./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-more-max-array-hom.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/weaver/popl20-more-max-array-hom.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 25cf9c0a16564c460f6e824f90a2df4185d2e5d2c682a221258efaf06dec8ca4 --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 16:56:20,984 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 16:56:21,043 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 16:56:21,049 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 16:56:21,049 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 16:56:21,084 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 16:56:21,085 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 16:56:21,085 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 16:56:21,086 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 16:56:21,089 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 16:56:21,090 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 16:56:21,090 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 16:56:21,091 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 16:56:21,092 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 16:56:21,092 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 16:56:21,092 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 16:56:21,093 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 16:56:21,093 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 16:56:21,093 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 16:56:21,093 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 16:56:21,093 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 16:56:21,094 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 16:56:21,094 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 16:56:21,094 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 16:56:21,094 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 16:56:21,095 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 16:56:21,095 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 16:56:21,095 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 16:56:21,096 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 16:56:21,096 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 16:56:21,097 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 16:56:21,097 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 16:56:21,097 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 16:56:21,097 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 16:56:21,097 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 16:56:21,098 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 16:56:21,098 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 16:56:21,098 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 16:56:21,098 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 16:56:21,098 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 16:56:21,098 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 16:56:21,099 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 16:56:21,100 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 16:56:21,100 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 25cf9c0a16564c460f6e824f90a2df4185d2e5d2c682a221258efaf06dec8ca4 [2024-06-27 16:56:21,335 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 16:56:21,350 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 16:56:21,352 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 16:56:21,353 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 16:56:21,353 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 16:56:21,354 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-max-array-hom.wvr.c [2024-06-27 16:56:22,346 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 16:56:22,485 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 16:56:22,486 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-max-array-hom.wvr.c [2024-06-27 16:56:22,491 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7a1f53f0e/b2c938bc204b44e3ac488738ce11e9da/FLAG73fb01ed8 [2024-06-27 16:56:22,503 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7a1f53f0e/b2c938bc204b44e3ac488738ce11e9da [2024-06-27 16:56:22,505 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 16:56:22,506 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-06-27 16:56:22,508 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 16:56:22,508 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 16:56:22,512 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 16:56:22,513 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 04:56:22" (1/1) ... [2024-06-27 16:56:22,513 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36c69c02 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:56:22, skipping insertion in model container [2024-06-27 16:56:22,513 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 04:56:22" (1/1) ... [2024-06-27 16:56:22,533 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 16:56:22,712 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-max-array-hom.wvr.c[2625,2638] [2024-06-27 16:56:22,726 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 16:56:22,734 INFO L202 MainTranslator]: Completed pre-run [2024-06-27 16:56:22,770 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-max-array-hom.wvr.c[2625,2638] [2024-06-27 16:56:22,773 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 16:56:22,788 INFO L206 MainTranslator]: Completed translation [2024-06-27 16:56:22,789 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:56:22 WrapperNode [2024-06-27 16:56:22,789 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 16:56:22,791 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 16:56:22,791 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 16:56:22,792 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 16:56:22,797 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:56:22" (1/1) ... [2024-06-27 16:56:22,811 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:56:22" (1/1) ... [2024-06-27 16:56:22,835 INFO L138 Inliner]: procedures = 23, calls = 28, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 87 [2024-06-27 16:56:22,835 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 16:56:22,836 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 16:56:22,836 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 16:56:22,836 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 16:56:22,844 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:56:22" (1/1) ... [2024-06-27 16:56:22,845 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:56:22" (1/1) ... [2024-06-27 16:56:22,854 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:56:22" (1/1) ... [2024-06-27 16:56:22,875 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]. [2024-06-27 16:56:22,875 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:56:22" (1/1) ... [2024-06-27 16:56:22,875 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:56:22" (1/1) ... [2024-06-27 16:56:22,885 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:56:22" (1/1) ... [2024-06-27 16:56:22,889 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:56:22" (1/1) ... [2024-06-27 16:56:22,891 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:56:22" (1/1) ... [2024-06-27 16:56:22,894 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:56:22" (1/1) ... [2024-06-27 16:56:22,895 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 16:56:22,896 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 16:56:22,896 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 16:56:22,896 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 16:56:22,897 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:56:22" (1/1) ... [2024-06-27 16:56:22,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 16:56:22,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:56:22,937 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) [2024-06-27 16:56:22,942 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 [2024-06-27 16:56:22,979 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 16:56:22,980 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-06-27 16:56:22,980 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-06-27 16:56:22,980 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-06-27 16:56:22,980 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-06-27 16:56:22,980 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-06-27 16:56:22,981 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-06-27 16:56:22,981 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 16:56:22,981 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-27 16:56:22,981 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-27 16:56:22,981 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-27 16:56:22,981 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 16:56:22,981 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 16:56:22,982 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-06-27 16:56:22,982 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 16:56:22,982 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 16:56:22,982 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-27 16:56:22,982 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-27 16:56:22,990 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-27 16:56:23,063 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 16:56:23,065 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 16:56:23,291 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 16:56:23,291 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 16:56:23,446 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 16:56:23,447 INFO L320 CfgBuilder]: Removed 4 assume(true) statements. [2024-06-27 16:56:23,447 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 04:56:23 BoogieIcfgContainer [2024-06-27 16:56:23,447 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 16:56:23,449 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 16:56:23,449 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 16:56:23,451 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 16:56:23,451 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 04:56:22" (1/3) ... [2024-06-27 16:56:23,452 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38fee599 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 04:56:23, skipping insertion in model container [2024-06-27 16:56:23,452 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:56:22" (2/3) ... [2024-06-27 16:56:23,452 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38fee599 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 04:56:23, skipping insertion in model container [2024-06-27 16:56:23,452 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 04:56:23" (3/3) ... [2024-06-27 16:56:23,454 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-max-array-hom.wvr.c [2024-06-27 16:56:23,460 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2024-06-27 16:56:23,467 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 16:56:23,467 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-06-27 16:56:23,467 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 16:56:23,527 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-06-27 16:56:23,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 39 places, 33 transitions, 87 flow [2024-06-27 16:56:23,591 INFO L124 PetriNetUnfolderBase]: 4/30 cut-off events. [2024-06-27 16:56:23,592 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-06-27 16:56:23,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43 conditions, 30 events. 4/30 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 43 event pairs, 0 based on Foata normal form. 0/25 useless extension candidates. Maximal degree in co-relation 24. Up to 2 conditions per place. [2024-06-27 16:56:23,596 INFO L82 GeneralOperation]: Start removeDead. Operand has 39 places, 33 transitions, 87 flow [2024-06-27 16:56:23,599 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 35 places, 29 transitions, 76 flow [2024-06-27 16:56:23,613 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 16:56:23,622 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@36af783c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 16:56:23,622 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-06-27 16:56:23,634 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 16:56:23,634 INFO L124 PetriNetUnfolderBase]: 4/28 cut-off events. [2024-06-27 16:56:23,634 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-06-27 16:56:23,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:56:23,635 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:56:23,636 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:56:23,641 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:56:23,642 INFO L85 PathProgramCache]: Analyzing trace with hash -1958378008, now seen corresponding path program 1 times [2024-06-27 16:56:23,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:56:23,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857069552] [2024-06-27 16:56:23,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:56:23,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:56:23,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:56:24,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:56:24,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:56:24,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857069552] [2024-06-27 16:56:24,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857069552] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:56:24,267 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:56:24,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 16:56:24,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313816758] [2024-06-27 16:56:24,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:56:24,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 16:56:24,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:56:24,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 16:56:24,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 16:56:24,302 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-27 16:56:24,305 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 29 transitions, 76 flow. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:56:24,305 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:56:24,305 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-27 16:56:24,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:56:24,466 INFO L124 PetriNetUnfolderBase]: 617/956 cut-off events. [2024-06-27 16:56:24,467 INFO L125 PetriNetUnfolderBase]: For 87/87 co-relation queries the response was YES. [2024-06-27 16:56:24,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1951 conditions, 956 events. 617/956 cut-off events. For 87/87 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 3841 event pairs, 126 based on Foata normal form. 1/952 useless extension candidates. Maximal degree in co-relation 1717. Up to 677 conditions per place. [2024-06-27 16:56:24,477 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 37 selfloop transitions, 4 changer transitions 1/46 dead transitions. [2024-06-27 16:56:24,477 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 46 transitions, 209 flow [2024-06-27 16:56:24,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 16:56:24,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 16:56:24,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 64 transitions. [2024-06-27 16:56:24,487 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6464646464646465 [2024-06-27 16:56:24,489 INFO L175 Difference]: Start difference. First operand has 35 places, 29 transitions, 76 flow. Second operand 3 states and 64 transitions. [2024-06-27 16:56:24,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 46 transitions, 209 flow [2024-06-27 16:56:24,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 46 transitions, 187 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-27 16:56:24,497 INFO L231 Difference]: Finished difference. Result has 32 places, 32 transitions, 90 flow [2024-06-27 16:56:24,498 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=90, PETRI_PLACES=32, PETRI_TRANSITIONS=32} [2024-06-27 16:56:24,501 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, -3 predicate places. [2024-06-27 16:56:24,501 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 32 transitions, 90 flow [2024-06-27 16:56:24,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:56:24,502 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:56:24,502 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:56:24,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 16:56:24,504 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:56:24,505 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:56:24,505 INFO L85 PathProgramCache]: Analyzing trace with hash -2056652879, now seen corresponding path program 1 times [2024-06-27 16:56:24,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:56:24,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583750501] [2024-06-27 16:56:24,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:56:24,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:56:24,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:56:24,588 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:56:24,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:56:24,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583750501] [2024-06-27 16:56:24,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583750501] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:56:24,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:56:24,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 16:56:24,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099743389] [2024-06-27 16:56:24,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:56:24,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 16:56:24,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:56:24,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 16:56:24,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 16:56:24,598 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-27 16:56:24,599 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 32 transitions, 90 flow. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:56:24,599 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:56:24,599 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-27 16:56:24,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:56:24,695 INFO L124 PetriNetUnfolderBase]: 617/965 cut-off events. [2024-06-27 16:56:24,695 INFO L125 PetriNetUnfolderBase]: For 198/198 co-relation queries the response was YES. [2024-06-27 16:56:24,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2170 conditions, 965 events. 617/965 cut-off events. For 198/198 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 4063 event pairs, 407 based on Foata normal form. 0/957 useless extension candidates. Maximal degree in co-relation 812. Up to 895 conditions per place. [2024-06-27 16:56:24,700 INFO L140 encePairwiseOnDemand]: 30/33 looper letters, 27 selfloop transitions, 2 changer transitions 0/33 dead transitions. [2024-06-27 16:56:24,700 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 33 transitions, 150 flow [2024-06-27 16:56:24,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 16:56:24,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 16:56:24,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 48 transitions. [2024-06-27 16:56:24,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48484848484848486 [2024-06-27 16:56:24,703 INFO L175 Difference]: Start difference. First operand has 32 places, 32 transitions, 90 flow. Second operand 3 states and 48 transitions. [2024-06-27 16:56:24,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 33 transitions, 150 flow [2024-06-27 16:56:24,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 33 transitions, 146 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 16:56:24,707 INFO L231 Difference]: Finished difference. Result has 34 places, 33 transitions, 98 flow [2024-06-27 16:56:24,708 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=98, PETRI_PLACES=34, PETRI_TRANSITIONS=33} [2024-06-27 16:56:24,708 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, -1 predicate places. [2024-06-27 16:56:24,708 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 33 transitions, 98 flow [2024-06-27 16:56:24,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:56:24,709 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:56:24,709 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:56:24,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 16:56:24,710 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:56:24,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:56:24,712 INFO L85 PathProgramCache]: Analyzing trace with hash -448016717, now seen corresponding path program 1 times [2024-06-27 16:56:24,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:56:24,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336685896] [2024-06-27 16:56:24,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:56:24,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:56:24,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:56:24,800 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:56:24,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:56:24,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336685896] [2024-06-27 16:56:24,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336685896] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:56:24,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:56:24,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 16:56:24,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948129220] [2024-06-27 16:56:24,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:56:24,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 16:56:24,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:56:24,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 16:56:24,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 16:56:24,815 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 33 [2024-06-27 16:56:24,815 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 33 transitions, 98 flow. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 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) [2024-06-27 16:56:24,816 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:56:24,816 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 33 [2024-06-27 16:56:24,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:56:24,941 INFO L124 PetriNetUnfolderBase]: 790/1159 cut-off events. [2024-06-27 16:56:24,942 INFO L125 PetriNetUnfolderBase]: For 186/186 co-relation queries the response was YES. [2024-06-27 16:56:24,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2573 conditions, 1159 events. 790/1159 cut-off events. For 186/186 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 4529 event pairs, 246 based on Foata normal form. 0/1114 useless extension candidates. Maximal degree in co-relation 2560. Up to 576 conditions per place. [2024-06-27 16:56:24,947 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 40 selfloop transitions, 4 changer transitions 0/47 dead transitions. [2024-06-27 16:56:24,947 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 47 transitions, 224 flow [2024-06-27 16:56:24,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 16:56:24,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 16:56:24,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 63 transitions. [2024-06-27 16:56:24,951 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4772727272727273 [2024-06-27 16:56:24,951 INFO L175 Difference]: Start difference. First operand has 34 places, 33 transitions, 98 flow. Second operand 4 states and 63 transitions. [2024-06-27 16:56:24,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 47 transitions, 224 flow [2024-06-27 16:56:24,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 47 transitions, 218 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-06-27 16:56:24,954 INFO L231 Difference]: Finished difference. Result has 38 places, 34 transitions, 113 flow [2024-06-27 16:56:24,954 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=113, PETRI_PLACES=38, PETRI_TRANSITIONS=34} [2024-06-27 16:56:24,955 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 3 predicate places. [2024-06-27 16:56:24,956 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 34 transitions, 113 flow [2024-06-27 16:56:24,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 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) [2024-06-27 16:56:24,956 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:56:24,956 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:56:24,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 16:56:24,956 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:56:24,957 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:56:24,957 INFO L85 PathProgramCache]: Analyzing trace with hash -164649811, now seen corresponding path program 1 times [2024-06-27 16:56:24,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:56:24,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638942624] [2024-06-27 16:56:24,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:56:24,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:56:24,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:56:25,037 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:56:25,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:56:25,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638942624] [2024-06-27 16:56:25,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638942624] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:56:25,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960205085] [2024-06-27 16:56:25,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:56:25,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:56:25,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:56:25,039 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) [2024-06-27 16:56:25,068 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-06-27 16:56:25,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:56:25,117 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 6 conjunts are in the unsatisfiable core [2024-06-27 16:56:25,121 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:56:25,182 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:56:25,182 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:56:25,209 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:56:25,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960205085] provided 1 perfect and 1 imperfect interpolant sequences [2024-06-27 16:56:25,209 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-06-27 16:56:25,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2024-06-27 16:56:25,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846183901] [2024-06-27 16:56:25,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:56:25,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 16:56:25,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:56:25,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 16:56:25,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 16:56:25,215 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 33 [2024-06-27 16:56:25,215 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 34 transitions, 113 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) [2024-06-27 16:56:25,215 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:56:25,215 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 33 [2024-06-27 16:56:25,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:56:25,338 INFO L124 PetriNetUnfolderBase]: 850/1295 cut-off events. [2024-06-27 16:56:25,338 INFO L125 PetriNetUnfolderBase]: For 486/486 co-relation queries the response was YES. [2024-06-27 16:56:25,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3227 conditions, 1295 events. 850/1295 cut-off events. For 486/486 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 5466 event pairs, 256 based on Foata normal form. 0/1243 useless extension candidates. Maximal degree in co-relation 3207. Up to 670 conditions per place. [2024-06-27 16:56:25,345 INFO L140 encePairwiseOnDemand]: 27/33 looper letters, 41 selfloop transitions, 5 changer transitions 0/50 dead transitions. [2024-06-27 16:56:25,345 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 50 transitions, 257 flow [2024-06-27 16:56:25,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 16:56:25,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 16:56:25,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 72 transitions. [2024-06-27 16:56:25,346 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43636363636363634 [2024-06-27 16:56:25,346 INFO L175 Difference]: Start difference. First operand has 38 places, 34 transitions, 113 flow. Second operand 5 states and 72 transitions. [2024-06-27 16:56:25,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 50 transitions, 257 flow [2024-06-27 16:56:25,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 50 transitions, 251 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-27 16:56:25,349 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 132 flow [2024-06-27 16:56:25,349 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=109, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=132, PETRI_PLACES=42, PETRI_TRANSITIONS=35} [2024-06-27 16:56:25,350 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 7 predicate places. [2024-06-27 16:56:25,350 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 132 flow [2024-06-27 16:56:25,350 INFO L496 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) [2024-06-27 16:56:25,350 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:56:25,350 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:56:25,362 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-06-27 16:56:25,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:56:25,564 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:56:25,564 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:56:25,564 INFO L85 PathProgramCache]: Analyzing trace with hash -1682656032, now seen corresponding path program 1 times [2024-06-27 16:56:25,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:56:25,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533726729] [2024-06-27 16:56:25,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:56:25,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:56:25,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:56:26,160 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:56:26,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:56:26,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533726729] [2024-06-27 16:56:26,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533726729] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:56:26,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863794389] [2024-06-27 16:56:26,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:56:26,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:56:26,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:56:26,173 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) [2024-06-27 16:56:26,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-06-27 16:56:26,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:56:26,254 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 32 conjunts are in the unsatisfiable core [2024-06-27 16:56:26,257 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:56:26,305 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 [2024-06-27 16:56:26,505 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 55 treesize of output 31 [2024-06-27 16:56:26,567 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:56:26,568 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:56:28,104 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 225 treesize of output 207 [2024-06-27 16:56:28,160 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:56:28,160 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 260 treesize of output 290 [2024-06-27 16:56:54,297 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 294 treesize of output 264 [2024-06-27 16:56:54,309 INFO L349 Elim1Store]: treesize reduction 80, result has 1.2 percent of original size [2024-06-27 16:56:54,310 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 387 treesize of output 1 [2024-06-27 16:56:54,370 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:56:54,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1863794389] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:56:54,371 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:56:54,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2024-06-27 16:56:54,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126531424] [2024-06-27 16:56:54,371 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:56:54,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-06-27 16:56:54,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:56:54,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-06-27 16:56:54,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2024-06-27 16:56:54,514 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 33 [2024-06-27 16:56:54,514 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 132 flow. Second operand has 21 states, 21 states have (on average 9.0) internal successors, (189), 21 states have internal predecessors, (189), 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) [2024-06-27 16:56:54,515 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:56:54,515 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 33 [2024-06-27 16:56:54,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:56:56,163 INFO L124 PetriNetUnfolderBase]: 1841/2767 cut-off events. [2024-06-27 16:56:56,163 INFO L125 PetriNetUnfolderBase]: For 1740/1740 co-relation queries the response was YES. [2024-06-27 16:56:56,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7675 conditions, 2767 events. 1841/2767 cut-off events. For 1740/1740 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 12710 event pairs, 98 based on Foata normal form. 1/2767 useless extension candidates. Maximal degree in co-relation 5619. Up to 1375 conditions per place. [2024-06-27 16:56:56,180 INFO L140 encePairwiseOnDemand]: 22/33 looper letters, 137 selfloop transitions, 57 changer transitions 1/199 dead transitions. [2024-06-27 16:56:56,180 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 199 transitions, 1067 flow [2024-06-27 16:56:56,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-06-27 16:56:56,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-06-27 16:56:56,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 321 transitions. [2024-06-27 16:56:56,184 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46320346320346323 [2024-06-27 16:56:56,185 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 132 flow. Second operand 21 states and 321 transitions. [2024-06-27 16:56:56,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 199 transitions, 1067 flow [2024-06-27 16:56:56,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 199 transitions, 1050 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 16:56:56,192 INFO L231 Difference]: Finished difference. Result has 64 places, 91 transitions, 543 flow [2024-06-27 16:56:56,192 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=543, PETRI_PLACES=64, PETRI_TRANSITIONS=91} [2024-06-27 16:56:56,194 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 29 predicate places. [2024-06-27 16:56:56,194 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 91 transitions, 543 flow [2024-06-27 16:56:56,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 9.0) internal successors, (189), 21 states have internal predecessors, (189), 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) [2024-06-27 16:56:56,195 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:56:56,195 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:56:56,208 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-06-27 16:56:56,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:56:56,408 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:56:56,409 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:56:56,409 INFO L85 PathProgramCache]: Analyzing trace with hash 1004642878, now seen corresponding path program 2 times [2024-06-27 16:56:56,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:56:56,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777258954] [2024-06-27 16:56:56,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:56:56,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:56:56,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:56:56,823 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:56:56,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:56:56,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777258954] [2024-06-27 16:56:56,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777258954] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:56:56,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971663685] [2024-06-27 16:56:56,825 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 16:56:56,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:56:56,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:56:56,827 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) [2024-06-27 16:56:56,827 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-06-27 16:56:56,909 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 16:56:56,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:56:56,911 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 32 conjunts are in the unsatisfiable core [2024-06-27 16:56:56,914 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:56:56,930 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 [2024-06-27 16:56:57,102 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 54 treesize of output 30 [2024-06-27 16:56:57,161 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:56:57,162 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:56:58,446 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 225 treesize of output 207 [2024-06-27 16:56:58,488 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:56:58,488 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 260 treesize of output 290 [2024-06-27 16:57:19,036 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 294 treesize of output 264 [2024-06-27 16:57:19,052 INFO L349 Elim1Store]: treesize reduction 80, result has 1.2 percent of original size [2024-06-27 16:57:19,053 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 387 treesize of output 1 [2024-06-27 16:57:19,081 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:57:19,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971663685] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:57:19,081 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:57:19,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2024-06-27 16:57:19,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67119071] [2024-06-27 16:57:19,082 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:57:19,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-06-27 16:57:19,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:57:19,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-06-27 16:57:19,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2024-06-27 16:57:19,251 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-27 16:57:19,252 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 91 transitions, 543 flow. Second operand has 19 states, 19 states have (on average 9.736842105263158) internal successors, (185), 19 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:57:19,252 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:57:19,252 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-27 16:57:19,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:57:20,102 INFO L124 PetriNetUnfolderBase]: 1538/2444 cut-off events. [2024-06-27 16:57:20,103 INFO L125 PetriNetUnfolderBase]: For 3230/3235 co-relation queries the response was YES. [2024-06-27 16:57:20,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7989 conditions, 2444 events. 1538/2444 cut-off events. For 3230/3235 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 12016 event pairs, 120 based on Foata normal form. 5/2442 useless extension candidates. Maximal degree in co-relation 7439. Up to 1629 conditions per place. [2024-06-27 16:57:20,121 INFO L140 encePairwiseOnDemand]: 22/33 looper letters, 125 selfloop transitions, 49 changer transitions 1/181 dead transitions. [2024-06-27 16:57:20,121 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 181 transitions, 1211 flow [2024-06-27 16:57:20,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-27 16:57:20,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-27 16:57:20,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 242 transitions. [2024-06-27 16:57:20,123 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4888888888888889 [2024-06-27 16:57:20,123 INFO L175 Difference]: Start difference. First operand has 64 places, 91 transitions, 543 flow. Second operand 15 states and 242 transitions. [2024-06-27 16:57:20,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 181 transitions, 1211 flow [2024-06-27 16:57:20,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 181 transitions, 1093 flow, removed 44 selfloop flow, removed 3 redundant places. [2024-06-27 16:57:20,134 INFO L231 Difference]: Finished difference. Result has 76 places, 111 transitions, 679 flow [2024-06-27 16:57:20,134 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=453, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=679, PETRI_PLACES=76, PETRI_TRANSITIONS=111} [2024-06-27 16:57:20,136 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 41 predicate places. [2024-06-27 16:57:20,136 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 111 transitions, 679 flow [2024-06-27 16:57:20,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 9.736842105263158) internal successors, (185), 19 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:57:20,136 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:57:20,137 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:57:20,163 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-06-27 16:57:20,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:57:20,350 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:57:20,351 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:57:20,351 INFO L85 PathProgramCache]: Analyzing trace with hash -1382937676, now seen corresponding path program 3 times [2024-06-27 16:57:20,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:57:20,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123581491] [2024-06-27 16:57:20,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:57:20,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:57:20,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:57:20,919 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:57:20,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:57:20,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123581491] [2024-06-27 16:57:20,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123581491] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:57:20,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702625521] [2024-06-27 16:57:20,920 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 16:57:20,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:57:20,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:57:20,921 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) [2024-06-27 16:57:20,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-06-27 16:57:21,010 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-06-27 16:57:21,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:57:21,011 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 26 conjunts are in the unsatisfiable core [2024-06-27 16:57:21,013 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:57:21,233 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 55 treesize of output 31 [2024-06-27 16:57:21,280 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:57:21,280 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:57:21,453 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:57:21,453 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 123 treesize of output 75 [2024-06-27 16:57:21,780 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:57:21,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702625521] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:57:21,780 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:57:21,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 22 [2024-06-27 16:57:21,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885415240] [2024-06-27 16:57:21,780 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:57:21,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-06-27 16:57:21,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:57:21,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-06-27 16:57:21,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2024-06-27 16:57:21,877 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 33 [2024-06-27 16:57:21,878 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 111 transitions, 679 flow. Second operand has 23 states, 23 states have (on average 8.869565217391305) internal successors, (204), 23 states have internal predecessors, (204), 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) [2024-06-27 16:57:21,878 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:57:21,878 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 33 [2024-06-27 16:57:21,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:57:22,453 INFO L124 PetriNetUnfolderBase]: 2451/3672 cut-off events. [2024-06-27 16:57:22,453 INFO L125 PetriNetUnfolderBase]: For 4236/4245 co-relation queries the response was YES. [2024-06-27 16:57:22,461 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11774 conditions, 3672 events. 2451/3672 cut-off events. For 4236/4245 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 17843 event pairs, 266 based on Foata normal form. 10/3681 useless extension candidates. Maximal degree in co-relation 11111. Up to 2788 conditions per place. [2024-06-27 16:57:22,480 INFO L140 encePairwiseOnDemand]: 22/33 looper letters, 147 selfloop transitions, 47 changer transitions 1/199 dead transitions. [2024-06-27 16:57:22,481 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 199 transitions, 1409 flow [2024-06-27 16:57:22,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 16:57:22,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 16:57:22,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 199 transitions. [2024-06-27 16:57:22,483 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46386946386946387 [2024-06-27 16:57:22,483 INFO L175 Difference]: Start difference. First operand has 76 places, 111 transitions, 679 flow. Second operand 13 states and 199 transitions. [2024-06-27 16:57:22,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 199 transitions, 1409 flow [2024-06-27 16:57:22,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 199 transitions, 1372 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-27 16:57:22,495 INFO L231 Difference]: Finished difference. Result has 87 places, 137 transitions, 954 flow [2024-06-27 16:57:22,496 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=645, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=954, PETRI_PLACES=87, PETRI_TRANSITIONS=137} [2024-06-27 16:57:22,496 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 52 predicate places. [2024-06-27 16:57:22,497 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 137 transitions, 954 flow [2024-06-27 16:57:22,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 8.869565217391305) internal successors, (204), 23 states have internal predecessors, (204), 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) [2024-06-27 16:57:22,497 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:57:22,497 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:57:22,518 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-06-27 16:57:22,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:57:22,712 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:57:22,712 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:57:22,713 INFO L85 PathProgramCache]: Analyzing trace with hash -765414318, now seen corresponding path program 4 times [2024-06-27 16:57:22,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:57:22,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778354675] [2024-06-27 16:57:22,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:57:22,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:57:22,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:57:23,252 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:57:23,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:57:23,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778354675] [2024-06-27 16:57:23,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778354675] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:57:23,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175344235] [2024-06-27 16:57:23,252 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 16:57:23,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:57:23,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:57:23,253 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) [2024-06-27 16:57:23,254 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-06-27 16:57:23,309 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 16:57:23,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:57:23,310 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 32 conjunts are in the unsatisfiable core [2024-06-27 16:57:23,312 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:57:23,325 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 [2024-06-27 16:57:23,502 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 55 treesize of output 31 [2024-06-27 16:57:23,541 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:57:23,541 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:57:24,859 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 229 treesize of output 205 [2024-06-27 16:57:24,888 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:57:24,888 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 311 treesize of output 291 [2024-06-27 16:57:28,359 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 106 treesize of output 96 [2024-06-27 16:57:28,367 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-06-27 16:57:28,368 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 125 treesize of output 115 [2024-06-27 16:57:28,538 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 182 treesize of output 166 [2024-06-27 16:57:28,547 INFO L349 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2024-06-27 16:57:28,548 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 214 treesize of output 1 [2024-06-27 16:57:28,592 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:57:28,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175344235] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:57:28,592 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:57:28,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 21 [2024-06-27 16:57:28,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992502544] [2024-06-27 16:57:28,593 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:57:28,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-06-27 16:57:28,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:57:28,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-06-27 16:57:28,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2024-06-27 16:57:28,731 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 33 [2024-06-27 16:57:28,732 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 137 transitions, 954 flow. Second operand has 22 states, 22 states have (on average 8.954545454545455) internal successors, (197), 22 states have internal predecessors, (197), 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) [2024-06-27 16:57:28,732 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:57:28,732 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 33 [2024-06-27 16:57:28,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:57:30,630 INFO L124 PetriNetUnfolderBase]: 2875/4342 cut-off events. [2024-06-27 16:57:30,631 INFO L125 PetriNetUnfolderBase]: For 6750/6759 co-relation queries the response was YES. [2024-06-27 16:57:30,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15088 conditions, 4342 events. 2875/4342 cut-off events. For 6750/6759 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 22053 event pairs, 142 based on Foata normal form. 10/4351 useless extension candidates. Maximal degree in co-relation 14418. Up to 1738 conditions per place. [2024-06-27 16:57:30,658 INFO L140 encePairwiseOnDemand]: 22/33 looper letters, 140 selfloop transitions, 121 changer transitions 1/266 dead transitions. [2024-06-27 16:57:30,658 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 266 transitions, 1967 flow [2024-06-27 16:57:30,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-06-27 16:57:30,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-06-27 16:57:30,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 320 transitions. [2024-06-27 16:57:30,660 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46176046176046176 [2024-06-27 16:57:30,660 INFO L175 Difference]: Start difference. First operand has 87 places, 137 transitions, 954 flow. Second operand 21 states and 320 transitions. [2024-06-27 16:57:30,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 266 transitions, 1967 flow [2024-06-27 16:57:30,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 266 transitions, 1940 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-27 16:57:30,683 INFO L231 Difference]: Finished difference. Result has 106 places, 161 transitions, 1413 flow [2024-06-27 16:57:30,683 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=927, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1413, PETRI_PLACES=106, PETRI_TRANSITIONS=161} [2024-06-27 16:57:30,684 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 71 predicate places. [2024-06-27 16:57:30,684 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 161 transitions, 1413 flow [2024-06-27 16:57:30,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 8.954545454545455) internal successors, (197), 22 states have internal predecessors, (197), 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) [2024-06-27 16:57:30,686 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:57:30,686 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:57:30,697 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-06-27 16:57:30,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:57:30,897 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:57:30,898 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:57:30,898 INFO L85 PathProgramCache]: Analyzing trace with hash -1422280106, now seen corresponding path program 5 times [2024-06-27 16:57:30,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:57:30,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759339878] [2024-06-27 16:57:30,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:57:30,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:57:30,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:57:31,335 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:57:31,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:57:31,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759339878] [2024-06-27 16:57:31,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759339878] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:57:31,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413871676] [2024-06-27 16:57:31,336 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-27 16:57:31,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:57:31,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:57:31,337 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) [2024-06-27 16:57:31,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-06-27 16:57:31,398 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 16:57:31,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:57:31,399 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 32 conjunts are in the unsatisfiable core [2024-06-27 16:57:31,403 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:57:31,418 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 [2024-06-27 16:57:31,662 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 55 treesize of output 31 [2024-06-27 16:57:31,713 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:57:31,713 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:57:33,790 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 182 treesize of output 166 [2024-06-27 16:57:33,818 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:57:33,819 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 214 treesize of output 218 [2024-06-27 16:57:38,557 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 106 treesize of output 96 [2024-06-27 16:57:38,567 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-06-27 16:57:38,567 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 125 treesize of output 115 [2024-06-27 16:57:38,822 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 229 treesize of output 205 [2024-06-27 16:57:38,833 INFO L349 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2024-06-27 16:57:38,833 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 311 treesize of output 1 [2024-06-27 16:57:38,902 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:57:38,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413871676] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:57:38,903 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:57:38,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 25 [2024-06-27 16:57:38,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299706046] [2024-06-27 16:57:38,903 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:57:38,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-06-27 16:57:38,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:57:38,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-06-27 16:57:38,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=535, Unknown=0, NotChecked=0, Total=650 [2024-06-27 16:57:39,062 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 33 [2024-06-27 16:57:39,062 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 161 transitions, 1413 flow. Second operand has 26 states, 26 states have (on average 8.73076923076923) internal successors, (227), 26 states have internal predecessors, (227), 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) [2024-06-27 16:57:39,062 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:57:39,062 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 33 [2024-06-27 16:57:39,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:57:41,966 INFO L124 PetriNetUnfolderBase]: 3031/4533 cut-off events. [2024-06-27 16:57:41,967 INFO L125 PetriNetUnfolderBase]: For 10444/10453 co-relation queries the response was YES. [2024-06-27 16:57:41,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17559 conditions, 4533 events. 3031/4533 cut-off events. For 10444/10453 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 22783 event pairs, 82 based on Foata normal form. 10/4542 useless extension candidates. Maximal degree in co-relation 16807. Up to 1781 conditions per place. [2024-06-27 16:57:42,002 INFO L140 encePairwiseOnDemand]: 21/33 looper letters, 150 selfloop transitions, 141 changer transitions 2/297 dead transitions. [2024-06-27 16:57:42,002 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 297 transitions, 2492 flow [2024-06-27 16:57:42,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-06-27 16:57:42,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-06-27 16:57:42,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 348 transitions. [2024-06-27 16:57:42,004 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45849802371541504 [2024-06-27 16:57:42,004 INFO L175 Difference]: Start difference. First operand has 106 places, 161 transitions, 1413 flow. Second operand 23 states and 348 transitions. [2024-06-27 16:57:42,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 297 transitions, 2492 flow [2024-06-27 16:57:42,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 297 transitions, 2379 flow, removed 36 selfloop flow, removed 10 redundant places. [2024-06-27 16:57:42,045 INFO L231 Difference]: Finished difference. Result has 121 places, 178 transitions, 1806 flow [2024-06-27 16:57:42,045 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=1324, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=1806, PETRI_PLACES=121, PETRI_TRANSITIONS=178} [2024-06-27 16:57:42,045 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 86 predicate places. [2024-06-27 16:57:42,046 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 178 transitions, 1806 flow [2024-06-27 16:57:42,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 8.73076923076923) internal successors, (227), 26 states have internal predecessors, (227), 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) [2024-06-27 16:57:42,046 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:57:42,046 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:57:42,067 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-06-27 16:57:42,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:57:42,262 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:57:42,263 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:57:42,263 INFO L85 PathProgramCache]: Analyzing trace with hash 1927002258, now seen corresponding path program 6 times [2024-06-27 16:57:42,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:57:42,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442004162] [2024-06-27 16:57:42,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:57:42,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:57:42,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:57:42,336 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:57:42,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:57:42,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442004162] [2024-06-27 16:57:42,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442004162] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:57:42,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941296923] [2024-06-27 16:57:42,337 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-27 16:57:42,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:57:42,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:57:42,338 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) [2024-06-27 16:57:42,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-06-27 16:57:42,402 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-06-27 16:57:42,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:57:42,403 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 8 conjunts are in the unsatisfiable core [2024-06-27 16:57:42,404 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:57:42,459 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:57:42,459 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:57:42,511 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:57:42,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941296923] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:57:42,512 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:57:42,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-06-27 16:57:42,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331322359] [2024-06-27 16:57:42,514 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:57:42,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-27 16:57:42,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:57:42,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-27 16:57:42,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2024-06-27 16:57:42,532 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 33 [2024-06-27 16:57:42,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 178 transitions, 1806 flow. Second operand has 14 states, 14 states have (on average 8.857142857142858) internal successors, (124), 14 states have internal predecessors, (124), 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) [2024-06-27 16:57:42,533 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:57:42,533 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 33 [2024-06-27 16:57:42,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:57:43,274 INFO L124 PetriNetUnfolderBase]: 4313/6455 cut-off events. [2024-06-27 16:57:43,275 INFO L125 PetriNetUnfolderBase]: For 19932/19964 co-relation queries the response was YES. [2024-06-27 16:57:43,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26025 conditions, 6455 events. 4313/6455 cut-off events. For 19932/19964 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 35752 event pairs, 1213 based on Foata normal form. 66/6515 useless extension candidates. Maximal degree in co-relation 25189. Up to 2295 conditions per place. [2024-06-27 16:57:43,310 INFO L140 encePairwiseOnDemand]: 26/33 looper letters, 274 selfloop transitions, 30 changer transitions 0/309 dead transitions. [2024-06-27 16:57:43,311 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 309 transitions, 3376 flow [2024-06-27 16:57:43,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 16:57:43,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 16:57:43,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 171 transitions. [2024-06-27 16:57:43,312 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5181818181818182 [2024-06-27 16:57:43,312 INFO L175 Difference]: Start difference. First operand has 121 places, 178 transitions, 1806 flow. Second operand 10 states and 171 transitions. [2024-06-27 16:57:43,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 309 transitions, 3376 flow [2024-06-27 16:57:43,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 309 transitions, 3095 flow, removed 41 selfloop flow, removed 15 redundant places. [2024-06-27 16:57:43,366 INFO L231 Difference]: Finished difference. Result has 118 places, 185 transitions, 1762 flow [2024-06-27 16:57:43,367 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=1617, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1762, PETRI_PLACES=118, PETRI_TRANSITIONS=185} [2024-06-27 16:57:43,367 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 83 predicate places. [2024-06-27 16:57:43,367 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 185 transitions, 1762 flow [2024-06-27 16:57:43,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 8.857142857142858) internal successors, (124), 14 states have internal predecessors, (124), 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) [2024-06-27 16:57:43,368 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:57:43,368 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:57:43,381 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-06-27 16:57:43,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:57:43,576 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:57:43,576 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:57:43,576 INFO L85 PathProgramCache]: Analyzing trace with hash -1336404964, now seen corresponding path program 1 times [2024-06-27 16:57:43,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:57:43,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375908521] [2024-06-27 16:57:43,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:57:43,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:57:43,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:57:43,651 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:57:43,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:57:43,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375908521] [2024-06-27 16:57:43,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375908521] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:57:43,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303834513] [2024-06-27 16:57:43,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:57:43,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:57:43,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:57:43,653 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) [2024-06-27 16:57:43,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-06-27 16:57:43,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:57:43,712 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 8 conjunts are in the unsatisfiable core [2024-06-27 16:57:43,713 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:57:43,751 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:57:43,751 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:57:43,792 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:57:43,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303834513] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:57:43,792 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:57:43,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2024-06-27 16:57:43,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180029355] [2024-06-27 16:57:43,792 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:57:43,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 16:57:43,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:57:43,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 16:57:43,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2024-06-27 16:57:43,818 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 33 [2024-06-27 16:57:43,818 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 185 transitions, 1762 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) [2024-06-27 16:57:43,818 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:57:43,818 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 33 [2024-06-27 16:57:43,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:57:44,244 INFO L124 PetriNetUnfolderBase]: 3033/4831 cut-off events. [2024-06-27 16:57:44,244 INFO L125 PetriNetUnfolderBase]: For 16120/16154 co-relation queries the response was YES. [2024-06-27 16:57:44,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19326 conditions, 4831 events. 3033/4831 cut-off events. For 16120/16154 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 28047 event pairs, 1505 based on Foata normal form. 2/4702 useless extension candidates. Maximal degree in co-relation 18736. Up to 1872 conditions per place. [2024-06-27 16:57:44,274 INFO L140 encePairwiseOnDemand]: 27/33 looper letters, 243 selfloop transitions, 6 changer transitions 0/258 dead transitions. [2024-06-27 16:57:44,274 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 258 transitions, 2972 flow [2024-06-27 16:57:44,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 16:57:44,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 16:57:44,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 98 transitions. [2024-06-27 16:57:44,275 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.494949494949495 [2024-06-27 16:57:44,276 INFO L175 Difference]: Start difference. First operand has 118 places, 185 transitions, 1762 flow. Second operand 6 states and 98 transitions. [2024-06-27 16:57:44,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 258 transitions, 2972 flow [2024-06-27 16:57:44,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 258 transitions, 2961 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-27 16:57:44,315 INFO L231 Difference]: Finished difference. Result has 123 places, 140 transitions, 1335 flow [2024-06-27 16:57:44,315 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=1308, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1335, PETRI_PLACES=123, PETRI_TRANSITIONS=140} [2024-06-27 16:57:44,316 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 88 predicate places. [2024-06-27 16:57:44,316 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 140 transitions, 1335 flow [2024-06-27 16:57:44,316 INFO L496 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) [2024-06-27 16:57:44,316 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:57:44,316 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:57:44,330 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-06-27 16:57:44,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-06-27 16:57:44,527 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:57:44,528 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:57:44,528 INFO L85 PathProgramCache]: Analyzing trace with hash 691244385, now seen corresponding path program 7 times [2024-06-27 16:57:44,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:57:44,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061330863] [2024-06-27 16:57:44,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:57:44,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:57:44,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:57:44,596 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:57:44,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:57:44,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061330863] [2024-06-27 16:57:44,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061330863] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:57:44,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091764045] [2024-06-27 16:57:44,597 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-06-27 16:57:44,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:57:44,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:57:44,598 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) [2024-06-27 16:57:44,616 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-06-27 16:57:44,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:57:44,659 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 8 conjunts are in the unsatisfiable core [2024-06-27 16:57:44,663 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:57:44,714 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:57:44,714 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:57:44,757 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:57:44,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091764045] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:57:44,758 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:57:44,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-06-27 16:57:44,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002795231] [2024-06-27 16:57:44,759 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:57:44,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-27 16:57:44,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:57:44,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-27 16:57:44,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2024-06-27 16:57:44,777 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 33 [2024-06-27 16:57:44,777 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 140 transitions, 1335 flow. Second operand has 14 states, 14 states have (on average 9.428571428571429) internal successors, (132), 14 states have internal predecessors, (132), 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) [2024-06-27 16:57:44,777 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:57:44,777 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 33 [2024-06-27 16:57:44,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:57:45,230 INFO L124 PetriNetUnfolderBase]: 3041/4816 cut-off events. [2024-06-27 16:57:45,230 INFO L125 PetriNetUnfolderBase]: For 15028/15183 co-relation queries the response was YES. [2024-06-27 16:57:45,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19821 conditions, 4816 events. 3041/4816 cut-off events. For 15028/15183 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 27073 event pairs, 1474 based on Foata normal form. 194/5005 useless extension candidates. Maximal degree in co-relation 19268. Up to 2030 conditions per place. [2024-06-27 16:57:45,261 INFO L140 encePairwiseOnDemand]: 26/33 looper letters, 140 selfloop transitions, 27 changer transitions 0/172 dead transitions. [2024-06-27 16:57:45,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 172 transitions, 1802 flow [2024-06-27 16:57:45,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 16:57:45,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 16:57:45,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2024-06-27 16:57:45,262 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49783549783549785 [2024-06-27 16:57:45,262 INFO L175 Difference]: Start difference. First operand has 123 places, 140 transitions, 1335 flow. Second operand 7 states and 115 transitions. [2024-06-27 16:57:45,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 172 transitions, 1802 flow [2024-06-27 16:57:45,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 172 transitions, 1773 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-27 16:57:45,303 INFO L231 Difference]: Finished difference. Result has 126 places, 123 transitions, 1220 flow [2024-06-27 16:57:45,303 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=1140, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1220, PETRI_PLACES=126, PETRI_TRANSITIONS=123} [2024-06-27 16:57:45,303 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 91 predicate places. [2024-06-27 16:57:45,303 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 123 transitions, 1220 flow [2024-06-27 16:57:45,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 9.428571428571429) internal successors, (132), 14 states have internal predecessors, (132), 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) [2024-06-27 16:57:45,304 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:57:45,304 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:57:45,317 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-06-27 16:57:45,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:57:45,515 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:57:45,516 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:57:45,516 INFO L85 PathProgramCache]: Analyzing trace with hash -1984884963, now seen corresponding path program 8 times [2024-06-27 16:57:45,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:57:45,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994729765] [2024-06-27 16:57:45,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:57:45,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:57:45,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:57:45,594 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:57:45,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:57:45,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994729765] [2024-06-27 16:57:45,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994729765] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:57:45,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860545584] [2024-06-27 16:57:45,595 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 16:57:45,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:57:45,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:57:45,596 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) [2024-06-27 16:57:45,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-06-27 16:57:45,659 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 16:57:45,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:57:45,660 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 9 conjunts are in the unsatisfiable core [2024-06-27 16:57:45,665 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:57:45,766 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:57:45,766 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:57:45,817 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:57:45,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1860545584] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:57:45,817 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:57:45,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-06-27 16:57:45,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734840495] [2024-06-27 16:57:45,818 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:57:45,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-27 16:57:45,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:57:45,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-27 16:57:45,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2024-06-27 16:57:45,849 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 33 [2024-06-27 16:57:45,849 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 123 transitions, 1220 flow. Second operand has 14 states, 14 states have (on average 9.642857142857142) internal successors, (135), 14 states have internal predecessors, (135), 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) [2024-06-27 16:57:45,849 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:57:45,849 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 33 [2024-06-27 16:57:45,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:57:46,272 INFO L124 PetriNetUnfolderBase]: 2373/3728 cut-off events. [2024-06-27 16:57:46,272 INFO L125 PetriNetUnfolderBase]: For 14212/14330 co-relation queries the response was YES. [2024-06-27 16:57:46,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15510 conditions, 3728 events. 2373/3728 cut-off events. For 14212/14330 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 19910 event pairs, 1220 based on Foata normal form. 200/3917 useless extension candidates. Maximal degree in co-relation 15036. Up to 1781 conditions per place. [2024-06-27 16:57:46,291 INFO L140 encePairwiseOnDemand]: 26/33 looper letters, 34 selfloop transitions, 3 changer transitions 94/136 dead transitions. [2024-06-27 16:57:46,291 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 136 transitions, 1540 flow [2024-06-27 16:57:46,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 16:57:46,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 16:57:46,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 110 transitions. [2024-06-27 16:57:46,292 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-27 16:57:46,292 INFO L175 Difference]: Start difference. First operand has 126 places, 123 transitions, 1220 flow. Second operand 7 states and 110 transitions. [2024-06-27 16:57:46,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 136 transitions, 1540 flow [2024-06-27 16:57:46,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 136 transitions, 1414 flow, removed 6 selfloop flow, removed 10 redundant places. [2024-06-27 16:57:46,327 INFO L231 Difference]: Finished difference. Result has 123 places, 42 transitions, 253 flow [2024-06-27 16:57:46,327 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=897, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=253, PETRI_PLACES=123, PETRI_TRANSITIONS=42} [2024-06-27 16:57:46,328 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 88 predicate places. [2024-06-27 16:57:46,328 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 42 transitions, 253 flow [2024-06-27 16:57:46,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 9.642857142857142) internal successors, (135), 14 states have internal predecessors, (135), 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) [2024-06-27 16:57:46,329 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:57:46,330 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:57:46,343 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-06-27 16:57:46,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-06-27 16:57:46,541 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:57:46,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:57:46,541 INFO L85 PathProgramCache]: Analyzing trace with hash 1886568299, now seen corresponding path program 9 times [2024-06-27 16:57:46,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:57:46,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797867332] [2024-06-27 16:57:46,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:57:46,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:57:46,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:57:46,614 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:57:46,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:57:46,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797867332] [2024-06-27 16:57:46,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797867332] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:57:46,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941933401] [2024-06-27 16:57:46,615 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 16:57:46,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:57:46,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:57:46,616 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) [2024-06-27 16:57:46,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-06-27 16:57:46,686 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-06-27 16:57:46,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:57:46,687 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 10 conjunts are in the unsatisfiable core [2024-06-27 16:57:46,688 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:57:46,776 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:57:46,776 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:57:46,840 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:57:46,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941933401] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:57:46,841 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:57:46,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2024-06-27 16:57:46,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353406882] [2024-06-27 16:57:46,841 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:57:46,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-06-27 16:57:46,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:57:46,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-06-27 16:57:46,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2024-06-27 16:57:46,867 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 33 [2024-06-27 16:57:46,868 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 42 transitions, 253 flow. Second operand has 18 states, 18 states have (on average 7.888888888888889) internal successors, (142), 18 states have internal predecessors, (142), 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) [2024-06-27 16:57:46,868 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:57:46,868 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 33 [2024-06-27 16:57:46,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:57:47,406 INFO L124 PetriNetUnfolderBase]: 2782/4050 cut-off events. [2024-06-27 16:57:47,406 INFO L125 PetriNetUnfolderBase]: For 9406/9424 co-relation queries the response was YES. [2024-06-27 16:57:47,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15248 conditions, 4050 events. 2782/4050 cut-off events. For 9406/9424 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 19841 event pairs, 703 based on Foata normal form. 18/3815 useless extension candidates. Maximal degree in co-relation 15217. Up to 1597 conditions per place. [2024-06-27 16:57:47,427 INFO L140 encePairwiseOnDemand]: 23/33 looper letters, 134 selfloop transitions, 22 changer transitions 0/160 dead transitions. [2024-06-27 16:57:47,427 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 160 transitions, 1313 flow [2024-06-27 16:57:47,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 16:57:47,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 16:57:47,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 177 transitions. [2024-06-27 16:57:47,428 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4125874125874126 [2024-06-27 16:57:47,429 INFO L175 Difference]: Start difference. First operand has 123 places, 42 transitions, 253 flow. Second operand 13 states and 177 transitions. [2024-06-27 16:57:47,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 160 transitions, 1313 flow [2024-06-27 16:57:47,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 160 transitions, 1139 flow, removed 56 selfloop flow, removed 19 redundant places. [2024-06-27 16:57:47,445 INFO L231 Difference]: Finished difference. Result has 69 places, 58 transitions, 345 flow [2024-06-27 16:57:47,445 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=195, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=345, PETRI_PLACES=69, PETRI_TRANSITIONS=58} [2024-06-27 16:57:47,445 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 34 predicate places. [2024-06-27 16:57:47,446 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 58 transitions, 345 flow [2024-06-27 16:57:47,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 7.888888888888889) internal successors, (142), 18 states have internal predecessors, (142), 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) [2024-06-27 16:57:47,446 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:57:47,446 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:57:47,459 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-06-27 16:57:47,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-06-27 16:57:47,656 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:57:47,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:57:47,657 INFO L85 PathProgramCache]: Analyzing trace with hash 918457125, now seen corresponding path program 10 times [2024-06-27 16:57:47,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:57:47,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497312079] [2024-06-27 16:57:47,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:57:47,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:57:47,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:57:47,732 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:57:47,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:57:47,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497312079] [2024-06-27 16:57:47,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497312079] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:57:47,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068540722] [2024-06-27 16:57:47,732 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 16:57:47,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:57:47,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:57:47,733 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) [2024-06-27 16:57:47,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-06-27 16:57:47,786 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 16:57:47,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:57:47,787 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 8 conjunts are in the unsatisfiable core [2024-06-27 16:57:47,787 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:57:47,839 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:57:47,839 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:57:47,906 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:57:47,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068540722] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:57:47,907 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:57:47,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 17 [2024-06-27 16:57:47,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470034259] [2024-06-27 16:57:47,907 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:57:47,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-06-27 16:57:47,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:57:47,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-06-27 16:57:47,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2024-06-27 16:57:47,911 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2024-06-27 16:57:47,912 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 58 transitions, 345 flow. Second operand has 17 states, 17 states have (on average 7.529411764705882) internal successors, (128), 17 states have internal predecessors, (128), 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) [2024-06-27 16:57:47,912 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:57:47,912 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2024-06-27 16:57:47,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:57:49,195 INFO L124 PetriNetUnfolderBase]: 6912/9869 cut-off events. [2024-06-27 16:57:49,195 INFO L125 PetriNetUnfolderBase]: For 17696/17696 co-relation queries the response was YES. [2024-06-27 16:57:49,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36344 conditions, 9869 events. 6912/9869 cut-off events. For 17696/17696 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 47966 event pairs, 142 based on Foata normal form. 23/9892 useless extension candidates. Maximal degree in co-relation 36324. Up to 3710 conditions per place. [2024-06-27 16:57:49,246 INFO L140 encePairwiseOnDemand]: 19/33 looper letters, 297 selfloop transitions, 179 changer transitions 0/477 dead transitions. [2024-06-27 16:57:49,246 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 477 transitions, 3756 flow [2024-06-27 16:57:49,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-06-27 16:57:49,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2024-06-27 16:57:49,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 476 transitions. [2024-06-27 16:57:49,252 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.379585326953748 [2024-06-27 16:57:49,252 INFO L175 Difference]: Start difference. First operand has 69 places, 58 transitions, 345 flow. Second operand 38 states and 476 transitions. [2024-06-27 16:57:49,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 477 transitions, 3756 flow [2024-06-27 16:57:49,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 477 transitions, 3743 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-27 16:57:49,286 INFO L231 Difference]: Finished difference. Result has 120 places, 221 transitions, 2149 flow [2024-06-27 16:57:49,287 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=336, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=2149, PETRI_PLACES=120, PETRI_TRANSITIONS=221} [2024-06-27 16:57:49,287 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 85 predicate places. [2024-06-27 16:57:49,288 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 221 transitions, 2149 flow [2024-06-27 16:57:49,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 7.529411764705882) internal successors, (128), 17 states have internal predecessors, (128), 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) [2024-06-27 16:57:49,288 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:57:49,288 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:57:49,301 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-06-27 16:57:49,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-06-27 16:57:49,499 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:57:49,499 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:57:49,499 INFO L85 PathProgramCache]: Analyzing trace with hash 1312565055, now seen corresponding path program 11 times [2024-06-27 16:57:49,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:57:49,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235939889] [2024-06-27 16:57:49,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:57:49,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:57:49,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:57:49,586 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-06-27 16:57:49,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:57:49,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235939889] [2024-06-27 16:57:49,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235939889] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:57:49,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234450494] [2024-06-27 16:57:49,587 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-27 16:57:49,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:57:49,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:57:49,588 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) [2024-06-27 16:57:49,592 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-06-27 16:57:49,652 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-06-27 16:57:49,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:57:49,653 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 8 conjunts are in the unsatisfiable core [2024-06-27 16:57:49,654 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:57:49,727 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:57:49,727 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:57:49,790 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:57:49,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234450494] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:57:49,790 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:57:49,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 17 [2024-06-27 16:57:49,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102761157] [2024-06-27 16:57:49,790 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:57:49,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-06-27 16:57:49,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:57:49,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-06-27 16:57:49,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2024-06-27 16:57:49,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2024-06-27 16:57:49,821 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 221 transitions, 2149 flow. Second operand has 17 states, 17 states have (on average 7.117647058823529) internal successors, (121), 17 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) [2024-06-27 16:57:49,821 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:57:49,821 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2024-06-27 16:57:49,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:57:51,994 INFO L124 PetriNetUnfolderBase]: 10782/15332 cut-off events. [2024-06-27 16:57:51,994 INFO L125 PetriNetUnfolderBase]: For 69288/69288 co-relation queries the response was YES. [2024-06-27 16:57:52,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70059 conditions, 15332 events. 10782/15332 cut-off events. For 69288/69288 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 80050 event pairs, 651 based on Foata normal form. 24/15356 useless extension candidates. Maximal degree in co-relation 70021. Up to 6320 conditions per place. [2024-06-27 16:57:52,107 INFO L140 encePairwiseOnDemand]: 18/33 looper letters, 344 selfloop transitions, 477 changer transitions 0/822 dead transitions. [2024-06-27 16:57:52,108 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 822 transitions, 8513 flow [2024-06-27 16:57:52,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-06-27 16:57:52,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2024-06-27 16:57:52,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 578 transitions. [2024-06-27 16:57:52,110 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39807162534435264 [2024-06-27 16:57:52,110 INFO L175 Difference]: Start difference. First operand has 120 places, 221 transitions, 2149 flow. Second operand 44 states and 578 transitions. [2024-06-27 16:57:52,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 822 transitions, 8513 flow [2024-06-27 16:57:52,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 822 transitions, 8302 flow, removed 44 selfloop flow, removed 5 redundant places. [2024-06-27 16:57:52,546 INFO L231 Difference]: Finished difference. Result has 176 places, 542 transitions, 6789 flow [2024-06-27 16:57:52,546 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=2084, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=6789, PETRI_PLACES=176, PETRI_TRANSITIONS=542} [2024-06-27 16:57:52,547 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 141 predicate places. [2024-06-27 16:57:52,547 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 542 transitions, 6789 flow [2024-06-27 16:57:52,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 7.117647058823529) internal successors, (121), 17 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) [2024-06-27 16:57:52,547 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:57:52,547 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:57:52,557 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-06-27 16:57:52,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-06-27 16:57:52,748 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:57:52,748 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:57:52,748 INFO L85 PathProgramCache]: Analyzing trace with hash 418689063, now seen corresponding path program 12 times [2024-06-27 16:57:52,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:57:52,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854908465] [2024-06-27 16:57:52,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:57:52,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:57:52,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:57:52,833 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-06-27 16:57:52,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:57:52,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854908465] [2024-06-27 16:57:52,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854908465] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:57:52,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52904883] [2024-06-27 16:57:52,834 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-27 16:57:52,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:57:52,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:57:52,835 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) [2024-06-27 16:57:52,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-06-27 16:57:52,915 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-06-27 16:57:52,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:57:52,916 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 8 conjunts are in the unsatisfiable core [2024-06-27 16:57:52,917 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:57:52,997 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:57:52,997 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:57:53,077 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:57:53,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52904883] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:57:53,077 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:57:53,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 18 [2024-06-27 16:57:53,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88451125] [2024-06-27 16:57:53,078 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:57:53,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-06-27 16:57:53,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:57:53,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-06-27 16:57:53,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2024-06-27 16:57:53,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2024-06-27 16:57:53,104 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 542 transitions, 6789 flow. Second operand has 18 states, 18 states have (on average 6.777777777777778) internal successors, (122), 18 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:57:53,104 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:57:53,104 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2024-06-27 16:57:53,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:57:58,049 INFO L124 PetriNetUnfolderBase]: 16227/22868 cut-off events. [2024-06-27 16:57:58,049 INFO L125 PetriNetUnfolderBase]: For 150540/150540 co-relation queries the response was YES. [2024-06-27 16:57:58,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120155 conditions, 22868 events. 16227/22868 cut-off events. For 150540/150540 co-relation queries the response was YES. Maximal size of possible extension queue 571. Compared 123532 event pairs, 556 based on Foata normal form. 24/22892 useless extension candidates. Maximal degree in co-relation 120099. Up to 9366 conditions per place. [2024-06-27 16:57:58,545 INFO L140 encePairwiseOnDemand]: 18/33 looper letters, 749 selfloop transitions, 746 changer transitions 0/1496 dead transitions. [2024-06-27 16:57:58,545 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 1496 transitions, 17740 flow [2024-06-27 16:57:58,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2024-06-27 16:57:58,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2024-06-27 16:57:58,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 1320 transitions. [2024-06-27 16:57:58,554 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39603960396039606 [2024-06-27 16:57:58,554 INFO L175 Difference]: Start difference. First operand has 176 places, 542 transitions, 6789 flow. Second operand 101 states and 1320 transitions. [2024-06-27 16:57:58,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 1496 transitions, 17740 flow [2024-06-27 16:57:59,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 1496 transitions, 16893 flow, removed 255 selfloop flow, removed 6 redundant places. [2024-06-27 16:57:59,937 INFO L231 Difference]: Finished difference. Result has 306 places, 895 transitions, 13124 flow [2024-06-27 16:57:59,938 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=6341, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=542, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=411, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=101, PETRI_FLOW=13124, PETRI_PLACES=306, PETRI_TRANSITIONS=895} [2024-06-27 16:57:59,938 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 271 predicate places. [2024-06-27 16:57:59,938 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 895 transitions, 13124 flow [2024-06-27 16:57:59,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 6.777777777777778) internal successors, (122), 18 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:57:59,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:57:59,938 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:57:59,952 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-06-27 16:58:00,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:58:00,139 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:58:00,139 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:58:00,139 INFO L85 PathProgramCache]: Analyzing trace with hash -1966177543, now seen corresponding path program 13 times [2024-06-27 16:58:00,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:58:00,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361578735] [2024-06-27 16:58:00,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:58:00,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:58:00,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:58:00,230 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-06-27 16:58:00,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:58:00,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361578735] [2024-06-27 16:58:00,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361578735] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:58:00,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444581901] [2024-06-27 16:58:00,231 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-06-27 16:58:00,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:58:00,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:58:00,232 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) [2024-06-27 16:58:00,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-06-27 16:58:00,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:58:00,291 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 10 conjunts are in the unsatisfiable core [2024-06-27 16:58:00,292 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:58:00,380 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-06-27 16:58:00,380 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:58:00,462 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-06-27 16:58:00,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444581901] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:58:00,462 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:58:00,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2024-06-27 16:58:00,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138699069] [2024-06-27 16:58:00,463 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:58:00,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-06-27 16:58:00,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:58:00,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-06-27 16:58:00,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2024-06-27 16:58:00,497 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 33 [2024-06-27 16:58:00,497 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 895 transitions, 13124 flow. Second operand has 20 states, 20 states have (on average 7.55) internal successors, (151), 20 states have internal predecessors, (151), 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) [2024-06-27 16:58:00,497 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:58:00,497 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 33 [2024-06-27 16:58:00,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:58:04,697 INFO L124 PetriNetUnfolderBase]: 13214/18784 cut-off events. [2024-06-27 16:58:04,697 INFO L125 PetriNetUnfolderBase]: For 143245/143245 co-relation queries the response was YES. [2024-06-27 16:58:04,829 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109171 conditions, 18784 events. 13214/18784 cut-off events. For 143245/143245 co-relation queries the response was YES. Maximal size of possible extension queue 624. Compared 108507 event pairs, 1088 based on Foata normal form. 18/18794 useless extension candidates. Maximal degree in co-relation 109079. Up to 8750 conditions per place. [2024-06-27 16:58:05,027 INFO L140 encePairwiseOnDemand]: 21/33 looper letters, 631 selfloop transitions, 605 changer transitions 0/1240 dead transitions. [2024-06-27 16:58:05,027 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 1240 transitions, 19147 flow [2024-06-27 16:58:05,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-06-27 16:58:05,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-06-27 16:58:05,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 406 transitions. [2024-06-27 16:58:05,029 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4556677890011223 [2024-06-27 16:58:05,029 INFO L175 Difference]: Start difference. First operand has 306 places, 895 transitions, 13124 flow. Second operand 27 states and 406 transitions. [2024-06-27 16:58:05,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 1240 transitions, 19147 flow [2024-06-27 16:58:07,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 1240 transitions, 17211 flow, removed 538 selfloop flow, removed 16 redundant places. [2024-06-27 16:58:07,270 INFO L231 Difference]: Finished difference. Result has 323 places, 1010 transitions, 14835 flow [2024-06-27 16:58:07,271 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=11803, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=895, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=505, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=14835, PETRI_PLACES=323, PETRI_TRANSITIONS=1010} [2024-06-27 16:58:07,271 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 288 predicate places. [2024-06-27 16:58:07,271 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 1010 transitions, 14835 flow [2024-06-27 16:58:07,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 7.55) internal successors, (151), 20 states have internal predecessors, (151), 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) [2024-06-27 16:58:07,272 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:58:07,272 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:58:07,282 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-06-27 16:58:07,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-06-27 16:58:07,472 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:58:07,473 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:58:07,473 INFO L85 PathProgramCache]: Analyzing trace with hash -965384307, now seen corresponding path program 14 times [2024-06-27 16:58:07,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:58:07,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837941008] [2024-06-27 16:58:07,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:58:07,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:58:07,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:58:07,556 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-06-27 16:58:07,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:58:07,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837941008] [2024-06-27 16:58:07,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837941008] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:58:07,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763715501] [2024-06-27 16:58:07,557 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 16:58:07,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:58:07,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:58:07,558 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) [2024-06-27 16:58:07,578 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-06-27 16:58:07,622 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 16:58:07,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:58:07,623 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 10 conjunts are in the unsatisfiable core [2024-06-27 16:58:07,623 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:58:07,705 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-06-27 16:58:07,705 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:58:07,789 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-06-27 16:58:07,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763715501] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:58:07,790 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:58:07,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2024-06-27 16:58:07,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926655036] [2024-06-27 16:58:07,790 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:58:07,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-06-27 16:58:07,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:58:07,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-06-27 16:58:07,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2024-06-27 16:58:07,829 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 33 [2024-06-27 16:58:07,830 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 1010 transitions, 14835 flow. Second operand has 21 states, 21 states have (on average 7.142857142857143) internal successors, (150), 21 states have internal predecessors, (150), 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) [2024-06-27 16:58:07,830 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:58:07,830 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 33 [2024-06-27 16:58:07,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:58:12,192 INFO L124 PetriNetUnfolderBase]: 14549/20665 cut-off events. [2024-06-27 16:58:12,192 INFO L125 PetriNetUnfolderBase]: For 154106/154106 co-relation queries the response was YES. [2024-06-27 16:58:12,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118442 conditions, 20665 events. 14549/20665 cut-off events. For 154106/154106 co-relation queries the response was YES. Maximal size of possible extension queue 682. Compared 120958 event pairs, 1849 based on Foata normal form. 17/20666 useless extension candidates. Maximal degree in co-relation 118355. Up to 9738 conditions per place. [2024-06-27 16:58:12,394 INFO L140 encePairwiseOnDemand]: 22/33 looper letters, 711 selfloop transitions, 538 changer transitions 0/1253 dead transitions. [2024-06-27 16:58:12,394 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 1253 transitions, 19720 flow [2024-06-27 16:58:12,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-06-27 16:58:12,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-06-27 16:58:12,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 278 transitions. [2024-06-27 16:58:12,395 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4433811802232855 [2024-06-27 16:58:12,395 INFO L175 Difference]: Start difference. First operand has 323 places, 1010 transitions, 14835 flow. Second operand 19 states and 278 transitions. [2024-06-27 16:58:12,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 1253 transitions, 19720 flow [2024-06-27 16:58:14,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 1253 transitions, 19109 flow, removed 77 selfloop flow, removed 15 redundant places. [2024-06-27 16:58:14,168 INFO L231 Difference]: Finished difference. Result has 331 places, 1082 transitions, 17047 flow [2024-06-27 16:58:14,169 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=14224, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1007, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=463, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=499, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=17047, PETRI_PLACES=331, PETRI_TRANSITIONS=1082} [2024-06-27 16:58:14,169 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 296 predicate places. [2024-06-27 16:58:14,169 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 1082 transitions, 17047 flow [2024-06-27 16:58:14,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 7.142857142857143) internal successors, (150), 21 states have internal predecessors, (150), 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) [2024-06-27 16:58:14,169 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:58:14,170 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:58:14,180 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-06-27 16:58:14,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:58:14,380 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:58:14,380 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:58:14,381 INFO L85 PathProgramCache]: Analyzing trace with hash 365972129, now seen corresponding path program 15 times [2024-06-27 16:58:14,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:58:14,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64745337] [2024-06-27 16:58:14,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:58:14,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:58:14,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:58:14,466 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-06-27 16:58:14,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:58:14,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64745337] [2024-06-27 16:58:14,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64745337] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:58:14,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318581166] [2024-06-27 16:58:14,466 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 16:58:14,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:58:14,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:58:14,467 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) [2024-06-27 16:58:14,468 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-06-27 16:58:14,527 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-06-27 16:58:14,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:58:14,528 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 10 conjunts are in the unsatisfiable core [2024-06-27 16:58:14,529 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:58:14,610 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-06-27 16:58:14,611 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:58:14,688 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-06-27 16:58:14,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318581166] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:58:14,688 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:58:14,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2024-06-27 16:58:14,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901903772] [2024-06-27 16:58:14,688 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:58:14,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-06-27 16:58:14,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:58:14,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-06-27 16:58:14,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2024-06-27 16:58:14,715 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 33 [2024-06-27 16:58:14,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 1082 transitions, 17047 flow. Second operand has 19 states, 19 states have (on average 7.2105263157894735) internal successors, (137), 19 states have internal predecessors, (137), 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) [2024-06-27 16:58:14,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:58:14,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 33 [2024-06-27 16:58:14,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:58:19,329 INFO L124 PetriNetUnfolderBase]: 14691/20830 cut-off events. [2024-06-27 16:58:19,329 INFO L125 PetriNetUnfolderBase]: For 192506/192506 co-relation queries the response was YES. [2024-06-27 16:58:19,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 124174 conditions, 20830 events. 14691/20830 cut-off events. For 192506/192506 co-relation queries the response was YES. Maximal size of possible extension queue 686. Compared 121176 event pairs, 1850 based on Foata normal form. 18/20841 useless extension candidates. Maximal degree in co-relation 124089. Up to 9882 conditions per place. [2024-06-27 16:58:19,565 INFO L140 encePairwiseOnDemand]: 21/33 looper letters, 678 selfloop transitions, 529 changer transitions 0/1211 dead transitions. [2024-06-27 16:58:19,566 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 1211 transitions, 20344 flow [2024-06-27 16:58:19,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-06-27 16:58:19,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-06-27 16:58:19,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 239 transitions. [2024-06-27 16:58:19,568 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42602495543672014 [2024-06-27 16:58:19,568 INFO L175 Difference]: Start difference. First operand has 331 places, 1082 transitions, 17047 flow. Second operand 17 states and 239 transitions. [2024-06-27 16:58:19,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 1211 transitions, 20344 flow [2024-06-27 16:58:21,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 1211 transitions, 20166 flow, removed 33 selfloop flow, removed 8 redundant places. [2024-06-27 16:58:21,634 INFO L231 Difference]: Finished difference. Result has 341 places, 1088 transitions, 18098 flow [2024-06-27 16:58:21,635 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=16893, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1082, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=523, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=556, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=18098, PETRI_PLACES=341, PETRI_TRANSITIONS=1088} [2024-06-27 16:58:21,635 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 306 predicate places. [2024-06-27 16:58:21,635 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 1088 transitions, 18098 flow [2024-06-27 16:58:21,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 7.2105263157894735) internal successors, (137), 19 states have internal predecessors, (137), 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) [2024-06-27 16:58:21,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:58:21,635 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:58:21,646 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-06-27 16:58:21,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:58:21,836 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:58:21,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:58:21,836 INFO L85 PathProgramCache]: Analyzing trace with hash -2064162839, now seen corresponding path program 16 times [2024-06-27 16:58:21,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:58:21,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177321870] [2024-06-27 16:58:21,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:58:21,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:58:21,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:58:21,930 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-06-27 16:58:21,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:58:21,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177321870] [2024-06-27 16:58:21,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177321870] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:58:21,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055752146] [2024-06-27 16:58:21,931 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 16:58:21,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:58:21,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:58:21,932 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) [2024-06-27 16:58:21,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-06-27 16:58:21,990 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 16:58:21,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:58:21,991 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 8 conjunts are in the unsatisfiable core [2024-06-27 16:58:21,992 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:58:22,067 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:58:22,067 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:58:22,155 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:58:22,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055752146] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:58:22,155 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:58:22,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2024-06-27 16:58:22,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755366906] [2024-06-27 16:58:22,156 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:58:22,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-06-27 16:58:22,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:58:22,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-06-27 16:58:22,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2024-06-27 16:58:22,181 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2024-06-27 16:58:22,181 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 1088 transitions, 18098 flow. Second operand has 19 states, 19 states have (on average 6.7368421052631575) internal successors, (128), 19 states have internal predecessors, (128), 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) [2024-06-27 16:58:22,181 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:58:22,181 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2024-06-27 16:58:22,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:58:32,693 INFO L124 PetriNetUnfolderBase]: 31365/44043 cut-off events. [2024-06-27 16:58:32,694 INFO L125 PetriNetUnfolderBase]: For 452222/452222 co-relation queries the response was YES. [2024-06-27 16:58:33,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 265593 conditions, 44043 events. 31365/44043 cut-off events. For 452222/452222 co-relation queries the response was YES. Maximal size of possible extension queue 1110. Compared 260380 event pairs, 2636 based on Foata normal form. 23/44066 useless extension candidates. Maximal degree in co-relation 265509. Up to 18719 conditions per place. [2024-06-27 16:58:33,652 INFO L140 encePairwiseOnDemand]: 19/33 looper letters, 771 selfloop transitions, 1229 changer transitions 0/2001 dead transitions. [2024-06-27 16:58:33,652 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 2001 transitions, 33123 flow [2024-06-27 16:58:33,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2024-06-27 16:58:33,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2024-06-27 16:58:33,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 888 transitions. [2024-06-27 16:58:33,654 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39572192513368987 [2024-06-27 16:58:33,654 INFO L175 Difference]: Start difference. First operand has 341 places, 1088 transitions, 18098 flow. Second operand 68 states and 888 transitions. [2024-06-27 16:58:33,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 2001 transitions, 33123 flow [2024-06-27 16:58:41,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 400 places, 2001 transitions, 32593 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-27 16:58:41,760 INFO L231 Difference]: Finished difference. Result has 430 places, 1577 transitions, 30058 flow [2024-06-27 16:58:41,761 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=17727, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1088, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=776, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=68, PETRI_FLOW=30058, PETRI_PLACES=430, PETRI_TRANSITIONS=1577} [2024-06-27 16:58:41,762 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 395 predicate places. [2024-06-27 16:58:41,762 INFO L495 AbstractCegarLoop]: Abstraction has has 430 places, 1577 transitions, 30058 flow [2024-06-27 16:58:41,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 6.7368421052631575) internal successors, (128), 19 states have internal predecessors, (128), 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) [2024-06-27 16:58:41,762 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:58:41,762 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:58:41,775 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-06-27 16:58:41,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:58:41,973 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:58:41,973 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:58:41,973 INFO L85 PathProgramCache]: Analyzing trace with hash -707317179, now seen corresponding path program 17 times [2024-06-27 16:58:41,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:58:41,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133598564] [2024-06-27 16:58:41,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:58:41,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:58:41,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:58:42,053 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-06-27 16:58:42,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:58:42,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133598564] [2024-06-27 16:58:42,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133598564] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:58:42,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163238163] [2024-06-27 16:58:42,054 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-27 16:58:42,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:58:42,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:58:42,055 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) [2024-06-27 16:58:42,056 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-06-27 16:58:42,148 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-06-27 16:58:42,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:58:42,150 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 8 conjunts are in the unsatisfiable core [2024-06-27 16:58:42,150 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:58:42,220 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:58:42,220 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:58:42,294 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:58:42,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [163238163] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:58:42,294 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:58:42,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2024-06-27 16:58:42,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673294782] [2024-06-27 16:58:42,295 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:58:42,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-06-27 16:58:42,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:58:42,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-06-27 16:58:42,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2024-06-27 16:58:42,315 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2024-06-27 16:58:42,315 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 430 places, 1577 transitions, 30058 flow. Second operand has 19 states, 19 states have (on average 6.578947368421052) internal successors, (125), 19 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:58:42,315 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:58:42,315 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2024-06-27 16:58:42,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand