFO L175 Difference]: Start difference. First operand has 275 places, 676 transitions, 18458 flow. Second operand 28 states and 331 transitions. [2024-11-10 10:32:53,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 974 transitions, 26595 flow [2024-11-10 10:32:56,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 974 transitions, 25844 flow, removed 171 selfloop flow, removed 14 redundant places. [2024-11-10 10:32:56,835 INFO L231 Difference]: Finished difference. Result has 299 places, 843 transitions, 24206 flow [2024-11-10 10:32:56,836 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=17812, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=676, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=364, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=24206, PETRI_PLACES=299, PETRI_TRANSITIONS=843} [2024-11-10 10:32:56,836 INFO L277 CegarLoopForPetriNet]: 28 programPoint places, 271 predicate places. [2024-11-10 10:32:56,836 INFO L471 AbstractCegarLoop]: Abstraction has has 299 places, 843 transitions, 24206 flow [2024-11-10 10:32:56,837 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 7.866666666666666) internal successors, (118), 15 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) [2024-11-10 10:32:56,837 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:32:56,837 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:32:56,849 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-10 10:32:57,037 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-10 10:32:57,038 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:32:57,038 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:32:57,038 INFO L85 PathProgramCache]: Analyzing trace with hash -391801664, now seen corresponding path program 10 times [2024-11-10 10:32:57,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:32:57,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366305324] [2024-11-10 10:32:57,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:32:57,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:32:57,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:32:57,100 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:32:57,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:32:57,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366305324] [2024-11-10 10:32:57,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366305324] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:32:57,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874359384] [2024-11-10 10:32:57,101 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-10 10:32:57,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:32:57,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:32:57,103 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 10:32:57,104 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-10 10:32:57,150 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-10 10:32:57,151 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 10:32:57,151 INFO L255 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-10 10:32:57,152 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:32:57,231 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:32:57,231 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:32:57,285 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:32:57,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [874359384] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 10:32:57,285 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 10:32:57,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-11-10 10:32:57,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058654647] [2024-11-10 10:32:57,286 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 10:32:57,286 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-10 10:32:57,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:32:57,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-10 10:32:57,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2024-11-10 10:32:57,299 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-11-10 10:32:57,299 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 843 transitions, 24206 flow. Second operand has 15 states, 15 states have (on average 8.133333333333333) internal successors, (122), 15 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:32:57,299 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:32:57,300 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-11-10 10:32:57,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:33:00,782 INFO L124 PetriNetUnfolderBase]: 6166/10903 cut-off events. [2024-11-10 10:33:00,783 INFO L125 PetriNetUnfolderBase]: For 789900/789900 co-relation queries the response was YES. [2024-11-10 10:33:00,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115428 conditions, 10903 events. 6166/10903 cut-off events. For 789900/789900 co-relation queries the response was YES. Maximal size of possible extension queue 535. Compared 79867 event pairs, 921 based on Foata normal form. 120/11022 useless extension candidates. Maximal degree in co-relation 115320. Up to 3780 conditions per place. [2024-11-10 10:33:00,903 INFO L140 encePairwiseOnDemand]: 18/28 looper letters, 468 selfloop transitions, 577 changer transitions 14/1062 dead transitions. [2024-11-10 10:33:00,904 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 1062 transitions, 31276 flow [2024-11-10 10:33:00,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-10 10:33:00,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-11-10 10:33:00,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 260 transitions. [2024-11-10 10:33:00,905 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-11-10 10:33:00,905 INFO L175 Difference]: Start difference. First operand has 299 places, 843 transitions, 24206 flow. Second operand 20 states and 260 transitions. [2024-11-10 10:33:00,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 1062 transitions, 31276 flow [2024-11-10 10:33:06,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 1062 transitions, 29578 flow, removed 609 selfloop flow, removed 7 redundant places. [2024-11-10 10:33:06,218 INFO L231 Difference]: Finished difference. Result has 323 places, 921 transitions, 27771 flow [2024-11-10 10:33:06,219 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=22718, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=834, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=496, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=27771, PETRI_PLACES=323, PETRI_TRANSITIONS=921} [2024-11-10 10:33:06,219 INFO L277 CegarLoopForPetriNet]: 28 programPoint places, 295 predicate places. [2024-11-10 10:33:06,219 INFO L471 AbstractCegarLoop]: Abstraction has has 323 places, 921 transitions, 27771 flow [2024-11-10 10:33:06,219 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 8.133333333333333) internal successors, (122), 15 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:33:06,219 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:33:06,219 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:33:06,232 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-10 10:33:06,420 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-10 10:33:06,420 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:33:06,420 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:33:06,421 INFO L85 PathProgramCache]: Analyzing trace with hash 325113732, now seen corresponding path program 11 times [2024-11-10 10:33:06,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:33:06,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099173833] [2024-11-10 10:33:06,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:33:06,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:33:06,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:33:06,494 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:33:06,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:33:06,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099173833] [2024-11-10 10:33:06,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099173833] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:33:06,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300075554] [2024-11-10 10:33:06,494 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-10 10:33:06,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:33:06,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:33:06,497 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 10:33:06,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-10 10:33:06,546 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-10 10:33:06,547 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 10:33:06,548 INFO L255 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-10 10:33:06,549 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:33:06,624 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:33:06,625 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:33:06,672 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 10:33:06,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300075554] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 10:33:06,673 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 10:33:06,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2024-11-10 10:33:06,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965043851] [2024-11-10 10:33:06,674 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 10:33:06,675 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-10 10:33:06,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:33:06,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-10 10:33:06,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2024-11-10 10:33:06,704 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-11-10 10:33:06,704 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 921 transitions, 27771 flow. Second operand has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:33:06,704 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:33:06,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-11-10 10:33:06,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:33:10,701 INFO L124 PetriNetUnfolderBase]: 6508/11499 cut-off events. [2024-11-10 10:33:10,701 INFO L125 PetriNetUnfolderBase]: For 827673/827673 co-relation queries the response was YES. [2024-11-10 10:33:10,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123731 conditions, 11499 events. 6508/11499 cut-off events. For 827673/827673 co-relation queries the response was YES. Maximal size of possible extension queue 570. Compared 84756 event pairs, 895 based on Foata normal form. 66/11564 useless extension candidates. Maximal degree in co-relation 123616. Up to 3535 conditions per place. [2024-11-10 10:33:10,844 INFO L140 encePairwiseOnDemand]: 18/28 looper letters, 433 selfloop transitions, 626 changer transitions 11/1073 dead transitions. [2024-11-10 10:33:10,844 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 1073 transitions, 33135 flow [2024-11-10 10:33:10,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-10 10:33:10,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-11-10 10:33:10,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 238 transitions. [2024-11-10 10:33:10,845 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4473684210526316 [2024-11-10 10:33:10,845 INFO L175 Difference]: Start difference. First operand has 323 places, 921 transitions, 27771 flow. Second operand 19 states and 238 transitions. [2024-11-10 10:33:10,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 1073 transitions, 33135 flow [2024-11-10 10:33:15,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 1073 transitions, 32716 flow, removed 156 selfloop flow, removed 4 redundant places. [2024-11-10 10:33:15,763 INFO L231 Difference]: Finished difference. Result has 344 places, 963 transitions, 31396 flow [2024-11-10 10:33:15,764 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=27304, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=912, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=577, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=316, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=31396, PETRI_PLACES=344, PETRI_TRANSITIONS=963} [2024-11-10 10:33:15,764 INFO L277 CegarLoopForPetriNet]: 28 programPoint places, 316 predicate places. [2024-11-10 10:33:15,764 INFO L471 AbstractCegarLoop]: Abstraction has has 344 places, 963 transitions, 31396 flow [2024-11-10 10:33:15,765 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:33:15,765 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:33:15,765 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:33:15,777 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-10 10:33:15,965 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:33:15,966 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:33:15,966 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:33:15,966 INFO L85 PathProgramCache]: Analyzing trace with hash 26406450, now seen corresponding path program 12 times [2024-11-10 10:33:15,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:33:15,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693511815] [2024-11-10 10:33:15,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:33:15,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:33:15,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:33:16,071 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:33:16,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:33:16,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693511815] [2024-11-10 10:33:16,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693511815] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:33:16,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007858982] [2024-11-10 10:33:16,072 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-10 10:33:16,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:33:16,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:33:16,074 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 10:33:16,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-10 10:33:16,124 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-11-10 10:33:16,124 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 10:33:16,125 INFO L255 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-10 10:33:16,127 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:33:16,189 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:33:16,190 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:33:16,222 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 10:33:16,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007858982] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 10:33:16,222 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 10:33:16,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2024-11-10 10:33:16,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841201150] [2024-11-10 10:33:16,223 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 10:33:16,223 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-10 10:33:16,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:33:16,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-10 10:33:16,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2024-11-10 10:33:16,227 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-11-10 10:33:16,227 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 963 transitions, 31396 flow. Second operand has 13 states, 13 states have (on average 8.076923076923077) internal successors, (105), 13 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:33:16,228 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:33:16,228 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-11-10 10:33:16,228 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:33:20,270 INFO L124 PetriNetUnfolderBase]: 6499/11558 cut-off events. [2024-11-10 10:33:20,270 INFO L125 PetriNetUnfolderBase]: For 893617/893617 co-relation queries the response was YES. [2024-11-10 10:33:20,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129819 conditions, 11558 events. 6499/11558 cut-off events. For 893617/893617 co-relation queries the response was YES. Maximal size of possible extension queue 564. Compared 86161 event pairs, 1645 based on Foata normal form. 16/11573 useless extension candidates. Maximal degree in co-relation 129696. Up to 6394 conditions per place. [2024-11-10 10:33:20,403 INFO L140 encePairwiseOnDemand]: 18/28 looper letters, 451 selfloop transitions, 574 changer transitions 13/1041 dead transitions. [2024-11-10 10:33:20,403 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 1041 transitions, 34541 flow [2024-11-10 10:33:20,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-10 10:33:20,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-11-10 10:33:20,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 219 transitions. [2024-11-10 10:33:20,404 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-11-10 10:33:20,404 INFO L175 Difference]: Start difference. First operand has 344 places, 963 transitions, 31396 flow. Second operand 18 states and 219 transitions. [2024-11-10 10:33:20,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 1041 transitions, 34541 flow [2024-11-10 10:33:26,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 1041 transitions, 34228 flow, removed 74 selfloop flow, removed 15 redundant places. [2024-11-10 10:33:26,092 INFO L231 Difference]: Finished difference. Result has 346 places, 957 transitions, 33287 flow [2024-11-10 10:33:26,093 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=30835, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=946, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=561, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=379, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=33287, PETRI_PLACES=346, PETRI_TRANSITIONS=957} [2024-11-10 10:33:26,094 INFO L277 CegarLoopForPetriNet]: 28 programPoint places, 318 predicate places. [2024-11-10 10:33:26,094 INFO L471 AbstractCegarLoop]: Abstraction has has 346 places, 957 transitions, 33287 flow [2024-11-10 10:33:26,094 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.076923076923077) internal successors, (105), 13 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:33:26,094 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:33:26,094 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:33:26,106 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-10 10:33:26,294 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:33:26,295 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:33:26,295 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:33:26,296 INFO L85 PathProgramCache]: Analyzing trace with hash 565595982, now seen corresponding path program 13 times [2024-11-10 10:33:26,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:33:26,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549448888] [2024-11-10 10:33:26,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:33:26,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:33:26,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:33:26,423 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 10:33:26,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:33:26,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549448888] [2024-11-10 10:33:26,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549448888] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:33:26,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113858512] [2024-11-10 10:33:26,424 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-10 10:33:26,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:33:26,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:33:26,426 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 10:33:26,427 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-10 10:33:26,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:33:26,477 INFO L255 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-10 10:33:26,477 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:33:26,518 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:33:26,519 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:33:26,574 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:33:26,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113858512] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 10:33:26,575 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 10:33:26,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 7 [2024-11-10 10:33:26,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807819263] [2024-11-10 10:33:26,575 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 10:33:26,575 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-10 10:33:26,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:33:26,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-10 10:33:26,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-11-10 10:33:26,576 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 28 [2024-11-10 10:33:26,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 957 transitions, 33287 flow. Second operand has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:33:26,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:33:26,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 28 [2024-11-10 10:33:26,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:33:32,671 INFO L124 PetriNetUnfolderBase]: 9610/18279 cut-off events. [2024-11-10 10:33:32,671 INFO L125 PetriNetUnfolderBase]: For 1550461/1551117 co-relation queries the response was YES. [2024-11-10 10:33:32,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 221991 conditions, 18279 events. 9610/18279 cut-off events. For 1550461/1551117 co-relation queries the response was YES. Maximal size of possible extension queue 870. Compared 159573 event pairs, 806 based on Foata normal form. 366/18443 useless extension candidates. Maximal degree in co-relation 221869. Up to 4519 conditions per place. [2024-11-10 10:33:33,326 INFO L140 encePairwiseOnDemand]: 23/28 looper letters, 1927 selfloop transitions, 10 changer transitions 237/2309 dead transitions. [2024-11-10 10:33:33,326 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 2309 transitions, 86690 flow [2024-11-10 10:33:33,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-10 10:33:33,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-10 10:33:33,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 98 transitions. [2024-11-10 10:33:33,328 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7 [2024-11-10 10:33:33,328 INFO L175 Difference]: Start difference. First operand has 346 places, 957 transitions, 33287 flow. Second operand 5 states and 98 transitions. [2024-11-10 10:33:33,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 2309 transitions, 86690 flow [2024-11-10 10:33:45,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 2309 transitions, 86344 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-11-10 10:33:45,724 INFO L231 Difference]: Finished difference. Result has 339 places, 946 transitions, 32671 flow [2024-11-10 10:33:45,725 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=33104, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=957, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=950, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=32671, PETRI_PLACES=339, PETRI_TRANSITIONS=946} [2024-11-10 10:33:45,726 INFO L277 CegarLoopForPetriNet]: 28 programPoint places, 311 predicate places. [2024-11-10 10:33:45,726 INFO L471 AbstractCegarLoop]: Abstraction has has 339 places, 946 transitions, 32671 flow [2024-11-10 10:33:45,726 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:33:45,726 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:33:45,726 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:33:45,744 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-10 10:33:45,926 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:33:45,927 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:33:45,927 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:33:45,927 INFO L85 PathProgramCache]: Analyzing trace with hash -318644380, now seen corresponding path program 14 times [2024-11-10 10:33:45,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:33:45,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099474877] [2024-11-10 10:33:45,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:33:45,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:33:45,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:33:46,033 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:33:46,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:33:46,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099474877] [2024-11-10 10:33:46,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099474877] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:33:46,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075052825] [2024-11-10 10:33:46,034 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-10 10:33:46,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:33:46,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:33:46,036 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 10:33:46,038 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-10 10:33:46,089 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-10 10:33:46,089 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 10:33:46,090 INFO L255 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-10 10:33:46,091 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:33:46,208 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 14 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:33:46,208 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:33:46,293 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:33:46,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075052825] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 10:33:46,294 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 10:33:46,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2024-11-10 10:33:46,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324915404] [2024-11-10 10:33:46,294 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 10:33:46,295 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-10 10:33:46,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:33:46,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-10 10:33:46,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2024-11-10 10:33:46,311 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-11-10 10:33:46,312 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 946 transitions, 32671 flow. Second operand has 20 states, 20 states have (on average 8.1) internal successors, (162), 20 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) [2024-11-10 10:33:46,312 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:33:46,312 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-11-10 10:33:46,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand