./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/unroll-cond-3.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3289d67d 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/unroll-cond-3.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 9fb4c28a8a216c266c6ae14d377c8e26c68bb16bf7c2fe2809f039d12d6c4b55 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-3289d67-m [2024-11-16 19:34:54,196 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-16 19:34:54,259 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-16 19:34:54,268 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-16 19:34:54,269 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-16 19:34:54,284 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-16 19:34:54,285 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-16 19:34:54,285 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-16 19:34:54,286 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-16 19:34:54,286 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-16 19:34:54,286 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-16 19:34:54,286 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-16 19:34:54,287 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-16 19:34:54,287 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-16 19:34:54,287 INFO L153 SettingsManager]: * Use SBE=true [2024-11-16 19:34:54,288 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-16 19:34:54,288 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-16 19:34:54,288 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-16 19:34:54,288 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-16 19:34:54,289 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-16 19:34:54,289 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-16 19:34:54,291 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-16 19:34:54,291 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-16 19:34:54,292 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-16 19:34:54,292 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-16 19:34:54,292 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-16 19:34:54,292 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-16 19:34:54,293 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-16 19:34:54,293 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-16 19:34:54,293 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-16 19:34:54,293 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-16 19:34:54,294 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-16 19:34:54,294 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-16 19:34:54,294 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-16 19:34:54,294 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-16 19:34:54,295 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-16 19:34:54,295 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-16 19:34:54,295 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-16 19:34:54,295 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-16 19:34:54,295 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-16 19:34:54,296 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-16 19:34:54,296 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-16 19:34:54,296 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9fb4c28a8a216c266c6ae14d377c8e26c68bb16bf7c2fe2809f039d12d6c4b55 [2024-11-16 19:34:54,506 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-16 19:34:54,527 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-16 19:34:54,529 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-16 19:34:54,530 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-16 19:34:54,531 INFO L274 PluginConnector]: CDTParser initialized [2024-11-16 19:34:54,532 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/unroll-cond-3.wvr.c [2024-11-16 19:34:55,841 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-16 19:34:56,017 INFO L384 CDTParser]: Found 1 translation units. [2024-11-16 19:34:56,018 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/unroll-cond-3.wvr.c [2024-11-16 19:34:56,028 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4c9d86e6c/693168b9a6b246a5bab0e116b4429214/FLAG0dbb8033e [2024-11-16 19:34:56,406 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4c9d86e6c/693168b9a6b246a5bab0e116b4429214 [2024-11-16 19:34:56,409 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-16 19:34:56,410 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-16 19:34:56,411 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-16 19:34:56,411 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-16 19:34:56,415 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-16 19:34:56,416 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 07:34:56" (1/1) ... [2024-11-16 19:34:56,416 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42124114 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:34:56, skipping insertion in model container [2024-11-16 19:34:56,417 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 07:34:56" (1/1) ... [2024-11-16 19:34:56,433 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-16 19:34:56,609 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/unroll-cond-3.wvr.c[2667,2680] [2024-11-16 19:34:56,617 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-16 19:34:56,624 INFO L200 MainTranslator]: Completed pre-run [2024-11-16 19:34:56,641 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/unroll-cond-3.wvr.c[2667,2680] [2024-11-16 19:34:56,644 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-16 19:34:56,657 INFO L204 MainTranslator]: Completed translation [2024-11-16 19:34:56,658 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:34:56 WrapperNode [2024-11-16 19:34:56,658 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-16 19:34:56,659 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-16 19:34:56,659 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-16 19:34:56,659 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-16 19:34:56,665 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:34:56" (1/1) ... [2024-11-16 19:34:56,672 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:34:56" (1/1) ... [2024-11-16 19:34:56,692 INFO L138 Inliner]: procedures = 23, calls = 27, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 152 [2024-11-16 19:34:56,692 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-16 19:34:56,693 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-16 19:34:56,693 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-16 19:34:56,693 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-16 19:34:56,713 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:34:56" (1/1) ... [2024-11-16 19:34:56,717 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:34:56" (1/1) ... [2024-11-16 19:34:56,721 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:34:56" (1/1) ... [2024-11-16 19:34:56,733 INFO L175 MemorySlicer]: Split 9 memory accesses to 2 slices as follows [2, 7]. 78 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-11-16 19:34:56,734 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:34:56" (1/1) ... [2024-11-16 19:34:56,734 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:34:56" (1/1) ... [2024-11-16 19:34:56,742 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:34:56" (1/1) ... [2024-11-16 19:34:56,743 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:34:56" (1/1) ... [2024-11-16 19:34:56,744 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:34:56" (1/1) ... [2024-11-16 19:34:56,745 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:34:56" (1/1) ... [2024-11-16 19:34:56,747 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-16 19:34:56,748 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-16 19:34:56,748 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-16 19:34:56,748 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-16 19:34:56,749 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:34:56" (1/1) ... [2024-11-16 19:34:56,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-16 19:34:56,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:34:56,783 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) [2024-11-16 19:34:56,786 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 [2024-11-16 19:34:56,829 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-16 19:34:56,829 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-16 19:34:56,830 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-16 19:34:56,830 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-16 19:34:56,830 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-16 19:34:56,830 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-16 19:34:56,830 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-16 19:34:56,830 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-16 19:34:56,831 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-16 19:34:56,832 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-16 19:34:56,832 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-16 19:34:56,832 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-16 19:34:56,832 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-16 19:34:56,832 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-16 19:34:56,833 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-16 19:34:56,922 INFO L256 CfgBuilder]: Building ICFG [2024-11-16 19:34:56,924 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-16 19:34:57,144 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-16 19:34:57,144 INFO L307 CfgBuilder]: Performing block encoding [2024-11-16 19:34:57,408 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-16 19:34:57,408 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-16 19:34:57,409 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.11 07:34:57 BoogieIcfgContainer [2024-11-16 19:34:57,409 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-16 19:34:57,411 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-16 19:34:57,412 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-16 19:34:57,415 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-16 19:34:57,415 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 07:34:56" (1/3) ... [2024-11-16 19:34:57,416 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f4f3e2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 07:34:57, skipping insertion in model container [2024-11-16 19:34:57,416 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:34:56" (2/3) ... [2024-11-16 19:34:57,416 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f4f3e2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 07:34:57, skipping insertion in model container [2024-11-16 19:34:57,417 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.11 07:34:57" (3/3) ... [2024-11-16 19:34:57,418 INFO L112 eAbstractionObserver]: Analyzing ICFG unroll-cond-3.wvr.c [2024-11-16 19:34:57,433 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-16 19:34:57,433 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-16 19:34:57,433 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-16 19:34:57,476 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-16 19:34:57,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 30 places, 29 transitions, 72 flow [2024-11-16 19:34:57,539 INFO L124 PetriNetUnfolderBase]: 6/27 cut-off events. [2024-11-16 19:34:57,540 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-16 19:34:57,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36 conditions, 27 events. 6/27 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 26 event pairs, 0 based on Foata normal form. 0/20 useless extension candidates. Maximal degree in co-relation 17. Up to 2 conditions per place. [2024-11-16 19:34:57,544 INFO L82 GeneralOperation]: Start removeDead. Operand has 30 places, 29 transitions, 72 flow [2024-11-16 19:34:57,546 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 27 places, 26 transitions, 64 flow [2024-11-16 19:34:57,552 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-16 19:34:57,557 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;@272b7471, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-16 19:34:57,558 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-11-16 19:34:57,565 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-16 19:34:57,565 INFO L124 PetriNetUnfolderBase]: 6/25 cut-off events. [2024-11-16 19:34:57,565 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-16 19:34:57,565 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:34:57,566 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:34:57,566 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:34:57,570 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:34:57,570 INFO L85 PathProgramCache]: Analyzing trace with hash 112835620, now seen corresponding path program 1 times [2024-11-16 19:34:57,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:34:57,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326604729] [2024-11-16 19:34:57,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:34:57,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:34:57,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:34:57,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:34:57,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:34:57,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326604729] [2024-11-16 19:34:57,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326604729] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:34:57,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:34:57,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-16 19:34:57,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874782302] [2024-11-16 19:34:57,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:34:57,734 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-16 19:34:57,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:34:57,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-16 19:34:57,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-16 19:34:57,818 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 29 [2024-11-16 19:34:57,819 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 26 transitions, 64 flow. Second operand has 2 states, 2 states have (on average 17.0) internal successors, (34), 2 states have internal predecessors, (34), 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) [2024-11-16 19:34:57,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:34:57,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 29 [2024-11-16 19:34:57,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:34:57,897 INFO L124 PetriNetUnfolderBase]: 38/86 cut-off events. [2024-11-16 19:34:57,897 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-11-16 19:34:57,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 171 conditions, 86 events. 38/86 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 206 event pairs, 22 based on Foata normal form. 16/98 useless extension candidates. Maximal degree in co-relation 134. Up to 70 conditions per place. [2024-11-16 19:34:57,900 INFO L140 encePairwiseOnDemand]: 26/29 looper letters, 16 selfloop transitions, 0 changer transitions 0/23 dead transitions. [2024-11-16 19:34:57,900 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 23 transitions, 90 flow [2024-11-16 19:34:57,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-16 19:34:57,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-11-16 19:34:57,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 37 transitions. [2024-11-16 19:34:57,909 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6379310344827587 [2024-11-16 19:34:57,910 INFO L175 Difference]: Start difference. First operand has 27 places, 26 transitions, 64 flow. Second operand 2 states and 37 transitions. [2024-11-16 19:34:57,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 23 transitions, 90 flow [2024-11-16 19:34:57,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 23 transitions, 82 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-16 19:34:57,914 INFO L231 Difference]: Finished difference. Result has 24 places, 23 transitions, 50 flow [2024-11-16 19:34:57,916 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=23, 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=24, PETRI_TRANSITIONS=23} [2024-11-16 19:34:57,919 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, -3 predicate places. [2024-11-16 19:34:57,919 INFO L471 AbstractCegarLoop]: Abstraction has has 24 places, 23 transitions, 50 flow [2024-11-16 19:34:57,919 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 17.0) internal successors, (34), 2 states have internal predecessors, (34), 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) [2024-11-16 19:34:57,919 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:34:57,919 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:34:57,920 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-16 19:34:57,920 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:34:57,920 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:34:57,920 INFO L85 PathProgramCache]: Analyzing trace with hash 732518441, now seen corresponding path program 1 times [2024-11-16 19:34:57,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:34:57,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988242754] [2024-11-16 19:34:57,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:34:57,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:34:57,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:34:58,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:34:58,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:34:58,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988242754] [2024-11-16 19:34:58,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988242754] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:34:58,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:34:58,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-16 19:34:58,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190342303] [2024-11-16 19:34:58,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:34:58,102 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-16 19:34:58,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:34:58,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-16 19:34:58,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-16 19:34:58,103 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 29 [2024-11-16 19:34:58,103 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 23 transitions, 50 flow. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:34:58,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:34:58,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 29 [2024-11-16 19:34:58,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:34:58,145 INFO L124 PetriNetUnfolderBase]: 38/88 cut-off events. [2024-11-16 19:34:58,145 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-16 19:34:58,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 166 conditions, 88 events. 38/88 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 206 event pairs, 22 based on Foata normal form. 0/83 useless extension candidates. Maximal degree in co-relation 163. Up to 71 conditions per place. [2024-11-16 19:34:58,146 INFO L140 encePairwiseOnDemand]: 26/29 looper letters, 16 selfloop transitions, 2 changer transitions 0/24 dead transitions. [2024-11-16 19:34:58,146 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 24 transitions, 88 flow [2024-11-16 19:34:58,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-16 19:34:58,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-16 19:34:58,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 43 transitions. [2024-11-16 19:34:58,147 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4942528735632184 [2024-11-16 19:34:58,148 INFO L175 Difference]: Start difference. First operand has 24 places, 23 transitions, 50 flow. Second operand 3 states and 43 transitions. [2024-11-16 19:34:58,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 24 transitions, 88 flow [2024-11-16 19:34:58,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 24 transitions, 88 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-16 19:34:58,149 INFO L231 Difference]: Finished difference. Result has 27 places, 24 transitions, 62 flow [2024-11-16 19:34:58,150 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=24, 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=62, PETRI_PLACES=27, PETRI_TRANSITIONS=24} [2024-11-16 19:34:58,150 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 0 predicate places. [2024-11-16 19:34:58,150 INFO L471 AbstractCegarLoop]: Abstraction has has 27 places, 24 transitions, 62 flow [2024-11-16 19:34:58,151 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:34:58,151 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:34:58,151 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, 1] [2024-11-16 19:34:58,151 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-16 19:34:58,151 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:34:58,151 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:34:58,151 INFO L85 PathProgramCache]: Analyzing trace with hash 1817869758, now seen corresponding path program 1 times [2024-11-16 19:34:58,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:34:58,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835747647] [2024-11-16 19:34:58,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:34:58,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:34:58,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:34:58,450 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 19:34:58,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:34:58,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835747647] [2024-11-16 19:34:58,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835747647] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:34:58,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:34:58,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-16 19:34:58,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836008040] [2024-11-16 19:34:58,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:34:58,451 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-16 19:34:58,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:34:58,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-16 19:34:58,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-16 19:34:58,467 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-11-16 19:34:58,468 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 24 transitions, 62 flow. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 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) [2024-11-16 19:34:58,468 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:34:58,468 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-11-16 19:34:58,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:34:58,734 INFO L124 PetriNetUnfolderBase]: 113/230 cut-off events. [2024-11-16 19:34:58,734 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-16 19:34:58,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 451 conditions, 230 events. 113/230 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 832 event pairs, 42 based on Foata normal form. 0/193 useless extension candidates. Maximal degree in co-relation 446. Up to 112 conditions per place. [2024-11-16 19:34:58,736 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 38 selfloop transitions, 5 changer transitions 0/48 dead transitions. [2024-11-16 19:34:58,736 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 48 transitions, 201 flow [2024-11-16 19:34:58,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-16 19:34:58,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-16 19:34:58,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 78 transitions. [2024-11-16 19:34:58,739 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5379310344827586 [2024-11-16 19:34:58,739 INFO L175 Difference]: Start difference. First operand has 27 places, 24 transitions, 62 flow. Second operand 5 states and 78 transitions. [2024-11-16 19:34:58,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 48 transitions, 201 flow [2024-11-16 19:34:58,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 48 transitions, 199 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-16 19:34:58,741 INFO L231 Difference]: Finished difference. Result has 33 places, 28 transitions, 96 flow [2024-11-16 19:34:58,741 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=96, PETRI_PLACES=33, PETRI_TRANSITIONS=28} [2024-11-16 19:34:58,742 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 6 predicate places. [2024-11-16 19:34:58,742 INFO L471 AbstractCegarLoop]: Abstraction has has 33 places, 28 transitions, 96 flow [2024-11-16 19:34:58,742 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 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) [2024-11-16 19:34:58,742 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:34:58,742 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, 1] [2024-11-16 19:34:58,743 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-16 19:34:58,743 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:34:58,743 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:34:58,744 INFO L85 PathProgramCache]: Analyzing trace with hash 1697703908, now seen corresponding path program 2 times [2024-11-16 19:34:58,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:34:58,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144698286] [2024-11-16 19:34:58,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:34:58,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:34:58,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:34:59,066 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 19:34:59,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:34:59,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144698286] [2024-11-16 19:34:59,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144698286] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:34:59,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:34:59,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-16 19:34:59,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069354296] [2024-11-16 19:34:59,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:34:59,069 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-16 19:34:59,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:34:59,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-16 19:34:59,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-11-16 19:34:59,077 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-11-16 19:34:59,077 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 28 transitions, 96 flow. Second operand has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 7 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) [2024-11-16 19:34:59,078 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:34:59,078 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-11-16 19:34:59,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:34:59,266 INFO L124 PetriNetUnfolderBase]: 180/374 cut-off events. [2024-11-16 19:34:59,266 INFO L125 PetriNetUnfolderBase]: For 201/201 co-relation queries the response was YES. [2024-11-16 19:34:59,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 925 conditions, 374 events. 180/374 cut-off events. For 201/201 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1588 event pairs, 10 based on Foata normal form. 3/329 useless extension candidates. Maximal degree in co-relation 917. Up to 138 conditions per place. [2024-11-16 19:34:59,272 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 49 selfloop transitions, 23 changer transitions 2/79 dead transitions. [2024-11-16 19:34:59,272 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 79 transitions, 412 flow [2024-11-16 19:34:59,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-16 19:34:59,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-16 19:34:59,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 141 transitions. [2024-11-16 19:34:59,275 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4862068965517241 [2024-11-16 19:34:59,275 INFO L175 Difference]: Start difference. First operand has 33 places, 28 transitions, 96 flow. Second operand 10 states and 141 transitions. [2024-11-16 19:34:59,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 79 transitions, 412 flow [2024-11-16 19:34:59,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 79 transitions, 402 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-16 19:34:59,280 INFO L231 Difference]: Finished difference. Result has 47 places, 47 transitions, 260 flow [2024-11-16 19:34:59,280 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=260, PETRI_PLACES=47, PETRI_TRANSITIONS=47} [2024-11-16 19:34:59,281 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 20 predicate places. [2024-11-16 19:34:59,282 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 47 transitions, 260 flow [2024-11-16 19:34:59,282 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 7 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) [2024-11-16 19:34:59,282 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:34:59,282 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, 1] [2024-11-16 19:34:59,283 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-16 19:34:59,283 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:34:59,283 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:34:59,285 INFO L85 PathProgramCache]: Analyzing trace with hash -1165627750, now seen corresponding path program 3 times [2024-11-16 19:34:59,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:34:59,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429317142] [2024-11-16 19:34:59,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:34:59,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:34:59,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:34:59,490 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 19:34:59,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:34:59,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429317142] [2024-11-16 19:34:59,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429317142] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:34:59,490 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:34:59,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-16 19:34:59,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385045782] [2024-11-16 19:34:59,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:34:59,491 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-16 19:34:59,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:34:59,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-16 19:34:59,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-11-16 19:34:59,497 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-11-16 19:34:59,497 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 47 transitions, 260 flow. Second operand has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 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) [2024-11-16 19:34:59,497 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:34:59,497 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-11-16 19:34:59,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:34:59,666 INFO L124 PetriNetUnfolderBase]: 193/389 cut-off events. [2024-11-16 19:34:59,666 INFO L125 PetriNetUnfolderBase]: For 815/815 co-relation queries the response was YES. [2024-11-16 19:34:59,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1271 conditions, 389 events. 193/389 cut-off events. For 815/815 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1665 event pairs, 30 based on Foata normal form. 5/394 useless extension candidates. Maximal degree in co-relation 1258. Up to 261 conditions per place. [2024-11-16 19:34:59,672 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 44 selfloop transitions, 20 changer transitions 0/69 dead transitions. [2024-11-16 19:34:59,672 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 69 transitions, 485 flow [2024-11-16 19:34:59,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-16 19:34:59,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-16 19:34:59,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 92 transitions. [2024-11-16 19:34:59,675 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5287356321839081 [2024-11-16 19:34:59,675 INFO L175 Difference]: Start difference. First operand has 47 places, 47 transitions, 260 flow. Second operand 6 states and 92 transitions. [2024-11-16 19:34:59,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 69 transitions, 485 flow [2024-11-16 19:34:59,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 69 transitions, 471 flow, removed 5 selfloop flow, removed 1 redundant places. [2024-11-16 19:34:59,684 INFO L231 Difference]: Finished difference. Result has 53 places, 53 transitions, 346 flow [2024-11-16 19:34:59,686 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=346, PETRI_PLACES=53, PETRI_TRANSITIONS=53} [2024-11-16 19:34:59,688 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 26 predicate places. [2024-11-16 19:34:59,688 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 53 transitions, 346 flow [2024-11-16 19:34:59,688 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 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) [2024-11-16 19:34:59,689 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:34:59,689 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, 1] [2024-11-16 19:34:59,689 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-16 19:34:59,689 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:34:59,689 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:34:59,689 INFO L85 PathProgramCache]: Analyzing trace with hash -1004167610, now seen corresponding path program 4 times [2024-11-16 19:34:59,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:34:59,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546178017] [2024-11-16 19:34:59,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:34:59,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:34:59,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:34:59,905 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 19:34:59,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:34:59,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546178017] [2024-11-16 19:34:59,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546178017] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:34:59,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:34:59,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-16 19:34:59,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279408581] [2024-11-16 19:34:59,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:34:59,907 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-16 19:34:59,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:34:59,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-16 19:34:59,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-11-16 19:34:59,919 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-11-16 19:34:59,920 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 53 transitions, 346 flow. Second operand has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 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) [2024-11-16 19:34:59,920 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:34:59,920 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-11-16 19:34:59,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:35:00,058 INFO L124 PetriNetUnfolderBase]: 183/363 cut-off events. [2024-11-16 19:35:00,058 INFO L125 PetriNetUnfolderBase]: For 1038/1038 co-relation queries the response was YES. [2024-11-16 19:35:00,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1265 conditions, 363 events. 183/363 cut-off events. For 1038/1038 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1485 event pairs, 34 based on Foata normal form. 5/366 useless extension candidates. Maximal degree in co-relation 1250. Up to 249 conditions per place. [2024-11-16 19:35:00,061 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 43 selfloop transitions, 21 changer transitions 0/69 dead transitions. [2024-11-16 19:35:00,061 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 69 transitions, 546 flow [2024-11-16 19:35:00,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-16 19:35:00,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-16 19:35:00,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 89 transitions. [2024-11-16 19:35:00,062 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5114942528735632 [2024-11-16 19:35:00,062 INFO L175 Difference]: Start difference. First operand has 53 places, 53 transitions, 346 flow. Second operand 6 states and 89 transitions. [2024-11-16 19:35:00,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 69 transitions, 546 flow [2024-11-16 19:35:00,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 69 transitions, 521 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-11-16 19:35:00,069 INFO L231 Difference]: Finished difference. Result has 58 places, 55 transitions, 398 flow [2024-11-16 19:35:00,069 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=322, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=398, PETRI_PLACES=58, PETRI_TRANSITIONS=55} [2024-11-16 19:35:00,071 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 31 predicate places. [2024-11-16 19:35:00,071 INFO L471 AbstractCegarLoop]: Abstraction has has 58 places, 55 transitions, 398 flow [2024-11-16 19:35:00,071 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 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) [2024-11-16 19:35:00,071 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:35:00,071 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] [2024-11-16 19:35:00,071 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-16 19:35:00,071 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:35:00,072 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:35:00,072 INFO L85 PathProgramCache]: Analyzing trace with hash 888853137, now seen corresponding path program 1 times [2024-11-16 19:35:00,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:35:00,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203371715] [2024-11-16 19:35:00,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:35:00,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:35:00,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:35:00,240 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 19:35:00,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:35:00,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203371715] [2024-11-16 19:35:00,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203371715] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:35:00,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320110500] [2024-11-16 19:35:00,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:35:00,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:35:00,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:35:00,245 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) [2024-11-16 19:35:00,246 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-16 19:35:00,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:35:00,321 INFO L255 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-16 19:35:00,329 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:35:00,398 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-16 19:35:00,776 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-16 19:35:00,790 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:35:00,790 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:35:01,673 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2024-11-16 19:35:01,690 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-16 19:35:01,690 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 41 [2024-11-16 19:35:01,721 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:35:01,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320110500] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 19:35:01,721 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 19:35:01,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 21 [2024-11-16 19:35:01,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270669356] [2024-11-16 19:35:01,722 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 19:35:01,722 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-16 19:35:01,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:35:01,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-16 19:35:01,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2024-11-16 19:35:01,756 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-11-16 19:35:01,757 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 55 transitions, 398 flow. Second operand has 21 states, 21 states have (on average 9.285714285714286) internal successors, (195), 21 states have internal predecessors, (195), 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) [2024-11-16 19:35:01,757 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:35:01,757 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-11-16 19:35:01,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:35:02,704 INFO L124 PetriNetUnfolderBase]: 370/745 cut-off events. [2024-11-16 19:35:02,705 INFO L125 PetriNetUnfolderBase]: For 1854/1854 co-relation queries the response was YES. [2024-11-16 19:35:02,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2380 conditions, 745 events. 370/745 cut-off events. For 1854/1854 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 3768 event pairs, 10 based on Foata normal form. 6/751 useless extension candidates. Maximal degree in co-relation 2363. Up to 197 conditions per place. [2024-11-16 19:35:02,710 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 95 selfloop transitions, 46 changer transitions 4/150 dead transitions. [2024-11-16 19:35:02,710 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 150 transitions, 1076 flow [2024-11-16 19:35:02,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-16 19:35:02,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-16 19:35:02,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 242 transitions. [2024-11-16 19:35:02,712 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4908722109533469 [2024-11-16 19:35:02,712 INFO L175 Difference]: Start difference. First operand has 58 places, 55 transitions, 398 flow. Second operand 17 states and 242 transitions. [2024-11-16 19:35:02,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 150 transitions, 1076 flow [2024-11-16 19:35:02,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 150 transitions, 1026 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-11-16 19:35:02,722 INFO L231 Difference]: Finished difference. Result has 77 places, 81 transitions, 652 flow [2024-11-16 19:35:02,722 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=348, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=652, PETRI_PLACES=77, PETRI_TRANSITIONS=81} [2024-11-16 19:35:02,723 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 50 predicate places. [2024-11-16 19:35:02,723 INFO L471 AbstractCegarLoop]: Abstraction has has 77 places, 81 transitions, 652 flow [2024-11-16 19:35:02,724 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 9.285714285714286) internal successors, (195), 21 states have internal predecessors, (195), 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) [2024-11-16 19:35:02,724 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:35:02,724 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] [2024-11-16 19:35:02,737 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-16 19:35:02,928 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:35:02,929 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:35:02,929 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:35:02,929 INFO L85 PathProgramCache]: Analyzing trace with hash -309061353, now seen corresponding path program 2 times [2024-11-16 19:35:02,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:35:02,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843069119] [2024-11-16 19:35:02,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:35:02,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:35:02,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:35:03,184 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 19:35:03,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:35:03,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843069119] [2024-11-16 19:35:03,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843069119] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:35:03,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450634909] [2024-11-16 19:35:03,186 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-16 19:35:03,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:35:03,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:35:03,189 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) [2024-11-16 19:35:03,191 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-16 19:35:03,257 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-16 19:35:03,257 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 19:35:03,261 INFO L255 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-16 19:35:03,263 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:35:03,296 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-16 19:35:03,564 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-16 19:35:03,577 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:35:03,577 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:35:04,532 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2024-11-16 19:35:04,540 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-16 19:35:04,541 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 41 [2024-11-16 19:35:04,571 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:35:04,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450634909] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 19:35:04,571 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 19:35:04,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 21 [2024-11-16 19:35:04,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702258975] [2024-11-16 19:35:04,571 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 19:35:04,572 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-16 19:35:04,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:35:04,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-16 19:35:04,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2024-11-16 19:35:04,613 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-11-16 19:35:04,613 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 81 transitions, 652 flow. Second operand has 21 states, 21 states have (on average 9.333333333333334) internal successors, (196), 21 states have internal predecessors, (196), 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) [2024-11-16 19:35:04,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:35:04,613 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-11-16 19:35:04,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:35:06,124 INFO L124 PetriNetUnfolderBase]: 439/901 cut-off events. [2024-11-16 19:35:06,124 INFO L125 PetriNetUnfolderBase]: For 3487/3487 co-relation queries the response was YES. [2024-11-16 19:35:06,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3408 conditions, 901 events. 439/901 cut-off events. For 3487/3487 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 4872 event pairs, 28 based on Foata normal form. 8/909 useless extension candidates. Maximal degree in co-relation 3384. Up to 257 conditions per place. [2024-11-16 19:35:06,139 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 105 selfloop transitions, 58 changer transitions 5/173 dead transitions. [2024-11-16 19:35:06,139 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 173 transitions, 1442 flow [2024-11-16 19:35:06,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-16 19:35:06,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-11-16 19:35:06,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 269 transitions. [2024-11-16 19:35:06,141 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4882032667876588 [2024-11-16 19:35:06,141 INFO L175 Difference]: Start difference. First operand has 77 places, 81 transitions, 652 flow. Second operand 19 states and 269 transitions. [2024-11-16 19:35:06,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 173 transitions, 1442 flow [2024-11-16 19:35:06,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 173 transitions, 1377 flow, removed 23 selfloop flow, removed 3 redundant places. [2024-11-16 19:35:06,154 INFO L231 Difference]: Finished difference. Result has 99 places, 99 transitions, 921 flow [2024-11-16 19:35:06,155 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=603, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=921, PETRI_PLACES=99, PETRI_TRANSITIONS=99} [2024-11-16 19:35:06,156 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 72 predicate places. [2024-11-16 19:35:06,156 INFO L471 AbstractCegarLoop]: Abstraction has has 99 places, 99 transitions, 921 flow [2024-11-16 19:35:06,156 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 9.333333333333334) internal successors, (196), 21 states have internal predecessors, (196), 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) [2024-11-16 19:35:06,156 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:35:06,157 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] [2024-11-16 19:35:06,170 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-16 19:35:06,360 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,SelfDestructingSolverStorable7 [2024-11-16 19:35:06,361 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:35:06,362 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:35:06,362 INFO L85 PathProgramCache]: Analyzing trace with hash -1903996357, now seen corresponding path program 3 times [2024-11-16 19:35:06,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:35:06,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459133305] [2024-11-16 19:35:06,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:35:06,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:35:06,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:35:06,555 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 19:35:06,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:35:06,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459133305] [2024-11-16 19:35:06,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459133305] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:35:06,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100354454] [2024-11-16 19:35:06,557 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-16 19:35:06,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:35:06,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:35:06,559 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) [2024-11-16 19:35:06,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-16 19:35:06,627 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-16 19:35:06,627 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 19:35:06,629 INFO L255 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-16 19:35:06,631 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:35:06,670 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-16 19:35:06,917 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-16 19:35:06,917 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 115 treesize of output 104 [2024-11-16 19:35:06,978 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:35:06,978 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:35:07,739 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2024-11-16 19:35:07,768 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-16 19:35:07,769 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 41 [2024-11-16 19:35:07,791 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 77 [2024-11-16 19:35:07,843 INFO L349 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2024-11-16 19:35:07,843 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 216 treesize of output 164 [2024-11-16 19:35:08,076 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:35:08,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100354454] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 19:35:08,077 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 19:35:08,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 22 [2024-11-16 19:35:08,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852792776] [2024-11-16 19:35:08,077 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 19:35:08,078 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-16 19:35:08,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:35:08,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-16 19:35:08,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2024-11-16 19:35:08,219 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-11-16 19:35:08,220 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 99 transitions, 921 flow. Second operand has 22 states, 22 states have (on average 8.227272727272727) internal successors, (181), 22 states have internal predecessors, (181), 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) [2024-11-16 19:35:08,220 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:35:08,220 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-11-16 19:35:08,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:35:10,223 INFO L124 PetriNetUnfolderBase]: 899/1829 cut-off events. [2024-11-16 19:35:10,223 INFO L125 PetriNetUnfolderBase]: For 10090/10090 co-relation queries the response was YES. [2024-11-16 19:35:10,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7797 conditions, 1829 events. 899/1829 cut-off events. For 10090/10090 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 11735 event pairs, 81 based on Foata normal form. 12/1839 useless extension candidates. Maximal degree in co-relation 7765. Up to 367 conditions per place. [2024-11-16 19:35:10,234 INFO L140 encePairwiseOnDemand]: 17/29 looper letters, 135 selfloop transitions, 83 changer transitions 93/315 dead transitions. [2024-11-16 19:35:10,234 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 315 transitions, 3019 flow [2024-11-16 19:35:10,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-11-16 19:35:10,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2024-11-16 19:35:10,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 415 transitions. [2024-11-16 19:35:10,236 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.46162402669632924 [2024-11-16 19:35:10,236 INFO L175 Difference]: Start difference. First operand has 99 places, 99 transitions, 921 flow. Second operand 31 states and 415 transitions. [2024-11-16 19:35:10,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 315 transitions, 3019 flow [2024-11-16 19:35:10,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 315 transitions, 2862 flow, removed 44 selfloop flow, removed 5 redundant places. [2024-11-16 19:35:10,262 INFO L231 Difference]: Finished difference. Result has 130 places, 124 transitions, 1297 flow [2024-11-16 19:35:10,263 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=843, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=1297, PETRI_PLACES=130, PETRI_TRANSITIONS=124} [2024-11-16 19:35:10,264 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 103 predicate places. [2024-11-16 19:35:10,264 INFO L471 AbstractCegarLoop]: Abstraction has has 130 places, 124 transitions, 1297 flow [2024-11-16 19:35:10,265 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 8.227272727272727) internal successors, (181), 22 states have internal predecessors, (181), 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) [2024-11-16 19:35:10,265 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:35:10,265 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] [2024-11-16 19:35:10,283 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-16 19:35:10,469 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:35:10,470 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:35:10,471 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:35:10,471 INFO L85 PathProgramCache]: Analyzing trace with hash 2143396811, now seen corresponding path program 4 times [2024-11-16 19:35:10,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:35:10,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242141295] [2024-11-16 19:35:10,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:35:10,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:35:10,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:35:10,648 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 19:35:10,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:35:10,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242141295] [2024-11-16 19:35:10,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242141295] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:35:10,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181076861] [2024-11-16 19:35:10,649 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-16 19:35:10,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:35:10,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:35:10,651 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) [2024-11-16 19:35:10,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-16 19:35:10,708 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-16 19:35:10,709 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 19:35:10,710 INFO L255 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-16 19:35:10,712 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:35:10,740 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-16 19:35:10,994 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-16 19:35:10,994 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 115 treesize of output 104 [2024-11-16 19:35:11,062 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:35:11,062 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:35:12,462 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2024-11-16 19:35:12,470 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-16 19:35:12,471 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 41 [2024-11-16 19:35:12,493 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 77 [2024-11-16 19:35:12,526 INFO L349 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2024-11-16 19:35:12,527 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 204 treesize of output 164 [2024-11-16 19:35:12,815 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:35:12,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181076861] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 19:35:12,816 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 19:35:12,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 21 [2024-11-16 19:35:12,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16880205] [2024-11-16 19:35:12,816 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 19:35:12,817 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-16 19:35:12,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:35:12,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-16 19:35:12,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2024-11-16 19:35:12,863 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-11-16 19:35:12,863 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 124 transitions, 1297 flow. Second operand has 21 states, 21 states have (on average 8.476190476190476) internal successors, (178), 21 states have internal predecessors, (178), 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) [2024-11-16 19:35:12,863 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:35:12,863 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-11-16 19:35:12,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:35:14,949 INFO L124 PetriNetUnfolderBase]: 693/1515 cut-off events. [2024-11-16 19:35:14,950 INFO L125 PetriNetUnfolderBase]: For 8514/8514 co-relation queries the response was YES. [2024-11-16 19:35:14,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6567 conditions, 1515 events. 693/1515 cut-off events. For 8514/8514 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 9873 event pairs, 74 based on Foata normal form. 13/1527 useless extension candidates. Maximal degree in co-relation 6527. Up to 565 conditions per place. [2024-11-16 19:35:14,964 INFO L140 encePairwiseOnDemand]: 17/29 looper letters, 138 selfloop transitions, 93 changer transitions 31/266 dead transitions. [2024-11-16 19:35:14,964 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 266 transitions, 2712 flow [2024-11-16 19:35:14,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-11-16 19:35:14,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2024-11-16 19:35:14,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 380 transitions. [2024-11-16 19:35:14,966 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4367816091954023 [2024-11-16 19:35:14,966 INFO L175 Difference]: Start difference. First operand has 130 places, 124 transitions, 1297 flow. Second operand 30 states and 380 transitions. [2024-11-16 19:35:14,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 266 transitions, 2712 flow [2024-11-16 19:35:14,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 266 transitions, 2592 flow, removed 15 selfloop flow, removed 12 redundant places. [2024-11-16 19:35:14,994 INFO L231 Difference]: Finished difference. Result has 152 places, 149 transitions, 1753 flow [2024-11-16 19:35:14,997 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1210, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=1753, PETRI_PLACES=152, PETRI_TRANSITIONS=149} [2024-11-16 19:35:14,998 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 125 predicate places. [2024-11-16 19:35:14,998 INFO L471 AbstractCegarLoop]: Abstraction has has 152 places, 149 transitions, 1753 flow [2024-11-16 19:35:14,998 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 8.476190476190476) internal successors, (178), 21 states have internal predecessors, (178), 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) [2024-11-16 19:35:14,998 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:35:14,998 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] [2024-11-16 19:35:15,013 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-16 19:35:15,199 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:35:15,201 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:35:15,201 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:35:15,201 INFO L85 PathProgramCache]: Analyzing trace with hash 1689226619, now seen corresponding path program 5 times [2024-11-16 19:35:15,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:35:15,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776875262] [2024-11-16 19:35:15,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:35:15,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:35:15,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:35:15,337 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 19:35:15,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:35:15,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776875262] [2024-11-16 19:35:15,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776875262] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:35:15,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294772756] [2024-11-16 19:35:15,338 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-16 19:35:15,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:35:15,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:35:15,340 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) [2024-11-16 19:35:15,342 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-16 19:35:15,400 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-16 19:35:15,401 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 19:35:15,402 INFO L255 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-16 19:35:15,404 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:35:15,434 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-16 19:35:15,662 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2024-11-16 19:35:15,681 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:35:15,681 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:35:16,895 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2024-11-16 19:35:16,902 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-16 19:35:16,903 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 41 [2024-11-16 19:35:16,917 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 77 [2024-11-16 19:35:16,949 INFO L349 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2024-11-16 19:35:16,950 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 204 treesize of output 164 [2024-11-16 19:35:17,148 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:35:17,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294772756] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 19:35:17,148 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 19:35:17,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 9] total 21 [2024-11-16 19:35:17,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144216368] [2024-11-16 19:35:17,149 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 19:35:17,149 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-16 19:35:17,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:35:17,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-16 19:35:17,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2024-11-16 19:35:17,165 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-11-16 19:35:17,166 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 149 transitions, 1753 flow. Second operand has 21 states, 21 states have (on average 8.333333333333334) internal successors, (175), 21 states have internal predecessors, (175), 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) [2024-11-16 19:35:17,166 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:35:17,166 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-11-16 19:35:17,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:35:19,631 INFO L124 PetriNetUnfolderBase]: 752/1709 cut-off events. [2024-11-16 19:35:19,631 INFO L125 PetriNetUnfolderBase]: For 12056/12056 co-relation queries the response was YES. [2024-11-16 19:35:19,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7850 conditions, 1709 events. 752/1709 cut-off events. For 12056/12056 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 11757 event pairs, 29 based on Foata normal form. 21/1729 useless extension candidates. Maximal degree in co-relation 7801. Up to 395 conditions per place. [2024-11-16 19:35:19,647 INFO L140 encePairwiseOnDemand]: 17/29 looper letters, 143 selfloop transitions, 104 changer transitions 86/337 dead transitions. [2024-11-16 19:35:19,647 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 337 transitions, 3626 flow [2024-11-16 19:35:19,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2024-11-16 19:35:19,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2024-11-16 19:35:19,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 511 transitions. [2024-11-16 19:35:19,653 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.40978348035284684 [2024-11-16 19:35:19,654 INFO L175 Difference]: Start difference. First operand has 152 places, 149 transitions, 1753 flow. Second operand 43 states and 511 transitions. [2024-11-16 19:35:19,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 337 transitions, 3626 flow [2024-11-16 19:35:19,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 337 transitions, 3480 flow, removed 41 selfloop flow, removed 11 redundant places. [2024-11-16 19:35:19,735 INFO L231 Difference]: Finished difference. Result has 196 places, 160 transitions, 2098 flow [2024-11-16 19:35:19,735 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1659, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=2098, PETRI_PLACES=196, PETRI_TRANSITIONS=160} [2024-11-16 19:35:19,735 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 169 predicate places. [2024-11-16 19:35:19,736 INFO L471 AbstractCegarLoop]: Abstraction has has 196 places, 160 transitions, 2098 flow [2024-11-16 19:35:19,736 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 8.333333333333334) internal successors, (175), 21 states have internal predecessors, (175), 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) [2024-11-16 19:35:19,736 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:35:19,737 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] [2024-11-16 19:35:19,751 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-16 19:35:19,937 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,SelfDestructingSolverStorable10 [2024-11-16 19:35:19,938 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:35:19,939 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:35:19,939 INFO L85 PathProgramCache]: Analyzing trace with hash 416292911, now seen corresponding path program 6 times [2024-11-16 19:35:19,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:35:19,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009841163] [2024-11-16 19:35:19,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:35:19,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:35:19,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:35:20,196 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 19:35:20,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:35:20,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009841163] [2024-11-16 19:35:20,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009841163] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:35:20,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446903978] [2024-11-16 19:35:20,196 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-16 19:35:20,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:35:20,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:35:20,202 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) [2024-11-16 19:35:20,208 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-16 19:35:20,275 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-16 19:35:20,275 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 19:35:20,276 INFO L255 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-16 19:35:20,279 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:35:20,343 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-16 19:35:20,642 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2024-11-16 19:35:20,664 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:35:20,664 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:35:21,517 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 77 [2024-11-16 19:35:21,546 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-16 19:35:21,546 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 202 treesize of output 192 [2024-11-16 19:35:22,825 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2024-11-16 19:35:22,831 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-11-16 19:35:22,832 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 1 [2024-11-16 19:35:22,882 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:35:22,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446903978] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 19:35:22,883 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 19:35:22,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 22 [2024-11-16 19:35:22,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944795255] [2024-11-16 19:35:22,884 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 19:35:22,884 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-16 19:35:22,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:35:22,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-16 19:35:22,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2024-11-16 19:35:22,930 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-11-16 19:35:22,931 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 160 transitions, 2098 flow. Second operand has 22 states, 22 states have (on average 8.227272727272727) internal successors, (181), 22 states have internal predecessors, (181), 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) [2024-11-16 19:35:22,931 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:35:22,931 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-11-16 19:35:22,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:35:24,622 INFO L124 PetriNetUnfolderBase]: 664/1502 cut-off events. [2024-11-16 19:35:24,622 INFO L125 PetriNetUnfolderBase]: For 13966/13966 co-relation queries the response was YES. [2024-11-16 19:35:24,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7686 conditions, 1502 events. 664/1502 cut-off events. For 13966/13966 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 10064 event pairs, 9 based on Foata normal form. 17/1516 useless extension candidates. Maximal degree in co-relation 7624. Up to 424 conditions per place. [2024-11-16 19:35:24,635 INFO L140 encePairwiseOnDemand]: 17/29 looper letters, 117 selfloop transitions, 121 changer transitions 35/277 dead transitions. [2024-11-16 19:35:24,636 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 277 transitions, 3512 flow [2024-11-16 19:35:24,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-11-16 19:35:24,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2024-11-16 19:35:24,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 402 transitions. [2024-11-16 19:35:24,637 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3746505125815471 [2024-11-16 19:35:24,637 INFO L175 Difference]: Start difference. First operand has 196 places, 160 transitions, 2098 flow. Second operand 37 states and 402 transitions. [2024-11-16 19:35:24,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 277 transitions, 3512 flow [2024-11-16 19:35:24,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 277 transitions, 3263 flow, removed 72 selfloop flow, removed 27 redundant places. [2024-11-16 19:35:24,673 INFO L231 Difference]: Finished difference. Result has 198 places, 179 transitions, 2547 flow [2024-11-16 19:35:24,674 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1910, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=2547, PETRI_PLACES=198, PETRI_TRANSITIONS=179} [2024-11-16 19:35:24,674 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 171 predicate places. [2024-11-16 19:35:24,674 INFO L471 AbstractCegarLoop]: Abstraction has has 198 places, 179 transitions, 2547 flow [2024-11-16 19:35:24,675 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 8.227272727272727) internal successors, (181), 22 states have internal predecessors, (181), 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) [2024-11-16 19:35:24,675 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:35:24,675 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] [2024-11-16 19:35:24,688 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-16 19:35:24,878 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:35:24,879 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:35:24,879 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:35:24,879 INFO L85 PathProgramCache]: Analyzing trace with hash 318515865, now seen corresponding path program 7 times [2024-11-16 19:35:24,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:35:24,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607449677] [2024-11-16 19:35:24,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:35:24,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:35:24,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:35:25,004 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 19:35:25,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:35:25,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607449677] [2024-11-16 19:35:25,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607449677] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:35:25,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151247603] [2024-11-16 19:35:25,006 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-16 19:35:25,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:35:25,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:35:25,011 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) [2024-11-16 19:35:25,014 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-16 19:35:25,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:35:25,077 INFO L255 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-16 19:35:25,079 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:35:25,105 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-16 19:35:25,327 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-16 19:35:25,327 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 115 treesize of output 104 [2024-11-16 19:35:25,441 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:35:25,441 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:35:26,577 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2024-11-16 19:35:26,585 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-16 19:35:26,586 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 41 [2024-11-16 19:35:26,598 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 77 [2024-11-16 19:35:26,631 INFO L349 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2024-11-16 19:35:26,632 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 204 treesize of output 164 [2024-11-16 19:35:27,051 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:35:27,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151247603] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 19:35:27,051 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 19:35:27,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 21 [2024-11-16 19:35:27,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927227969] [2024-11-16 19:35:27,052 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 19:35:27,052 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-16 19:35:27,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:35:27,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-16 19:35:27,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2024-11-16 19:35:27,085 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-11-16 19:35:27,085 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 179 transitions, 2547 flow. Second operand has 21 states, 21 states have (on average 8.380952380952381) internal successors, (176), 21 states have internal predecessors, (176), 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) [2024-11-16 19:35:27,085 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:35:27,085 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-11-16 19:35:27,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:35:28,924 INFO L124 PetriNetUnfolderBase]: 661/1489 cut-off events. [2024-11-16 19:35:28,925 INFO L125 PetriNetUnfolderBase]: For 15273/15273 co-relation queries the response was YES. [2024-11-16 19:35:28,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7912 conditions, 1489 events. 661/1489 cut-off events. For 15273/15273 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 9890 event pairs, 71 based on Foata normal form. 9/1495 useless extension candidates. Maximal degree in co-relation 7850. Up to 745 conditions per place. [2024-11-16 19:35:28,938 INFO L140 encePairwiseOnDemand]: 17/29 looper letters, 138 selfloop transitions, 84 changer transitions 38/264 dead transitions. [2024-11-16 19:35:28,938 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 264 transitions, 3610 flow [2024-11-16 19:35:28,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-16 19:35:28,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-11-16 19:35:28,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 309 transitions. [2024-11-16 19:35:28,940 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.40981432360742703 [2024-11-16 19:35:28,940 INFO L175 Difference]: Start difference. First operand has 198 places, 179 transitions, 2547 flow. Second operand 26 states and 309 transitions. [2024-11-16 19:35:28,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 264 transitions, 3610 flow [2024-11-16 19:35:28,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 264 transitions, 3376 flow, removed 55 selfloop flow, removed 25 redundant places. [2024-11-16 19:35:28,978 INFO L231 Difference]: Finished difference. Result has 200 places, 174 transitions, 2500 flow [2024-11-16 19:35:28,979 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=2346, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=2500, PETRI_PLACES=200, PETRI_TRANSITIONS=174} [2024-11-16 19:35:28,979 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 173 predicate places. [2024-11-16 19:35:28,979 INFO L471 AbstractCegarLoop]: Abstraction has has 200 places, 174 transitions, 2500 flow [2024-11-16 19:35:28,980 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 8.380952380952381) internal successors, (176), 21 states have internal predecessors, (176), 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) [2024-11-16 19:35:28,980 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:35:28,980 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] [2024-11-16 19:35:28,994 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-16 19:35:29,184 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:35:29,185 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:35:29,185 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:35:29,186 INFO L85 PathProgramCache]: Analyzing trace with hash 1483350433, now seen corresponding path program 8 times [2024-11-16 19:35:29,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:35:29,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527169703] [2024-11-16 19:35:29,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:35:29,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:35:29,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:35:29,381 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 19:35:29,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:35:29,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527169703] [2024-11-16 19:35:29,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527169703] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:35:29,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612937725] [2024-11-16 19:35:29,382 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-16 19:35:29,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:35:29,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:35:29,383 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) [2024-11-16 19:35:29,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-16 19:35:29,464 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-16 19:35:29,464 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 19:35:29,465 INFO L255 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-16 19:35:29,467 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:35:29,710 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-16 19:35:29,711 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 23 [2024-11-16 19:35:29,740 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 19:35:29,740 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:35:29,855 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-16 19:35:29,855 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 154 treesize of output 154 [2024-11-16 19:35:30,287 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 19:35:30,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612937725] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 19:35:30,287 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 19:35:30,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 20 [2024-11-16 19:35:30,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113654248] [2024-11-16 19:35:30,288 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 19:35:30,288 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-16 19:35:30,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:35:30,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-16 19:35:30,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2024-11-16 19:35:30,306 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-11-16 19:35:30,307 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 174 transitions, 2500 flow. Second operand has 20 states, 20 states have (on average 9.0) internal successors, (180), 20 states have internal predecessors, (180), 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) [2024-11-16 19:35:30,307 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:35:30,307 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-11-16 19:35:30,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:35:31,311 INFO L124 PetriNetUnfolderBase]: 748/1715 cut-off events. [2024-11-16 19:35:31,311 INFO L125 PetriNetUnfolderBase]: For 18112/18112 co-relation queries the response was YES. [2024-11-16 19:35:31,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9096 conditions, 1715 events. 748/1715 cut-off events. For 18112/18112 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 11876 event pairs, 42 based on Foata normal form. 12/1725 useless extension candidates. Maximal degree in co-relation 9035. Up to 526 conditions per place. [2024-11-16 19:35:31,353 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 153 selfloop transitions, 116 changer transitions 16/291 dead transitions. [2024-11-16 19:35:31,355 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 291 transitions, 4064 flow [2024-11-16 19:35:31,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-16 19:35:31,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-11-16 19:35:31,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 309 transitions. [2024-11-16 19:35:31,359 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4262068965517241 [2024-11-16 19:35:31,359 INFO L175 Difference]: Start difference. First operand has 200 places, 174 transitions, 2500 flow. Second operand 25 states and 309 transitions. [2024-11-16 19:35:31,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 291 transitions, 4064 flow [2024-11-16 19:35:31,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 291 transitions, 3913 flow, removed 33 selfloop flow, removed 21 redundant places. [2024-11-16 19:35:31,422 INFO L231 Difference]: Finished difference. Result has 203 places, 200 transitions, 3086 flow [2024-11-16 19:35:31,423 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=2362, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=3086, PETRI_PLACES=203, PETRI_TRANSITIONS=200} [2024-11-16 19:35:31,423 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 176 predicate places. [2024-11-16 19:35:31,423 INFO L471 AbstractCegarLoop]: Abstraction has has 203 places, 200 transitions, 3086 flow [2024-11-16 19:35:31,423 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 9.0) internal successors, (180), 20 states have internal predecessors, (180), 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) [2024-11-16 19:35:31,424 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:35:31,424 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:35:31,436 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-16 19:35:31,626 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,SelfDestructingSolverStorable13 [2024-11-16 19:35:31,627 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:35:31,627 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:35:31,627 INFO L85 PathProgramCache]: Analyzing trace with hash -2030911830, now seen corresponding path program 9 times [2024-11-16 19:35:31,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:35:31,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145502732] [2024-11-16 19:35:31,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:35:31,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:35:31,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:35:31,776 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-16 19:35:31,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:35:31,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145502732] [2024-11-16 19:35:31,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145502732] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:35:31,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503510327] [2024-11-16 19:35:31,776 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-16 19:35:31,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:35:31,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:35:31,778 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) [2024-11-16 19:35:31,781 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-16 19:35:31,880 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-16 19:35:31,880 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 19:35:31,885 INFO L255 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-16 19:35:31,887 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:35:32,089 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-16 19:35:32,089 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:35:35,538 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2024-11-16 19:35:35,555 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-16 19:35:35,556 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 7 [2024-11-16 19:35:35,578 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2024-11-16 19:35:35,588 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-16 19:35:35,588 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 7 [2024-11-16 19:35:35,630 INFO L349 Elim1Store]: treesize reduction 5, result has 84.8 percent of original size [2024-11-16 19:35:35,631 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 42 [2024-11-16 19:35:36,540 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-16 19:35:36,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503510327] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 19:35:36,541 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 19:35:36,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 8] total 18 [2024-11-16 19:35:36,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412943236] [2024-11-16 19:35:36,541 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 19:35:36,541 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-16 19:35:36,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:35:36,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-16 19:35:36,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2024-11-16 19:35:36,546 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-11-16 19:35:36,547 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 200 transitions, 3086 flow. Second operand has 18 states, 18 states have (on average 9.222222222222221) internal successors, (166), 18 states have internal predecessors, (166), 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) [2024-11-16 19:35:36,547 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:35:36,547 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-11-16 19:35:36,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:35:41,734 INFO L124 PetriNetUnfolderBase]: 853/1907 cut-off events. [2024-11-16 19:35:41,734 INFO L125 PetriNetUnfolderBase]: For 23187/23187 co-relation queries the response was YES. [2024-11-16 19:35:41,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10743 conditions, 1907 events. 853/1907 cut-off events. For 23187/23187 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 13450 event pairs, 103 based on Foata normal form. 5/1910 useless extension candidates. Maximal degree in co-relation 10678. Up to 1167 conditions per place. [2024-11-16 19:35:41,752 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 184 selfloop transitions, 83 changer transitions 16/289 dead transitions. [2024-11-16 19:35:41,752 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 289 transitions, 4346 flow [2024-11-16 19:35:41,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-16 19:35:41,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-11-16 19:35:41,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 266 transitions. [2024-11-16 19:35:41,755 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4586206896551724 [2024-11-16 19:35:41,755 INFO L175 Difference]: Start difference. First operand has 203 places, 200 transitions, 3086 flow. Second operand 20 states and 266 transitions. [2024-11-16 19:35:41,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 289 transitions, 4346 flow [2024-11-16 19:35:41,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 289 transitions, 4044 flow, removed 113 selfloop flow, removed 11 redundant places. [2024-11-16 19:35:41,824 INFO L231 Difference]: Finished difference. Result has 219 places, 224 transitions, 3439 flow [2024-11-16 19:35:41,824 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=2859, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=3439, PETRI_PLACES=219, PETRI_TRANSITIONS=224} [2024-11-16 19:35:41,825 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 192 predicate places. [2024-11-16 19:35:41,825 INFO L471 AbstractCegarLoop]: Abstraction has has 219 places, 224 transitions, 3439 flow [2024-11-16 19:35:41,825 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 9.222222222222221) internal successors, (166), 18 states have internal predecessors, (166), 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) [2024-11-16 19:35:41,825 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:35:41,825 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:35:41,838 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-16 19:35:42,026 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,SelfDestructingSolverStorable14 [2024-11-16 19:35:42,026 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:35:42,027 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:35:42,027 INFO L85 PathProgramCache]: Analyzing trace with hash -2013368266, now seen corresponding path program 10 times [2024-11-16 19:35:42,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:35:42,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367661510] [2024-11-16 19:35:42,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:35:42,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:35:42,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:35:42,308 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-16 19:35:42,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:35:42,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367661510] [2024-11-16 19:35:42,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367661510] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:35:42,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984313706] [2024-11-16 19:35:42,309 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-16 19:35:42,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:35:42,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:35:42,311 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) [2024-11-16 19:35:42,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-16 19:35:42,384 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-16 19:35:42,384 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 19:35:42,385 INFO L255 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-16 19:35:42,391 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:35:42,519 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-16 19:35:42,519 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 117 treesize of output 109 [2024-11-16 19:35:42,657 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-16 19:35:42,658 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:35:43,053 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-16 19:35:43,054 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 150 treesize of output 119 [2024-11-16 19:35:43,365 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-16 19:35:43,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984313706] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 19:35:43,366 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 19:35:43,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2024-11-16 19:35:43,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514080978] [2024-11-16 19:35:43,366 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 19:35:43,366 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-16 19:35:43,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:35:43,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-16 19:35:43,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2024-11-16 19:35:43,386 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-11-16 19:35:43,386 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 224 transitions, 3439 flow. Second operand has 18 states, 18 states have (on average 9.61111111111111) internal successors, (173), 18 states have internal predecessors, (173), 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) [2024-11-16 19:35:43,387 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:35:43,387 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-11-16 19:35:43,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:35:44,153 INFO L124 PetriNetUnfolderBase]: 830/1841 cut-off events. [2024-11-16 19:35:44,153 INFO L125 PetriNetUnfolderBase]: For 19388/19388 co-relation queries the response was YES. [2024-11-16 19:35:44,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10143 conditions, 1841 events. 830/1841 cut-off events. For 19388/19388 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 12715 event pairs, 115 based on Foata normal form. 2/1843 useless extension candidates. Maximal degree in co-relation 10073. Up to 1246 conditions per place. [2024-11-16 19:35:44,171 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 193 selfloop transitions, 57 changer transitions 5/261 dead transitions. [2024-11-16 19:35:44,171 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 261 transitions, 4105 flow [2024-11-16 19:35:44,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-16 19:35:44,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-16 19:35:44,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 185 transitions. [2024-11-16 19:35:44,172 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45566502463054187 [2024-11-16 19:35:44,172 INFO L175 Difference]: Start difference. First operand has 219 places, 224 transitions, 3439 flow. Second operand 14 states and 185 transitions. [2024-11-16 19:35:44,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 261 transitions, 4105 flow [2024-11-16 19:35:44,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 261 transitions, 3931 flow, removed 20 selfloop flow, removed 17 redundant places. [2024-11-16 19:35:44,232 INFO L231 Difference]: Finished difference. Result has 214 places, 223 transitions, 3370 flow [2024-11-16 19:35:44,232 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=3252, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=3370, PETRI_PLACES=214, PETRI_TRANSITIONS=223} [2024-11-16 19:35:44,233 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 187 predicate places. [2024-11-16 19:35:44,233 INFO L471 AbstractCegarLoop]: Abstraction has has 214 places, 223 transitions, 3370 flow [2024-11-16 19:35:44,233 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 9.61111111111111) internal successors, (173), 18 states have internal predecessors, (173), 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) [2024-11-16 19:35:44,234 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:35:44,234 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:35:44,246 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-16 19:35:44,437 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,SelfDestructingSolverStorable15 [2024-11-16 19:35:44,438 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:35:44,438 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:35:44,438 INFO L85 PathProgramCache]: Analyzing trace with hash -1788554378, now seen corresponding path program 1 times [2024-11-16 19:35:44,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:35:44,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782957258] [2024-11-16 19:35:44,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:35:44,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:35:44,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:35:44,619 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-16 19:35:44,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:35:44,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782957258] [2024-11-16 19:35:44,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782957258] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:35:44,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106858057] [2024-11-16 19:35:44,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:35:44,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:35:44,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:35:44,625 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) [2024-11-16 19:35:44,626 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-16 19:35:44,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:35:44,812 INFO L255 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-16 19:35:44,813 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:35:44,891 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-16 19:35:44,891 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:35:45,021 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-16 19:35:45,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106858057] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 19:35:45,025 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 19:35:45,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-16 19:35:45,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364671045] [2024-11-16 19:35:45,026 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 19:35:45,026 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-16 19:35:45,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:35:45,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-16 19:35:45,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2024-11-16 19:35:45,042 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-11-16 19:35:45,043 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 223 transitions, 3370 flow. Second operand has 13 states, 13 states have (on average 9.307692307692308) internal successors, (121), 13 states have internal predecessors, (121), 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) [2024-11-16 19:35:45,043 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:35:45,043 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-11-16 19:35:45,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:35:46,393 INFO L124 PetriNetUnfolderBase]: 848/1877 cut-off events. [2024-11-16 19:35:46,393 INFO L125 PetriNetUnfolderBase]: For 18411/18411 co-relation queries the response was YES. [2024-11-16 19:35:46,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10209 conditions, 1877 events. 848/1877 cut-off events. For 18411/18411 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 13007 event pairs, 172 based on Foata normal form. 20/1878 useless extension candidates. Maximal degree in co-relation 10145. Up to 605 conditions per place. [2024-11-16 19:35:46,431 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 158 selfloop transitions, 154 changer transitions 1/319 dead transitions. [2024-11-16 19:35:46,432 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 319 transitions, 4762 flow [2024-11-16 19:35:46,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-16 19:35:46,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-11-16 19:35:46,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 213 transitions. [2024-11-16 19:35:46,434 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45905172413793105 [2024-11-16 19:35:46,434 INFO L175 Difference]: Start difference. First operand has 214 places, 223 transitions, 3370 flow. Second operand 16 states and 213 transitions. [2024-11-16 19:35:46,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 319 transitions, 4762 flow [2024-11-16 19:35:46,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 319 transitions, 4652 flow, removed 1 selfloop flow, removed 10 redundant places. [2024-11-16 19:35:46,555 INFO L231 Difference]: Finished difference. Result has 222 places, 254 transitions, 3959 flow [2024-11-16 19:35:46,555 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=3265, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=3959, PETRI_PLACES=222, PETRI_TRANSITIONS=254} [2024-11-16 19:35:46,556 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 195 predicate places. [2024-11-16 19:35:46,556 INFO L471 AbstractCegarLoop]: Abstraction has has 222 places, 254 transitions, 3959 flow [2024-11-16 19:35:46,556 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 9.307692307692308) internal successors, (121), 13 states have internal predecessors, (121), 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) [2024-11-16 19:35:46,556 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:35:46,556 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:35:46,592 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-16 19:35:46,761 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,SelfDestructingSolverStorable16 [2024-11-16 19:35:46,763 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:35:46,764 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:35:46,764 INFO L85 PathProgramCache]: Analyzing trace with hash 455470, now seen corresponding path program 2 times [2024-11-16 19:35:46,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:35:46,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828631384] [2024-11-16 19:35:46,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:35:46,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:35:46,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:35:46,939 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-16 19:35:46,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:35:46,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828631384] [2024-11-16 19:35:46,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828631384] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:35:46,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123774521] [2024-11-16 19:35:46,943 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-16 19:35:46,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:35:46,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:35:46,945 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) [2024-11-16 19:35:46,946 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-16 19:35:47,150 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-16 19:35:47,151 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 19:35:47,156 INFO L255 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-16 19:35:47,158 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:35:47,224 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-16 19:35:47,227 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:35:47,424 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-16 19:35:47,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123774521] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 19:35:47,425 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 19:35:47,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-11-16 19:35:47,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478469191] [2024-11-16 19:35:47,425 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 19:35:47,426 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-16 19:35:47,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:35:47,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-16 19:35:47,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2024-11-16 19:35:47,442 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-11-16 19:35:47,443 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 254 transitions, 3959 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 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) [2024-11-16 19:35:47,443 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:35:47,443 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-11-16 19:35:47,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:35:50,212 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-16 19:35:50,632 INFO L124 PetriNetUnfolderBase]: 873/1950 cut-off events. [2024-11-16 19:35:50,636 INFO L125 PetriNetUnfolderBase]: For 21132/21132 co-relation queries the response was YES. [2024-11-16 19:35:50,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11058 conditions, 1950 events. 873/1950 cut-off events. For 21132/21132 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 13896 event pairs, 175 based on Foata normal form. 30/1961 useless extension candidates. Maximal degree in co-relation 10990. Up to 605 conditions per place. [2024-11-16 19:35:50,675 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 165 selfloop transitions, 161 changer transitions 1/333 dead transitions. [2024-11-16 19:35:50,679 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 333 transitions, 5144 flow [2024-11-16 19:35:50,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-16 19:35:50,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-11-16 19:35:50,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 249 transitions. [2024-11-16 19:35:50,681 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.47701149425287354 [2024-11-16 19:35:50,681 INFO L175 Difference]: Start difference. First operand has 222 places, 254 transitions, 3959 flow. Second operand 18 states and 249 transitions. [2024-11-16 19:35:50,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 333 transitions, 5144 flow [2024-11-16 19:35:50,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 333 transitions, 4986 flow, removed 41 selfloop flow, removed 10 redundant places. [2024-11-16 19:35:50,783 INFO L231 Difference]: Finished difference. Result has 235 places, 263 transitions, 4325 flow [2024-11-16 19:35:50,783 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=3791, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=4325, PETRI_PLACES=235, PETRI_TRANSITIONS=263} [2024-11-16 19:35:50,784 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 208 predicate places. [2024-11-16 19:35:50,784 INFO L471 AbstractCegarLoop]: Abstraction has has 235 places, 263 transitions, 4325 flow [2024-11-16 19:35:50,784 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 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) [2024-11-16 19:35:50,784 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:35:50,785 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:35:50,797 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-16 19:35:50,988 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,SelfDestructingSolverStorable17 [2024-11-16 19:35:50,989 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:35:50,989 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:35:50,989 INFO L85 PathProgramCache]: Analyzing trace with hash 120602870, now seen corresponding path program 3 times [2024-11-16 19:35:50,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:35:50,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424581028] [2024-11-16 19:35:50,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:35:50,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:35:51,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:35:51,277 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-16 19:35:51,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:35:51,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424581028] [2024-11-16 19:35:51,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424581028] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:35:51,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821250257] [2024-11-16 19:35:51,278 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-16 19:35:51,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:35:51,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:35:51,282 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) [2024-11-16 19:35:51,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-16 19:35:51,374 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-16 19:35:51,374 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 19:35:51,376 INFO L255 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-16 19:35:51,377 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:35:51,484 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-16 19:35:51,485 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:35:51,664 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-16 19:35:51,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821250257] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 19:35:51,664 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 19:35:51,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-11-16 19:35:51,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655287658] [2024-11-16 19:35:51,665 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 19:35:51,665 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-16 19:35:51,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:35:51,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-16 19:35:51,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2024-11-16 19:35:51,680 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-11-16 19:35:51,680 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 263 transitions, 4325 flow. Second operand has 12 states, 12 states have (on average 9.083333333333334) internal successors, (109), 12 states have internal predecessors, (109), 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) [2024-11-16 19:35:51,681 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:35:51,681 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-11-16 19:35:51,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:35:52,669 INFO L124 PetriNetUnfolderBase]: 999/2205 cut-off events. [2024-11-16 19:35:52,669 INFO L125 PetriNetUnfolderBase]: For 25331/25331 co-relation queries the response was YES. [2024-11-16 19:35:52,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12845 conditions, 2205 events. 999/2205 cut-off events. For 25331/25331 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 16043 event pairs, 251 based on Foata normal form. 35/2219 useless extension candidates. Maximal degree in co-relation 12778. Up to 827 conditions per place. [2024-11-16 19:35:52,702 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 224 selfloop transitions, 143 changer transitions 0/373 dead transitions. [2024-11-16 19:35:52,703 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 373 transitions, 6076 flow [2024-11-16 19:35:52,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-16 19:35:52,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-11-16 19:35:52,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 274 transitions. [2024-11-16 19:35:52,703 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.49727767695099817 [2024-11-16 19:35:52,704 INFO L175 Difference]: Start difference. First operand has 235 places, 263 transitions, 4325 flow. Second operand 19 states and 274 transitions. [2024-11-16 19:35:52,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 373 transitions, 6076 flow [2024-11-16 19:35:52,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 373 transitions, 5866 flow, removed 53 selfloop flow, removed 7 redundant places. [2024-11-16 19:35:52,905 INFO L231 Difference]: Finished difference. Result has 254 places, 298 transitions, 5166 flow [2024-11-16 19:35:52,905 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=4043, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=5166, PETRI_PLACES=254, PETRI_TRANSITIONS=298} [2024-11-16 19:35:52,906 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 227 predicate places. [2024-11-16 19:35:52,906 INFO L471 AbstractCegarLoop]: Abstraction has has 254 places, 298 transitions, 5166 flow [2024-11-16 19:35:52,906 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.083333333333334) internal successors, (109), 12 states have internal predecessors, (109), 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) [2024-11-16 19:35:52,906 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:35:52,906 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:35:52,924 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-16 19:35:53,106 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:35:53,107 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:35:53,107 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:35:53,107 INFO L85 PathProgramCache]: Analyzing trace with hash 864321782, now seen corresponding path program 4 times [2024-11-16 19:35:53,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:35:53,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289223581] [2024-11-16 19:35:53,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:35:53,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:35:53,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:35:53,370 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-16 19:35:53,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:35:53,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289223581] [2024-11-16 19:35:53,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289223581] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:35:53,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092133691] [2024-11-16 19:35:53,371 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-16 19:35:53,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:35:53,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:35:53,373 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) [2024-11-16 19:35:53,374 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-16 19:35:53,472 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-16 19:35:53,472 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 19:35:53,473 INFO L255 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-16 19:35:53,474 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:35:53,520 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-16 19:35:53,521 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:35:53,635 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-16 19:35:53,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2092133691] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 19:35:53,635 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 19:35:53,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 13 [2024-11-16 19:35:53,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524637050] [2024-11-16 19:35:53,635 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 19:35:53,636 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-16 19:35:53,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:35:53,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-16 19:35:53,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2024-11-16 19:35:53,650 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-11-16 19:35:53,651 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 298 transitions, 5166 flow. Second operand has 13 states, 13 states have (on average 9.076923076923077) internal successors, (118), 13 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) [2024-11-16 19:35:53,651 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:35:53,651 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-11-16 19:35:53,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:35:54,646 INFO L124 PetriNetUnfolderBase]: 963/2150 cut-off events. [2024-11-16 19:35:54,647 INFO L125 PetriNetUnfolderBase]: For 27707/27707 co-relation queries the response was YES. [2024-11-16 19:35:54,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12925 conditions, 2150 events. 963/2150 cut-off events. For 27707/27707 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 15621 event pairs, 260 based on Foata normal form. 20/2149 useless extension candidates. Maximal degree in co-relation 12852. Up to 831 conditions per place. [2024-11-16 19:35:54,669 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 219 selfloop transitions, 137 changer transitions 0/362 dead transitions. [2024-11-16 19:35:54,669 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 362 transitions, 6235 flow [2024-11-16 19:35:54,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-16 19:35:54,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-11-16 19:35:54,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 265 transitions. [2024-11-16 19:35:54,670 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4809437386569873 [2024-11-16 19:35:54,670 INFO L175 Difference]: Start difference. First operand has 254 places, 298 transitions, 5166 flow. Second operand 19 states and 265 transitions. [2024-11-16 19:35:54,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 362 transitions, 6235 flow [2024-11-16 19:35:54,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 362 transitions, 5909 flow, removed 85 selfloop flow, removed 7 redundant places. [2024-11-16 19:35:54,781 INFO L231 Difference]: Finished difference. Result has 271 places, 299 transitions, 5207 flow [2024-11-16 19:35:54,781 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=4690, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=5207, PETRI_PLACES=271, PETRI_TRANSITIONS=299} [2024-11-16 19:35:54,782 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 244 predicate places. [2024-11-16 19:35:54,782 INFO L471 AbstractCegarLoop]: Abstraction has has 271 places, 299 transitions, 5207 flow [2024-11-16 19:35:54,782 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 9.076923076923077) internal successors, (118), 13 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) [2024-11-16 19:35:54,782 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:35:54,782 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:35:54,800 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-16 19:35:54,982 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:35:54,983 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:35:54,983 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:35:54,983 INFO L85 PathProgramCache]: Analyzing trace with hash 1008665322, now seen corresponding path program 11 times [2024-11-16 19:35:54,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:35:54,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332402076] [2024-11-16 19:35:54,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:35:54,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:35:54,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:35:55,123 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-16 19:35:55,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:35:55,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332402076] [2024-11-16 19:35:55,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332402076] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:35:55,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242589459] [2024-11-16 19:35:55,124 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-16 19:35:55,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:35:55,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:35:55,126 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) [2024-11-16 19:35:55,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-16 19:35:55,429 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-16 19:35:55,430 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 19:35:55,432 INFO L255 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-16 19:35:55,434 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:35:55,458 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-16 19:35:55,485 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-11-16 19:35:55,814 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-16 19:35:55,815 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 114 treesize of output 106 [2024-11-16 19:35:55,939 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:35:55,940 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:35:58,801 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-16 19:35:58,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242589459] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 19:35:58,801 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 19:35:58,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 8] total 21 [2024-11-16 19:35:58,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771909357] [2024-11-16 19:35:58,801 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 19:35:58,802 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-16 19:35:58,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:35:58,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-16 19:35:58,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2024-11-16 19:35:58,848 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-11-16 19:35:58,849 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 299 transitions, 5207 flow. Second operand has 21 states, 21 states have (on average 8.952380952380953) internal successors, (188), 21 states have internal predecessors, (188), 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) [2024-11-16 19:35:58,849 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:35:58,849 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-11-16 19:35:58,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:36:05,533 INFO L124 PetriNetUnfolderBase]: 1084/2399 cut-off events. [2024-11-16 19:36:05,533 INFO L125 PetriNetUnfolderBase]: For 31179/31179 co-relation queries the response was YES. [2024-11-16 19:36:05,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14412 conditions, 2399 events. 1084/2399 cut-off events. For 31179/31179 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 17717 event pairs, 97 based on Foata normal form. 6/2403 useless extension candidates. Maximal degree in co-relation 14334. Up to 1146 conditions per place. [2024-11-16 19:36:05,554 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 245 selfloop transitions, 182 changer transitions 11/444 dead transitions. [2024-11-16 19:36:05,555 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 444 transitions, 7383 flow [2024-11-16 19:36:05,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-11-16 19:36:05,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2024-11-16 19:36:05,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 427 transitions. [2024-11-16 19:36:05,556 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.44618599791013586 [2024-11-16 19:36:05,556 INFO L175 Difference]: Start difference. First operand has 271 places, 299 transitions, 5207 flow. Second operand 33 states and 427 transitions. [2024-11-16 19:36:05,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 444 transitions, 7383 flow [2024-11-16 19:36:05,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 444 transitions, 7122 flow, removed 30 selfloop flow, removed 10 redundant places. [2024-11-16 19:36:05,664 INFO L231 Difference]: Finished difference. Result has 302 places, 342 transitions, 6268 flow [2024-11-16 19:36:05,665 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=4969, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=6268, PETRI_PLACES=302, PETRI_TRANSITIONS=342} [2024-11-16 19:36:05,665 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 275 predicate places. [2024-11-16 19:36:05,666 INFO L471 AbstractCegarLoop]: Abstraction has has 302 places, 342 transitions, 6268 flow [2024-11-16 19:36:05,666 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 8.952380952380953) internal successors, (188), 21 states have internal predecessors, (188), 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) [2024-11-16 19:36:05,666 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:36:05,666 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:36:05,679 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-16 19:36:05,870 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:36:05,871 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:36:05,871 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:36:05,871 INFO L85 PathProgramCache]: Analyzing trace with hash -286167226, now seen corresponding path program 12 times [2024-11-16 19:36:05,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:36:05,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136013414] [2024-11-16 19:36:05,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:36:05,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:36:05,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:36:06,001 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-16 19:36:06,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:36:06,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136013414] [2024-11-16 19:36:06,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136013414] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:36:06,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071628068] [2024-11-16 19:36:06,002 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-16 19:36:06,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:36:06,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:36:06,003 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) [2024-11-16 19:36:06,004 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-16 19:36:06,083 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-16 19:36:06,083 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 19:36:06,084 INFO L255 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-16 19:36:06,086 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:36:06,266 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-16 19:36:06,267 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:36:07,100 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-16 19:36:07,101 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 166 treesize of output 135 [2024-11-16 19:36:08,686 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-16 19:36:08,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071628068] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 19:36:08,687 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 19:36:08,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 8] total 18 [2024-11-16 19:36:08,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177322079] [2024-11-16 19:36:08,687 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 19:36:08,687 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-16 19:36:08,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:36:08,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-16 19:36:08,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2024-11-16 19:36:08,758 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-11-16 19:36:08,758 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 342 transitions, 6268 flow. Second operand has 18 states, 18 states have (on average 9.277777777777779) internal successors, (167), 18 states have internal predecessors, (167), 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) [2024-11-16 19:36:08,758 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:36:08,758 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-11-16 19:36:08,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:36:11,758 INFO L124 PetriNetUnfolderBase]: 1121/2460 cut-off events. [2024-11-16 19:36:11,758 INFO L125 PetriNetUnfolderBase]: For 34904/34904 co-relation queries the response was YES. [2024-11-16 19:36:11,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15457 conditions, 2460 events. 1121/2460 cut-off events. For 34904/34904 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 18153 event pairs, 101 based on Foata normal form. 9/2467 useless extension candidates. Maximal degree in co-relation 15373. Up to 1009 conditions per place. [2024-11-16 19:36:11,786 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 241 selfloop transitions, 157 changer transitions 25/429 dead transitions. [2024-11-16 19:36:11,786 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 429 transitions, 7672 flow [2024-11-16 19:36:11,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-16 19:36:11,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-11-16 19:36:11,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 331 transitions. [2024-11-16 19:36:11,787 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45655172413793105 [2024-11-16 19:36:11,788 INFO L175 Difference]: Start difference. First operand has 302 places, 342 transitions, 6268 flow. Second operand 25 states and 331 transitions. [2024-11-16 19:36:11,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 429 transitions, 7672 flow [2024-11-16 19:36:11,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 429 transitions, 7376 flow, removed 104 selfloop flow, removed 15 redundant places. [2024-11-16 19:36:11,931 INFO L231 Difference]: Finished difference. Result has 317 places, 348 transitions, 6570 flow [2024-11-16 19:36:11,931 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=5957, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=340, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=6570, PETRI_PLACES=317, PETRI_TRANSITIONS=348} [2024-11-16 19:36:11,932 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 290 predicate places. [2024-11-16 19:36:11,932 INFO L471 AbstractCegarLoop]: Abstraction has has 317 places, 348 transitions, 6570 flow [2024-11-16 19:36:11,932 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 9.277777777777779) internal successors, (167), 18 states have internal predecessors, (167), 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) [2024-11-16 19:36:11,932 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:36:11,932 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:36:11,947 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-11-16 19:36:12,136 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-11-16 19:36:12,137 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:36:12,137 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:36:12,137 INFO L85 PathProgramCache]: Analyzing trace with hash 1347194478, now seen corresponding path program 5 times [2024-11-16 19:36:12,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:36:12,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339610630] [2024-11-16 19:36:12,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:36:12,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:36:12,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:36:12,265 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-16 19:36:12,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:36:12,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339610630] [2024-11-16 19:36:12,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339610630] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:36:12,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661180488] [2024-11-16 19:36:12,266 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-16 19:36:12,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:36:12,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:36:12,268 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) [2024-11-16 19:36:12,269 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-16 19:36:12,367 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-16 19:36:12,367 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 19:36:12,369 INFO L255 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-16 19:36:12,370 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:36:12,418 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-16 19:36:12,419 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:36:12,527 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-16 19:36:12,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661180488] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 19:36:12,527 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 19:36:12,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-11-16 19:36:12,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962744650] [2024-11-16 19:36:12,528 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 19:36:12,528 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-16 19:36:12,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:36:12,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-16 19:36:12,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2024-11-16 19:36:12,544 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-11-16 19:36:12,545 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 348 transitions, 6570 flow. Second operand has 12 states, 12 states have (on average 9.083333333333334) internal successors, (109), 12 states have internal predecessors, (109), 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) [2024-11-16 19:36:12,545 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:36:12,545 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-11-16 19:36:12,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:36:13,419 INFO L124 PetriNetUnfolderBase]: 1259/2726 cut-off events. [2024-11-16 19:36:13,419 INFO L125 PetriNetUnfolderBase]: For 43561/43561 co-relation queries the response was YES. [2024-11-16 19:36:13,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17616 conditions, 2726 events. 1259/2726 cut-off events. For 43561/43561 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 20339 event pairs, 279 based on Foata normal form. 18/2736 useless extension candidates. Maximal degree in co-relation 17525. Up to 1043 conditions per place. [2024-11-16 19:36:13,452 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 271 selfloop transitions, 180 changer transitions 0/457 dead transitions. [2024-11-16 19:36:13,452 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 457 transitions, 8759 flow [2024-11-16 19:36:13,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-16 19:36:13,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-16 19:36:13,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 238 transitions. [2024-11-16 19:36:13,453 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4827586206896552 [2024-11-16 19:36:13,453 INFO L175 Difference]: Start difference. First operand has 317 places, 348 transitions, 6570 flow. Second operand 17 states and 238 transitions. [2024-11-16 19:36:13,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 457 transitions, 8759 flow [2024-11-16 19:36:13,624 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 457 transitions, 8502 flow, removed 68 selfloop flow, removed 12 redundant places. [2024-11-16 19:36:13,632 INFO L231 Difference]: Finished difference. Result has 323 places, 386 transitions, 7633 flow [2024-11-16 19:36:13,632 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=6284, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=7633, PETRI_PLACES=323, PETRI_TRANSITIONS=386} [2024-11-16 19:36:13,633 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 296 predicate places. [2024-11-16 19:36:13,633 INFO L471 AbstractCegarLoop]: Abstraction has has 323 places, 386 transitions, 7633 flow [2024-11-16 19:36:13,633 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.083333333333334) internal successors, (109), 12 states have internal predecessors, (109), 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) [2024-11-16 19:36:13,633 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:36:13,633 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:36:13,647 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-16 19:36:13,834 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:36:13,834 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:36:13,834 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:36:13,834 INFO L85 PathProgramCache]: Analyzing trace with hash -1466909458, now seen corresponding path program 6 times [2024-11-16 19:36:13,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:36:13,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468501634] [2024-11-16 19:36:13,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:36:13,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:36:13,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:36:13,932 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-16 19:36:13,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:36:13,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468501634] [2024-11-16 19:36:13,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468501634] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:36:13,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060180842] [2024-11-16 19:36:13,933 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-16 19:36:13,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:36:13,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:36:13,937 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 19:36:13,940 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-16 19:36:14,051 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-16 19:36:14,051 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 19:36:14,053 INFO L255 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-16 19:36:14,053 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:36:14,093 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-16 19:36:14,093 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:36:14,223 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-16 19:36:14,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060180842] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 19:36:14,224 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 19:36:14,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-11-16 19:36:14,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896335526] [2024-11-16 19:36:14,224 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 19:36:14,224 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-16 19:36:14,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:36:14,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-16 19:36:14,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2024-11-16 19:36:14,228 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-11-16 19:36:14,228 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 386 transitions, 7633 flow. Second operand has 12 states, 12 states have (on average 9.416666666666666) internal successors, (113), 12 states have internal predecessors, (113), 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) [2024-11-16 19:36:14,229 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:36:14,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-11-16 19:36:14,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:36:18,665 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-16 19:36:19,337 INFO L124 PetriNetUnfolderBase]: 1254/2727 cut-off events. [2024-11-16 19:36:19,337 INFO L125 PetriNetUnfolderBase]: For 49425/49425 co-relation queries the response was YES. [2024-11-16 19:36:19,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18471 conditions, 2727 events. 1254/2727 cut-off events. For 49425/49425 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 20459 event pairs, 217 based on Foata normal form. 25/2744 useless extension candidates. Maximal degree in co-relation 18375. Up to 1039 conditions per place. [2024-11-16 19:36:19,378 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 238 selfloop transitions, 205 changer transitions 1/450 dead transitions. [2024-11-16 19:36:19,379 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 450 transitions, 9040 flow [2024-11-16 19:36:19,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-16 19:36:19,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-11-16 19:36:19,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 237 transitions. [2024-11-16 19:36:19,380 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4540229885057471 [2024-11-16 19:36:19,380 INFO L175 Difference]: Start difference. First operand has 323 places, 386 transitions, 7633 flow. Second operand 18 states and 237 transitions. [2024-11-16 19:36:19,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 450 transitions, 9040 flow [2024-11-16 19:36:19,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 450 transitions, 8799 flow, removed 73 selfloop flow, removed 8 redundant places. [2024-11-16 19:36:19,631 INFO L231 Difference]: Finished difference. Result has 334 places, 389 transitions, 7917 flow [2024-11-16 19:36:19,631 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=7377, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=383, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=200, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=7917, PETRI_PLACES=334, PETRI_TRANSITIONS=389} [2024-11-16 19:36:19,632 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 307 predicate places. [2024-11-16 19:36:19,632 INFO L471 AbstractCegarLoop]: Abstraction has has 334 places, 389 transitions, 7917 flow [2024-11-16 19:36:19,632 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.416666666666666) internal successors, (113), 12 states have internal predecessors, (113), 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) [2024-11-16 19:36:19,633 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:36:19,633 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:36:19,651 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-11-16 19:36:19,833 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:36:19,834 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:36:19,834 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:36:19,834 INFO L85 PathProgramCache]: Analyzing trace with hash 1611656118, now seen corresponding path program 7 times [2024-11-16 19:36:19,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:36:19,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075305049] [2024-11-16 19:36:19,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:36:19,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:36:19,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:36:19,984 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-16 19:36:19,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:36:19,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075305049] [2024-11-16 19:36:19,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075305049] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:36:19,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732254609] [2024-11-16 19:36:19,984 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-16 19:36:19,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:36:19,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:36:19,986 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 19:36:19,988 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-16 19:36:20,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:36:20,094 INFO L255 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-16 19:36:20,095 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:36:20,155 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-16 19:36:20,155 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:36:20,222 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-16 19:36:20,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732254609] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 19:36:20,223 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 19:36:20,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 14 [2024-11-16 19:36:20,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882880974] [2024-11-16 19:36:20,223 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 19:36:20,224 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-16 19:36:20,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:36:20,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-16 19:36:20,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2024-11-16 19:36:20,232 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-11-16 19:36:20,232 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 389 transitions, 7917 flow. Second operand has 14 states, 14 states have (on average 9.0) internal successors, (126), 14 states have internal predecessors, (126), 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) [2024-11-16 19:36:20,233 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:36:20,233 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-11-16 19:36:20,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:36:21,504 INFO L124 PetriNetUnfolderBase]: 1574/3386 cut-off events. [2024-11-16 19:36:21,504 INFO L125 PetriNetUnfolderBase]: For 60296/60296 co-relation queries the response was YES. [2024-11-16 19:36:21,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23222 conditions, 3386 events. 1574/3386 cut-off events. For 60296/60296 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 26185 event pairs, 125 based on Foata normal form. 18/3402 useless extension candidates. Maximal degree in co-relation 23124. Up to 797 conditions per place. [2024-11-16 19:36:21,549 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 292 selfloop transitions, 248 changer transitions 0/546 dead transitions. [2024-11-16 19:36:21,550 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 546 transitions, 11331 flow [2024-11-16 19:36:21,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-16 19:36:21,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-11-16 19:36:21,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 264 transitions. [2024-11-16 19:36:21,551 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4791288566243194 [2024-11-16 19:36:21,551 INFO L175 Difference]: Start difference. First operand has 334 places, 389 transitions, 7917 flow. Second operand 19 states and 264 transitions. [2024-11-16 19:36:21,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 546 transitions, 11331 flow [2024-11-16 19:36:21,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 546 transitions, 11094 flow, removed 66 selfloop flow, removed 9 redundant places. [2024-11-16 19:36:21,955 INFO L231 Difference]: Finished difference. Result has 353 places, 453 transitions, 9757 flow [2024-11-16 19:36:21,956 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=7731, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=193, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=9757, PETRI_PLACES=353, PETRI_TRANSITIONS=453} [2024-11-16 19:36:21,956 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 326 predicate places. [2024-11-16 19:36:21,956 INFO L471 AbstractCegarLoop]: Abstraction has has 353 places, 453 transitions, 9757 flow [2024-11-16 19:36:21,957 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 9.0) internal successors, (126), 14 states have internal predecessors, (126), 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) [2024-11-16 19:36:21,957 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:36:21,957 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:36:21,971 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-11-16 19:36:22,157 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:36:22,158 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:36:22,159 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:36:22,159 INFO L85 PathProgramCache]: Analyzing trace with hash 1865998044, now seen corresponding path program 8 times [2024-11-16 19:36:22,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:36:22,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429024905] [2024-11-16 19:36:22,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:36:22,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:36:22,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:36:22,335 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-16 19:36:22,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:36:22,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429024905] [2024-11-16 19:36:22,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429024905] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:36:22,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484979533] [2024-11-16 19:36:22,337 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-16 19:36:22,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:36:22,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:36:22,338 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 19:36:22,340 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-16 19:36:22,454 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-16 19:36:22,454 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 19:36:22,457 INFO L255 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-16 19:36:22,458 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:36:22,531 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-16 19:36:22,531 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:36:22,615 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-16 19:36:22,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484979533] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 19:36:22,616 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 19:36:22,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-16 19:36:22,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797195100] [2024-11-16 19:36:22,616 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 19:36:22,616 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-16 19:36:22,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:36:22,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-16 19:36:22,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2024-11-16 19:36:22,621 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-11-16 19:36:22,621 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 453 transitions, 9757 flow. Second operand has 13 states, 13 states have (on average 9.0) internal successors, (117), 13 states have internal predecessors, (117), 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) [2024-11-16 19:36:22,621 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:36:22,621 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-11-16 19:36:22,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:36:24,308 INFO L124 PetriNetUnfolderBase]: 1682/3524 cut-off events. [2024-11-16 19:36:24,309 INFO L125 PetriNetUnfolderBase]: For 77712/77712 co-relation queries the response was YES. [2024-11-16 19:36:24,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25907 conditions, 3524 events. 1682/3524 cut-off events. For 77712/77712 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 26919 event pairs, 207 based on Foata normal form. 20/3534 useless extension candidates. Maximal degree in co-relation 25799. Up to 681 conditions per place. [2024-11-16 19:36:24,355 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 281 selfloop transitions, 299 changer transitions 0/586 dead transitions. [2024-11-16 19:36:24,356 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 586 transitions, 12669 flow [2024-11-16 19:36:24,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-16 19:36:24,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-11-16 19:36:24,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 322 transitions. [2024-11-16 19:36:24,357 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4827586206896552 [2024-11-16 19:36:24,357 INFO L175 Difference]: Start difference. First operand has 353 places, 453 transitions, 9757 flow. Second operand 23 states and 322 transitions. [2024-11-16 19:36:24,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 586 transitions, 12669 flow [2024-11-16 19:36:24,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 586 transitions, 12251 flow, removed 136 selfloop flow, removed 5 redundant places. [2024-11-16 19:36:24,719 INFO L231 Difference]: Finished difference. Result has 377 places, 489 transitions, 11057 flow [2024-11-16 19:36:24,721 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=9300, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=447, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=258, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=11057, PETRI_PLACES=377, PETRI_TRANSITIONS=489} [2024-11-16 19:36:24,721 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 350 predicate places. [2024-11-16 19:36:24,721 INFO L471 AbstractCegarLoop]: Abstraction has has 377 places, 489 transitions, 11057 flow [2024-11-16 19:36:24,721 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 9.0) internal successors, (117), 13 states have internal predecessors, (117), 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) [2024-11-16 19:36:24,721 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:36:24,722 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:36:24,735 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-11-16 19:36:24,925 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-11-16 19:36:24,926 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:36:24,928 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:36:24,928 INFO L85 PathProgramCache]: Analyzing trace with hash 1714594336, now seen corresponding path program 9 times [2024-11-16 19:36:24,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:36:24,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48906695] [2024-11-16 19:36:24,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:36:24,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:36:24,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:36:25,201 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-16 19:36:25,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:36:25,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48906695] [2024-11-16 19:36:25,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48906695] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:36:25,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969751817] [2024-11-16 19:36:25,202 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-16 19:36:25,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:36:25,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:36:25,203 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 19:36:25,204 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-16 19:36:25,357 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-16 19:36:25,357 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 19:36:25,360 INFO L255 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-16 19:36:25,361 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:36:25,424 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-16 19:36:25,425 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:36:25,511 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-16 19:36:25,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969751817] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 19:36:25,511 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 19:36:25,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-16 19:36:25,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990434988] [2024-11-16 19:36:25,512 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 19:36:25,512 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-16 19:36:25,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:36:25,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-16 19:36:25,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2024-11-16 19:36:25,524 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-11-16 19:36:25,524 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 489 transitions, 11057 flow. Second operand has 13 states, 13 states have (on average 9.307692307692308) internal successors, (121), 13 states have internal predecessors, (121), 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) [2024-11-16 19:36:25,524 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:36:25,524 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-11-16 19:36:25,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand