./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/clever.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/clever.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 f1b460e4dbdd0bf3097d690d1720c7a2141566e2aa4ca1ed003c7fa25661851d --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 16:41:42,571 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 16:41:42,650 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 16:41:42,654 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 16:41:42,654 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 16:41:42,671 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 16:41:42,671 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 16:41:42,672 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 16:41:42,672 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 16:41:42,673 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 16:41:42,673 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 16:41:42,673 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 16:41:42,674 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 16:41:42,674 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 16:41:42,675 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 16:41:42,675 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 16:41:42,675 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 16:41:42,676 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 16:41:42,676 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 16:41:42,677 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 16:41:42,677 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 16:41:42,681 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 16:41:42,681 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 16:41:42,681 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 16:41:42,681 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 16:41:42,682 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 16:41:42,682 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 16:41:42,682 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 16:41:42,682 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 16:41:42,683 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 16:41:42,683 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 16:41:42,683 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 16:41:42,683 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 16:41:42,684 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 16:41:42,684 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 16:41:42,684 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 16:41:42,684 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 16:41:42,685 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 16:41:42,685 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 16:41:42,685 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 16:41:42,685 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 16:41:42,690 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 16:41:42,690 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 16:41:42,691 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f1b460e4dbdd0bf3097d690d1720c7a2141566e2aa4ca1ed003c7fa25661851d [2024-06-27 16:41:42,984 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 16:41:43,011 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 16:41:43,013 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 16:41:43,014 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 16:41:43,015 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 16:41:43,016 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/clever.wvr.c [2024-06-27 16:41:44,249 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 16:41:44,444 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 16:41:44,445 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/clever.wvr.c [2024-06-27 16:41:44,451 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ca4a06b4e/2f4a3e9c07c84b53a3a771025239caae/FLAGac6546027 [2024-06-27 16:41:44,462 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ca4a06b4e/2f4a3e9c07c84b53a3a771025239caae [2024-06-27 16:41:44,468 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 16:41:44,469 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-06-27 16:41:44,472 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 16:41:44,472 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 16:41:44,477 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 16:41:44,477 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 04:41:44" (1/1) ... [2024-06-27 16:41:44,478 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7904d06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:41:44, skipping insertion in model container [2024-06-27 16:41:44,479 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 04:41:44" (1/1) ... [2024-06-27 16:41:44,497 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 16:41:44,669 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/clever.wvr.c[2159,2172] [2024-06-27 16:41:44,701 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 16:41:44,709 INFO L202 MainTranslator]: Completed pre-run [2024-06-27 16:41:44,726 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/clever.wvr.c[2159,2172] [2024-06-27 16:41:44,731 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 16:41:44,751 INFO L206 MainTranslator]: Completed translation [2024-06-27 16:41:44,751 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:41:44 WrapperNode [2024-06-27 16:41:44,752 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 16:41:44,753 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 16:41:44,753 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 16:41:44,754 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 16:41:44,760 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:41:44" (1/1) ... [2024-06-27 16:41:44,778 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:41:44" (1/1) ... [2024-06-27 16:41:44,800 INFO L138 Inliner]: procedures = 18, calls = 11, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 72 [2024-06-27 16:41:44,801 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 16:41:44,801 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 16:41:44,801 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 16:41:44,801 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 16:41:44,812 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:41:44" (1/1) ... [2024-06-27 16:41:44,813 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:41:44" (1/1) ... [2024-06-27 16:41:44,814 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:41:44" (1/1) ... [2024-06-27 16:41:44,825 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-27 16:41:44,826 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:41:44" (1/1) ... [2024-06-27 16:41:44,828 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:41:44" (1/1) ... [2024-06-27 16:41:44,831 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:41:44" (1/1) ... [2024-06-27 16:41:44,834 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:41:44" (1/1) ... [2024-06-27 16:41:44,835 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:41:44" (1/1) ... [2024-06-27 16:41:44,836 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:41:44" (1/1) ... [2024-06-27 16:41:44,837 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 16:41:44,838 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 16:41:44,838 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 16:41:44,838 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 16:41:44,839 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:41:44" (1/1) ... [2024-06-27 16:41:44,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 16:41:44,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:41:44,889 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 16:41:44,916 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 16:41:44,946 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 16:41:44,946 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-06-27 16:41:44,946 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-06-27 16:41:44,946 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-06-27 16:41:44,947 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-06-27 16:41:44,947 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 16:41:44,947 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 16:41:44,947 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 16:41:44,952 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 16:41:45,036 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 16:41:45,038 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 16:41:45,187 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 16:41:45,188 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 16:41:45,380 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 16:41:45,381 INFO L320 CfgBuilder]: Removed 3 assume(true) statements. [2024-06-27 16:41:45,381 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 04:41:45 BoogieIcfgContainer [2024-06-27 16:41:45,381 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 16:41:45,383 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 16:41:45,383 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 16:41:45,386 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 16:41:45,386 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 04:41:44" (1/3) ... [2024-06-27 16:41:45,387 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ee7dda8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 04:41:45, skipping insertion in model container [2024-06-27 16:41:45,387 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:41:44" (2/3) ... [2024-06-27 16:41:45,387 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ee7dda8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 04:41:45, skipping insertion in model container [2024-06-27 16:41:45,388 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 04:41:45" (3/3) ... [2024-06-27 16:41:45,389 INFO L112 eAbstractionObserver]: Analyzing ICFG clever.wvr.c [2024-06-27 16:41:45,400 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2024-06-27 16:41:45,408 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 16:41:45,408 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-06-27 16:41:45,408 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 16:41:45,441 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-06-27 16:41:45,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 24 places, 20 transitions, 54 flow [2024-06-27 16:41:45,497 INFO L124 PetriNetUnfolderBase]: 3/18 cut-off events. [2024-06-27 16:41:45,497 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-06-27 16:41:45,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27 conditions, 18 events. 3/18 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 16 event pairs, 0 based on Foata normal form. 0/14 useless extension candidates. Maximal degree in co-relation 13. Up to 2 conditions per place. [2024-06-27 16:41:45,500 INFO L82 GeneralOperation]: Start removeDead. Operand has 24 places, 20 transitions, 54 flow [2024-06-27 16:41:45,505 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 21 places, 17 transitions, 46 flow [2024-06-27 16:41:45,519 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 16:41:45,525 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;@66db83cd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 16:41:45,525 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-06-27 16:41:45,538 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 16:41:45,539 INFO L124 PetriNetUnfolderBase]: 3/16 cut-off events. [2024-06-27 16:41:45,539 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-06-27 16:41:45,539 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:41:45,540 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:41:45,540 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:41:45,545 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:41:45,545 INFO L85 PathProgramCache]: Analyzing trace with hash 871523174, now seen corresponding path program 1 times [2024-06-27 16:41:45,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:41:45,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529266711] [2024-06-27 16:41:45,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:41:45,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:41:45,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:41:45,985 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 16:41:45,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:41:45,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529266711] [2024-06-27 16:41:45,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529266711] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:41:45,986 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:41:45,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 16:41:45,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019733570] [2024-06-27 16:41:45,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:41:45,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 16:41:46,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:41:46,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 16:41:46,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 16:41:46,041 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-06-27 16:41:46,043 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 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 16:41:46,044 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:41:46,044 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-06-27 16:41:46,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:41:46,153 INFO L124 PetriNetUnfolderBase]: 106/171 cut-off events. [2024-06-27 16:41:46,153 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2024-06-27 16:41:46,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 364 conditions, 171 events. 106/171 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 511 event pairs, 19 based on Foata normal form. 1/106 useless extension candidates. Maximal degree in co-relation 318. Up to 110 conditions per place. [2024-06-27 16:41:46,157 INFO L140 encePairwiseOnDemand]: 16/20 looper letters, 21 selfloop transitions, 3 changer transitions 1/28 dead transitions. [2024-06-27 16:41:46,158 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 28 transitions, 127 flow [2024-06-27 16:41:46,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 16:41:46,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 16:41:46,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 41 transitions. [2024-06-27 16:41:46,168 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6833333333333333 [2024-06-27 16:41:46,170 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 46 flow. Second operand 3 states and 41 transitions. [2024-06-27 16:41:46,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 28 transitions, 127 flow [2024-06-27 16:41:46,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 28 transitions, 113 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-27 16:41:46,175 INFO L231 Difference]: Finished difference. Result has 20 places, 19 transitions, 57 flow [2024-06-27 16:41:46,177 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=57, PETRI_PLACES=20, PETRI_TRANSITIONS=19} [2024-06-27 16:41:46,179 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, -1 predicate places. [2024-06-27 16:41:46,180 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 19 transitions, 57 flow [2024-06-27 16:41:46,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 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 16:41:46,180 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:41:46,180 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:41:46,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 16:41:46,181 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:41:46,182 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:41:46,182 INFO L85 PathProgramCache]: Analyzing trace with hash 1246336607, now seen corresponding path program 1 times [2024-06-27 16:41:46,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:41:46,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387471146] [2024-06-27 16:41:46,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:41:46,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:41:46,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:41:46,243 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:41:46,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:41:46,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387471146] [2024-06-27 16:41:46,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387471146] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:41:46,244 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:41:46,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 16:41:46,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831798962] [2024-06-27 16:41:46,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:41:46,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 16:41:46,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:41:46,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 16:41:46,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 16:41:46,247 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-06-27 16:41:46,248 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 19 transitions, 57 flow. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 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 16:41:46,248 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:41:46,248 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-06-27 16:41:46,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:41:46,370 INFO L124 PetriNetUnfolderBase]: 145/242 cut-off events. [2024-06-27 16:41:46,373 INFO L125 PetriNetUnfolderBase]: For 52/56 co-relation queries the response was YES. [2024-06-27 16:41:46,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 579 conditions, 242 events. 145/242 cut-off events. For 52/56 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 815 event pairs, 12 based on Foata normal form. 7/220 useless extension candidates. Maximal degree in co-relation 172. Up to 96 conditions per place. [2024-06-27 16:41:46,378 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 37 selfloop transitions, 7 changer transitions 2/49 dead transitions. [2024-06-27 16:41:46,379 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 49 transitions, 236 flow [2024-06-27 16:41:46,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 16:41:46,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 16:41:46,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 66 transitions. [2024-06-27 16:41:46,381 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.66 [2024-06-27 16:41:46,381 INFO L175 Difference]: Start difference. First operand has 20 places, 19 transitions, 57 flow. Second operand 5 states and 66 transitions. [2024-06-27 16:41:46,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 49 transitions, 236 flow [2024-06-27 16:41:46,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 49 transitions, 229 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 16:41:46,384 INFO L231 Difference]: Finished difference. Result has 26 places, 25 transitions, 105 flow [2024-06-27 16:41:46,385 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=105, PETRI_PLACES=26, PETRI_TRANSITIONS=25} [2024-06-27 16:41:46,386 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 5 predicate places. [2024-06-27 16:41:46,386 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 25 transitions, 105 flow [2024-06-27 16:41:46,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 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 16:41:46,387 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:41:46,387 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:41:46,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 16:41:46,388 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:41:46,388 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:41:46,390 INFO L85 PathProgramCache]: Analyzing trace with hash -461020965, now seen corresponding path program 2 times [2024-06-27 16:41:46,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:41:46,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433565933] [2024-06-27 16:41:46,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:41:46,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:41:46,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:41:46,485 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:41:46,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:41:46,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433565933] [2024-06-27 16:41:46,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433565933] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:41:46,489 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:41:46,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 16:41:46,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370172493] [2024-06-27 16:41:46,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:41:46,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 16:41:46,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:41:46,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 16:41:46,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 16:41:46,492 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-06-27 16:41:46,496 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 25 transitions, 105 flow. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 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 16:41:46,496 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:41:46,496 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-06-27 16:41:46,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:41:46,612 INFO L124 PetriNetUnfolderBase]: 146/238 cut-off events. [2024-06-27 16:41:46,613 INFO L125 PetriNetUnfolderBase]: For 202/202 co-relation queries the response was YES. [2024-06-27 16:41:46,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 747 conditions, 238 events. 146/238 cut-off events. For 202/202 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 773 event pairs, 14 based on Foata normal form. 4/239 useless extension candidates. Maximal degree in co-relation 306. Up to 103 conditions per place. [2024-06-27 16:41:46,620 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 31 selfloop transitions, 11 changer transitions 5/50 dead transitions. [2024-06-27 16:41:46,620 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 50 transitions, 299 flow [2024-06-27 16:41:46,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 16:41:46,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 16:41:46,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 62 transitions. [2024-06-27 16:41:46,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.62 [2024-06-27 16:41:46,625 INFO L175 Difference]: Start difference. First operand has 26 places, 25 transitions, 105 flow. Second operand 5 states and 62 transitions. [2024-06-27 16:41:46,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 50 transitions, 299 flow [2024-06-27 16:41:46,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 50 transitions, 299 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-06-27 16:41:46,632 INFO L231 Difference]: Finished difference. Result has 33 places, 29 transitions, 170 flow [2024-06-27 16:41:46,632 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=105, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=170, PETRI_PLACES=33, PETRI_TRANSITIONS=29} [2024-06-27 16:41:46,633 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 12 predicate places. [2024-06-27 16:41:46,634 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 29 transitions, 170 flow [2024-06-27 16:41:46,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 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 16:41:46,634 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:41:46,634 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:41:46,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 16:41:46,635 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:41:46,636 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:41:46,636 INFO L85 PathProgramCache]: Analyzing trace with hash -1781691219, now seen corresponding path program 1 times [2024-06-27 16:41:46,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:41:46,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031539115] [2024-06-27 16:41:46,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:41:46,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:41:46,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:41:46,708 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 16:41:46,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:41:46,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031539115] [2024-06-27 16:41:46,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031539115] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:41:46,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174767698] [2024-06-27 16:41:46,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:41:46,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:41:46,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:41:46,720 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 16:41:46,727 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 16:41:46,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:41:46,809 INFO L262 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 3 conjunts are in the unsatisfiable core [2024-06-27 16:41:46,814 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:41:46,948 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 16:41:46,948 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:41:46,978 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 16:41:46,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174767698] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:41:46,978 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:41:46,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2024-06-27 16:41:46,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313608007] [2024-06-27 16:41:46,979 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:41:46,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 16:41:46,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:41:46,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 16:41:46,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 16:41:46,981 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-06-27 16:41:46,981 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 29 transitions, 170 flow. Second operand has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 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 16:41:46,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:41:46,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-06-27 16:41:46,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:41:47,087 INFO L124 PetriNetUnfolderBase]: 127/223 cut-off events. [2024-06-27 16:41:47,087 INFO L125 PetriNetUnfolderBase]: For 330/330 co-relation queries the response was YES. [2024-06-27 16:41:47,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 841 conditions, 223 events. 127/223 cut-off events. For 330/330 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 689 event pairs, 2 based on Foata normal form. 18/239 useless extension candidates. Maximal degree in co-relation 498. Up to 91 conditions per place. [2024-06-27 16:41:47,091 INFO L140 encePairwiseOnDemand]: 15/20 looper letters, 41 selfloop transitions, 9 changer transitions 3/56 dead transitions. [2024-06-27 16:41:47,091 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 56 transitions, 409 flow [2024-06-27 16:41:47,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 16:41:47,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 16:41:47,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 65 transitions. [2024-06-27 16:41:47,093 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.65 [2024-06-27 16:41:47,093 INFO L175 Difference]: Start difference. First operand has 33 places, 29 transitions, 170 flow. Second operand 5 states and 65 transitions. [2024-06-27 16:41:47,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 56 transitions, 409 flow [2024-06-27 16:41:47,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 56 transitions, 403 flow, removed 3 selfloop flow, removed 0 redundant places. [2024-06-27 16:41:47,102 INFO L231 Difference]: Finished difference. Result has 39 places, 34 transitions, 242 flow [2024-06-27 16:41:47,102 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=242, PETRI_PLACES=39, PETRI_TRANSITIONS=34} [2024-06-27 16:41:47,103 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 18 predicate places. [2024-06-27 16:41:47,103 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 34 transitions, 242 flow [2024-06-27 16:41:47,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 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 16:41:47,104 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:41:47,104 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:41:47,123 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-06-27 16:41:47,318 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 16:41:47,319 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:41:47,319 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:41:47,320 INFO L85 PathProgramCache]: Analyzing trace with hash -505918620, now seen corresponding path program 1 times [2024-06-27 16:41:47,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:41:47,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016597928] [2024-06-27 16:41:47,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:41:47,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:41:47,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:41:47,618 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:41:47,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:41:47,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016597928] [2024-06-27 16:41:47,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016597928] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:41:47,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955751182] [2024-06-27 16:41:47,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:41:47,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:41:47,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:41:47,621 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 16:41:47,639 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 16:41:47,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:41:47,680 INFO L262 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 7 conjunts are in the unsatisfiable core [2024-06-27 16:41:47,684 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:41:47,929 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:41:47,929 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:41:48,049 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:41:48,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955751182] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:41:48,050 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:41:48,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2024-06-27 16:41:48,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235950266] [2024-06-27 16:41:48,050 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:41:48,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 16:41:48,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:41:48,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 16:41:48,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2024-06-27 16:41:48,053 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-06-27 16:41:48,055 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 34 transitions, 242 flow. Second operand has 13 states, 13 states have (on average 7.769230769230769) internal successors, (101), 13 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:41:48,058 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:41:48,058 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-06-27 16:41:48,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:41:48,343 INFO L124 PetriNetUnfolderBase]: 261/447 cut-off events. [2024-06-27 16:41:48,344 INFO L125 PetriNetUnfolderBase]: For 779/779 co-relation queries the response was YES. [2024-06-27 16:41:48,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1833 conditions, 447 events. 261/447 cut-off events. For 779/779 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1687 event pairs, 10 based on Foata normal form. 2/447 useless extension candidates. Maximal degree in co-relation 1002. Up to 188 conditions per place. [2024-06-27 16:41:48,348 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 74 selfloop transitions, 23 changer transitions 7/107 dead transitions. [2024-06-27 16:41:48,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 107 transitions, 903 flow [2024-06-27 16:41:48,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 16:41:48,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 16:41:48,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 119 transitions. [2024-06-27 16:41:48,350 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6611111111111111 [2024-06-27 16:41:48,350 INFO L175 Difference]: Start difference. First operand has 39 places, 34 transitions, 242 flow. Second operand 9 states and 119 transitions. [2024-06-27 16:41:48,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 107 transitions, 903 flow [2024-06-27 16:41:48,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 107 transitions, 893 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-27 16:41:48,356 INFO L231 Difference]: Finished difference. Result has 50 places, 53 transitions, 485 flow [2024-06-27 16:41:48,356 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=485, PETRI_PLACES=50, PETRI_TRANSITIONS=53} [2024-06-27 16:41:48,357 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 29 predicate places. [2024-06-27 16:41:48,357 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 53 transitions, 485 flow [2024-06-27 16:41:48,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.769230769230769) internal successors, (101), 13 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:41:48,357 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:41:48,357 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:41:48,379 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 16:41:48,572 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 16:41:48,573 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:41:48,573 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:41:48,573 INFO L85 PathProgramCache]: Analyzing trace with hash 1334491405, now seen corresponding path program 2 times [2024-06-27 16:41:48,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:41:48,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339839789] [2024-06-27 16:41:48,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:41:48,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:41:48,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:41:48,609 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 16:41:48,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:41:48,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339839789] [2024-06-27 16:41:48,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339839789] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:41:48,610 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:41:48,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 16:41:48,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945541192] [2024-06-27 16:41:48,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:41:48,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 16:41:48,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:41:48,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 16:41:48,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 16:41:48,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-06-27 16:41:48,612 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 53 transitions, 485 flow. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 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 16:41:48,612 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:41:48,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-06-27 16:41:48,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:41:48,699 INFO L124 PetriNetUnfolderBase]: 247/423 cut-off events. [2024-06-27 16:41:48,699 INFO L125 PetriNetUnfolderBase]: For 1283/1307 co-relation queries the response was YES. [2024-06-27 16:41:48,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1957 conditions, 423 events. 247/423 cut-off events. For 1283/1307 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1538 event pairs, 33 based on Foata normal form. 6/426 useless extension candidates. Maximal degree in co-relation 1826. Up to 185 conditions per place. [2024-06-27 16:41:48,703 INFO L140 encePairwiseOnDemand]: 15/20 looper letters, 57 selfloop transitions, 13 changer transitions 5/78 dead transitions. [2024-06-27 16:41:48,703 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 78 transitions, 791 flow [2024-06-27 16:41:48,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 16:41:48,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 16:41:48,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 59 transitions. [2024-06-27 16:41:48,705 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.59 [2024-06-27 16:41:48,705 INFO L175 Difference]: Start difference. First operand has 50 places, 53 transitions, 485 flow. Second operand 5 states and 59 transitions. [2024-06-27 16:41:48,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 78 transitions, 791 flow [2024-06-27 16:41:48,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 78 transitions, 742 flow, removed 23 selfloop flow, removed 1 redundant places. [2024-06-27 16:41:48,711 INFO L231 Difference]: Finished difference. Result has 56 places, 56 transitions, 518 flow [2024-06-27 16:41:48,711 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=400, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=518, PETRI_PLACES=56, PETRI_TRANSITIONS=56} [2024-06-27 16:41:48,712 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 35 predicate places. [2024-06-27 16:41:48,712 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 56 transitions, 518 flow [2024-06-27 16:41:48,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 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 16:41:48,712 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:41:48,712 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:41:48,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 16:41:48,713 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:41:48,713 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:41:48,713 INFO L85 PathProgramCache]: Analyzing trace with hash 2029300336, now seen corresponding path program 2 times [2024-06-27 16:41:48,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:41:48,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223507351] [2024-06-27 16:41:48,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:41:48,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:41:48,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:41:48,939 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:41:48,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:41:48,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223507351] [2024-06-27 16:41:48,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223507351] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:41:48,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771165017] [2024-06-27 16:41:48,940 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 16:41:48,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:41:48,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:41:48,941 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 16:41:48,949 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 16:41:49,024 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 16:41:49,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:41:49,025 INFO L262 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 8 conjunts are in the unsatisfiable core [2024-06-27 16:41:49,027 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:41:49,205 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:41:49,206 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:41:49,325 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:41:49,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771165017] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:41:49,326 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:41:49,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2024-06-27 16:41:49,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244266931] [2024-06-27 16:41:49,327 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:41:49,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 16:41:49,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:41:49,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 16:41:49,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2024-06-27 16:41:49,328 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-06-27 16:41:49,328 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 56 transitions, 518 flow. Second operand has 13 states, 13 states have (on average 7.6923076923076925) internal successors, (100), 13 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:41:49,329 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:41:49,329 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-06-27 16:41:49,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:41:49,999 INFO L124 PetriNetUnfolderBase]: 729/1242 cut-off events. [2024-06-27 16:41:49,999 INFO L125 PetriNetUnfolderBase]: For 4696/4696 co-relation queries the response was YES. [2024-06-27 16:41:50,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5856 conditions, 1242 events. 729/1242 cut-off events. For 4696/4696 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 6016 event pairs, 46 based on Foata normal form. 8/1249 useless extension candidates. Maximal degree in co-relation 5138. Up to 333 conditions per place. [2024-06-27 16:41:50,012 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 146 selfloop transitions, 96 changer transitions 12/257 dead transitions. [2024-06-27 16:41:50,012 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 257 transitions, 2619 flow [2024-06-27 16:41:50,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-06-27 16:41:50,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-06-27 16:41:50,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 232 transitions. [2024-06-27 16:41:50,015 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6823529411764706 [2024-06-27 16:41:50,015 INFO L175 Difference]: Start difference. First operand has 56 places, 56 transitions, 518 flow. Second operand 17 states and 232 transitions. [2024-06-27 16:41:50,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 257 transitions, 2619 flow [2024-06-27 16:41:50,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 257 transitions, 2513 flow, removed 41 selfloop flow, removed 1 redundant places. [2024-06-27 16:41:50,035 INFO L231 Difference]: Finished difference. Result has 82 places, 147 transitions, 1757 flow [2024-06-27 16:41:50,036 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=498, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1757, PETRI_PLACES=82, PETRI_TRANSITIONS=147} [2024-06-27 16:41:50,036 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 61 predicate places. [2024-06-27 16:41:50,036 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 147 transitions, 1757 flow [2024-06-27 16:41:50,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.6923076923076925) internal successors, (100), 13 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:41:50,037 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:41:50,037 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:41:50,059 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 16:41:50,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:41:50,252 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:41:50,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:41:50,253 INFO L85 PathProgramCache]: Analyzing trace with hash -2018971582, now seen corresponding path program 3 times [2024-06-27 16:41:50,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:41:50,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219597131] [2024-06-27 16:41:50,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:41:50,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:41:50,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:41:50,480 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:41:50,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:41:50,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219597131] [2024-06-27 16:41:50,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219597131] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:41:50,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160992704] [2024-06-27 16:41:50,481 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 16:41:50,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:41:50,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:41:50,484 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 16:41:50,503 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 16:41:50,561 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-06-27 16:41:50,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:41:50,562 INFO L262 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 7 conjunts are in the unsatisfiable core [2024-06-27 16:41:50,563 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:41:50,711 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:41:50,712 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:41:50,813 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:41:50,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1160992704] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:41:50,814 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:41:50,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2024-06-27 16:41:50,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683095976] [2024-06-27 16:41:50,814 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:41:50,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 16:41:50,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:41:50,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 16:41:50,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2024-06-27 16:41:50,816 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-06-27 16:41:50,816 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 147 transitions, 1757 flow. Second operand has 13 states, 13 states have (on average 7.6923076923076925) internal successors, (100), 13 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:41:50,816 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:41:50,817 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-06-27 16:41:50,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:41:51,533 INFO L124 PetriNetUnfolderBase]: 1487/2540 cut-off events. [2024-06-27 16:41:51,533 INFO L125 PetriNetUnfolderBase]: For 13112/13112 co-relation queries the response was YES. [2024-06-27 16:41:51,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13881 conditions, 2540 events. 1487/2540 cut-off events. For 13112/13112 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 14300 event pairs, 122 based on Foata normal form. 7/2546 useless extension candidates. Maximal degree in co-relation 12010. Up to 658 conditions per place. [2024-06-27 16:41:51,631 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 189 selfloop transitions, 164 changer transitions 12/368 dead transitions. [2024-06-27 16:41:51,631 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 368 transitions, 4819 flow [2024-06-27 16:41:51,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 16:41:51,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 16:41:51,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 147 transitions. [2024-06-27 16:41:51,636 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6681818181818182 [2024-06-27 16:41:51,636 INFO L175 Difference]: Start difference. First operand has 82 places, 147 transitions, 1757 flow. Second operand 11 states and 147 transitions. [2024-06-27 16:41:51,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 368 transitions, 4819 flow [2024-06-27 16:41:51,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 368 transitions, 4462 flow, removed 175 selfloop flow, removed 2 redundant places. [2024-06-27 16:41:51,677 INFO L231 Difference]: Finished difference. Result has 95 places, 258 transitions, 3563 flow [2024-06-27 16:41:51,677 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=1570, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3563, PETRI_PLACES=95, PETRI_TRANSITIONS=258} [2024-06-27 16:41:51,679 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 74 predicate places. [2024-06-27 16:41:51,680 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 258 transitions, 3563 flow [2024-06-27 16:41:51,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.6923076923076925) internal successors, (100), 13 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:41:51,680 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:41:51,680 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:41:51,696 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 16:41:51,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:41:51,896 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:41:51,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:41:51,897 INFO L85 PathProgramCache]: Analyzing trace with hash -90873109, now seen corresponding path program 1 times [2024-06-27 16:41:51,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:41:51,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109727018] [2024-06-27 16:41:51,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:41:51,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:41:51,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:41:51,987 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:41:51,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:41:51,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109727018] [2024-06-27 16:41:51,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109727018] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:41:51,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746154148] [2024-06-27 16:41:51,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:41:51,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:41:51,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:41:51,989 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 16:41:52,013 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 16:41:52,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:41:52,046 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 5 conjunts are in the unsatisfiable core [2024-06-27 16:41:52,047 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:41:52,111 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:41:52,112 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:41:52,135 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:41:52,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746154148] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:41:52,135 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:41:52,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2024-06-27 16:41:52,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061688749] [2024-06-27 16:41:52,136 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:41:52,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 16:41:52,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:41:52,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 16:41:52,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-27 16:41:52,137 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-06-27 16:41:52,137 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 258 transitions, 3563 flow. Second operand has 10 states, 10 states have (on average 7.7) internal successors, (77), 10 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:41:52,138 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:41:52,138 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-06-27 16:41:52,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:41:52,983 INFO L124 PetriNetUnfolderBase]: 2297/4006 cut-off events. [2024-06-27 16:41:52,984 INFO L125 PetriNetUnfolderBase]: For 27522/27542 co-relation queries the response was YES. [2024-06-27 16:41:53,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23618 conditions, 4006 events. 2297/4006 cut-off events. For 27522/27542 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 25703 event pairs, 37 based on Foata normal form. 57/4061 useless extension candidates. Maximal degree in co-relation 20786. Up to 1209 conditions per place. [2024-06-27 16:41:53,027 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 407 selfloop transitions, 149 changer transitions 2/561 dead transitions. [2024-06-27 16:41:53,027 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 561 transitions, 8255 flow [2024-06-27 16:41:53,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 16:41:53,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 16:41:53,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 142 transitions. [2024-06-27 16:41:53,028 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5916666666666667 [2024-06-27 16:41:53,029 INFO L175 Difference]: Start difference. First operand has 95 places, 258 transitions, 3563 flow. Second operand 12 states and 142 transitions. [2024-06-27 16:41:53,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 561 transitions, 8255 flow [2024-06-27 16:41:53,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 561 transitions, 8087 flow, removed 55 selfloop flow, removed 7 redundant places. [2024-06-27 16:41:53,112 INFO L231 Difference]: Finished difference. Result has 107 places, 354 transitions, 5545 flow [2024-06-27 16:41:53,112 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=3466, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5545, PETRI_PLACES=107, PETRI_TRANSITIONS=354} [2024-06-27 16:41:53,113 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 86 predicate places. [2024-06-27 16:41:53,113 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 354 transitions, 5545 flow [2024-06-27 16:41:53,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.7) internal successors, (77), 10 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:41:53,114 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:41:53,114 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:41:53,135 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-06-27 16:41:53,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:41:53,336 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:41:53,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:41:53,336 INFO L85 PathProgramCache]: Analyzing trace with hash -217573595, now seen corresponding path program 2 times [2024-06-27 16:41:53,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:41:53,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037318595] [2024-06-27 16:41:53,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:41:53,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:41:53,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:41:53,398 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:41:53,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:41:53,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037318595] [2024-06-27 16:41:53,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037318595] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:41:53,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511866041] [2024-06-27 16:41:53,399 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 16:41:53,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:41:53,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:41:53,401 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 16:41:53,420 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 16:41:53,459 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 16:41:53,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:41:53,460 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 5 conjunts are in the unsatisfiable core [2024-06-27 16:41:53,461 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:41:53,592 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:41:53,596 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:41:53,623 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:41:53,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511866041] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:41:53,623 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:41:53,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 4] total 8 [2024-06-27 16:41:53,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291762806] [2024-06-27 16:41:53,624 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:41:53,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 16:41:53,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:41:53,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 16:41:53,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 16:41:53,625 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-06-27 16:41:53,626 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 354 transitions, 5545 flow. Second operand has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 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 16:41:53,626 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:41:53,626 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-06-27 16:41:53,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:41:54,725 INFO L124 PetriNetUnfolderBase]: 2687/4849 cut-off events. [2024-06-27 16:41:54,725 INFO L125 PetriNetUnfolderBase]: For 42268/42268 co-relation queries the response was YES. [2024-06-27 16:41:54,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31857 conditions, 4849 events. 2687/4849 cut-off events. For 42268/42268 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 33577 event pairs, 186 based on Foata normal form. 36/4884 useless extension candidates. Maximal degree in co-relation 31465. Up to 1629 conditions per place. [2024-06-27 16:41:54,781 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 345 selfloop transitions, 300 changer transitions 0/648 dead transitions. [2024-06-27 16:41:54,782 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 648 transitions, 10824 flow [2024-06-27 16:41:54,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-27 16:41:54,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-27 16:41:54,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 162 transitions. [2024-06-27 16:41:54,783 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5785714285714286 [2024-06-27 16:41:54,783 INFO L175 Difference]: Start difference. First operand has 107 places, 354 transitions, 5545 flow. Second operand 14 states and 162 transitions. [2024-06-27 16:41:54,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 648 transitions, 10824 flow [2024-06-27 16:41:54,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 648 transitions, 10391 flow, removed 209 selfloop flow, removed 2 redundant places. [2024-06-27 16:41:54,979 INFO L231 Difference]: Finished difference. Result has 124 places, 474 transitions, 8098 flow [2024-06-27 16:41:54,980 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=5198, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=354, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=186, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=8098, PETRI_PLACES=124, PETRI_TRANSITIONS=474} [2024-06-27 16:41:54,980 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 103 predicate places. [2024-06-27 16:41:54,980 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 474 transitions, 8098 flow [2024-06-27 16:41:54,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 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 16:41:54,981 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:41:54,981 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:41:54,996 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-06-27 16:41:55,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:41:55,196 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:41:55,197 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:41:55,197 INFO L85 PathProgramCache]: Analyzing trace with hash 1366077662, now seen corresponding path program 3 times [2024-06-27 16:41:55,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:41:55,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68642105] [2024-06-27 16:41:55,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:41:55,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:41:55,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:41:55,491 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:41:55,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:41:55,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68642105] [2024-06-27 16:41:55,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68642105] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:41:55,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514826714] [2024-06-27 16:41:55,492 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 16:41:55,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:41:55,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:41:55,493 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 16:41:55,510 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 16:41:55,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-06-27 16:41:55,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:41:55,781 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 16 conjunts are in the unsatisfiable core [2024-06-27 16:41:55,782 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:41:57,154 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:41:57,154 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:41:57,562 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:41:57,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [514826714] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:41:57,562 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:41:57,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 5] total 16 [2024-06-27 16:41:57,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58830336] [2024-06-27 16:41:57,562 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:41:57,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-06-27 16:41:57,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:41:57,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-06-27 16:41:57,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2024-06-27 16:41:57,564 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-06-27 16:41:57,564 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 474 transitions, 8098 flow. Second operand has 17 states, 17 states have (on average 7.470588235294118) internal successors, (127), 17 states have internal predecessors, (127), 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 16:41:57,564 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:41:57,564 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-06-27 16:41:57,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:42:00,044 INFO L124 PetriNetUnfolderBase]: 4077/7426 cut-off events. [2024-06-27 16:42:00,044 INFO L125 PetriNetUnfolderBase]: For 80964/80964 co-relation queries the response was YES. [2024-06-27 16:42:00,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51983 conditions, 7426 events. 4077/7426 cut-off events. For 80964/80964 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 53763 event pairs, 322 based on Foata normal form. 37/7462 useless extension candidates. Maximal degree in co-relation 51256. Up to 4470 conditions per place. [2024-06-27 16:42:00,174 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 624 selfloop transitions, 283 changer transitions 25/935 dead transitions. [2024-06-27 16:42:00,174 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 935 transitions, 17152 flow [2024-06-27 16:42:00,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-06-27 16:42:00,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-06-27 16:42:00,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 245 transitions. [2024-06-27 16:42:00,177 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6447368421052632 [2024-06-27 16:42:00,177 INFO L175 Difference]: Start difference. First operand has 124 places, 474 transitions, 8098 flow. Second operand 19 states and 245 transitions. [2024-06-27 16:42:00,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 935 transitions, 17152 flow [2024-06-27 16:42:00,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 935 transitions, 16802 flow, removed 169 selfloop flow, removed 2 redundant places. [2024-06-27 16:42:00,618 INFO L231 Difference]: Finished difference. Result has 150 places, 689 transitions, 12899 flow [2024-06-27 16:42:00,619 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=7912, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=474, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=12899, PETRI_PLACES=150, PETRI_TRANSITIONS=689} [2024-06-27 16:42:00,619 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 129 predicate places. [2024-06-27 16:42:00,619 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 689 transitions, 12899 flow [2024-06-27 16:42:00,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 7.470588235294118) internal successors, (127), 17 states have internal predecessors, (127), 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 16:42:00,620 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:42:00,620 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:42:00,632 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-06-27 16:42:00,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:42:00,824 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:42:00,824 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:42:00,825 INFO L85 PathProgramCache]: Analyzing trace with hash 2081178062, now seen corresponding path program 4 times [2024-06-27 16:42:00,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:42:00,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208073541] [2024-06-27 16:42:00,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:42:00,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:42:00,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:42:01,129 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:42:01,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:42:01,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208073541] [2024-06-27 16:42:01,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208073541] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:42:01,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694973861] [2024-06-27 16:42:01,130 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 16:42:01,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:42:01,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:42:01,132 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 16:42:01,159 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 16:42:01,357 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 16:42:01,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:42:01,358 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 16 conjunts are in the unsatisfiable core [2024-06-27 16:42:01,360 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:42:05,649 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:42:05,649 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:42:06,110 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:42:06,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694973861] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:42:06,111 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:42:06,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 5] total 16 [2024-06-27 16:42:06,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775918559] [2024-06-27 16:42:06,111 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:42:06,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-06-27 16:42:06,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:42:06,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-06-27 16:42:06,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=209, Unknown=1, NotChecked=0, Total=272 [2024-06-27 16:42:06,113 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-06-27 16:42:06,113 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 689 transitions, 12899 flow. Second operand has 17 states, 17 states have (on average 7.411764705882353) internal successors, (126), 17 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:42:06,113 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:42:06,113 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-06-27 16:42:06,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:42:14,735 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-06-27 16:42:19,127 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-06-27 16:42:23,192 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-06-27 16:42:27,200 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-06-27 16:42:31,696 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-06-27 16:42:36,329 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-06-27 16:42:38,687 INFO L124 PetriNetUnfolderBase]: 5388/9853 cut-off events. [2024-06-27 16:42:38,688 INFO L125 PetriNetUnfolderBase]: For 135447/135447 co-relation queries the response was YES. [2024-06-27 16:42:38,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74224 conditions, 9853 events. 5388/9853 cut-off events. For 135447/135447 co-relation queries the response was YES. Maximal size of possible extension queue 618. Compared 75674 event pairs, 454 based on Foata normal form. 18/9870 useless extension candidates. Maximal degree in co-relation 73245. Up to 7061 conditions per place. [2024-06-27 16:42:38,766 INFO L140 encePairwiseOnDemand]: 13/20 looper letters, 797 selfloop transitions, 343 changer transitions 21/1164 dead transitions. [2024-06-27 16:42:38,767 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 1164 transitions, 23279 flow [2024-06-27 16:42:38,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-06-27 16:42:38,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-06-27 16:42:38,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 316 transitions. [2024-06-27 16:42:38,768 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6869565217391305 [2024-06-27 16:42:38,769 INFO L175 Difference]: Start difference. First operand has 150 places, 689 transitions, 12899 flow. Second operand 23 states and 316 transitions. [2024-06-27 16:42:38,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 1164 transitions, 23279 flow [2024-06-27 16:42:39,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 1164 transitions, 22401 flow, removed 413 selfloop flow, removed 7 redundant places. [2024-06-27 16:42:39,516 INFO L231 Difference]: Finished difference. Result has 177 places, 955 transitions, 19252 flow [2024-06-27 16:42:39,516 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=12345, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=689, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=431, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=19252, PETRI_PLACES=177, PETRI_TRANSITIONS=955} [2024-06-27 16:42:39,517 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 156 predicate places. [2024-06-27 16:42:39,517 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 955 transitions, 19252 flow [2024-06-27 16:42:39,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 7.411764705882353) internal successors, (126), 17 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:42:39,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:42:39,517 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:42:39,528 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 16:42:39,718 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,SelfDestructingSolverStorable11 [2024-06-27 16:42:39,718 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:42:39,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:42:39,719 INFO L85 PathProgramCache]: Analyzing trace with hash -140309619, now seen corresponding path program 5 times [2024-06-27 16:42:39,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:42:39,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979692838] [2024-06-27 16:42:39,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:42:39,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:42:39,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:42:39,770 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 16:42:39,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:42:39,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979692838] [2024-06-27 16:42:39,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979692838] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:42:39,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266668681] [2024-06-27 16:42:39,771 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-27 16:42:39,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:42:39,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:42:39,772 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 16:42:39,788 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 16:42:39,837 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-06-27 16:42:39,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:42:39,838 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 5 conjunts are in the unsatisfiable core [2024-06-27 16:42:39,840 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:42:39,930 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:42:39,930 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:42:39,958 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 16:42:39,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266668681] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:42:39,959 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:42:39,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2024-06-27 16:42:39,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076470483] [2024-06-27 16:42:39,959 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:42:39,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 16:42:39,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:42:39,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 16:42:39,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-27 16:42:39,961 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-06-27 16:42:39,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 955 transitions, 19252 flow. Second operand has 10 states, 10 states have (on average 7.7) internal successors, (77), 10 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:42:39,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:42:39,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-06-27 16:42:39,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:42:43,321 INFO L124 PetriNetUnfolderBase]: 6584/11874 cut-off events. [2024-06-27 16:42:43,321 INFO L125 PetriNetUnfolderBase]: For 190975/190975 co-relation queries the response was YES. [2024-06-27 16:42:43,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94717 conditions, 11874 events. 6584/11874 cut-off events. For 190975/190975 co-relation queries the response was YES. Maximal size of possible extension queue 771. Compared 93516 event pairs, 437 based on Foata normal form. 142/12015 useless extension candidates. Maximal degree in co-relation 91752. Up to 5084 conditions per place. [2024-06-27 16:42:43,433 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 861 selfloop transitions, 682 changer transitions 0/1546 dead transitions. [2024-06-27 16:42:43,433 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 1546 transitions, 32835 flow [2024-06-27 16:42:43,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-27 16:42:43,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-27 16:42:43,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 163 transitions. [2024-06-27 16:42:43,435 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5821428571428572 [2024-06-27 16:42:43,435 INFO L175 Difference]: Start difference. First operand has 177 places, 955 transitions, 19252 flow. Second operand 14 states and 163 transitions. [2024-06-27 16:42:43,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 1546 transitions, 32835 flow [2024-06-27 16:42:44,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 1546 transitions, 31522 flow, removed 625 selfloop flow, removed 9 redundant places. [2024-06-27 16:42:44,968 INFO L231 Difference]: Finished difference. Result has 189 places, 1204 transitions, 26072 flow [2024-06-27 16:42:44,969 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=18286, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=955, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=455, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=420, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=26072, PETRI_PLACES=189, PETRI_TRANSITIONS=1204} [2024-06-27 16:42:44,969 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 168 predicate places. [2024-06-27 16:42:44,970 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 1204 transitions, 26072 flow [2024-06-27 16:42:44,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.7) internal successors, (77), 10 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:42:44,971 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:42:44,971 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:42:44,981 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-06-27 16:42:45,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-06-27 16:42:45,172 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:42:45,172 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:42:45,172 INFO L85 PathProgramCache]: Analyzing trace with hash 291719988, now seen corresponding path program 6 times [2024-06-27 16:42:45,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:42:45,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900922964] [2024-06-27 16:42:45,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:42:45,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:42:45,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:42:45,587 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:42:45,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:42:45,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900922964] [2024-06-27 16:42:45,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900922964] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:42:45,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046646714] [2024-06-27 16:42:45,588 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-27 16:42:45,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:42:45,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:42:45,593 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 16:42:45,600 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 16:42:45,826 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-06-27 16:42:45,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:42:45,827 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 16 conjunts are in the unsatisfiable core [2024-06-27 16:42:45,829 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:42:46,165 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:42:46,165 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:42:46,411 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:42:46,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046646714] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:42:46,411 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:42:46,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 5] total 16 [2024-06-27 16:42:46,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145016532] [2024-06-27 16:42:46,411 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:42:46,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-06-27 16:42:46,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:42:46,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-06-27 16:42:46,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2024-06-27 16:42:46,413 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-06-27 16:42:46,413 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 1204 transitions, 26072 flow. Second operand has 17 states, 17 states have (on average 7.411764705882353) internal successors, (126), 17 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:42:46,413 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:42:46,413 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-06-27 16:42:46,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:42:52,845 INFO L124 PetriNetUnfolderBase]: 7511/13504 cut-off events. [2024-06-27 16:42:52,845 INFO L125 PetriNetUnfolderBase]: For 296268/296268 co-relation queries the response was YES. [2024-06-27 16:42:53,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119585 conditions, 13504 events. 7511/13504 cut-off events. For 296268/296268 co-relation queries the response was YES. Maximal size of possible extension queue 914. Compared 108177 event pairs, 490 based on Foata normal form. 22/13525 useless extension candidates. Maximal degree in co-relation 116035. Up to 6484 conditions per place. [2024-06-27 16:42:53,063 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 592 selfloop transitions, 1048 changer transitions 15/1658 dead transitions. [2024-06-27 16:42:53,063 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 1658 transitions, 39074 flow [2024-06-27 16:42:53,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-06-27 16:42:53,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-06-27 16:42:53,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 285 transitions. [2024-06-27 16:42:53,065 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.59375 [2024-06-27 16:42:53,065 INFO L175 Difference]: Start difference. First operand has 189 places, 1204 transitions, 26072 flow. Second operand 24 states and 285 transitions. [2024-06-27 16:42:53,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 1658 transitions, 39074 flow [2024-06-27 16:42:55,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 1658 transitions, 38476 flow, removed 281 selfloop flow, removed 3 redundant places. [2024-06-27 16:42:55,337 INFO L231 Difference]: Finished difference. Result has 218 places, 1526 transitions, 38116 flow [2024-06-27 16:42:55,338 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=24350, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=709, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=307, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=38116, PETRI_PLACES=218, PETRI_TRANSITIONS=1526} [2024-06-27 16:42:55,338 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 197 predicate places. [2024-06-27 16:42:55,338 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 1526 transitions, 38116 flow [2024-06-27 16:42:55,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 7.411764705882353) internal successors, (126), 17 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:42:55,339 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:42:55,339 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:42:55,350 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-06-27 16:42:55,539 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,SelfDestructingSolverStorable13 [2024-06-27 16:42:55,540 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:42:55,540 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:42:55,540 INFO L85 PathProgramCache]: Analyzing trace with hash 759064235, now seen corresponding path program 7 times [2024-06-27 16:42:55,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:42:55,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775053659] [2024-06-27 16:42:55,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:42:55,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:42:55,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:42:55,599 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:42:55,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:42:55,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775053659] [2024-06-27 16:42:55,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775053659] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:42:55,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082845026] [2024-06-27 16:42:55,599 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-06-27 16:42:55,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:42:55,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:42:55,604 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 16:42:55,609 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 16:42:55,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:42:55,653 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 5 conjunts are in the unsatisfiable core [2024-06-27 16:42:55,653 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:42:55,728 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 16:42:55,728 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:42:55,753 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:42:55,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1082845026] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:42:55,753 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:42:55,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 4] total 8 [2024-06-27 16:42:55,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579040180] [2024-06-27 16:42:55,754 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:42:55,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 16:42:55,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:42:55,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 16:42:55,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 16:42:55,755 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-06-27 16:42:55,755 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 1526 transitions, 38116 flow. Second operand has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 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 16:42:55,755 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:42:55,755 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-06-27 16:42:55,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:43:01,889 INFO L124 PetriNetUnfolderBase]: 8085/14506 cut-off events. [2024-06-27 16:43:01,889 INFO L125 PetriNetUnfolderBase]: For 361771/361783 co-relation queries the response was YES. [2024-06-27 16:43:01,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 137618 conditions, 14506 events. 8085/14506 cut-off events. For 361771/361783 co-relation queries the response was YES. Maximal size of possible extension queue 1025. Compared 117837 event pairs, 57 based on Foata normal form. 71/14575 useless extension candidates. Maximal degree in co-relation 133511. Up to 4447 conditions per place. [2024-06-27 16:43:02,020 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 1435 selfloop transitions, 649 changer transitions 0/2087 dead transitions. [2024-06-27 16:43:02,021 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 2087 transitions, 52040 flow [2024-06-27 16:43:02,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-27 16:43:02,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-27 16:43:02,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 167 transitions. [2024-06-27 16:43:02,022 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5566666666666666 [2024-06-27 16:43:02,022 INFO L175 Difference]: Start difference. First operand has 218 places, 1526 transitions, 38116 flow. Second operand 15 states and 167 transitions. [2024-06-27 16:43:02,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 2087 transitions, 52040 flow [2024-06-27 16:43:05,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 2087 transitions, 49699 flow, removed 1156 selfloop flow, removed 7 redundant places. [2024-06-27 16:43:05,570 INFO L231 Difference]: Finished difference. Result has 229 places, 1639 transitions, 41225 flow [2024-06-27 16:43:05,572 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=35932, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1509, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=534, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=965, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=41225, PETRI_PLACES=229, PETRI_TRANSITIONS=1639} [2024-06-27 16:43:05,573 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 208 predicate places. [2024-06-27 16:43:05,573 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 1639 transitions, 41225 flow [2024-06-27 16:43:05,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 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 16:43:05,574 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:43:05,574 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:43:05,588 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 16:43:05,788 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,SelfDestructingSolverStorable14 [2024-06-27 16:43:05,789 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:43:05,789 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:43:05,789 INFO L85 PathProgramCache]: Analyzing trace with hash 1338616304, now seen corresponding path program 8 times [2024-06-27 16:43:05,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:43:05,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289277846] [2024-06-27 16:43:05,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:43:05,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:43:05,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:43:06,113 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:43:06,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:43:06,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289277846] [2024-06-27 16:43:06,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289277846] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:43:06,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766596461] [2024-06-27 16:43:06,114 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 16:43:06,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:43:06,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:43:06,116 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 16:43:06,132 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 16:43:06,238 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 16:43:06,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:43:06,239 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 15 conjunts are in the unsatisfiable core [2024-06-27 16:43:06,240 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:43:06,556 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:43:06,556 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:43:06,769 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:43:06,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766596461] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:43:06,770 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:43:06,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 17 [2024-06-27 16:43:06,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222724331] [2024-06-27 16:43:06,770 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:43:06,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-06-27 16:43:06,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:43:06,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-06-27 16:43:06,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2024-06-27 16:43:06,771 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-06-27 16:43:06,772 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 1639 transitions, 41225 flow. Second operand has 18 states, 18 states have (on average 7.277777777777778) internal successors, (131), 18 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:43:06,772 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:43:06,772 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-06-27 16:43:06,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:43:16,348 INFO L124 PetriNetUnfolderBase]: 9935/17761 cut-off events. [2024-06-27 16:43:16,348 INFO L125 PetriNetUnfolderBase]: For 490320/490320 co-relation queries the response was YES. [2024-06-27 16:43:16,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 175131 conditions, 17761 events. 9935/17761 cut-off events. For 490320/490320 co-relation queries the response was YES. Maximal size of possible extension queue 1317. Compared 148710 event pairs, 648 based on Foata normal form. 41/17801 useless extension candidates. Maximal degree in co-relation 170112. Up to 7874 conditions per place. [2024-06-27 16:43:16,535 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 742 selfloop transitions, 1598 changer transitions 29/2372 dead transitions. [2024-06-27 16:43:16,536 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 2372 transitions, 64193 flow [2024-06-27 16:43:16,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-06-27 16:43:16,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-06-27 16:43:16,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 304 transitions. [2024-06-27 16:43:16,537 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5846153846153846 [2024-06-27 16:43:16,537 INFO L175 Difference]: Start difference. First operand has 229 places, 1639 transitions, 41225 flow. Second operand 26 states and 304 transitions. [2024-06-27 16:43:16,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 2372 transitions, 64193 flow [2024-06-27 16:43:22,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 2372 transitions, 63070 flow, removed 148 selfloop flow, removed 4 redundant places. [2024-06-27 16:43:22,193 INFO L231 Difference]: Finished difference. Result has 263 places, 2187 transitions, 62321 flow [2024-06-27 16:43:22,194 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=40627, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1639, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1095, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=424, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=62321, PETRI_PLACES=263, PETRI_TRANSITIONS=2187} [2024-06-27 16:43:22,195 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 242 predicate places. [2024-06-27 16:43:22,195 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 2187 transitions, 62321 flow [2024-06-27 16:43:22,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 7.277777777777778) internal successors, (131), 18 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:43:22,195 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:43:22,196 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:43:22,211 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-06-27 16:43:22,410 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,SelfDestructingSolverStorable15 [2024-06-27 16:43:22,411 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:43:22,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:43:22,411 INFO L85 PathProgramCache]: Analyzing trace with hash -1075935858, now seen corresponding path program 9 times [2024-06-27 16:43:22,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:43:22,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657113890] [2024-06-27 16:43:22,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:43:22,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:43:22,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:43:22,750 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:43:22,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:43:22,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657113890] [2024-06-27 16:43:22,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657113890] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:43:22,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858891963] [2024-06-27 16:43:22,750 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 16:43:22,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:43:22,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:43:22,751 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 16:43:22,752 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 16:43:22,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-06-27 16:43:22,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:43:22,873 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 15 conjunts are in the unsatisfiable core [2024-06-27 16:43:22,874 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:43:23,205 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:43:23,206 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:43:23,420 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:43:23,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858891963] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:43:23,421 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:43:23,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 17 [2024-06-27 16:43:23,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060415768] [2024-06-27 16:43:23,421 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:43:23,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-06-27 16:43:23,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:43:23,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-06-27 16:43:23,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2024-06-27 16:43:23,422 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-06-27 16:43:23,422 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 2187 transitions, 62321 flow. Second operand has 18 states, 18 states have (on average 7.277777777777778) internal successors, (131), 18 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:43:23,423 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:43:23,423 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-06-27 16:43:23,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:43:36,897 INFO L124 PetriNetUnfolderBase]: 11742/20920 cut-off events. [2024-06-27 16:43:36,897 INFO L125 PetriNetUnfolderBase]: For 647048/647060 co-relation queries the response was YES. [2024-06-27 16:43:37,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 221184 conditions, 20920 events. 11742/20920 cut-off events. For 647048/647060 co-relation queries the response was YES. Maximal size of possible extension queue 1543. Compared 179485 event pairs, 874 based on Foata normal form. 25/20943 useless extension candidates. Maximal degree in co-relation 214940. Up to 10347 conditions per place. [2024-06-27 16:43:37,137 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 899 selfloop transitions, 1998 changer transitions 37/2937 dead transitions. [2024-06-27 16:43:37,138 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 2937 transitions, 89632 flow [2024-06-27 16:43:37,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-06-27 16:43:37,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-06-27 16:43:37,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 306 transitions. [2024-06-27 16:43:37,140 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5666666666666667 [2024-06-27 16:43:37,140 INFO L175 Difference]: Start difference. First operand has 263 places, 2187 transitions, 62321 flow. Second operand 27 states and 306 transitions. [2024-06-27 16:43:37,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 2937 transitions, 89632 flow [2024-06-27 16:43:46,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 2937 transitions, 84738 flow, removed 2345 selfloop flow, removed 7 redundant places. [2024-06-27 16:43:46,820 INFO L231 Difference]: Finished difference. Result has 296 places, 2748 transitions, 82839 flow [2024-06-27 16:43:46,822 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=59335, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1479, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=644, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=82839, PETRI_PLACES=296, PETRI_TRANSITIONS=2748} [2024-06-27 16:43:46,822 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 275 predicate places. [2024-06-27 16:43:46,822 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 2748 transitions, 82839 flow [2024-06-27 16:43:46,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 7.277777777777778) internal successors, (131), 18 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:43:46,823 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:43:46,823 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:43:46,835 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 16:43:47,028 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,SelfDestructingSolverStorable16 [2024-06-27 16:43:47,028 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:43:47,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:43:47,029 INFO L85 PathProgramCache]: Analyzing trace with hash 245760789, now seen corresponding path program 10 times [2024-06-27 16:43:47,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:43:47,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915668732] [2024-06-27 16:43:47,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:43:47,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:43:47,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:43:47,082 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:43:47,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:43:47,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915668732] [2024-06-27 16:43:47,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915668732] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:43:47,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592139706] [2024-06-27 16:43:47,083 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 16:43:47,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:43:47,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:43:47,084 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 16:43:47,086 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 16:43:47,152 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 16:43:47,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:43:47,153 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 5 conjunts are in the unsatisfiable core [2024-06-27 16:43:47,154 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:43:47,238 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:43:47,238 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:43:47,271 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:43:47,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1592139706] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:43:47,272 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:43:47,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2024-06-27 16:43:47,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261166623] [2024-06-27 16:43:47,272 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:43:47,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 16:43:47,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:43:47,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 16:43:47,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-27 16:43:47,273 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-06-27 16:43:47,273 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 2748 transitions, 82839 flow. Second operand has 10 states, 10 states have (on average 8.2) internal successors, (82), 10 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:43:47,273 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:43:47,273 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-06-27 16:43:47,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:44:02,176 INFO L124 PetriNetUnfolderBase]: 12648/22144 cut-off events. [2024-06-27 16:44:02,176 INFO L125 PetriNetUnfolderBase]: For 793082/793082 co-relation queries the response was YES. [2024-06-27 16:44:02,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 244786 conditions, 22144 events. 12648/22144 cut-off events. For 793082/793082 co-relation queries the response was YES. Maximal size of possible extension queue 1555. Compared 187535 event pairs, 721 based on Foata normal form. 2329/24472 useless extension candidates. Maximal degree in co-relation 237442. Up to 13507 conditions per place. [2024-06-27 16:44:02,557 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 2419 selfloop transitions, 1266 changer transitions 0/3688 dead transitions. [2024-06-27 16:44:02,557 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 3688 transitions, 113205 flow [2024-06-27 16:44:02,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 16:44:02,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 16:44:02,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 158 transitions. [2024-06-27 16:44:02,558 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6076923076923076 [2024-06-27 16:44:02,559 INFO L175 Difference]: Start difference. First operand has 296 places, 2748 transitions, 82839 flow. Second operand 13 states and 158 transitions. [2024-06-27 16:44:02,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 3688 transitions, 113205 flow