./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/unroll-cond-2.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/unroll-cond-2.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 4f5c6e2b4939ff0e3b5a44ab7f8c3e5d18f7e9fd12beb8fad487ea501e8fa48b --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 17:10:10,335 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 17:10:10,410 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 17:10:10,415 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 17:10:10,415 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 17:10:10,439 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 17:10:10,442 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 17:10:10,442 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 17:10:10,443 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 17:10:10,446 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 17:10:10,446 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 17:10:10,446 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 17:10:10,447 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 17:10:10,448 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 17:10:10,448 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 17:10:10,448 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 17:10:10,448 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 17:10:10,448 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 17:10:10,449 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 17:10:10,449 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 17:10:10,449 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 17:10:10,449 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 17:10:10,450 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 17:10:10,450 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 17:10:10,450 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 17:10:10,450 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 17:10:10,450 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 17:10:10,451 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 17:10:10,451 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 17:10:10,451 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 17:10:10,452 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 17:10:10,452 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 17:10:10,452 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 17:10:10,453 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 17:10:10,453 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 17:10:10,453 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 17:10:10,453 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 17:10:10,453 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 17:10:10,453 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 17:10:10,453 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 17:10:10,454 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 17:10:10,454 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 17:10:10,454 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 17:10:10,454 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4f5c6e2b4939ff0e3b5a44ab7f8c3e5d18f7e9fd12beb8fad487ea501e8fa48b [2024-06-27 17:10:10,668 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 17:10:10,690 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 17:10:10,692 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 17:10:10,693 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 17:10:10,693 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 17:10:10,694 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/unroll-cond-2.wvr.c [2024-06-27 17:10:11,658 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 17:10:11,848 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 17:10:11,849 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/unroll-cond-2.wvr.c [2024-06-27 17:10:11,854 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/536dd0667/ad01093de6fc4ac8bab6333fe68fb4a3/FLAGebb3fe0a2 [2024-06-27 17:10:11,864 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/536dd0667/ad01093de6fc4ac8bab6333fe68fb4a3 [2024-06-27 17:10:11,866 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 17:10:11,867 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-06-27 17:10:11,867 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 17:10:11,867 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 17:10:11,872 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 17:10:11,873 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 05:10:11" (1/1) ... [2024-06-27 17:10:11,873 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b0d74f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:10:11, skipping insertion in model container [2024-06-27 17:10:11,873 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 05:10:11" (1/1) ... [2024-06-27 17:10:11,889 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 17:10:12,063 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/unroll-cond-2.wvr.c[2500,2513] [2024-06-27 17:10:12,085 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 17:10:12,093 INFO L202 MainTranslator]: Completed pre-run [2024-06-27 17:10:12,132 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/unroll-cond-2.wvr.c[2500,2513] [2024-06-27 17:10:12,136 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 17:10:12,155 INFO L206 MainTranslator]: Completed translation [2024-06-27 17:10:12,155 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:10:12 WrapperNode [2024-06-27 17:10:12,155 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 17:10:12,156 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 17:10:12,156 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 17:10:12,156 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 17:10:12,161 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:10:12" (1/1) ... [2024-06-27 17:10:12,166 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:10:12" (1/1) ... [2024-06-27 17:10:12,189 INFO L138 Inliner]: procedures = 23, calls = 23, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 134 [2024-06-27 17:10:12,190 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 17:10:12,190 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 17:10:12,190 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 17:10:12,190 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 17:10:12,198 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:10:12" (1/1) ... [2024-06-27 17:10:12,199 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:10:12" (1/1) ... [2024-06-27 17:10:12,201 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:10:12" (1/1) ... [2024-06-27 17:10:12,211 INFO L175 MemorySlicer]: Split 7 memory accesses to 2 slices as follows [2, 5]. 71 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-06-27 17:10:12,211 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:10:12" (1/1) ... [2024-06-27 17:10:12,212 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:10:12" (1/1) ... [2024-06-27 17:10:12,219 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:10:12" (1/1) ... [2024-06-27 17:10:12,221 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:10:12" (1/1) ... [2024-06-27 17:10:12,222 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:10:12" (1/1) ... [2024-06-27 17:10:12,223 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:10:12" (1/1) ... [2024-06-27 17:10:12,225 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 17:10:12,225 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 17:10:12,225 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 17:10:12,226 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 17:10:12,226 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:10:12" (1/1) ... [2024-06-27 17:10:12,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 17:10:12,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:10:12,277 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 17:10:12,300 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 17:10:12,317 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 17:10:12,317 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-06-27 17:10:12,317 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-06-27 17:10:12,318 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-06-27 17:10:12,318 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-06-27 17:10:12,318 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 17:10:12,318 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-27 17:10:12,319 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-27 17:10:12,319 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-27 17:10:12,319 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-06-27 17:10:12,320 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 17:10:12,320 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 17:10:12,320 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-27 17:10:12,320 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-27 17:10:12,321 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 17:10:12,419 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 17:10:12,420 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 17:10:12,701 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 17:10:12,701 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 17:10:12,861 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 17:10:12,862 INFO L320 CfgBuilder]: Removed 3 assume(true) statements. [2024-06-27 17:10:12,862 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 05:10:12 BoogieIcfgContainer [2024-06-27 17:10:12,862 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 17:10:12,864 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 17:10:12,864 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 17:10:12,866 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 17:10:12,866 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 05:10:11" (1/3) ... [2024-06-27 17:10:12,867 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30dd8e6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 05:10:12, skipping insertion in model container [2024-06-27 17:10:12,867 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:10:12" (2/3) ... [2024-06-27 17:10:12,867 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30dd8e6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 05:10:12, skipping insertion in model container [2024-06-27 17:10:12,867 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 05:10:12" (3/3) ... [2024-06-27 17:10:12,868 INFO L112 eAbstractionObserver]: Analyzing ICFG unroll-cond-2.wvr.c [2024-06-27 17:10:12,874 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2024-06-27 17:10:12,881 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 17:10:12,881 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-06-27 17:10:12,881 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 17:10:12,920 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-06-27 17:10:12,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 24 places, 20 transitions, 54 flow [2024-06-27 17:10:12,968 INFO L124 PetriNetUnfolderBase]: 3/18 cut-off events. [2024-06-27 17:10:12,969 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-06-27 17:10:12,970 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 2. Compared 10 event pairs, 0 based on Foata normal form. 0/14 useless extension candidates. Maximal degree in co-relation 11. Up to 2 conditions per place. [2024-06-27 17:10:12,970 INFO L82 GeneralOperation]: Start removeDead. Operand has 24 places, 20 transitions, 54 flow [2024-06-27 17:10:12,972 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 21 places, 17 transitions, 46 flow [2024-06-27 17:10:12,979 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 17:10:12,984 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;@7e0496e9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 17:10:12,984 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-06-27 17:10:12,993 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 17:10:12,994 INFO L124 PetriNetUnfolderBase]: 3/16 cut-off events. [2024-06-27 17:10:12,994 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-06-27 17:10:12,994 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:10:12,995 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:10:12,995 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 17:10:12,999 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:10:12,999 INFO L85 PathProgramCache]: Analyzing trace with hash 1382470306, now seen corresponding path program 1 times [2024-06-27 17:10:13,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:10:13,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075439613] [2024-06-27 17:10:13,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:10:13,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:10:13,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:10:13,311 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 17:10:13,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:10:13,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075439613] [2024-06-27 17:10:13,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075439613] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:10:13,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:10:13,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 17:10:13,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857650840] [2024-06-27 17:10:13,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:10:13,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 17:10:13,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:10:13,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 17:10:13,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 17:10:13,375 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-06-27 17:10:13,377 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 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 17:10:13,377 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:10:13,377 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-06-27 17:10:13,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:10:13,477 INFO L124 PetriNetUnfolderBase]: 38/71 cut-off events. [2024-06-27 17:10:13,478 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2024-06-27 17:10:13,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 157 conditions, 71 events. 38/71 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 118 event pairs, 22 based on Foata normal form. 0/55 useless extension candidates. Maximal degree in co-relation 120. Up to 70 conditions per place. [2024-06-27 17:10:13,480 INFO L140 encePairwiseOnDemand]: 17/20 looper letters, 15 selfloop transitions, 2 changer transitions 0/18 dead transitions. [2024-06-27 17:10:13,480 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 18 transitions, 82 flow [2024-06-27 17:10:13,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 17:10:13,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 17:10:13,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 27 transitions. [2024-06-27 17:10:13,491 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-27 17:10:13,493 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 46 flow. Second operand 3 states and 27 transitions. [2024-06-27 17:10:13,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 18 transitions, 82 flow [2024-06-27 17:10:13,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 18 transitions, 74 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-27 17:10:13,496 INFO L231 Difference]: Finished difference. Result has 20 places, 18 transitions, 50 flow [2024-06-27 17:10:13,497 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=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=50, PETRI_PLACES=20, PETRI_TRANSITIONS=18} [2024-06-27 17:10:13,500 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, -1 predicate places. [2024-06-27 17:10:13,500 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 18 transitions, 50 flow [2024-06-27 17:10:13,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 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 17:10:13,501 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:10:13,501 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:10:13,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 17:10:13,501 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 17:10:13,502 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:10:13,502 INFO L85 PathProgramCache]: Analyzing trace with hash 1898578683, now seen corresponding path program 1 times [2024-06-27 17:10:13,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:10:13,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170204176] [2024-06-27 17:10:13,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:10:13,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:10:13,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:10:13,741 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 17:10:13,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:10:13,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170204176] [2024-06-27 17:10:13,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170204176] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:10:13,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:10:13,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:10:13,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629795142] [2024-06-27 17:10:13,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:10:13,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:10:13,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:10:13,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:10:13,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:10:13,747 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-06-27 17:10:13,748 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 18 transitions, 50 flow. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 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 17:10:13,748 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:10:13,748 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-06-27 17:10:13,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:10:13,905 INFO L124 PetriNetUnfolderBase]: 67/123 cut-off events. [2024-06-27 17:10:13,905 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-06-27 17:10:13,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 260 conditions, 123 events. 67/123 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 328 event pairs, 2 based on Foata normal form. 1/95 useless extension candidates. Maximal degree in co-relation 249. Up to 77 conditions per place. [2024-06-27 17:10:13,908 INFO L140 encePairwiseOnDemand]: 12/20 looper letters, 30 selfloop transitions, 11 changer transitions 2/44 dead transitions. [2024-06-27 17:10:13,908 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 44 transitions, 194 flow [2024-06-27 17:10:13,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:10:13,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:10:13,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 62 transitions. [2024-06-27 17:10:13,911 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5166666666666667 [2024-06-27 17:10:13,911 INFO L175 Difference]: Start difference. First operand has 20 places, 18 transitions, 50 flow. Second operand 6 states and 62 transitions. [2024-06-27 17:10:13,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 44 transitions, 194 flow [2024-06-27 17:10:13,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 44 transitions, 190 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-06-27 17:10:13,912 INFO L231 Difference]: Finished difference. Result has 27 places, 28 transitions, 114 flow [2024-06-27 17:10:13,912 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=114, PETRI_PLACES=27, PETRI_TRANSITIONS=28} [2024-06-27 17:10:13,913 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 6 predicate places. [2024-06-27 17:10:13,913 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 28 transitions, 114 flow [2024-06-27 17:10:13,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 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 17:10:13,913 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:10:13,913 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:10:13,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 17:10:13,913 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 17:10:13,914 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:10:13,914 INFO L85 PathProgramCache]: Analyzing trace with hash 1602650249, now seen corresponding path program 2 times [2024-06-27 17:10:13,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:10:13,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789517846] [2024-06-27 17:10:13,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:10:13,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:10:13,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:10:14,134 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 17:10:14,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:10:14,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789517846] [2024-06-27 17:10:14,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789517846] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:10:14,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:10:14,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:10:14,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851383132] [2024-06-27 17:10:14,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:10:14,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:10:14,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:10:14,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:10:14,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:10:14,142 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-06-27 17:10:14,142 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 28 transitions, 114 flow. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 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 17:10:14,142 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:10:14,142 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-06-27 17:10:14,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:10:14,242 INFO L124 PetriNetUnfolderBase]: 67/125 cut-off events. [2024-06-27 17:10:14,242 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2024-06-27 17:10:14,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 381 conditions, 125 events. 67/125 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 328 event pairs, 0 based on Foata normal form. 1/104 useless extension candidates. Maximal degree in co-relation 362. Up to 77 conditions per place. [2024-06-27 17:10:14,244 INFO L140 encePairwiseOnDemand]: 12/20 looper letters, 29 selfloop transitions, 15 changer transitions 2/47 dead transitions. [2024-06-27 17:10:14,244 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 47 transitions, 268 flow [2024-06-27 17:10:14,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:10:14,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:10:14,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 64 transitions. [2024-06-27 17:10:14,248 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45714285714285713 [2024-06-27 17:10:14,248 INFO L175 Difference]: Start difference. First operand has 27 places, 28 transitions, 114 flow. Second operand 7 states and 64 transitions. [2024-06-27 17:10:14,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 47 transitions, 268 flow [2024-06-27 17:10:14,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 47 transitions, 260 flow, removed 4 selfloop flow, removed 0 redundant places. [2024-06-27 17:10:14,254 INFO L231 Difference]: Finished difference. Result has 35 places, 33 transitions, 173 flow [2024-06-27 17:10:14,254 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=173, PETRI_PLACES=35, PETRI_TRANSITIONS=33} [2024-06-27 17:10:14,255 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 14 predicate places. [2024-06-27 17:10:14,255 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 33 transitions, 173 flow [2024-06-27 17:10:14,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 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 17:10:14,255 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:10:14,255 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:10:14,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 17:10:14,256 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 17:10:14,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:10:14,257 INFO L85 PathProgramCache]: Analyzing trace with hash 1602055603, now seen corresponding path program 3 times [2024-06-27 17:10:14,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:10:14,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83910745] [2024-06-27 17:10:14,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:10:14,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:10:14,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:10:14,441 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 17:10:14,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:10:14,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83910745] [2024-06-27 17:10:14,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83910745] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:10:14,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:10:14,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:10:14,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409038318] [2024-06-27 17:10:14,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:10:14,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:10:14,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:10:14,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:10:14,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:10:14,449 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-06-27 17:10:14,449 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 33 transitions, 173 flow. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 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 17:10:14,449 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:10:14,449 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-06-27 17:10:14,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:10:14,563 INFO L124 PetriNetUnfolderBase]: 83/158 cut-off events. [2024-06-27 17:10:14,564 INFO L125 PetriNetUnfolderBase]: For 107/107 co-relation queries the response was YES. [2024-06-27 17:10:14,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 543 conditions, 158 events. 83/158 cut-off events. For 107/107 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 452 event pairs, 6 based on Foata normal form. 1/130 useless extension candidates. Maximal degree in co-relation 520. Up to 58 conditions per place. [2024-06-27 17:10:14,568 INFO L140 encePairwiseOnDemand]: 12/20 looper letters, 35 selfloop transitions, 19 changer transitions 2/57 dead transitions. [2024-06-27 17:10:14,568 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 57 transitions, 368 flow [2024-06-27 17:10:14,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:10:14,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:10:14,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 76 transitions. [2024-06-27 17:10:14,570 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.475 [2024-06-27 17:10:14,570 INFO L175 Difference]: Start difference. First operand has 35 places, 33 transitions, 173 flow. Second operand 8 states and 76 transitions. [2024-06-27 17:10:14,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 57 transitions, 368 flow [2024-06-27 17:10:14,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 57 transitions, 341 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-06-27 17:10:14,586 INFO L231 Difference]: Finished difference. Result has 43 places, 37 transitions, 232 flow [2024-06-27 17:10:14,586 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=232, PETRI_PLACES=43, PETRI_TRANSITIONS=37} [2024-06-27 17:10:14,587 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 22 predicate places. [2024-06-27 17:10:14,587 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 37 transitions, 232 flow [2024-06-27 17:10:14,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 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 17:10:14,587 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:10:14,587 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:10:14,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 17:10:14,588 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 17:10:14,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:10:14,588 INFO L85 PathProgramCache]: Analyzing trace with hash -1373918319, now seen corresponding path program 1 times [2024-06-27 17:10:14,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:10:14,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143117916] [2024-06-27 17:10:14,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:10:14,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:10:14,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:10:14,732 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 17:10:14,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:10:14,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143117916] [2024-06-27 17:10:14,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143117916] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:10:14,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075586122] [2024-06-27 17:10:14,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:10:14,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:10:14,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:10:14,735 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 17:10:14,766 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 17:10:14,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:10:14,814 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 32 conjunts are in the unsatisfiable core [2024-06-27 17:10:14,821 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:10:14,889 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-06-27 17:10:15,141 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-06-27 17:10:15,142 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 17 [2024-06-27 17:10:15,157 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 17:10:15,157 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:10:15,639 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 64 [2024-06-27 17:10:15,657 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:10:15,658 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 131 treesize of output 129 [2024-06-27 17:10:16,015 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 17:10:16,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075586122] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:10:16,016 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:10:16,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 22 [2024-06-27 17:10:16,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962988050] [2024-06-27 17:10:16,016 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:10:16,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-06-27 17:10:16,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:10:16,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-06-27 17:10:16,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=351, Unknown=0, NotChecked=0, Total=462 [2024-06-27 17:10:16,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-06-27 17:10:16,018 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 37 transitions, 232 flow. Second operand has 22 states, 22 states have (on average 5.045454545454546) internal successors, (111), 22 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:10:16,018 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:10:16,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-06-27 17:10:16,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:10:16,879 INFO L124 PetriNetUnfolderBase]: 273/493 cut-off events. [2024-06-27 17:10:16,880 INFO L125 PetriNetUnfolderBase]: For 716/716 co-relation queries the response was YES. [2024-06-27 17:10:16,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1862 conditions, 493 events. 273/493 cut-off events. For 716/716 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1979 event pairs, 26 based on Foata normal form. 13/504 useless extension candidates. Maximal degree in co-relation 1213. Up to 171 conditions per place. [2024-06-27 17:10:16,883 INFO L140 encePairwiseOnDemand]: 10/20 looper letters, 71 selfloop transitions, 41 changer transitions 54/167 dead transitions. [2024-06-27 17:10:16,883 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 167 transitions, 1184 flow [2024-06-27 17:10:16,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-06-27 17:10:16,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-06-27 17:10:16,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 239 transitions. [2024-06-27 17:10:16,885 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4425925925925926 [2024-06-27 17:10:16,885 INFO L175 Difference]: Start difference. First operand has 43 places, 37 transitions, 232 flow. Second operand 27 states and 239 transitions. [2024-06-27 17:10:16,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 167 transitions, 1184 flow [2024-06-27 17:10:16,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 167 transitions, 1129 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-27 17:10:16,891 INFO L231 Difference]: Finished difference. Result has 77 places, 59 transitions, 496 flow [2024-06-27 17:10:16,891 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=201, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=496, PETRI_PLACES=77, PETRI_TRANSITIONS=59} [2024-06-27 17:10:16,891 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 56 predicate places. [2024-06-27 17:10:16,892 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 59 transitions, 496 flow [2024-06-27 17:10:16,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.045454545454546) internal successors, (111), 22 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:10:16,892 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:10:16,892 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:10:16,909 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 17:10:17,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:10:17,107 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 17:10:17,107 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:10:17,107 INFO L85 PathProgramCache]: Analyzing trace with hash -1621282384, now seen corresponding path program 1 times [2024-06-27 17:10:17,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:10:17,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44993038] [2024-06-27 17:10:17,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:10:17,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:10:17,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:10:17,357 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 17:10:17,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:10:17,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44993038] [2024-06-27 17:10:17,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44993038] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:10:17,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309662190] [2024-06-27 17:10:17,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:10:17,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:10:17,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:10:17,360 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 17:10:17,387 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 17:10:17,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:10:17,417 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 13 conjunts are in the unsatisfiable core [2024-06-27 17:10:17,419 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:10:17,493 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-06-27 17:10:17,496 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 17:10:17,496 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:10:17,604 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-06-27 17:10:17,604 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 22 [2024-06-27 17:10:17,645 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 17:10:17,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309662190] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:10:17,646 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:10:17,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 15 [2024-06-27 17:10:17,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776513226] [2024-06-27 17:10:17,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:10:17,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-06-27 17:10:17,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:10:17,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-06-27 17:10:17,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2024-06-27 17:10:17,647 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-06-27 17:10:17,648 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 59 transitions, 496 flow. Second operand has 16 states, 16 states have (on average 5.5625) internal successors, (89), 16 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:10:17,648 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:10:17,648 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-06-27 17:10:17,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:10:17,836 INFO L124 PetriNetUnfolderBase]: 217/389 cut-off events. [2024-06-27 17:10:17,836 INFO L125 PetriNetUnfolderBase]: For 1487/1487 co-relation queries the response was YES. [2024-06-27 17:10:17,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1906 conditions, 389 events. 217/389 cut-off events. For 1487/1487 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1439 event pairs, 9 based on Foata normal form. 1/388 useless extension candidates. Maximal degree in co-relation 1848. Up to 236 conditions per place. [2024-06-27 17:10:17,839 INFO L140 encePairwiseOnDemand]: 11/20 looper letters, 59 selfloop transitions, 35 changer transitions 3/98 dead transitions. [2024-06-27 17:10:17,839 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 98 transitions, 916 flow [2024-06-27 17:10:17,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:10:17,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:10:17,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 94 transitions. [2024-06-27 17:10:17,840 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47 [2024-06-27 17:10:17,841 INFO L175 Difference]: Start difference. First operand has 77 places, 59 transitions, 496 flow. Second operand 10 states and 94 transitions. [2024-06-27 17:10:17,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 98 transitions, 916 flow [2024-06-27 17:10:17,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 98 transitions, 795 flow, removed 47 selfloop flow, removed 12 redundant places. [2024-06-27 17:10:17,847 INFO L231 Difference]: Finished difference. Result has 68 places, 71 transitions, 590 flow [2024-06-27 17:10:17,847 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=399, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=590, PETRI_PLACES=68, PETRI_TRANSITIONS=71} [2024-06-27 17:10:17,848 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 47 predicate places. [2024-06-27 17:10:17,848 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 71 transitions, 590 flow [2024-06-27 17:10:17,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.5625) internal successors, (89), 16 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:10:17,848 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:10:17,848 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:10:17,862 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 17:10:18,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-06-27 17:10:18,057 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 17:10:18,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:10:18,058 INFO L85 PathProgramCache]: Analyzing trace with hash 948205454, now seen corresponding path program 2 times [2024-06-27 17:10:18,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:10:18,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365115878] [2024-06-27 17:10:18,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:10:18,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:10:18,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:10:18,216 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 17:10:18,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:10:18,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365115878] [2024-06-27 17:10:18,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365115878] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:10:18,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197367509] [2024-06-27 17:10:18,217 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 17:10:18,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:10:18,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:10:18,224 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 17:10:18,240 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 17:10:18,277 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 17:10:18,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:10:18,278 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 19 conjunts are in the unsatisfiable core [2024-06-27 17:10:18,279 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:10:18,373 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 32 [2024-06-27 17:10:18,381 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 17:10:18,382 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:10:18,485 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:10:18,486 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 33 [2024-06-27 17:10:18,556 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 17:10:18,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1197367509] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:10:18,557 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:10:18,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 11 [2024-06-27 17:10:18,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405204592] [2024-06-27 17:10:18,558 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:10:18,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 17:10:18,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:10:18,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 17:10:18,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2024-06-27 17:10:18,559 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-06-27 17:10:18,559 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 71 transitions, 590 flow. Second operand has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 12 states have internal predecessors, (64), 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 17:10:18,560 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:10:18,560 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-06-27 17:10:18,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:10:18,782 INFO L124 PetriNetUnfolderBase]: 257/455 cut-off events. [2024-06-27 17:10:18,782 INFO L125 PetriNetUnfolderBase]: For 1502/1502 co-relation queries the response was YES. [2024-06-27 17:10:18,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2272 conditions, 455 events. 257/455 cut-off events. For 1502/1502 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 1761 event pairs, 25 based on Foata normal form. 1/456 useless extension candidates. Maximal degree in co-relation 2148. Up to 350 conditions per place. [2024-06-27 17:10:18,785 INFO L140 encePairwiseOnDemand]: 10/20 looper letters, 66 selfloop transitions, 39 changer transitions 3/109 dead transitions. [2024-06-27 17:10:18,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 109 transitions, 1045 flow [2024-06-27 17:10:18,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 17:10:18,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 17:10:18,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 94 transitions. [2024-06-27 17:10:18,786 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42727272727272725 [2024-06-27 17:10:18,787 INFO L175 Difference]: Start difference. First operand has 68 places, 71 transitions, 590 flow. Second operand 11 states and 94 transitions. [2024-06-27 17:10:18,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 109 transitions, 1045 flow [2024-06-27 17:10:18,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 109 transitions, 977 flow, removed 21 selfloop flow, removed 3 redundant places. [2024-06-27 17:10:18,793 INFO L231 Difference]: Finished difference. Result has 78 places, 87 transitions, 803 flow [2024-06-27 17:10:18,793 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=542, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=803, PETRI_PLACES=78, PETRI_TRANSITIONS=87} [2024-06-27 17:10:18,794 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 57 predicate places. [2024-06-27 17:10:18,794 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 87 transitions, 803 flow [2024-06-27 17:10:18,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 12 states have internal predecessors, (64), 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 17:10:18,794 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:10:18,794 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:10:18,808 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 17:10:19,008 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 17:10:19,008 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 17:10:19,008 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:10:19,009 INFO L85 PathProgramCache]: Analyzing trace with hash 167384518, now seen corresponding path program 3 times [2024-06-27 17:10:19,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:10:19,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639395] [2024-06-27 17:10:19,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:10:19,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:10:19,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:10:19,182 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 17:10:19,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:10:19,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639395] [2024-06-27 17:10:19,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639395] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:10:19,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466141132] [2024-06-27 17:10:19,183 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 17:10:19,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:10:19,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:10:19,201 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 17:10:19,204 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 17:10:19,256 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-06-27 17:10:19,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:10:19,257 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 19 conjunts are in the unsatisfiable core [2024-06-27 17:10:19,259 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:10:19,342 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-06-27 17:10:19,348 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 17:10:19,348 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:10:19,393 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:10:19,394 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 69 [2024-06-27 17:10:19,481 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 17:10:19,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466141132] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:10:19,481 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:10:19,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 13 [2024-06-27 17:10:19,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018240185] [2024-06-27 17:10:19,482 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:10:19,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-27 17:10:19,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:10:19,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-27 17:10:19,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2024-06-27 17:10:19,483 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-06-27 17:10:19,483 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 87 transitions, 803 flow. Second operand has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 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 17:10:19,483 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:10:19,484 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-06-27 17:10:19,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:10:19,765 INFO L124 PetriNetUnfolderBase]: 271/513 cut-off events. [2024-06-27 17:10:19,766 INFO L125 PetriNetUnfolderBase]: For 1632/1632 co-relation queries the response was YES. [2024-06-27 17:10:19,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2524 conditions, 513 events. 271/513 cut-off events. For 1632/1632 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2244 event pairs, 0 based on Foata normal form. 1/514 useless extension candidates. Maximal degree in co-relation 2351. Up to 273 conditions per place. [2024-06-27 17:10:19,769 INFO L140 encePairwiseOnDemand]: 11/20 looper letters, 74 selfloop transitions, 56 changer transitions 8/139 dead transitions. [2024-06-27 17:10:19,770 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 139 transitions, 1386 flow [2024-06-27 17:10:19,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-27 17:10:19,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-27 17:10:19,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 110 transitions. [2024-06-27 17:10:19,771 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-27 17:10:19,771 INFO L175 Difference]: Start difference. First operand has 78 places, 87 transitions, 803 flow. Second operand 14 states and 110 transitions. [2024-06-27 17:10:19,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 139 transitions, 1386 flow [2024-06-27 17:10:19,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 139 transitions, 1328 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-27 17:10:19,779 INFO L231 Difference]: Finished difference. Result has 89 places, 106 transitions, 1096 flow [2024-06-27 17:10:19,779 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=751, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1096, PETRI_PLACES=89, PETRI_TRANSITIONS=106} [2024-06-27 17:10:19,780 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 68 predicate places. [2024-06-27 17:10:19,780 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 106 transitions, 1096 flow [2024-06-27 17:10:19,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 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 17:10:19,780 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:10:19,780 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:10:19,802 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 17:10:19,992 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 17:10:19,992 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 17:10:19,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:10:19,993 INFO L85 PathProgramCache]: Analyzing trace with hash -1034006108, now seen corresponding path program 4 times [2024-06-27 17:10:19,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:10:19,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757167891] [2024-06-27 17:10:19,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:10:19,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:10:20,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:10:20,170 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 17:10:20,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:10:20,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757167891] [2024-06-27 17:10:20,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757167891] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:10:20,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245463789] [2024-06-27 17:10:20,171 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 17:10:20,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:10:20,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:10:20,172 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 17:10:20,174 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 17:10:20,226 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 17:10:20,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:10:20,227 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 13 conjunts are in the unsatisfiable core [2024-06-27 17:10:20,228 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:10:20,285 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-06-27 17:10:20,290 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 17:10:20,290 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:10:20,354 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:10:20,354 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 33 [2024-06-27 17:10:20,422 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 17:10:20,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245463789] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:10:20,422 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:10:20,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 15 [2024-06-27 17:10:20,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040625273] [2024-06-27 17:10:20,423 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:10:20,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-06-27 17:10:20,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:10:20,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-06-27 17:10:20,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2024-06-27 17:10:20,424 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-06-27 17:10:20,424 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 106 transitions, 1096 flow. Second operand has 16 states, 16 states have (on average 5.3125) internal successors, (85), 16 states have internal predecessors, (85), 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 17:10:20,424 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:10:20,424 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-06-27 17:10:20,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:10:20,663 INFO L124 PetriNetUnfolderBase]: 261/501 cut-off events. [2024-06-27 17:10:20,663 INFO L125 PetriNetUnfolderBase]: For 2151/2151 co-relation queries the response was YES. [2024-06-27 17:10:20,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2721 conditions, 501 events. 261/501 cut-off events. For 2151/2151 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2200 event pairs, 26 based on Foata normal form. 2/503 useless extension candidates. Maximal degree in co-relation 2651. Up to 366 conditions per place. [2024-06-27 17:10:20,666 INFO L140 encePairwiseOnDemand]: 11/20 looper letters, 73 selfloop transitions, 46 changer transitions 5/125 dead transitions. [2024-06-27 17:10:20,666 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 125 transitions, 1448 flow [2024-06-27 17:10:20,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:10:20,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:10:20,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 78 transitions. [2024-06-27 17:10:20,668 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2024-06-27 17:10:20,668 INFO L175 Difference]: Start difference. First operand has 89 places, 106 transitions, 1096 flow. Second operand 9 states and 78 transitions. [2024-06-27 17:10:20,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 125 transitions, 1448 flow [2024-06-27 17:10:20,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 125 transitions, 1345 flow, removed 19 selfloop flow, removed 10 redundant places. [2024-06-27 17:10:20,676 INFO L231 Difference]: Finished difference. Result has 88 places, 107 transitions, 1135 flow [2024-06-27 17:10:20,676 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=993, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1135, PETRI_PLACES=88, PETRI_TRANSITIONS=107} [2024-06-27 17:10:20,676 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 67 predicate places. [2024-06-27 17:10:20,677 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 107 transitions, 1135 flow [2024-06-27 17:10:20,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.3125) internal successors, (85), 16 states have internal predecessors, (85), 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 17:10:20,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:10:20,677 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:10:20,702 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 17:10:20,888 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 17:10:20,889 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 17:10:20,889 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:10:20,889 INFO L85 PathProgramCache]: Analyzing trace with hash -626578467, now seen corresponding path program 5 times [2024-06-27 17:10:20,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:10:20,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104719030] [2024-06-27 17:10:20,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:10:20,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:10:20,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:10:21,006 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 17:10:21,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:10:21,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104719030] [2024-06-27 17:10:21,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104719030] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:10:21,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162107015] [2024-06-27 17:10:21,007 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-27 17:10:21,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:10:21,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:10:21,009 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 17:10:21,010 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 17:10:21,116 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-06-27 17:10:21,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:10:21,117 INFO L262 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 7 conjunts are in the unsatisfiable core [2024-06-27 17:10:21,118 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:10:21,158 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 17:10:21,158 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-27 17:10:21,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162107015] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:10:21,159 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-06-27 17:10:21,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2024-06-27 17:10:21,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468341351] [2024-06-27 17:10:21,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:10:21,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:10:21,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:10:21,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:10:21,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 17:10:21,160 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-06-27 17:10:21,161 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 107 transitions, 1135 flow. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 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 17:10:21,161 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:10:21,161 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-06-27 17:10:21,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:10:21,289 INFO L124 PetriNetUnfolderBase]: 283/548 cut-off events. [2024-06-27 17:10:21,289 INFO L125 PetriNetUnfolderBase]: For 2443/2443 co-relation queries the response was YES. [2024-06-27 17:10:21,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3021 conditions, 548 events. 283/548 cut-off events. For 2443/2443 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 2457 event pairs, 43 based on Foata normal form. 10/558 useless extension candidates. Maximal degree in co-relation 2901. Up to 216 conditions per place. [2024-06-27 17:10:21,293 INFO L140 encePairwiseOnDemand]: 16/20 looper letters, 93 selfloop transitions, 42 changer transitions 0/136 dead transitions. [2024-06-27 17:10:21,293 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 136 transitions, 1633 flow [2024-06-27 17:10:21,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:10:21,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:10:21,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 59 transitions. [2024-06-27 17:10:21,294 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.59 [2024-06-27 17:10:21,295 INFO L175 Difference]: Start difference. First operand has 88 places, 107 transitions, 1135 flow. Second operand 5 states and 59 transitions. [2024-06-27 17:10:21,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 136 transitions, 1633 flow [2024-06-27 17:10:21,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 136 transitions, 1540 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-27 17:10:21,304 INFO L231 Difference]: Finished difference. Result has 89 places, 114 transitions, 1279 flow [2024-06-27 17:10:21,304 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=1050, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1279, PETRI_PLACES=89, PETRI_TRANSITIONS=114} [2024-06-27 17:10:21,304 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 68 predicate places. [2024-06-27 17:10:21,305 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 114 transitions, 1279 flow [2024-06-27 17:10:21,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 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 17:10:21,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:10:21,305 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:10:21,330 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 17:10:21,518 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 17:10:21,518 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 17:10:21,519 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:10:21,519 INFO L85 PathProgramCache]: Analyzing trace with hash -1232031080, now seen corresponding path program 2 times [2024-06-27 17:10:21,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:10:21,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964681582] [2024-06-27 17:10:21,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:10:21,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:10:21,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:10:21,630 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:10:21,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:10:21,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964681582] [2024-06-27 17:10:21,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964681582] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:10:21,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204927966] [2024-06-27 17:10:21,633 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 17:10:21,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:10:21,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:10:21,636 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 17:10:21,657 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 17:10:21,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 17:10:21,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:10:21,725 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 9 conjunts are in the unsatisfiable core [2024-06-27 17:10:21,725 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:10:21,760 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:10:21,760 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:10:21,859 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:10:21,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204927966] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:10:21,859 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:10:21,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-06-27 17:10:21,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112701841] [2024-06-27 17:10:21,860 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:10:21,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 17:10:21,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:10:21,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 17:10:21,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2024-06-27 17:10:21,861 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-06-27 17:10:21,861 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 114 transitions, 1279 flow. Second operand has 12 states, 12 states have (on average 5.25) internal successors, (63), 12 states have internal predecessors, (63), 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 17:10:21,861 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:10:21,862 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-06-27 17:10:21,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:10:22,365 INFO L124 PetriNetUnfolderBase]: 401/805 cut-off events. [2024-06-27 17:10:22,365 INFO L125 PetriNetUnfolderBase]: For 4027/4027 co-relation queries the response was YES. [2024-06-27 17:10:22,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4359 conditions, 805 events. 401/805 cut-off events. For 4027/4027 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 4175 event pairs, 56 based on Foata normal form. 21/825 useless extension candidates. Maximal degree in co-relation 4233. Up to 257 conditions per place. [2024-06-27 17:10:22,371 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 127 selfloop transitions, 94 changer transitions 0/222 dead transitions. [2024-06-27 17:10:22,371 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 222 transitions, 2463 flow [2024-06-27 17:10:22,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-06-27 17:10:22,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-06-27 17:10:22,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 183 transitions. [2024-06-27 17:10:22,373 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4575 [2024-06-27 17:10:22,373 INFO L175 Difference]: Start difference. First operand has 89 places, 114 transitions, 1279 flow. Second operand 20 states and 183 transitions. [2024-06-27 17:10:22,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 222 transitions, 2463 flow [2024-06-27 17:10:22,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 222 transitions, 2381 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-27 17:10:22,388 INFO L231 Difference]: Finished difference. Result has 116 places, 159 transitions, 2012 flow [2024-06-27 17:10:22,388 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=1210, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2012, PETRI_PLACES=116, PETRI_TRANSITIONS=159} [2024-06-27 17:10:22,389 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 95 predicate places. [2024-06-27 17:10:22,389 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 159 transitions, 2012 flow [2024-06-27 17:10:22,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 12 states have internal predecessors, (63), 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 17:10:22,389 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:10:22,389 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:10:22,403 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-06-27 17:10:22,600 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 17:10:22,600 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 17:10:22,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:10:22,601 INFO L85 PathProgramCache]: Analyzing trace with hash 200655015, now seen corresponding path program 6 times [2024-06-27 17:10:22,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:10:22,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916877810] [2024-06-27 17:10:22,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:10:22,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:10:22,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:10:22,745 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 17:10:22,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:10:22,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916877810] [2024-06-27 17:10:22,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916877810] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:10:22,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577740461] [2024-06-27 17:10:22,746 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-27 17:10:22,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:10:22,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:10:22,747 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 17:10:22,747 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 17:10:22,808 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-06-27 17:10:22,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:10:22,809 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 32 conjunts are in the unsatisfiable core [2024-06-27 17:10:22,811 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:10:22,829 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-06-27 17:10:22,943 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-06-27 17:10:22,957 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:10:22,957 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:10:23,374 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2024-06-27 17:10:23,381 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-06-27 17:10:23,382 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 41 [2024-06-27 17:10:23,417 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:10:23,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577740461] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:10:23,418 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:10:23,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 22 [2024-06-27 17:10:23,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672850914] [2024-06-27 17:10:23,418 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:10:23,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-06-27 17:10:23,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:10:23,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-06-27 17:10:23,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2024-06-27 17:10:23,420 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-06-27 17:10:23,420 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 159 transitions, 2012 flow. Second operand has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:10:23,420 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:10:23,420 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-06-27 17:10:23,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:10:24,616 INFO L124 PetriNetUnfolderBase]: 480/1047 cut-off events. [2024-06-27 17:10:24,617 INFO L125 PetriNetUnfolderBase]: For 7400/7400 co-relation queries the response was YES. [2024-06-27 17:10:24,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6198 conditions, 1047 events. 480/1047 cut-off events. For 7400/7400 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 6342 event pairs, 21 based on Foata normal form. 30/1076 useless extension candidates. Maximal degree in co-relation 6080. Up to 235 conditions per place. [2024-06-27 17:10:24,624 INFO L140 encePairwiseOnDemand]: 10/20 looper letters, 182 selfloop transitions, 97 changer transitions 35/315 dead transitions. [2024-06-27 17:10:24,624 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 315 transitions, 3829 flow [2024-06-27 17:10:24,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-06-27 17:10:24,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2024-06-27 17:10:24,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 313 transitions. [2024-06-27 17:10:24,626 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43472222222222223 [2024-06-27 17:10:24,626 INFO L175 Difference]: Start difference. First operand has 116 places, 159 transitions, 2012 flow. Second operand 36 states and 313 transitions. [2024-06-27 17:10:24,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 315 transitions, 3829 flow [2024-06-27 17:10:24,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 315 transitions, 3670 flow, removed 73 selfloop flow, removed 2 redundant places. [2024-06-27 17:10:24,653 INFO L231 Difference]: Finished difference. Result has 163 places, 175 transitions, 2379 flow [2024-06-27 17:10:24,653 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=1772, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=2379, PETRI_PLACES=163, PETRI_TRANSITIONS=175} [2024-06-27 17:10:24,654 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 142 predicate places. [2024-06-27 17:10:24,655 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 175 transitions, 2379 flow [2024-06-27 17:10:24,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:10:24,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:10:24,655 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:10:24,684 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 17:10:24,869 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 17:10:24,869 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 17:10:24,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:10:24,870 INFO L85 PathProgramCache]: Analyzing trace with hash 1023083931, now seen corresponding path program 7 times [2024-06-27 17:10:24,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:10:24,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208558769] [2024-06-27 17:10:24,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:10:24,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:10:24,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:10:24,980 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 17:10:24,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:10:24,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208558769] [2024-06-27 17:10:24,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208558769] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:10:24,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352744512] [2024-06-27 17:10:24,981 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-06-27 17:10:24,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:10:24,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:10:24,982 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 17:10:24,983 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 17:10:25,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:10:25,038 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 29 conjunts are in the unsatisfiable core [2024-06-27 17:10:25,039 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:10:25,062 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-06-27 17:10:25,208 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-06-27 17:10:25,208 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 50 [2024-06-27 17:10:25,226 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:10:25,227 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:10:25,510 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 130 treesize of output 116 [2024-06-27 17:10:25,535 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:10:25,536 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 298 treesize of output 240 [2024-06-27 17:10:26,282 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:10:26,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352744512] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:10:26,283 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:10:26,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 18 [2024-06-27 17:10:26,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876082100] [2024-06-27 17:10:26,283 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:10:26,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-06-27 17:10:26,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:10:26,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-06-27 17:10:26,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2024-06-27 17:10:26,284 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-06-27 17:10:26,284 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 175 transitions, 2379 flow. Second operand has 18 states, 18 states have (on average 5.666666666666667) internal successors, (102), 18 states have internal predecessors, (102), 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 17:10:26,284 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:10:26,284 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-06-27 17:10:26,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:10:26,982 INFO L124 PetriNetUnfolderBase]: 421/888 cut-off events. [2024-06-27 17:10:26,982 INFO L125 PetriNetUnfolderBase]: For 9197/9197 co-relation queries the response was YES. [2024-06-27 17:10:26,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5916 conditions, 888 events. 421/888 cut-off events. For 9197/9197 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 5015 event pairs, 26 based on Foata normal form. 19/906 useless extension candidates. Maximal degree in co-relation 5788. Up to 214 conditions per place. [2024-06-27 17:10:26,990 INFO L140 encePairwiseOnDemand]: 11/20 looper letters, 103 selfloop transitions, 50 changer transitions 88/242 dead transitions. [2024-06-27 17:10:26,991 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 242 transitions, 3301 flow [2024-06-27 17:10:26,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-06-27 17:10:26,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-06-27 17:10:26,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 196 transitions. [2024-06-27 17:10:26,992 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44545454545454544 [2024-06-27 17:10:26,992 INFO L175 Difference]: Start difference. First operand has 163 places, 175 transitions, 2379 flow. Second operand 22 states and 196 transitions. [2024-06-27 17:10:26,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 242 transitions, 3301 flow [2024-06-27 17:10:27,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 242 transitions, 2981 flow, removed 121 selfloop flow, removed 14 redundant places. [2024-06-27 17:10:27,055 INFO L231 Difference]: Finished difference. Result has 167 places, 130 transitions, 1597 flow [2024-06-27 17:10:27,056 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=2022, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1597, PETRI_PLACES=167, PETRI_TRANSITIONS=130} [2024-06-27 17:10:27,056 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 146 predicate places. [2024-06-27 17:10:27,056 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 130 transitions, 1597 flow [2024-06-27 17:10:27,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.666666666666667) internal successors, (102), 18 states have internal predecessors, (102), 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 17:10:27,057 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:10:27,057 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:10:27,076 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 17:10:27,272 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 17:10:27,272 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 17:10:27,273 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:10:27,273 INFO L85 PathProgramCache]: Analyzing trace with hash -1622968242, now seen corresponding path program 3 times [2024-06-27 17:10:27,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:10:27,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677148910] [2024-06-27 17:10:27,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:10:27,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:10:27,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:10:27,367 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:10:27,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:10:27,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677148910] [2024-06-27 17:10:27,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677148910] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:10:27,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820853536] [2024-06-27 17:10:27,368 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 17:10:27,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:10:27,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:10:27,377 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 17:10:27,404 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 17:10:27,450 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-06-27 17:10:27,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:10:27,451 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 9 conjunts are in the unsatisfiable core [2024-06-27 17:10:27,452 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:10:27,487 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:10:27,487 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:10:27,564 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:10:27,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820853536] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:10:27,564 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:10:27,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-06-27 17:10:27,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871882585] [2024-06-27 17:10:27,565 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:10:27,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 17:10:27,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:10:27,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 17:10:27,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2024-06-27 17:10:27,566 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-06-27 17:10:27,566 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 130 transitions, 1597 flow. Second operand has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 12 states have internal predecessors, (59), 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 17:10:27,566 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:10:27,566 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-06-27 17:10:27,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:10:27,967 INFO L124 PetriNetUnfolderBase]: 299/594 cut-off events. [2024-06-27 17:10:27,967 INFO L125 PetriNetUnfolderBase]: For 5161/5161 co-relation queries the response was YES. [2024-06-27 17:10:27,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3784 conditions, 594 events. 299/594 cut-off events. For 5161/5161 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 2903 event pairs, 41 based on Foata normal form. 18/611 useless extension candidates. Maximal degree in co-relation 3708. Up to 192 conditions per place. [2024-06-27 17:10:27,972 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 100 selfloop transitions, 71 changer transitions 0/172 dead transitions. [2024-06-27 17:10:27,972 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 172 transitions, 2176 flow [2024-06-27 17:10:27,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-27 17:10:27,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-27 17:10:27,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 143 transitions. [2024-06-27 17:10:27,974 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4766666666666667 [2024-06-27 17:10:27,974 INFO L175 Difference]: Start difference. First operand has 167 places, 130 transitions, 1597 flow. Second operand 15 states and 143 transitions. [2024-06-27 17:10:27,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 172 transitions, 2176 flow [2024-06-27 17:10:27,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 172 transitions, 1931 flow, removed 52 selfloop flow, removed 26 redundant places. [2024-06-27 17:10:27,993 INFO L231 Difference]: Finished difference. Result has 127 places, 132 transitions, 1594 flow [2024-06-27 17:10:27,993 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=1348, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1594, PETRI_PLACES=127, PETRI_TRANSITIONS=132} [2024-06-27 17:10:27,993 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 106 predicate places. [2024-06-27 17:10:27,993 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 132 transitions, 1594 flow [2024-06-27 17:10:27,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 12 states have internal predecessors, (59), 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 17:10:27,994 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:10:27,994 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:10:28,007 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-06-27 17:10:28,207 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 17:10:28,208 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 17:10:28,208 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:10:28,208 INFO L85 PathProgramCache]: Analyzing trace with hash 611139252, now seen corresponding path program 4 times [2024-06-27 17:10:28,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:10:28,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041828380] [2024-06-27 17:10:28,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:10:28,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:10:28,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:10:28,289 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:10:28,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:10:28,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041828380] [2024-06-27 17:10:28,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041828380] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:10:28,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128076819] [2024-06-27 17:10:28,290 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 17:10:28,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:10:28,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:10:28,291 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 17:10:28,293 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 17:10:28,354 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 17:10:28,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:10:28,355 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 9 conjunts are in the unsatisfiable core [2024-06-27 17:10:28,356 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:10:28,381 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:10:28,381 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:10:28,498 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:10:28,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128076819] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:10:28,498 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:10:28,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-06-27 17:10:28,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969322948] [2024-06-27 17:10:28,499 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:10:28,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 17:10:28,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:10:28,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 17:10:28,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2024-06-27 17:10:28,500 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-06-27 17:10:28,500 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 132 transitions, 1594 flow. Second operand has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 12 states have internal predecessors, (59), 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 17:10:28,500 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:10:28,500 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-06-27 17:10:28,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:10:28,809 INFO L124 PetriNetUnfolderBase]: 482/903 cut-off events. [2024-06-27 17:10:28,809 INFO L125 PetriNetUnfolderBase]: For 7012/7012 co-relation queries the response was YES. [2024-06-27 17:10:28,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5740 conditions, 903 events. 482/903 cut-off events. For 7012/7012 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 4628 event pairs, 81 based on Foata normal form. 14/916 useless extension candidates. Maximal degree in co-relation 5679. Up to 494 conditions per place. [2024-06-27 17:10:28,821 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 135 selfloop transitions, 100 changer transitions 2/238 dead transitions. [2024-06-27 17:10:28,822 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 238 transitions, 3216 flow [2024-06-27 17:10:28,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-27 17:10:28,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-27 17:10:28,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 132 transitions. [2024-06-27 17:10:28,824 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4714285714285714 [2024-06-27 17:10:28,824 INFO L175 Difference]: Start difference. First operand has 127 places, 132 transitions, 1594 flow. Second operand 14 states and 132 transitions. [2024-06-27 17:10:28,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 238 transitions, 3216 flow [2024-06-27 17:10:28,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 238 transitions, 3065 flow, removed 27 selfloop flow, removed 7 redundant places. [2024-06-27 17:10:28,852 INFO L231 Difference]: Finished difference. Result has 140 places, 189 transitions, 2618 flow [2024-06-27 17:10:28,852 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=1479, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2618, PETRI_PLACES=140, PETRI_TRANSITIONS=189} [2024-06-27 17:10:28,853 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 119 predicate places. [2024-06-27 17:10:28,853 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 189 transitions, 2618 flow [2024-06-27 17:10:28,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 12 states have internal predecessors, (59), 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 17:10:28,854 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:10:28,854 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:10:28,867 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 17:10:29,064 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 17:10:29,065 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 17:10:29,065 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:10:29,065 INFO L85 PathProgramCache]: Analyzing trace with hash -263196074, now seen corresponding path program 5 times [2024-06-27 17:10:29,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:10:29,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327373150] [2024-06-27 17:10:29,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:10:29,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:10:29,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:10:29,155 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:10:29,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:10:29,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327373150] [2024-06-27 17:10:29,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327373150] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:10:29,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105808794] [2024-06-27 17:10:29,155 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-27 17:10:29,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:10:29,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:10:29,157 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 17:10:29,158 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 17:10:29,246 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 17:10:29,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:10:29,247 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 9 conjunts are in the unsatisfiable core [2024-06-27 17:10:29,248 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:10:29,285 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:10:29,285 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:10:29,369 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:10:29,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105808794] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:10:29,370 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:10:29,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-06-27 17:10:29,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625060100] [2024-06-27 17:10:29,370 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:10:29,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 17:10:29,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:10:29,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 17:10:29,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2024-06-27 17:10:29,371 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-06-27 17:10:29,371 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 189 transitions, 2618 flow. Second operand has 12 states, 12 states have (on average 5.0) internal successors, (60), 12 states have internal predecessors, (60), 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 17:10:29,371 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:10:29,371 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-06-27 17:10:29,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:10:29,904 INFO L124 PetriNetUnfolderBase]: 703/1370 cut-off events. [2024-06-27 17:10:29,905 INFO L125 PetriNetUnfolderBase]: For 14158/14158 co-relation queries the response was YES. [2024-06-27 17:10:29,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9355 conditions, 1370 events. 703/1370 cut-off events. For 14158/14158 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 7994 event pairs, 18 based on Foata normal form. 6/1375 useless extension candidates. Maximal degree in co-relation 9287. Up to 372 conditions per place. [2024-06-27 17:10:29,916 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 171 selfloop transitions, 157 changer transitions 0/329 dead transitions. [2024-06-27 17:10:29,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 329 transitions, 5044 flow [2024-06-27 17:10:29,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-06-27 17:10:29,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-06-27 17:10:29,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 160 transitions. [2024-06-27 17:10:29,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47058823529411764 [2024-06-27 17:10:29,918 INFO L175 Difference]: Start difference. First operand has 140 places, 189 transitions, 2618 flow. Second operand 17 states and 160 transitions. [2024-06-27 17:10:29,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 329 transitions, 5044 flow [2024-06-27 17:10:29,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 329 transitions, 4619 flow, removed 193 selfloop flow, removed 9 redundant places. [2024-06-27 17:10:29,977 INFO L231 Difference]: Finished difference. Result has 154 places, 242 transitions, 3595 flow [2024-06-27 17:10:29,978 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=2303, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=3595, PETRI_PLACES=154, PETRI_TRANSITIONS=242} [2024-06-27 17:10:29,978 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 133 predicate places. [2024-06-27 17:10:29,978 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 242 transitions, 3595 flow [2024-06-27 17:10:29,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.0) internal successors, (60), 12 states have internal predecessors, (60), 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 17:10:29,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:10:29,978 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:10:29,993 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 17:10:30,181 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 17:10:30,182 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 17:10:30,182 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:10:30,182 INFO L85 PathProgramCache]: Analyzing trace with hash -1019024268, now seen corresponding path program 6 times [2024-06-27 17:10:30,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:10:30,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689765252] [2024-06-27 17:10:30,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:10:30,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:10:30,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:10:30,275 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:10:30,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:10:30,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689765252] [2024-06-27 17:10:30,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689765252] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:10:30,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528639046] [2024-06-27 17:10:30,276 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-27 17:10:30,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:10:30,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:10:30,278 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 17:10:30,304 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 17:10:30,348 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-06-27 17:10:30,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:10:30,349 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 8 conjunts are in the unsatisfiable core [2024-06-27 17:10:30,349 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:10:30,371 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:10:30,372 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:10:30,421 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:10:30,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528639046] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:10:30,422 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:10:30,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2024-06-27 17:10:30,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473842038] [2024-06-27 17:10:30,422 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:10:30,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 17:10:30,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:10:30,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 17:10:30,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2024-06-27 17:10:30,423 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-06-27 17:10:30,423 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 242 transitions, 3595 flow. Second operand has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 11 states have internal predecessors, (56), 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 17:10:30,424 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:10:30,424 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-06-27 17:10:30,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:10:30,819 INFO L124 PetriNetUnfolderBase]: 698/1371 cut-off events. [2024-06-27 17:10:30,819 INFO L125 PetriNetUnfolderBase]: For 13883/13883 co-relation queries the response was YES. [2024-06-27 17:10:30,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9610 conditions, 1371 events. 698/1371 cut-off events. For 13883/13883 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 8031 event pairs, 191 based on Foata normal form. 15/1385 useless extension candidates. Maximal degree in co-relation 9540. Up to 1030 conditions per place. [2024-06-27 17:10:30,831 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 196 selfloop transitions, 79 changer transitions 0/276 dead transitions. [2024-06-27 17:10:30,831 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 276 transitions, 4413 flow [2024-06-27 17:10:30,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 17:10:30,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 17:10:30,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 96 transitions. [2024-06-27 17:10:30,832 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43636363636363634 [2024-06-27 17:10:30,833 INFO L175 Difference]: Start difference. First operand has 154 places, 242 transitions, 3595 flow. Second operand 11 states and 96 transitions. [2024-06-27 17:10:30,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 276 transitions, 4413 flow [2024-06-27 17:10:30,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 276 transitions, 4154 flow, removed 119 selfloop flow, removed 2 redundant places. [2024-06-27 17:10:30,893 INFO L231 Difference]: Finished difference. Result has 164 places, 244 transitions, 3541 flow [2024-06-27 17:10:30,893 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=3299, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3541, PETRI_PLACES=164, PETRI_TRANSITIONS=244} [2024-06-27 17:10:30,894 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 143 predicate places. [2024-06-27 17:10:30,894 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 244 transitions, 3541 flow [2024-06-27 17:10:30,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 11 states have internal predecessors, (56), 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 17:10:30,894 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:10:30,894 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:10:30,905 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 17:10:31,104 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 17:10:31,104 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 17:10:31,105 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:10:31,105 INFO L85 PathProgramCache]: Analyzing trace with hash 528022362, now seen corresponding path program 7 times [2024-06-27 17:10:31,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:10:31,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41996396] [2024-06-27 17:10:31,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:10:31,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:10:31,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:10:31,191 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:10:31,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:10:31,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41996396] [2024-06-27 17:10:31,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41996396] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:10:31,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397653842] [2024-06-27 17:10:31,192 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-06-27 17:10:31,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:10:31,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:10:31,194 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 17:10:31,217 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 17:10:31,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:10:31,261 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 9 conjunts are in the unsatisfiable core [2024-06-27 17:10:31,262 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:10:31,292 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:10:31,292 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:10:31,390 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:10:31,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397653842] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:10:31,391 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:10:31,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-06-27 17:10:31,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729224245] [2024-06-27 17:10:31,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:10:31,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 17:10:31,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:10:31,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 17:10:31,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2024-06-27 17:10:31,392 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-06-27 17:10:31,392 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 244 transitions, 3541 flow. Second operand has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 12 states have internal predecessors, (59), 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 17:10:31,393 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:10:31,393 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-06-27 17:10:31,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:10:31,892 INFO L124 PetriNetUnfolderBase]: 682/1351 cut-off events. [2024-06-27 17:10:31,892 INFO L125 PetriNetUnfolderBase]: For 13134/13134 co-relation queries the response was YES. [2024-06-27 17:10:31,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9343 conditions, 1351 events. 682/1351 cut-off events. For 13134/13134 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 7985 event pairs, 162 based on Foata normal form. 18/1368 useless extension candidates. Maximal degree in co-relation 9270. Up to 906 conditions per place. [2024-06-27 17:10:31,903 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 174 selfloop transitions, 111 changer transitions 2/288 dead transitions. [2024-06-27 17:10:31,903 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 288 transitions, 4436 flow [2024-06-27 17:10:31,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-06-27 17:10:31,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-06-27 17:10:31,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 137 transitions. [2024-06-27 17:10:31,905 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.428125 [2024-06-27 17:10:31,905 INFO L175 Difference]: Start difference. First operand has 164 places, 244 transitions, 3541 flow. Second operand 16 states and 137 transitions. [2024-06-27 17:10:31,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 288 transitions, 4436 flow [2024-06-27 17:10:31,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 288 transitions, 4362 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-27 17:10:31,955 INFO L231 Difference]: Finished difference. Result has 178 places, 245 transitions, 3771 flow [2024-06-27 17:10:31,955 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=3386, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=3771, PETRI_PLACES=178, PETRI_TRANSITIONS=245} [2024-06-27 17:10:31,955 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 157 predicate places. [2024-06-27 17:10:31,956 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 245 transitions, 3771 flow [2024-06-27 17:10:31,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 12 states have internal predecessors, (59), 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 17:10:31,956 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:10:31,956 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:10:31,968 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-06-27 17:10:32,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:10:32,157 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:10:32,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:10:32,158 INFO L85 PathProgramCache]: Analyzing trace with hash -262601428, now seen corresponding path program 8 times [2024-06-27 17:10:32,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:10:32,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446752774] [2024-06-27 17:10:32,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:10:32,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:10:32,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:10:32,250 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:10:32,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:10:32,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446752774] [2024-06-27 17:10:32,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446752774] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:10:32,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484488803] [2024-06-27 17:10:32,250 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 17:10:32,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:10:32,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:10:32,251 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:10:32,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-06-27 17:10:32,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 17:10:32,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:10:32,319 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 9 conjunts are in the unsatisfiable core [2024-06-27 17:10:32,320 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:10:32,364 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:10:32,364 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:10:32,426 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:10:32,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484488803] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:10:32,427 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:10:32,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-06-27 17:10:32,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709318031] [2024-06-27 17:10:32,427 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:10:32,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 17:10:32,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:10:32,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 17:10:32,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2024-06-27 17:10:32,428 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-06-27 17:10:32,428 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 245 transitions, 3771 flow. Second operand has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 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 17:10:32,428 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:10:32,428 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-06-27 17:10:32,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:10:33,015 INFO L124 PetriNetUnfolderBase]: 820/1626 cut-off events. [2024-06-27 17:10:33,016 INFO L125 PetriNetUnfolderBase]: For 19383/19383 co-relation queries the response was YES. [2024-06-27 17:10:33,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11674 conditions, 1626 events. 820/1626 cut-off events. For 19383/19383 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 9913 event pairs, 57 based on Foata normal form. 14/1639 useless extension candidates. Maximal degree in co-relation 11597. Up to 556 conditions per place. [2024-06-27 17:10:33,028 INFO L140 encePairwiseOnDemand]: 13/20 looper letters, 169 selfloop transitions, 189 changer transitions 1/360 dead transitions. [2024-06-27 17:10:33,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 360 transitions, 5822 flow [2024-06-27 17:10:33,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-06-27 17:10:33,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-06-27 17:10:33,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 178 transitions. [2024-06-27 17:10:33,030 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46842105263157896 [2024-06-27 17:10:33,030 INFO L175 Difference]: Start difference. First operand has 178 places, 245 transitions, 3771 flow. Second operand 19 states and 178 transitions. [2024-06-27 17:10:33,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 360 transitions, 5822 flow [2024-06-27 17:10:33,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 360 transitions, 5677 flow, removed 18 selfloop flow, removed 8 redundant places. [2024-06-27 17:10:33,095 INFO L231 Difference]: Finished difference. Result has 196 places, 283 transitions, 4807 flow [2024-06-27 17:10:33,096 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=3616, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=4807, PETRI_PLACES=196, PETRI_TRANSITIONS=283} [2024-06-27 17:10:33,096 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 175 predicate places. [2024-06-27 17:10:33,096 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 283 transitions, 4807 flow [2024-06-27 17:10:33,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 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 17:10:33,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:10:33,097 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:10:33,110 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-06-27 17:10:33,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:10:33,299 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:10:33,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:10:33,300 INFO L85 PathProgramCache]: Analyzing trace with hash -341249668, now seen corresponding path program 9 times [2024-06-27 17:10:33,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:10:33,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107027316] [2024-06-27 17:10:33,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:10:33,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:10:33,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:10:33,391 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:10:33,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:10:33,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107027316] [2024-06-27 17:10:33,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107027316] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:10:33,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135472872] [2024-06-27 17:10:33,391 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 17:10:33,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:10:33,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:10:33,409 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:10:33,433 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-06-27 17:10:33,480 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-06-27 17:10:33,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:10:33,481 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 9 conjunts are in the unsatisfiable core [2024-06-27 17:10:33,482 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:10:33,529 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:10:33,529 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:10:33,588 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:10:33,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135472872] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:10:33,588 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:10:33,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-06-27 17:10:33,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182213060] [2024-06-27 17:10:33,589 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:10:33,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 17:10:33,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:10:33,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 17:10:33,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2024-06-27 17:10:33,589 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-06-27 17:10:33,590 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 283 transitions, 4807 flow. Second operand has 13 states, 13 states have (on average 5.0) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:10:33,590 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:10:33,590 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-06-27 17:10:33,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:10:34,140 INFO L124 PetriNetUnfolderBase]: 844/1670 cut-off events. [2024-06-27 17:10:34,140 INFO L125 PetriNetUnfolderBase]: For 24483/24483 co-relation queries the response was YES. [2024-06-27 17:10:34,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12993 conditions, 1670 events. 844/1670 cut-off events. For 24483/24483 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 10192 event pairs, 68 based on Foata normal form. 9/1678 useless extension candidates. Maximal degree in co-relation 12908. Up to 625 conditions per place. [2024-06-27 17:10:34,153 INFO L140 encePairwiseOnDemand]: 13/20 looper letters, 157 selfloop transitions, 183 changer transitions 0/341 dead transitions. [2024-06-27 17:10:34,154 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 341 transitions, 6128 flow [2024-06-27 17:10:34,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-06-27 17:10:34,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-06-27 17:10:34,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 140 transitions. [2024-06-27 17:10:34,155 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-27 17:10:34,155 INFO L175 Difference]: Start difference. First operand has 196 places, 283 transitions, 4807 flow. Second operand 16 states and 140 transitions. [2024-06-27 17:10:34,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 341 transitions, 6128 flow [2024-06-27 17:10:34,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 341 transitions, 5971 flow, removed 55 selfloop flow, removed 5 redundant places. [2024-06-27 17:10:34,241 INFO L231 Difference]: Finished difference. Result has 210 places, 290 transitions, 5317 flow [2024-06-27 17:10:34,242 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=4602, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=5317, PETRI_PLACES=210, PETRI_TRANSITIONS=290} [2024-06-27 17:10:34,242 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 189 predicate places. [2024-06-27 17:10:34,242 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 290 transitions, 5317 flow [2024-06-27 17:10:34,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.0) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:10:34,242 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:10:34,243 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 17:10:34,254 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-06-27 17:10:34,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:10:34,454 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:10:34,454 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:10:34,454 INFO L85 PathProgramCache]: Analyzing trace with hash -1100359369, now seen corresponding path program 1 times [2024-06-27 17:10:34,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:10:34,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60936528] [2024-06-27 17:10:34,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:10:34,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:10:34,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:10:34,573 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:10:34,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:10:34,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60936528] [2024-06-27 17:10:34,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60936528] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:10:34,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000218148] [2024-06-27 17:10:34,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:10:34,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:10:34,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:10:34,575 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:10:34,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-06-27 17:10:34,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:10:34,655 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 12 conjunts are in the unsatisfiable core [2024-06-27 17:10:34,656 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:10:34,714 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:10:34,714 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:10:34,845 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:10:34,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000218148] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:10:34,846 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:10:34,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 12 [2024-06-27 17:10:34,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666410141] [2024-06-27 17:10:34,846 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:10:34,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 17:10:34,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:10:34,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 17:10:34,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2024-06-27 17:10:34,847 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-06-27 17:10:34,848 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 290 transitions, 5317 flow. Second operand has 12 states, 12 states have (on average 5.25) internal successors, (63), 12 states have internal predecessors, (63), 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 17:10:34,848 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:10:34,848 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-06-27 17:10:34,848 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:10:35,465 INFO L124 PetriNetUnfolderBase]: 754/1532 cut-off events. [2024-06-27 17:10:35,465 INFO L125 PetriNetUnfolderBase]: For 26482/26482 co-relation queries the response was YES. [2024-06-27 17:10:35,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12350 conditions, 1532 events. 754/1532 cut-off events. For 26482/26482 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 9389 event pairs, 89 based on Foata normal form. 51/1582 useless extension candidates. Maximal degree in co-relation 12262. Up to 392 conditions per place. [2024-06-27 17:10:35,477 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 155 selfloop transitions, 168 changer transitions 10/334 dead transitions. [2024-06-27 17:10:35,477 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 334 transitions, 6360 flow [2024-06-27 17:10:35,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 17:10:35,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 17:10:35,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 106 transitions. [2024-06-27 17:10:35,478 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44166666666666665 [2024-06-27 17:10:35,478 INFO L175 Difference]: Start difference. First operand has 210 places, 290 transitions, 5317 flow. Second operand 12 states and 106 transitions. [2024-06-27 17:10:35,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 334 transitions, 6360 flow [2024-06-27 17:10:35,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 334 transitions, 6249 flow, removed 17 selfloop flow, removed 8 redundant places. [2024-06-27 17:10:35,572 INFO L231 Difference]: Finished difference. Result has 214 places, 291 transitions, 5614 flow [2024-06-27 17:10:35,573 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=4890, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5614, PETRI_PLACES=214, PETRI_TRANSITIONS=291} [2024-06-27 17:10:35,573 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 193 predicate places. [2024-06-27 17:10:35,573 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 291 transitions, 5614 flow [2024-06-27 17:10:35,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 12 states have internal predecessors, (63), 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 17:10:35,573 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:10:35,574 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:10:35,590 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-06-27 17:10:35,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:10:35,785 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:10:35,786 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:10:35,786 INFO L85 PathProgramCache]: Analyzing trace with hash 461833712, now seen corresponding path program 10 times [2024-06-27 17:10:35,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:10:35,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987240565] [2024-06-27 17:10:35,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:10:35,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:10:35,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:10:35,884 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:10:35,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:10:35,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987240565] [2024-06-27 17:10:35,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987240565] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:10:35,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308251211] [2024-06-27 17:10:35,885 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 17:10:35,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:10:35,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:10:35,886 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:10:35,902 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-06-27 17:10:35,963 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 17:10:35,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:10:35,964 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 11 conjunts are in the unsatisfiable core [2024-06-27 17:10:35,964 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:10:35,997 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:10:35,997 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:10:36,075 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:10:36,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308251211] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:10:36,076 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:10:36,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2024-06-27 17:10:36,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159114168] [2024-06-27 17:10:36,076 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:10:36,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 17:10:36,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:10:36,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 17:10:36,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2024-06-27 17:10:36,077 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-06-27 17:10:36,077 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 291 transitions, 5614 flow. Second operand has 13 states, 13 states have (on average 5.0) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:10:36,077 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:10:36,077 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-06-27 17:10:36,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:10:37,061 INFO L124 PetriNetUnfolderBase]: 752/1524 cut-off events. [2024-06-27 17:10:37,061 INFO L125 PetriNetUnfolderBase]: For 25631/25631 co-relation queries the response was YES. [2024-06-27 17:10:37,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12830 conditions, 1524 events. 752/1524 cut-off events. For 25631/25631 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 9289 event pairs, 84 based on Foata normal form. 12/1535 useless extension candidates. Maximal degree in co-relation 12742. Up to 392 conditions per place. [2024-06-27 17:10:37,074 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 166 selfloop transitions, 177 changer transitions 2/346 dead transitions. [2024-06-27 17:10:37,074 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 346 transitions, 6676 flow [2024-06-27 17:10:37,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-06-27 17:10:37,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-06-27 17:10:37,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 143 transitions. [2024-06-27 17:10:37,075 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3972222222222222 [2024-06-27 17:10:37,076 INFO L175 Difference]: Start difference. First operand has 214 places, 291 transitions, 5614 flow. Second operand 18 states and 143 transitions. [2024-06-27 17:10:37,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 346 transitions, 6676 flow [2024-06-27 17:10:37,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 346 transitions, 6420 flow, removed 37 selfloop flow, removed 7 redundant places. [2024-06-27 17:10:37,184 INFO L231 Difference]: Finished difference. Result has 225 places, 295 transitions, 5787 flow [2024-06-27 17:10:37,184 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=5358, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=5787, PETRI_PLACES=225, PETRI_TRANSITIONS=295} [2024-06-27 17:10:37,185 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 204 predicate places. [2024-06-27 17:10:37,185 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 295 transitions, 5787 flow [2024-06-27 17:10:37,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.0) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:10:37,185 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:10:37,185 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:10:37,210 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-06-27 17:10:37,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:10:37,408 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:10:37,409 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:10:37,409 INFO L85 PathProgramCache]: Analyzing trace with hash 1028099148, now seen corresponding path program 8 times [2024-06-27 17:10:37,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:10:37,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791997138] [2024-06-27 17:10:37,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:10:37,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:10:37,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:10:37,518 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:10:37,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:10:37,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791997138] [2024-06-27 17:10:37,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791997138] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:10:37,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132112170] [2024-06-27 17:10:37,519 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 17:10:37,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:10:37,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:10:37,520 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:10:37,523 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-06-27 17:10:37,595 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 17:10:37,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:10:37,596 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 10 conjunts are in the unsatisfiable core [2024-06-27 17:10:37,597 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:10:37,633 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:10:37,634 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:10:37,706 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:10:37,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132112170] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:10:37,707 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:10:37,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 5] total 12 [2024-06-27 17:10:37,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899141710] [2024-06-27 17:10:37,707 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:10:37,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 17:10:37,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:10:37,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 17:10:37,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2024-06-27 17:10:37,708 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-06-27 17:10:37,709 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 295 transitions, 5787 flow. Second operand has 12 states, 12 states have (on average 5.5) internal successors, (66), 12 states have internal predecessors, (66), 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 17:10:37,709 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:10:37,709 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-06-27 17:10:37,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:10:40,401 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.43s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-06-27 17:10:40,676 INFO L124 PetriNetUnfolderBase]: 777/1634 cut-off events. [2024-06-27 17:10:40,676 INFO L125 PetriNetUnfolderBase]: For 26458/26458 co-relation queries the response was YES. [2024-06-27 17:10:40,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13424 conditions, 1634 events. 777/1634 cut-off events. For 26458/26458 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 10462 event pairs, 142 based on Foata normal form. 5/1638 useless extension candidates. Maximal degree in co-relation 13332. Up to 741 conditions per place. [2024-06-27 17:10:40,692 INFO L140 encePairwiseOnDemand]: 13/20 looper letters, 222 selfloop transitions, 124 changer transitions 4/351 dead transitions. [2024-06-27 17:10:40,692 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 351 transitions, 7009 flow [2024-06-27 17:10:40,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 17:10:40,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 17:10:40,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 122 transitions. [2024-06-27 17:10:40,693 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5083333333333333 [2024-06-27 17:10:40,693 INFO L175 Difference]: Start difference. First operand has 225 places, 295 transitions, 5787 flow. Second operand 12 states and 122 transitions. [2024-06-27 17:10:40,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 351 transitions, 7009 flow [2024-06-27 17:10:40,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 351 transitions, 6650 flow, removed 18 selfloop flow, removed 8 redundant places. [2024-06-27 17:10:40,799 INFO L231 Difference]: Finished difference. Result has 233 places, 311 transitions, 6095 flow [2024-06-27 17:10:40,799 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=5432, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6095, PETRI_PLACES=233, PETRI_TRANSITIONS=311} [2024-06-27 17:10:40,800 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 212 predicate places. [2024-06-27 17:10:40,800 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 311 transitions, 6095 flow [2024-06-27 17:10:40,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.5) internal successors, (66), 12 states have internal predecessors, (66), 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 17:10:40,800 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:10:40,800 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:10:40,814 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-06-27 17:10:41,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:10:41,006 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:10:41,007 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:10:41,007 INFO L85 PathProgramCache]: Analyzing trace with hash -1942619772, now seen corresponding path program 9 times [2024-06-27 17:10:41,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:10:41,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552623461] [2024-06-27 17:10:41,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:10:41,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:10:41,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:10:41,093 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:10:41,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:10:41,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552623461] [2024-06-27 17:10:41,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552623461] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:10:41,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167007253] [2024-06-27 17:10:41,093 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 17:10:41,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:10:41,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:10:41,095 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:10:41,117 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-06-27 17:10:41,179 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-06-27 17:10:41,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:10:41,181 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 9 conjunts are in the unsatisfiable core [2024-06-27 17:10:41,181 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:10:41,203 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:10:41,203 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:10:41,273 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:10:41,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167007253] provided 1 perfect and 1 imperfect interpolant sequences [2024-06-27 17:10:41,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-06-27 17:10:41,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 6] total 9 [2024-06-27 17:10:41,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712497513] [2024-06-27 17:10:41,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:10:41,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:10:41,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:10:41,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:10:41,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 17:10:41,275 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-06-27 17:10:41,275 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 311 transitions, 6095 flow. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 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 17:10:41,276 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:10:41,276 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-06-27 17:10:41,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:10:42,556 INFO L124 PetriNetUnfolderBase]: 771/1621 cut-off events. [2024-06-27 17:10:42,556 INFO L125 PetriNetUnfolderBase]: For 27880/27880 co-relation queries the response was YES. [2024-06-27 17:10:42,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13464 conditions, 1621 events. 771/1621 cut-off events. For 27880/27880 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 10336 event pairs, 178 based on Foata normal form. 4/1624 useless extension candidates. Maximal degree in co-relation 13368. Up to 832 conditions per place. [2024-06-27 17:10:42,569 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 274 selfloop transitions, 56 changer transitions 2/333 dead transitions. [2024-06-27 17:10:42,569 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 333 transitions, 7106 flow [2024-06-27 17:10:42,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:10:42,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:10:42,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 54 transitions. [2024-06-27 17:10:42,570 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-27 17:10:42,570 INFO L175 Difference]: Start difference. First operand has 233 places, 311 transitions, 6095 flow. Second operand 6 states and 54 transitions. [2024-06-27 17:10:42,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 333 transitions, 7106 flow [2024-06-27 17:10:42,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 333 transitions, 6973 flow, removed 23 selfloop flow, removed 3 redundant places. [2024-06-27 17:10:42,682 INFO L231 Difference]: Finished difference. Result has 237 places, 310 transitions, 6121 flow [2024-06-27 17:10:42,682 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=5948, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6121, PETRI_PLACES=237, PETRI_TRANSITIONS=310} [2024-06-27 17:10:42,683 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 216 predicate places. [2024-06-27 17:10:42,683 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 310 transitions, 6121 flow [2024-06-27 17:10:42,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 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 17:10:42,683 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:10:42,683 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:10:42,696 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-06-27 17:10:42,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-06-27 17:10:42,884 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:10:42,884 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:10:42,884 INFO L85 PathProgramCache]: Analyzing trace with hash 1930348464, now seen corresponding path program 10 times [2024-06-27 17:10:42,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:10:42,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147854280] [2024-06-27 17:10:42,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:10:42,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:10:42,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:10:43,013 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:10:43,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:10:43,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147854280] [2024-06-27 17:10:43,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147854280] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:10:43,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029318105] [2024-06-27 17:10:43,013 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 17:10:43,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:10:43,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:10:43,014 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:10:43,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-06-27 17:10:43,091 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 17:10:43,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:10:43,092 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 9 conjunts are in the unsatisfiable core [2024-06-27 17:10:43,092 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:10:43,121 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:10:43,122 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:10:43,184 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:10:43,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029318105] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:10:43,184 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:10:43,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 5] total 12 [2024-06-27 17:10:43,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772922287] [2024-06-27 17:10:43,185 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:10:43,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 17:10:43,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:10:43,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 17:10:43,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2024-06-27 17:10:43,188 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-06-27 17:10:43,188 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 310 transitions, 6121 flow. Second operand has 12 states, 12 states have (on average 5.25) internal successors, (63), 12 states have internal predecessors, (63), 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 17:10:43,188 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:10:43,188 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-06-27 17:10:43,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:10:43,807 INFO L124 PetriNetUnfolderBase]: 784/1652 cut-off events. [2024-06-27 17:10:43,807 INFO L125 PetriNetUnfolderBase]: For 30812/30812 co-relation queries the response was YES. [2024-06-27 17:10:43,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13796 conditions, 1652 events. 784/1652 cut-off events. For 30812/30812 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 10579 event pairs, 149 based on Foata normal form. 2/1653 useless extension candidates. Maximal degree in co-relation 13697. Up to 565 conditions per place. [2024-06-27 17:10:43,819 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 260 selfloop transitions, 95 changer transitions 2/358 dead transitions. [2024-06-27 17:10:43,819 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 358 transitions, 7360 flow [2024-06-27 17:10:43,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-27 17:10:43,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-27 17:10:43,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 123 transitions. [2024-06-27 17:10:43,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41 [2024-06-27 17:10:43,820 INFO L175 Difference]: Start difference. First operand has 237 places, 310 transitions, 6121 flow. Second operand 15 states and 123 transitions. [2024-06-27 17:10:43,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 358 transitions, 7360 flow [2024-06-27 17:10:43,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 358 transitions, 7109 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-27 17:10:43,931 INFO L231 Difference]: Finished difference. Result has 245 places, 308 transitions, 6024 flow [2024-06-27 17:10:43,932 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=5845, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=6024, PETRI_PLACES=245, PETRI_TRANSITIONS=308} [2024-06-27 17:10:43,932 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 224 predicate places. [2024-06-27 17:10:43,932 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 308 transitions, 6024 flow [2024-06-27 17:10:43,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 12 states have internal predecessors, (63), 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 17:10:43,932 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:10:43,933 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:10:43,943 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-06-27 17:10:44,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-06-27 17:10:44,134 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:10:44,135 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:10:44,135 INFO L85 PathProgramCache]: Analyzing trace with hash 1372769990, now seen corresponding path program 11 times [2024-06-27 17:10:44,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:10:44,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333420474] [2024-06-27 17:10:44,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:10:44,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:10:44,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:10:44,221 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:10:44,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:10:44,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333420474] [2024-06-27 17:10:44,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333420474] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:10:44,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680766486] [2024-06-27 17:10:44,222 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-27 17:10:44,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:10:44,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:10:44,223 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:10:44,246 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-06-27 17:10:44,297 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 17:10:44,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:10:44,298 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 11 conjunts are in the unsatisfiable core [2024-06-27 17:10:44,298 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:10:44,332 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:10:44,332 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:10:44,425 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:10:44,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680766486] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:10:44,426 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:10:44,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2024-06-27 17:10:44,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55010855] [2024-06-27 17:10:44,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:10:44,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-27 17:10:44,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:10:44,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-27 17:10:44,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2024-06-27 17:10:44,428 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-06-27 17:10:44,428 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 308 transitions, 6024 flow. Second operand has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 states have internal predecessors, (69), 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 17:10:44,428 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:10:44,428 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-06-27 17:10:44,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:10:45,135 INFO L124 PetriNetUnfolderBase]: 788/1666 cut-off events. [2024-06-27 17:10:45,135 INFO L125 PetriNetUnfolderBase]: For 29476/29476 co-relation queries the response was YES. [2024-06-27 17:10:45,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13806 conditions, 1666 events. 788/1666 cut-off events. For 29476/29476 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 10739 event pairs, 99 based on Foata normal form. 15/1680 useless extension candidates. Maximal degree in co-relation 13708. Up to 465 conditions per place. [2024-06-27 17:10:45,147 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 186 selfloop transitions, 171 changer transitions 1/359 dead transitions. [2024-06-27 17:10:45,147 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 359 transitions, 7053 flow [2024-06-27 17:10:45,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-06-27 17:10:45,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-06-27 17:10:45,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 150 transitions. [2024-06-27 17:10:45,148 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-27 17:10:45,149 INFO L175 Difference]: Start difference. First operand has 245 places, 308 transitions, 6024 flow. Second operand 18 states and 150 transitions. [2024-06-27 17:10:45,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 359 transitions, 7053 flow [2024-06-27 17:10:45,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 359 transitions, 6858 flow, removed 9 selfloop flow, removed 10 redundant places. [2024-06-27 17:10:45,253 INFO L231 Difference]: Finished difference. Result has 251 places, 312 transitions, 6248 flow [2024-06-27 17:10:45,254 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=5811, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=168, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=6248, PETRI_PLACES=251, PETRI_TRANSITIONS=312} [2024-06-27 17:10:45,254 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 230 predicate places. [2024-06-27 17:10:45,254 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 312 transitions, 6248 flow [2024-06-27 17:10:45,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 states have internal predecessors, (69), 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 17:10:45,254 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:10:45,254 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:10:45,265 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-06-27 17:10:45,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-06-27 17:10:45,455 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:10:45,455 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:10:45,455 INFO L85 PathProgramCache]: Analyzing trace with hash -649237018, now seen corresponding path program 11 times [2024-06-27 17:10:45,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:10:45,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028843397] [2024-06-27 17:10:45,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:10:45,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:10:45,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:10:45,535 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:10:45,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:10:45,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028843397] [2024-06-27 17:10:45,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028843397] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:10:45,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559416268] [2024-06-27 17:10:45,536 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-27 17:10:45,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:10:45,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:10:45,537 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:10:45,552 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-06-27 17:10:45,614 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 17:10:45,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:10:45,615 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 12 conjunts are in the unsatisfiable core [2024-06-27 17:10:45,615 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:10:45,637 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:10:45,637 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:10:45,712 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:10:45,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [559416268] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:10:45,712 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:10:45,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 12 [2024-06-27 17:10:45,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344062812] [2024-06-27 17:10:45,712 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:10:45,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 17:10:45,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:10:45,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 17:10:45,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2024-06-27 17:10:45,713 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-06-27 17:10:45,713 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 312 transitions, 6248 flow. Second operand has 12 states, 12 states have (on average 5.0) internal successors, (60), 12 states have internal predecessors, (60), 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 17:10:45,713 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:10:45,713 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-06-27 17:10:45,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:10:46,149 INFO L124 PetriNetUnfolderBase]: 785/1665 cut-off events. [2024-06-27 17:10:46,149 INFO L125 PetriNetUnfolderBase]: For 30593/30593 co-relation queries the response was YES. [2024-06-27 17:10:46,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14005 conditions, 1665 events. 785/1665 cut-off events. For 30593/30593 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 10785 event pairs, 177 based on Foata normal form. 6/1670 useless extension candidates. Maximal degree in co-relation 13905. Up to 851 conditions per place. [2024-06-27 17:10:46,163 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 268 selfloop transitions, 64 changer transitions 9/342 dead transitions. [2024-06-27 17:10:46,163 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 342 transitions, 7384 flow [2024-06-27 17:10:46,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:10:46,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:10:46,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 73 transitions. [2024-06-27 17:10:46,166 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40555555555555556 [2024-06-27 17:10:46,166 INFO L175 Difference]: Start difference. First operand has 251 places, 312 transitions, 6248 flow. Second operand 9 states and 73 transitions. [2024-06-27 17:10:46,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 342 transitions, 7384 flow [2024-06-27 17:10:46,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 342 transitions, 7106 flow, removed 20 selfloop flow, removed 11 redundant places. [2024-06-27 17:10:46,286 INFO L231 Difference]: Finished difference. Result has 250 places, 309 transitions, 6057 flow [2024-06-27 17:10:46,286 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=5940, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6057, PETRI_PLACES=250, PETRI_TRANSITIONS=309} [2024-06-27 17:10:46,287 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 229 predicate places. [2024-06-27 17:10:46,287 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 309 transitions, 6057 flow [2024-06-27 17:10:46,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.0) internal successors, (60), 12 states have internal predecessors, (60), 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 17:10:46,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:10:46,287 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:10:46,298 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-06-27 17:10:46,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:10:46,498 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:10:46,498 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:10:46,498 INFO L85 PathProgramCache]: Analyzing trace with hash 795958468, now seen corresponding path program 12 times [2024-06-27 17:10:46,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:10:46,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131715526] [2024-06-27 17:10:46,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:10:46,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:10:46,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:10:46,623 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:10:46,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:10:46,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131715526] [2024-06-27 17:10:46,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131715526] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:10:46,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635567362] [2024-06-27 17:10:46,624 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-27 17:10:46,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:10:46,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:10:46,625 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:10:46,640 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-06-27 17:10:46,730 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-06-27 17:10:46,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:10:46,731 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 12 conjunts are in the unsatisfiable core [2024-06-27 17:10:46,732 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:10:46,763 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:10:46,763 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:10:46,897 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:10:46,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635567362] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:10:46,898 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:10:46,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 14 [2024-06-27 17:10:46,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618106103] [2024-06-27 17:10:46,898 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:10:46,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-27 17:10:46,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:10:46,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-27 17:10:46,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2024-06-27 17:10:46,899 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-06-27 17:10:46,899 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 309 transitions, 6057 flow. Second operand has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 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 17:10:46,899 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:10:46,899 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-06-27 17:10:46,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:10:47,943 INFO L124 PetriNetUnfolderBase]: 826/1738 cut-off events. [2024-06-27 17:10:47,943 INFO L125 PetriNetUnfolderBase]: For 35645/35645 co-relation queries the response was YES. [2024-06-27 17:10:47,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14360 conditions, 1738 events. 826/1738 cut-off events. For 35645/35645 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 11277 event pairs, 157 based on Foata normal form. 26/1763 useless extension candidates. Maximal degree in co-relation 14259. Up to 871 conditions per place. [2024-06-27 17:10:47,958 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 274 selfloop transitions, 89 changer transitions 2/366 dead transitions. [2024-06-27 17:10:47,958 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 366 transitions, 7567 flow [2024-06-27 17:10:47,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-27 17:10:47,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-27 17:10:47,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 120 transitions. [2024-06-27 17:10:47,959 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-27 17:10:47,960 INFO L175 Difference]: Start difference. First operand has 250 places, 309 transitions, 6057 flow. Second operand 15 states and 120 transitions. [2024-06-27 17:10:47,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 366 transitions, 7567 flow [2024-06-27 17:10:48,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 366 transitions, 7447 flow, removed 35 selfloop flow, removed 4 redundant places. [2024-06-27 17:10:48,078 INFO L231 Difference]: Finished difference. Result has 257 places, 314 transitions, 6369 flow [2024-06-27 17:10:48,078 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=5859, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=6369, PETRI_PLACES=257, PETRI_TRANSITIONS=314} [2024-06-27 17:10:48,078 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 236 predicate places. [2024-06-27 17:10:48,078 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 314 transitions, 6369 flow [2024-06-27 17:10:48,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 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 17:10:48,079 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:10:48,079 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:10:48,089 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-06-27 17:10:48,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-06-27 17:10:48,282 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:10:48,283 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:10:48,283 INFO L85 PathProgramCache]: Analyzing trace with hash 1576779404, now seen corresponding path program 13 times [2024-06-27 17:10:48,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:10:48,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962361691] [2024-06-27 17:10:48,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:10:48,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:10:48,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:10:48,383 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:10:48,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:10:48,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962361691] [2024-06-27 17:10:48,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962361691] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:10:48,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975484497] [2024-06-27 17:10:48,384 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-06-27 17:10:48,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:10:48,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:10:48,385 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:10:48,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-06-27 17:10:48,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:10:48,468 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 12 conjunts are in the unsatisfiable core [2024-06-27 17:10:48,468 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:10:48,512 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:10:48,512 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:10:48,635 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:10:48,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975484497] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:10:48,635 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:10:48,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-06-27 17:10:48,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88894385] [2024-06-27 17:10:48,635 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:10:48,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-06-27 17:10:48,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:10:48,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-06-27 17:10:48,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2024-06-27 17:10:48,636 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-06-27 17:10:48,637 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 314 transitions, 6369 flow. Second operand has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 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 17:10:48,637 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:10:48,637 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-06-27 17:10:48,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:10:49,304 INFO L124 PetriNetUnfolderBase]: 865/1818 cut-off events. [2024-06-27 17:10:49,304 INFO L125 PetriNetUnfolderBase]: For 36855/36855 co-relation queries the response was YES. [2024-06-27 17:10:49,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15449 conditions, 1818 events. 865/1818 cut-off events. For 36855/36855 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 11937 event pairs, 216 based on Foata normal form. 15/1832 useless extension candidates. Maximal degree in co-relation 15349. Up to 1128 conditions per place. [2024-06-27 17:10:49,320 INFO L140 encePairwiseOnDemand]: 13/20 looper letters, 253 selfloop transitions, 116 changer transitions 0/370 dead transitions. [2024-06-27 17:10:49,320 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 370 transitions, 7696 flow [2024-06-27 17:10:49,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-06-27 17:10:49,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-06-27 17:10:49,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 154 transitions. [2024-06-27 17:10:49,321 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42777777777777776 [2024-06-27 17:10:49,321 INFO L175 Difference]: Start difference. First operand has 257 places, 314 transitions, 6369 flow. Second operand 18 states and 154 transitions. [2024-06-27 17:10:49,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 370 transitions, 7696 flow [2024-06-27 17:10:49,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 370 transitions, 7293 flow, removed 73 selfloop flow, removed 18 redundant places. [2024-06-27 17:10:49,456 INFO L231 Difference]: Finished difference. Result has 257 places, 328 transitions, 6703 flow [2024-06-27 17:10:49,456 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=5978, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=6703, PETRI_PLACES=257, PETRI_TRANSITIONS=328} [2024-06-27 17:10:49,457 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 236 predicate places. [2024-06-27 17:10:49,457 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 328 transitions, 6703 flow [2024-06-27 17:10:49,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 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 17:10:49,457 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:10:49,457 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:10:49,468 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-06-27 17:10:49,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-06-27 17:10:49,659 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:10:49,659 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:10:49,659 INFO L85 PathProgramCache]: Analyzing trace with hash -1921933677, now seen corresponding path program 2 times [2024-06-27 17:10:49,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:10:49,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505719971] [2024-06-27 17:10:49,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:10:49,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:10:49,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:10:49,846 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:10:49,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:10:49,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505719971] [2024-06-27 17:10:49,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505719971] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:10:49,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715161266] [2024-06-27 17:10:49,847 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 17:10:49,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:10:49,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:10:49,848 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:10:49,871 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-06-27 17:10:49,944 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 17:10:49,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:10:49,945 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 12 conjunts are in the unsatisfiable core [2024-06-27 17:10:49,946 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:10:50,040 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:10:50,041 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:10:50,173 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:10:50,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715161266] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:10:50,173 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:10:50,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 15 [2024-06-27 17:10:50,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648884634] [2024-06-27 17:10:50,173 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:10:50,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-06-27 17:10:50,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:10:50,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-06-27 17:10:50,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2024-06-27 17:10:50,174 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-06-27 17:10:50,174 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 328 transitions, 6703 flow. Second operand has 15 states, 15 states have (on average 5.0) internal successors, (75), 15 states have internal predecessors, (75), 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 17:10:50,174 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:10:50,174 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-06-27 17:10:50,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:10:51,993 INFO L124 PetriNetUnfolderBase]: 1656/3606 cut-off events. [2024-06-27 17:10:51,993 INFO L125 PetriNetUnfolderBase]: For 75770/75770 co-relation queries the response was YES. [2024-06-27 17:10:52,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29860 conditions, 3606 events. 1656/3606 cut-off events. For 75770/75770 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 28069 event pairs, 145 based on Foata normal form. 74/3679 useless extension candidates. Maximal degree in co-relation 29762. Up to 926 conditions per place. [2024-06-27 17:10:52,028 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 295 selfloop transitions, 305 changer transitions 1/602 dead transitions. [2024-06-27 17:10:52,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 602 transitions, 12539 flow [2024-06-27 17:10:52,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-06-27 17:10:52,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-06-27 17:10:52,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 253 transitions. [2024-06-27 17:10:52,030 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4685185185185185 [2024-06-27 17:10:52,030 INFO L175 Difference]: Start difference. First operand has 257 places, 328 transitions, 6703 flow. Second operand 27 states and 253 transitions. [2024-06-27 17:10:52,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 602 transitions, 12539 flow [2024-06-27 17:10:52,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 602 transitions, 12340 flow, removed 50 selfloop flow, removed 8 redundant places. [2024-06-27 17:10:52,313 INFO L231 Difference]: Finished difference. Result has 289 places, 489 transitions, 11218 flow [2024-06-27 17:10:52,313 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=6532, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=327, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=190, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=11218, PETRI_PLACES=289, PETRI_TRANSITIONS=489} [2024-06-27 17:10:52,313 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 268 predicate places. [2024-06-27 17:10:52,313 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 489 transitions, 11218 flow [2024-06-27 17:10:52,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.0) internal successors, (75), 15 states have internal predecessors, (75), 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 17:10:52,314 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:10:52,314 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:10:52,324 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2024-06-27 17:10:52,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:10:52,514 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:10:52,514 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:10:52,515 INFO L85 PathProgramCache]: Analyzing trace with hash -1708652226, now seen corresponding path program 3 times [2024-06-27 17:10:52,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:10:52,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244502609] [2024-06-27 17:10:52,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:10:52,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:10:52,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:10:53,247 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:10:53,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:10:53,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244502609] [2024-06-27 17:10:53,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244502609] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:10:53,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502786037] [2024-06-27 17:10:53,248 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 17:10:53,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:10:53,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:10:53,249 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:10:53,250 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-06-27 17:10:53,313 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-06-27 17:10:53,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:10:53,314 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 33 conjunts are in the unsatisfiable core [2024-06-27 17:10:53,315 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:10:53,544 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:10:53,545 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 20 [2024-06-27 17:10:53,548 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 17:10:53,548 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:10:53,808 INFO L349 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2024-06-27 17:10:53,808 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2024-06-27 17:10:53,875 INFO L349 Elim1Store]: treesize reduction 74, result has 29.5 percent of original size [2024-06-27 17:10:53,876 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 61 [2024-06-27 17:10:53,919 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:10:53,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [502786037] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:10:53,920 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:10:53,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 8] total 27 [2024-06-27 17:10:53,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120262925] [2024-06-27 17:10:53,920 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:10:53,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-06-27 17:10:53,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:10:53,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-06-27 17:10:53,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=667, Unknown=0, NotChecked=0, Total=756 [2024-06-27 17:10:53,924 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-06-27 17:10:53,925 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 489 transitions, 11218 flow. Second operand has 28 states, 28 states have (on average 4.75) internal successors, (133), 28 states have internal predecessors, (133), 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 17:10:53,925 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:10:53,925 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-06-27 17:10:53,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:10:55,616 INFO L124 PetriNetUnfolderBase]: 1719/3729 cut-off events. [2024-06-27 17:10:55,617 INFO L125 PetriNetUnfolderBase]: For 94963/94963 co-relation queries the response was YES. [2024-06-27 17:10:55,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34795 conditions, 3729 events. 1719/3729 cut-off events. For 94963/94963 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 28914 event pairs, 144 based on Foata normal form. 8/3735 useless extension candidates. Maximal degree in co-relation 34608. Up to 3196 conditions per place. [2024-06-27 17:10:55,655 INFO L140 encePairwiseOnDemand]: 9/20 looper letters, 473 selfloop transitions, 110 changer transitions 9/593 dead transitions. [2024-06-27 17:10:55,655 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 593 transitions, 13760 flow [2024-06-27 17:10:55,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-06-27 17:10:55,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-06-27 17:10:55,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 196 transitions. [2024-06-27 17:10:55,656 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4260869565217391 [2024-06-27 17:10:55,656 INFO L175 Difference]: Start difference. First operand has 289 places, 489 transitions, 11218 flow. Second operand 23 states and 196 transitions. [2024-06-27 17:10:55,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 593 transitions, 13760 flow [2024-06-27 17:10:56,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 593 transitions, 12857 flow, removed 288 selfloop flow, removed 8 redundant places. [2024-06-27 17:10:56,035 INFO L231 Difference]: Finished difference. Result has 310 places, 525 transitions, 11384 flow [2024-06-27 17:10:56,035 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=10398, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=489, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=401, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=11384, PETRI_PLACES=310, PETRI_TRANSITIONS=525} [2024-06-27 17:10:56,036 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 289 predicate places. [2024-06-27 17:10:56,036 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 525 transitions, 11384 flow [2024-06-27 17:10:56,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 4.75) internal successors, (133), 28 states have internal predecessors, (133), 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 17:10:56,036 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:10:56,036 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:10:56,049 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2024-06-27 17:10:56,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:10:56,244 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:10:56,245 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:10:56,245 INFO L85 PathProgramCache]: Analyzing trace with hash -940336466, now seen corresponding path program 4 times [2024-06-27 17:10:56,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:10:56,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385004190] [2024-06-27 17:10:56,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:10:56,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:10:56,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:10:56,990 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:10:56,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:10:56,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385004190] [2024-06-27 17:10:56,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385004190] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:10:56,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215196352] [2024-06-27 17:10:56,991 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 17:10:56,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:10:56,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:10:56,992 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:10:57,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-06-27 17:10:57,060 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 17:10:57,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:10:57,061 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 29 conjunts are in the unsatisfiable core [2024-06-27 17:10:57,062 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:10:57,250 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:10:57,251 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 105 treesize of output 75 [2024-06-27 17:10:57,349 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 17:10:57,349 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:10:57,574 INFO L349 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2024-06-27 17:10:57,574 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2024-06-27 17:10:57,621 INFO L349 Elim1Store]: treesize reduction 74, result has 29.5 percent of original size [2024-06-27 17:10:57,621 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 61 [2024-06-27 17:10:57,655 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:10:57,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215196352] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:10:57,656 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:10:57,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 8] total 26 [2024-06-27 17:10:57,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662774684] [2024-06-27 17:10:57,656 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:10:57,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-06-27 17:10:57,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:10:57,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-06-27 17:10:57,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=590, Unknown=0, NotChecked=0, Total=702 [2024-06-27 17:10:57,657 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-06-27 17:10:57,658 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 525 transitions, 11384 flow. Second operand has 27 states, 27 states have (on average 4.7407407407407405) internal successors, (128), 27 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:10:57,658 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:10:57,658 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-06-27 17:10:57,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:10:59,358 INFO L124 PetriNetUnfolderBase]: 1885/4045 cut-off events. [2024-06-27 17:10:59,358 INFO L125 PetriNetUnfolderBase]: For 100164/100164 co-relation queries the response was YES. [2024-06-27 17:10:59,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36953 conditions, 4045 events. 1885/4045 cut-off events. For 100164/100164 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 31480 event pairs, 154 based on Foata normal form. 2/4046 useless extension candidates. Maximal degree in co-relation 36759. Up to 3395 conditions per place. [2024-06-27 17:10:59,401 INFO L140 encePairwiseOnDemand]: 10/20 looper letters, 521 selfloop transitions, 143 changer transitions 16/681 dead transitions. [2024-06-27 17:10:59,401 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 681 transitions, 15333 flow [2024-06-27 17:10:59,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-06-27 17:10:59,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-06-27 17:10:59,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 238 transitions. [2024-06-27 17:10:59,404 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44074074074074077 [2024-06-27 17:10:59,405 INFO L175 Difference]: Start difference. First operand has 310 places, 525 transitions, 11384 flow. Second operand 27 states and 238 transitions. [2024-06-27 17:10:59,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 681 transitions, 15333 flow [2024-06-27 17:10:59,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 681 transitions, 15094 flow, removed 98 selfloop flow, removed 5 redundant places. [2024-06-27 17:10:59,844 INFO L231 Difference]: Finished difference. Result has 339 places, 595 transitions, 13309 flow [2024-06-27 17:10:59,844 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=11259, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=525, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=438, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=13309, PETRI_PLACES=339, PETRI_TRANSITIONS=595} [2024-06-27 17:10:59,845 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 318 predicate places. [2024-06-27 17:10:59,847 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 595 transitions, 13309 flow [2024-06-27 17:10:59,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.7407407407407405) internal successors, (128), 27 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:10:59,847 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:10:59,847 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:10:59,858 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2024-06-27 17:11:00,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:11:00,048 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:11:00,048 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:11:00,048 INFO L85 PathProgramCache]: Analyzing trace with hash -1018984706, now seen corresponding path program 5 times [2024-06-27 17:11:00,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:11:00,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420304722] [2024-06-27 17:11:00,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:11:00,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:11:00,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:11:00,605 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:11:00,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:11:00,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420304722] [2024-06-27 17:11:00,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420304722] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:11:00,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143911673] [2024-06-27 17:11:00,606 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-27 17:11:00,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:11:00,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:11:00,607 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:11:00,608 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-06-27 17:11:00,683 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 17:11:00,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:11:00,684 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 29 conjunts are in the unsatisfiable core [2024-06-27 17:11:00,685 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:11:00,863 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:11:00,863 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 22 [2024-06-27 17:11:00,866 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:11:00,866 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:11:01,304 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:11:01,304 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 127 treesize of output 152 [2024-06-27 17:11:01,550 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:11:01,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143911673] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:11:01,550 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:11:01,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 9] total 26 [2024-06-27 17:11:01,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182720696] [2024-06-27 17:11:01,551 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:11:01,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-06-27 17:11:01,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:11:01,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-06-27 17:11:01,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=602, Unknown=0, NotChecked=0, Total=702 [2024-06-27 17:11:01,552 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-06-27 17:11:01,552 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 595 transitions, 13309 flow. Second operand has 27 states, 27 states have (on average 4.777777777777778) internal successors, (129), 27 states have internal predecessors, (129), 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 17:11:01,552 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:11:01,552 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-06-27 17:11:01,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:11:03,302 INFO L124 PetriNetUnfolderBase]: 1874/4007 cut-off events. [2024-06-27 17:11:03,302 INFO L125 PetriNetUnfolderBase]: For 116801/116801 co-relation queries the response was YES. [2024-06-27 17:11:03,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37993 conditions, 4007 events. 1874/4007 cut-off events. For 116801/116801 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 31017 event pairs, 154 based on Foata normal form. 3/4010 useless extension candidates. Maximal degree in co-relation 37790. Up to 3429 conditions per place. [2024-06-27 17:11:03,346 INFO L140 encePairwiseOnDemand]: 9/20 looper letters, 524 selfloop transitions, 140 changer transitions 13/678 dead transitions. [2024-06-27 17:11:03,346 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 678 transitions, 15468 flow [2024-06-27 17:11:03,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-06-27 17:11:03,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-06-27 17:11:03,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 227 transitions. [2024-06-27 17:11:03,347 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43653846153846154 [2024-06-27 17:11:03,347 INFO L175 Difference]: Start difference. First operand has 339 places, 595 transitions, 13309 flow. Second operand 26 states and 227 transitions. [2024-06-27 17:11:03,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 678 transitions, 15468 flow [2024-06-27 17:11:03,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 678 transitions, 15291 flow, removed 78 selfloop flow, removed 7 redundant places. [2024-06-27 17:11:03,890 INFO L231 Difference]: Finished difference. Result has 359 places, 598 transitions, 13504 flow [2024-06-27 17:11:03,891 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=13132, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=595, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=455, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=13504, PETRI_PLACES=359, PETRI_TRANSITIONS=598} [2024-06-27 17:11:03,891 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 338 predicate places. [2024-06-27 17:11:03,891 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 598 transitions, 13504 flow [2024-06-27 17:11:03,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.777777777777778) internal successors, (129), 27 states have internal predecessors, (129), 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 17:11:03,891 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:11:03,891 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:11:03,902 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2024-06-27 17:11:04,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:11:04,092 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:11:04,092 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:11:04,092 INFO L85 PathProgramCache]: Analyzing trace with hash -1179978804, now seen corresponding path program 6 times [2024-06-27 17:11:04,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:11:04,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680583099] [2024-06-27 17:11:04,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:11:04,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:11:04,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:11:04,802 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:11:04,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:11:04,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680583099] [2024-06-27 17:11:04,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680583099] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:11:04,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402635181] [2024-06-27 17:11:04,803 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-27 17:11:04,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:11:04,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:11:04,804 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:11:04,806 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-06-27 17:11:04,876 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-06-27 17:11:04,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:11:04,877 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 33 conjunts are in the unsatisfiable core [2024-06-27 17:11:04,878 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:11:05,079 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:11:05,079 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 93 treesize of output 71 [2024-06-27 17:11:05,159 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 17:11:05,159 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:11:05,387 INFO L349 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2024-06-27 17:11:05,387 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2024-06-27 17:11:05,433 INFO L349 Elim1Store]: treesize reduction 74, result has 29.5 percent of original size [2024-06-27 17:11:05,434 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 61 [2024-06-27 17:11:05,465 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:11:05,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402635181] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:11:05,465 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:11:05,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 8] total 27 [2024-06-27 17:11:05,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509868975] [2024-06-27 17:11:05,466 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:11:05,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-06-27 17:11:05,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:11:05,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-06-27 17:11:05,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=636, Unknown=0, NotChecked=0, Total=756 [2024-06-27 17:11:05,467 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-06-27 17:11:05,468 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 598 transitions, 13504 flow. Second operand has 28 states, 28 states have (on average 4.678571428571429) internal successors, (131), 28 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 17:11:05,468 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:11:05,468 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-06-27 17:11:05,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:11:07,409 INFO L124 PetriNetUnfolderBase]: 1934/4117 cut-off events. [2024-06-27 17:11:07,409 INFO L125 PetriNetUnfolderBase]: For 122821/122821 co-relation queries the response was YES. [2024-06-27 17:11:07,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39277 conditions, 4117 events. 1934/4117 cut-off events. For 122821/122821 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 32069 event pairs, 192 based on Foata normal form. 3/4120 useless extension candidates. Maximal degree in co-relation 39072. Up to 3656 conditions per place. [2024-06-27 17:11:07,455 INFO L140 encePairwiseOnDemand]: 10/20 looper letters, 559 selfloop transitions, 115 changer transitions 11/686 dead transitions. [2024-06-27 17:11:07,456 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 686 transitions, 16059 flow [2024-06-27 17:11:07,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-06-27 17:11:07,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-06-27 17:11:07,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 209 transitions. [2024-06-27 17:11:07,457 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40192307692307694 [2024-06-27 17:11:07,457 INFO L175 Difference]: Start difference. First operand has 359 places, 598 transitions, 13504 flow. Second operand 26 states and 209 transitions. [2024-06-27 17:11:07,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 686 transitions, 16059 flow [2024-06-27 17:11:08,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 686 transitions, 15717 flow, removed 13 selfloop flow, removed 26 redundant places. [2024-06-27 17:11:08,067 INFO L231 Difference]: Finished difference. Result has 368 places, 629 transitions, 14254 flow [2024-06-27 17:11:08,077 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=13166, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=598, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=485, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=14254, PETRI_PLACES=368, PETRI_TRANSITIONS=629} [2024-06-27 17:11:08,077 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 347 predicate places. [2024-06-27 17:11:08,078 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 629 transitions, 14254 flow [2024-06-27 17:11:08,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 4.678571428571429) internal successors, (131), 28 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 17:11:08,078 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:11:08,078 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:11:08,091 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2024-06-27 17:11:08,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2024-06-27 17:11:08,292 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:11:08,292 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:11:08,292 INFO L85 PathProgramCache]: Analyzing trace with hash 470420290, now seen corresponding path program 7 times [2024-06-27 17:11:08,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:11:08,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237433029] [2024-06-27 17:11:08,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:11:08,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:11:08,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:11:08,841 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:11:08,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:11:08,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237433029] [2024-06-27 17:11:08,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237433029] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:11:08,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969040136] [2024-06-27 17:11:08,841 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-06-27 17:11:08,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:11:08,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:11:08,843 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:11:08,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-06-27 17:11:08,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:11:08,912 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 29 conjunts are in the unsatisfiable core [2024-06-27 17:11:08,913 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:11:09,079 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:11:09,080 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 22 [2024-06-27 17:11:09,085 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 17:11:09,085 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:11:09,327 INFO L349 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2024-06-27 17:11:09,327 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2024-06-27 17:11:09,375 INFO L349 Elim1Store]: treesize reduction 74, result has 29.5 percent of original size [2024-06-27 17:11:09,375 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 61 [2024-06-27 17:11:09,406 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:11:09,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969040136] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:11:09,407 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:11:09,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 8] total 26 [2024-06-27 17:11:09,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559582466] [2024-06-27 17:11:09,407 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:11:09,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-06-27 17:11:09,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:11:09,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-06-27 17:11:09,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=610, Unknown=0, NotChecked=0, Total=702 [2024-06-27 17:11:09,408 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-06-27 17:11:09,409 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 629 transitions, 14254 flow. Second operand has 27 states, 27 states have (on average 4.814814814814815) internal successors, (130), 27 states have internal predecessors, (130), 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 17:11:09,409 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:11:09,409 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-06-27 17:11:09,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:11:11,330 INFO L124 PetriNetUnfolderBase]: 1994/4215 cut-off events. [2024-06-27 17:11:11,330 INFO L125 PetriNetUnfolderBase]: For 144216/144216 co-relation queries the response was YES. [2024-06-27 17:11:11,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41611 conditions, 4215 events. 1994/4215 cut-off events. For 144216/144216 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 32746 event pairs, 196 based on Foata normal form. 5/4220 useless extension candidates. Maximal degree in co-relation 41397. Up to 3805 conditions per place. [2024-06-27 17:11:11,379 INFO L140 encePairwiseOnDemand]: 9/20 looper letters, 618 selfloop transitions, 95 changer transitions 17/731 dead transitions. [2024-06-27 17:11:11,379 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 731 transitions, 17125 flow [2024-06-27 17:11:11,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-06-27 17:11:11,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2024-06-27 17:11:11,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 240 transitions. [2024-06-27 17:11:11,380 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41379310344827586 [2024-06-27 17:11:11,380 INFO L175 Difference]: Start difference. First operand has 368 places, 629 transitions, 14254 flow. Second operand 29 states and 240 transitions. [2024-06-27 17:11:11,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 731 transitions, 17125 flow [2024-06-27 17:11:12,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 731 transitions, 16744 flow, removed 119 selfloop flow, removed 18 redundant places. [2024-06-27 17:11:12,086 INFO L231 Difference]: Finished difference. Result has 384 places, 657 transitions, 14968 flow [2024-06-27 17:11:12,086 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=13889, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=629, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=537, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=14968, PETRI_PLACES=384, PETRI_TRANSITIONS=657} [2024-06-27 17:11:12,087 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 363 predicate places. [2024-06-27 17:11:12,087 INFO L495 AbstractCegarLoop]: Abstraction has has 384 places, 657 transitions, 14968 flow [2024-06-27 17:11:12,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.814814814814815) internal successors, (130), 27 states have internal predecessors, (130), 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 17:11:12,087 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:11:12,087 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:11:12,097 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2024-06-27 17:11:12,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:11:12,288 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:11:12,288 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:11:12,288 INFO L85 PathProgramCache]: Analyzing trace with hash -2039447980, now seen corresponding path program 8 times [2024-06-27 17:11:12,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:11:12,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655040949] [2024-06-27 17:11:12,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:11:12,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:11:12,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:11:12,903 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:11:12,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:11:12,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655040949] [2024-06-27 17:11:12,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655040949] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:11:12,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850297697] [2024-06-27 17:11:12,903 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 17:11:12,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:11:12,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:11:12,905 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:11:12,906 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-06-27 17:11:12,977 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 17:11:12,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:11:12,979 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 33 conjunts are in the unsatisfiable core [2024-06-27 17:11:12,980 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:11:13,215 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:11:13,217 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 60 [2024-06-27 17:11:13,306 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 17:11:13,306 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:11:13,539 INFO L349 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2024-06-27 17:11:13,539 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2024-06-27 17:11:13,600 INFO L349 Elim1Store]: treesize reduction 74, result has 29.5 percent of original size [2024-06-27 17:11:13,601 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 61 [2024-06-27 17:11:13,635 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:11:13,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850297697] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:11:13,635 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:11:13,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 8] total 27 [2024-06-27 17:11:13,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739126360] [2024-06-27 17:11:13,636 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:11:13,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-06-27 17:11:13,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:11:13,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-06-27 17:11:13,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=644, Unknown=0, NotChecked=0, Total=756 [2024-06-27 17:11:13,637 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-06-27 17:11:13,638 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 657 transitions, 14968 flow. Second operand has 28 states, 28 states have (on average 4.678571428571429) internal successors, (131), 28 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 17:11:13,638 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:11:13,638 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-06-27 17:11:13,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:11:15,525 INFO L124 PetriNetUnfolderBase]: 2040/4282 cut-off events. [2024-06-27 17:11:15,526 INFO L125 PetriNetUnfolderBase]: For 159216/159216 co-relation queries the response was YES. [2024-06-27 17:11:15,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43021 conditions, 4282 events. 2040/4282 cut-off events. For 159216/159216 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 33132 event pairs, 202 based on Foata normal form. 2/4284 useless extension candidates. Maximal degree in co-relation 42803. Up to 3869 conditions per place. [2024-06-27 17:11:15,573 INFO L140 encePairwiseOnDemand]: 10/20 looper letters, 613 selfloop transitions, 109 changer transitions 12/735 dead transitions. [2024-06-27 17:11:15,573 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 409 places, 735 transitions, 17540 flow [2024-06-27 17:11:15,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-06-27 17:11:15,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-06-27 17:11:15,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 205 transitions. [2024-06-27 17:11:15,574 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37962962962962965 [2024-06-27 17:11:15,574 INFO L175 Difference]: Start difference. First operand has 384 places, 657 transitions, 14968 flow. Second operand 27 states and 205 transitions. [2024-06-27 17:11:15,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 409 places, 735 transitions, 17540 flow [2024-06-27 17:11:16,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 735 transitions, 17056 flow, removed 124 selfloop flow, removed 21 redundant places. [2024-06-27 17:11:16,273 INFO L231 Difference]: Finished difference. Result has 395 places, 686 transitions, 15467 flow [2024-06-27 17:11:16,273 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=14484, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=657, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=554, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=15467, PETRI_PLACES=395, PETRI_TRANSITIONS=686} [2024-06-27 17:11:16,274 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 374 predicate places. [2024-06-27 17:11:16,274 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 686 transitions, 15467 flow [2024-06-27 17:11:16,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 4.678571428571429) internal successors, (131), 28 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 17:11:16,274 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:11:16,274 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:11:16,285 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2024-06-27 17:11:16,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:11:16,475 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:11:16,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:11:16,476 INFO L85 PathProgramCache]: Analyzing trace with hash -1263095694, now seen corresponding path program 9 times [2024-06-27 17:11:16,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:11:16,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066380528] [2024-06-27 17:11:16,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:11:16,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:11:16,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:11:16,953 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:11:16,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:11:16,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066380528] [2024-06-27 17:11:16,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066380528] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:11:16,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885102955] [2024-06-27 17:11:16,953 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 17:11:16,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:11:16,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:11:16,954 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:11:16,955 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-06-27 17:11:17,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-06-27 17:11:17,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:11:17,023 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 33 conjunts are in the unsatisfiable core [2024-06-27 17:11:17,024 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:11:17,222 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:11:17,222 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 20 [2024-06-27 17:11:17,225 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 17:11:17,226 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:11:17,441 INFO L349 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2024-06-27 17:11:17,441 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2024-06-27 17:11:17,492 INFO L349 Elim1Store]: treesize reduction 74, result has 29.5 percent of original size [2024-06-27 17:11:17,493 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 61 [2024-06-27 17:11:17,525 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:11:17,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885102955] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:11:17,526 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:11:17,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 8] total 27 [2024-06-27 17:11:17,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335593706] [2024-06-27 17:11:17,526 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:11:17,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-06-27 17:11:17,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:11:17,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-06-27 17:11:17,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=656, Unknown=0, NotChecked=0, Total=756 [2024-06-27 17:11:17,527 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-06-27 17:11:17,527 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 686 transitions, 15467 flow. Second operand has 28 states, 28 states have (on average 4.678571428571429) internal successors, (131), 28 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 17:11:17,527 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:11:17,527 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-06-27 17:11:17,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:11:19,541 INFO L124 PetriNetUnfolderBase]: 2039/4279 cut-off events. [2024-06-27 17:11:19,541 INFO L125 PetriNetUnfolderBase]: For 176031/176031 co-relation queries the response was YES. [2024-06-27 17:11:19,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43553 conditions, 4279 events. 2039/4279 cut-off events. For 176031/176031 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 33030 event pairs, 196 based on Foata normal form. 4/4283 useless extension candidates. Maximal degree in co-relation 43330. Up to 3903 conditions per place. [2024-06-27 17:11:19,698 INFO L140 encePairwiseOnDemand]: 9/20 looper letters, 641 selfloop transitions, 90 changer transitions 13/745 dead transitions. [2024-06-27 17:11:19,699 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 745 transitions, 17457 flow [2024-06-27 17:11:19,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-06-27 17:11:19,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-06-27 17:11:19,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 215 transitions. [2024-06-27 17:11:19,700 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39814814814814814 [2024-06-27 17:11:19,700 INFO L175 Difference]: Start difference. First operand has 395 places, 686 transitions, 15467 flow. Second operand 27 states and 215 transitions. [2024-06-27 17:11:19,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 745 transitions, 17457 flow [2024-06-27 17:11:20,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 745 transitions, 17181 flow, removed 91 selfloop flow, removed 15 redundant places. [2024-06-27 17:11:20,482 INFO L231 Difference]: Finished difference. Result has 409 places, 685 transitions, 15394 flow [2024-06-27 17:11:20,483 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=15191, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=686, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=596, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=15394, PETRI_PLACES=409, PETRI_TRANSITIONS=685} [2024-06-27 17:11:20,483 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 388 predicate places. [2024-06-27 17:11:20,483 INFO L495 AbstractCegarLoop]: Abstraction has has 409 places, 685 transitions, 15394 flow [2024-06-27 17:11:20,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 4.678571428571429) internal successors, (131), 28 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 17:11:20,484 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:11:20,484 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:11:20,494 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2024-06-27 17:11:20,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2024-06-27 17:11:20,684 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:11:20,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:11:20,685 INFO L85 PathProgramCache]: Analyzing trace with hash -18956690, now seen corresponding path program 10 times [2024-06-27 17:11:20,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:11:20,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465696545] [2024-06-27 17:11:20,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:11:20,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:11:20,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:11:21,117 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:11:21,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:11:21,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465696545] [2024-06-27 17:11:21,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465696545] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:11:21,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332846972] [2024-06-27 17:11:21,117 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 17:11:21,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:11:21,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:11:21,118 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:11:21,119 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2024-06-27 17:11:21,191 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 17:11:21,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:11:21,193 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 29 conjunts are in the unsatisfiable core [2024-06-27 17:11:21,194 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:11:21,358 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:11:21,359 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 105 treesize of output 75 [2024-06-27 17:11:21,438 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 17:11:21,439 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:11:21,665 INFO L349 Elim1Store]: treesize reduction 10, result has 90.5 percent of original size [2024-06-27 17:11:21,666 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 125 [2024-06-27 17:11:21,763 INFO L349 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2024-06-27 17:11:21,763 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2024-06-27 17:11:21,836 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:11:21,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332846972] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:11:21,836 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:11:21,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 8] total 25 [2024-06-27 17:11:21,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613988556] [2024-06-27 17:11:21,837 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:11:21,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-06-27 17:11:21,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:11:21,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-06-27 17:11:21,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=525, Unknown=0, NotChecked=0, Total=650 [2024-06-27 17:11:21,838 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-06-27 17:11:21,838 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 409 places, 685 transitions, 15394 flow. Second operand has 26 states, 26 states have (on average 4.8076923076923075) internal successors, (125), 26 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:11:21,838 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:11:21,838 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-06-27 17:11:21,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:11:23,793 INFO L124 PetriNetUnfolderBase]: 2296/4727 cut-off events. [2024-06-27 17:11:23,793 INFO L125 PetriNetUnfolderBase]: For 200772/200772 co-relation queries the response was YES. [2024-06-27 17:11:23,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48608 conditions, 4727 events. 2296/4727 cut-off events. For 200772/200772 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 36600 event pairs, 193 based on Foata normal form. 4/4731 useless extension candidates. Maximal degree in co-relation 48313. Up to 4101 conditions per place. [2024-06-27 17:11:23,856 INFO L140 encePairwiseOnDemand]: 10/20 looper letters, 730 selfloop transitions, 131 changer transitions 9/871 dead transitions. [2024-06-27 17:11:23,856 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 871 transitions, 20431 flow [2024-06-27 17:11:23,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-06-27 17:11:23,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2024-06-27 17:11:23,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 252 transitions. [2024-06-27 17:11:23,857 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42 [2024-06-27 17:11:23,857 INFO L175 Difference]: Start difference. First operand has 409 places, 685 transitions, 15394 flow. Second operand 30 states and 252 transitions. [2024-06-27 17:11:23,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 871 transitions, 20431 flow [2024-06-27 17:11:24,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 871 transitions, 20179 flow, removed 47 selfloop flow, removed 22 redundant places. [2024-06-27 17:11:24,998 INFO L231 Difference]: Finished difference. Result has 429 places, 771 transitions, 17693 flow [2024-06-27 17:11:24,999 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=15154, PETRI_DIFFERENCE_MINUEND_PLACES=386, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=685, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=569, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=17693, PETRI_PLACES=429, PETRI_TRANSITIONS=771} [2024-06-27 17:11:24,999 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 408 predicate places. [2024-06-27 17:11:24,999 INFO L495 AbstractCegarLoop]: Abstraction has has 429 places, 771 transitions, 17693 flow [2024-06-27 17:11:24,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.8076923076923075) internal successors, (125), 26 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:11:24,999 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:11:24,999 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:11:25,010 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2024-06-27 17:11:25,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2024-06-27 17:11:25,200 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:11:25,200 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:11:25,200 INFO L85 PathProgramCache]: Analyzing trace with hash -878425866, now seen corresponding path program 11 times [2024-06-27 17:11:25,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:11:25,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928341373] [2024-06-27 17:11:25,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:11:25,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:11:25,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:11:25,646 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:11:25,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:11:25,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928341373] [2024-06-27 17:11:25,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928341373] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:11:25,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795512684] [2024-06-27 17:11:25,647 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-27 17:11:25,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:11:25,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:11:25,648 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:11:25,648 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2024-06-27 17:11:25,714 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 17:11:25,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:11:25,715 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 27 conjunts are in the unsatisfiable core [2024-06-27 17:11:25,716 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:11:25,901 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:11:25,901 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 82 treesize of output 64 [2024-06-27 17:11:25,988 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:11:25,988 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:11:26,215 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:11:26,215 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 133 treesize of output 158 [2024-06-27 17:11:26,468 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:11:26,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795512684] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:11:26,468 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:11:26,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 25 [2024-06-27 17:11:26,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192923827] [2024-06-27 17:11:26,469 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:11:26,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-06-27 17:11:26,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:11:26,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-06-27 17:11:26,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2024-06-27 17:11:26,470 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-06-27 17:11:26,470 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 429 places, 771 transitions, 17693 flow. Second operand has 26 states, 26 states have (on average 4.769230769230769) internal successors, (124), 26 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:11:26,470 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:11:26,470 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-06-27 17:11:26,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:11:28,366 INFO L124 PetriNetUnfolderBase]: 2311/4763 cut-off events. [2024-06-27 17:11:28,366 INFO L125 PetriNetUnfolderBase]: For 236952/236952 co-relation queries the response was YES. [2024-06-27 17:11:28,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50603 conditions, 4763 events. 2311/4763 cut-off events. For 236952/236952 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 37169 event pairs, 204 based on Foata normal form. 3/4766 useless extension candidates. Maximal degree in co-relation 50296. Up to 4334 conditions per place. [2024-06-27 17:11:28,426 INFO L140 encePairwiseOnDemand]: 10/20 looper letters, 712 selfloop transitions, 103 changer transitions 7/823 dead transitions. [2024-06-27 17:11:28,426 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 449 places, 823 transitions, 20199 flow [2024-06-27 17:11:28,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-06-27 17:11:28,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-06-27 17:11:28,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 175 transitions. [2024-06-27 17:11:28,427 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3804347826086957 [2024-06-27 17:11:28,427 INFO L175 Difference]: Start difference. First operand has 429 places, 771 transitions, 17693 flow. Second operand 23 states and 175 transitions. [2024-06-27 17:11:28,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 449 places, 823 transitions, 20199 flow [2024-06-27 17:11:29,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 823 transitions, 19826 flow, removed 151 selfloop flow, removed 12 redundant places. [2024-06-27 17:11:29,561 INFO L231 Difference]: Finished difference. Result has 443 places, 781 transitions, 17828 flow [2024-06-27 17:11:29,561 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=17334, PETRI_DIFFERENCE_MINUEND_PLACES=415, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=771, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=670, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=17828, PETRI_PLACES=443, PETRI_TRANSITIONS=781} [2024-06-27 17:11:29,561 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 422 predicate places. [2024-06-27 17:11:29,561 INFO L495 AbstractCegarLoop]: Abstraction has has 443 places, 781 transitions, 17828 flow [2024-06-27 17:11:29,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.769230769230769) internal successors, (124), 26 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:11:29,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:11:29,562 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:11:29,572 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2024-06-27 17:11:29,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2024-06-27 17:11:29,765 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:11:29,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:11:29,766 INFO L85 PathProgramCache]: Analyzing trace with hash 835858779, now seen corresponding path program 12 times [2024-06-27 17:11:29,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:11:29,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176365310] [2024-06-27 17:11:29,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:11:29,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:11:29,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:11:29,892 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:11:29,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:11:29,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176365310] [2024-06-27 17:11:29,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176365310] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:11:29,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328563432] [2024-06-27 17:11:29,893 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-27 17:11:29,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:11:29,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:11:29,894 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:11:29,895 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2024-06-27 17:11:30,002 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-06-27 17:11:30,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:11:30,003 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 14 conjunts are in the unsatisfiable core [2024-06-27 17:11:30,004 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:11:30,056 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:11:30,056 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:11:30,251 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:11:30,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328563432] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:11:30,252 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:11:30,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 16 [2024-06-27 17:11:30,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010513602] [2024-06-27 17:11:30,252 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:11:30,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-06-27 17:11:30,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:11:30,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-06-27 17:11:30,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2024-06-27 17:11:30,253 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-06-27 17:11:30,253 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 443 places, 781 transitions, 17828 flow. Second operand has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 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 17:11:30,253 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:11:30,253 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-06-27 17:11:30,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:11:34,668 INFO L124 PetriNetUnfolderBase]: 2495/5177 cut-off events. [2024-06-27 17:11:34,669 INFO L125 PetriNetUnfolderBase]: For 287986/287986 co-relation queries the response was YES. [2024-06-27 17:11:34,720 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55631 conditions, 5177 events. 2495/5177 cut-off events. For 287986/287986 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 41487 event pairs, 458 based on Foata normal form. 22/5199 useless extension candidates. Maximal degree in co-relation 55283. Up to 2209 conditions per place. [2024-06-27 17:11:34,741 INFO L140 encePairwiseOnDemand]: 13/20 looper letters, 565 selfloop transitions, 383 changer transitions 2/951 dead transitions. [2024-06-27 17:11:34,742 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 475 places, 951 transitions, 22688 flow [2024-06-27 17:11:34,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-06-27 17:11:34,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2024-06-27 17:11:34,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 268 transitions. [2024-06-27 17:11:34,743 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3941176470588235 [2024-06-27 17:11:34,743 INFO L175 Difference]: Start difference. First operand has 443 places, 781 transitions, 17828 flow. Second operand 34 states and 268 transitions. [2024-06-27 17:11:34,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 475 places, 951 transitions, 22688 flow [2024-06-27 17:11:36,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 461 places, 951 transitions, 22248 flow, removed 61 selfloop flow, removed 14 redundant places. [2024-06-27 17:11:36,408 INFO L231 Difference]: Finished difference. Result has 471 places, 879 transitions, 21212 flow [2024-06-27 17:11:36,408 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=17359, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=778, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=291, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=424, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=21212, PETRI_PLACES=471, PETRI_TRANSITIONS=879} [2024-06-27 17:11:36,409 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 450 predicate places. [2024-06-27 17:11:36,409 INFO L495 AbstractCegarLoop]: Abstraction has has 471 places, 879 transitions, 21212 flow [2024-06-27 17:11:36,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 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 17:11:36,409 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:11:36,409 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:11:36,420 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2024-06-27 17:11:36,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2024-06-27 17:11:36,610 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:11:36,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:11:36,610 INFO L85 PathProgramCache]: Analyzing trace with hash -138225532, now seen corresponding path program 13 times [2024-06-27 17:11:36,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:11:36,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211735268] [2024-06-27 17:11:36,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:11:36,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:11:36,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:11:37,080 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:11:37,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:11:37,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211735268] [2024-06-27 17:11:37,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211735268] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:11:37,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606389371] [2024-06-27 17:11:37,081 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-06-27 17:11:37,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:11:37,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:11:37,082 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:11:37,082 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2024-06-27 17:11:37,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:11:37,151 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 29 conjunts are in the unsatisfiable core [2024-06-27 17:11:37,151 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:11:37,318 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:11:37,318 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 22 [2024-06-27 17:11:37,322 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 17:11:37,322 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:11:37,585 INFO L349 Elim1Store]: treesize reduction 10, result has 90.5 percent of original size [2024-06-27 17:11:37,586 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 125 [2024-06-27 17:11:37,693 INFO L349 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2024-06-27 17:11:37,694 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2024-06-27 17:11:37,762 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:11:37,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606389371] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:11:37,762 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:11:37,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 8] total 26 [2024-06-27 17:11:37,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126977454] [2024-06-27 17:11:37,763 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:11:37,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-06-27 17:11:37,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:11:37,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-06-27 17:11:37,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2024-06-27 17:11:37,763 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-06-27 17:11:37,764 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 471 places, 879 transitions, 21212 flow. Second operand has 27 states, 27 states have (on average 4.814814814814815) internal successors, (130), 27 states have internal predecessors, (130), 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 17:11:37,764 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:11:37,764 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-06-27 17:11:37,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:11:40,203 INFO L124 PetriNetUnfolderBase]: 2531/5228 cut-off events. [2024-06-27 17:11:40,203 INFO L125 PetriNetUnfolderBase]: For 304968/304968 co-relation queries the response was YES. [2024-06-27 17:11:40,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58594 conditions, 5228 events. 2531/5228 cut-off events. For 304968/304968 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 41737 event pairs, 254 based on Foata normal form. 5/5233 useless extension candidates. Maximal degree in co-relation 58288. Up to 4859 conditions per place. [2024-06-27 17:11:40,280 INFO L140 encePairwiseOnDemand]: 9/20 looper letters, 866 selfloop transitions, 81 changer transitions 11/959 dead transitions. [2024-06-27 17:11:40,280 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 497 places, 959 transitions, 24289 flow [2024-06-27 17:11:40,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-06-27 17:11:40,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-06-27 17:11:40,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 218 transitions. [2024-06-27 17:11:40,281 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40370370370370373 [2024-06-27 17:11:40,281 INFO L175 Difference]: Start difference. First operand has 471 places, 879 transitions, 21212 flow. Second operand 27 states and 218 transitions. [2024-06-27 17:11:40,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 497 places, 959 transitions, 24289 flow [2024-06-27 17:11:42,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 481 places, 959 transitions, 23153 flow, removed 466 selfloop flow, removed 16 redundant places. [2024-06-27 17:11:42,288 INFO L231 Difference]: Finished difference. Result has 489 places, 897 transitions, 20963 flow [2024-06-27 17:11:42,288 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=20090, PETRI_DIFFERENCE_MINUEND_PLACES=455, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=879, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=799, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=20963, PETRI_PLACES=489, PETRI_TRANSITIONS=897} [2024-06-27 17:11:42,289 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 468 predicate places. [2024-06-27 17:11:42,289 INFO L495 AbstractCegarLoop]: Abstraction has has 489 places, 897 transitions, 20963 flow [2024-06-27 17:11:42,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.814814814814815) internal successors, (130), 27 states have internal predecessors, (130), 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 17:11:42,289 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:11:42,289 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:11:42,302 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2024-06-27 17:11:42,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:11:42,490 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:11:42,490 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:11:42,490 INFO L85 PathProgramCache]: Analyzing trace with hash 1963254872, now seen corresponding path program 14 times [2024-06-27 17:11:42,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:11:42,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509537668] [2024-06-27 17:11:42,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:11:42,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:11:42,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:11:42,985 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:11:42,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:11:42,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509537668] [2024-06-27 17:11:42,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509537668] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:11:42,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229027865] [2024-06-27 17:11:42,986 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 17:11:42,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:11:42,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:11:42,987 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:11:43,004 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2024-06-27 17:11:43,059 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 17:11:43,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:11:43,061 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 33 conjunts are in the unsatisfiable core [2024-06-27 17:11:43,061 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:11:43,259 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:11:43,260 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 20 [2024-06-27 17:11:43,266 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 17:11:43,266 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:11:43,459 INFO L349 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2024-06-27 17:11:43,460 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2024-06-27 17:11:43,510 INFO L349 Elim1Store]: treesize reduction 74, result has 29.5 percent of original size [2024-06-27 17:11:43,510 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 61 [2024-06-27 17:11:43,564 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:11:43,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229027865] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:11:43,564 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:11:43,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 8] total 27 [2024-06-27 17:11:43,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074233855] [2024-06-27 17:11:43,565 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:11:43,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-06-27 17:11:43,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:11:43,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-06-27 17:11:43,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=643, Unknown=0, NotChecked=0, Total=756 [2024-06-27 17:11:43,566 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-06-27 17:11:43,566 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 489 places, 897 transitions, 20963 flow. Second operand has 28 states, 28 states have (on average 4.75) internal successors, (133), 28 states have internal predecessors, (133), 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 17:11:43,566 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:11:43,566 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-06-27 17:11:43,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:11:46,281 INFO L124 PetriNetUnfolderBase]: 2586/5318 cut-off events. [2024-06-27 17:11:46,281 INFO L125 PetriNetUnfolderBase]: For 315158/315158 co-relation queries the response was YES. [2024-06-27 17:11:46,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58738 conditions, 5318 events. 2586/5318 cut-off events. For 315158/315158 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 42159 event pairs, 252 based on Foata normal form. 4/5322 useless extension candidates. Maximal degree in co-relation 58474. Up to 4975 conditions per place. [2024-06-27 17:11:46,359 INFO L140 encePairwiseOnDemand]: 9/20 looper letters, 886 selfloop transitions, 80 changer transitions 10/977 dead transitions. [2024-06-27 17:11:46,360 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 513 places, 977 transitions, 24241 flow [2024-06-27 17:11:46,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-06-27 17:11:46,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-06-27 17:11:46,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 204 transitions. [2024-06-27 17:11:46,361 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3923076923076923 [2024-06-27 17:11:46,361 INFO L175 Difference]: Start difference. First operand has 489 places, 897 transitions, 20963 flow. Second operand 26 states and 204 transitions. [2024-06-27 17:11:46,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 513 places, 977 transitions, 24241 flow [2024-06-27 17:11:48,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 496 places, 977 transitions, 23735 flow, removed 194 selfloop flow, removed 17 redundant places. [2024-06-27 17:11:48,292 INFO L231 Difference]: Finished difference. Result has 504 places, 923 transitions, 21550 flow [2024-06-27 17:11:48,293 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=20457, PETRI_DIFFERENCE_MINUEND_PLACES=471, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=897, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=818, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=21550, PETRI_PLACES=504, PETRI_TRANSITIONS=923} [2024-06-27 17:11:48,293 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 483 predicate places. [2024-06-27 17:11:48,293 INFO L495 AbstractCegarLoop]: Abstraction has has 504 places, 923 transitions, 21550 flow [2024-06-27 17:11:48,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 4.75) internal successors, (133), 28 states have internal predecessors, (133), 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 17:11:48,294 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:11:48,294 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:11:48,304 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2024-06-27 17:11:48,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2024-06-27 17:11:48,494 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:11:48,494 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:11:48,495 INFO L85 PathProgramCache]: Analyzing trace with hash -1752166546, now seen corresponding path program 15 times [2024-06-27 17:11:48,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:11:48,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073221079] [2024-06-27 17:11:48,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:11:48,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:11:48,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:11:49,003 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:11:49,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:11:49,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073221079] [2024-06-27 17:11:49,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073221079] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:11:49,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034905780] [2024-06-27 17:11:49,004 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 17:11:49,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:11:49,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:11:49,007 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:11:49,007 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2024-06-27 17:11:49,075 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-06-27 17:11:49,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:11:49,076 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 33 conjunts are in the unsatisfiable core [2024-06-27 17:11:49,077 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:11:49,275 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:11:49,276 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 60 [2024-06-27 17:11:49,343 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 17:11:49,343 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:11:49,517 INFO L349 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2024-06-27 17:11:49,520 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2024-06-27 17:11:49,569 INFO L349 Elim1Store]: treesize reduction 74, result has 29.5 percent of original size [2024-06-27 17:11:49,570 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 61 [2024-06-27 17:11:49,623 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:11:49,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034905780] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:11:49,623 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:11:49,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 8] total 26 [2024-06-27 17:11:49,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371965793] [2024-06-27 17:11:49,624 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:11:49,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-06-27 17:11:49,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:11:49,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-06-27 17:11:49,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2024-06-27 17:11:49,625 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-06-27 17:11:49,625 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 504 places, 923 transitions, 21550 flow. Second operand has 27 states, 27 states have (on average 4.7407407407407405) internal successors, (128), 27 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:11:49,625 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:11:49,625 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-06-27 17:11:49,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:11:52,403 INFO L124 PetriNetUnfolderBase]: 2621/5441 cut-off events. [2024-06-27 17:11:52,403 INFO L125 PetriNetUnfolderBase]: For 341628/341628 co-relation queries the response was YES. [2024-06-27 17:11:52,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60553 conditions, 5441 events. 2621/5441 cut-off events. For 341628/341628 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 43777 event pairs, 234 based on Foata normal form. 3/5444 useless extension candidates. Maximal degree in co-relation 60282. Up to 4718 conditions per place. [2024-06-27 17:11:52,477 INFO L140 encePairwiseOnDemand]: 10/20 looper letters, 875 selfloop transitions, 158 changer transitions 5/1039 dead transitions. [2024-06-27 17:11:52,478 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 535 places, 1039 transitions, 25275 flow [2024-06-27 17:11:52,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-06-27 17:11:52,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2024-06-27 17:11:52,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 251 transitions. [2024-06-27 17:11:52,479 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3803030303030303 [2024-06-27 17:11:52,479 INFO L175 Difference]: Start difference. First operand has 504 places, 923 transitions, 21550 flow. Second operand 33 states and 251 transitions. [2024-06-27 17:11:52,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 535 places, 1039 transitions, 25275 flow [2024-06-27 17:11:54,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 519 places, 1039 transitions, 24824 flow, removed 173 selfloop flow, removed 16 redundant places. [2024-06-27 17:11:54,474 INFO L231 Difference]: Finished difference. Result has 528 places, 952 transitions, 22393 flow [2024-06-27 17:11:54,474 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=21103, PETRI_DIFFERENCE_MINUEND_PLACES=487, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=923, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=772, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=22393, PETRI_PLACES=528, PETRI_TRANSITIONS=952} [2024-06-27 17:11:54,475 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 507 predicate places. [2024-06-27 17:11:54,475 INFO L495 AbstractCegarLoop]: Abstraction has has 528 places, 952 transitions, 22393 flow [2024-06-27 17:11:54,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.7407407407407405) internal successors, (128), 27 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:11:54,475 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:11:54,476 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:11:54,488 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2024-06-27 17:11:54,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2024-06-27 17:11:54,678 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:11:54,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:11:54,678 INFO L85 PathProgramCache]: Analyzing trace with hash -102073580, now seen corresponding path program 16 times [2024-06-27 17:11:54,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:11:54,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791582555] [2024-06-27 17:11:54,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:11:54,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:11:54,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:11:55,121 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:11:55,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:11:55,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791582555] [2024-06-27 17:11:55,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791582555] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:11:55,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255375470] [2024-06-27 17:11:55,122 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 17:11:55,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:11:55,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:11:55,124 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:11:55,125 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2024-06-27 17:11:55,202 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 17:11:55,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:11:55,203 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 29 conjunts are in the unsatisfiable core [2024-06-27 17:11:55,204 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:11:55,383 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:11:55,383 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 22 [2024-06-27 17:11:55,388 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 17:11:55,388 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:11:55,605 INFO L349 Elim1Store]: treesize reduction 10, result has 90.5 percent of original size [2024-06-27 17:11:55,605 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 125 [2024-06-27 17:11:55,701 INFO L349 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2024-06-27 17:11:55,701 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2024-06-27 17:11:55,768 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:11:55,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255375470] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:11:55,768 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:11:55,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 8] total 26 [2024-06-27 17:11:55,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959083927] [2024-06-27 17:11:55,768 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:11:55,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-06-27 17:11:55,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:11:55,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-06-27 17:11:55,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2024-06-27 17:11:55,770 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-06-27 17:11:55,770 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 528 places, 952 transitions, 22393 flow. Second operand has 27 states, 27 states have (on average 4.7407407407407405) internal successors, (128), 27 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:11:55,770 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:11:55,770 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-06-27 17:11:55,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:11:58,500 INFO L124 PetriNetUnfolderBase]: 2632/5463 cut-off events. [2024-06-27 17:11:58,500 INFO L125 PetriNetUnfolderBase]: For 353777/353777 co-relation queries the response was YES. [2024-06-27 17:11:58,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61531 conditions, 5463 events. 2632/5463 cut-off events. For 353777/353777 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 44319 event pairs, 257 based on Foata normal form. 5/5468 useless extension candidates. Maximal degree in co-relation 61252. Up to 5035 conditions per place. [2024-06-27 17:11:58,586 INFO L140 encePairwiseOnDemand]: 9/20 looper letters, 905 selfloop transitions, 107 changer transitions 12/1025 dead transitions. [2024-06-27 17:11:58,587 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 558 places, 1025 transitions, 25303 flow [2024-06-27 17:11:58,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-06-27 17:11:58,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2024-06-27 17:11:58,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 262 transitions. [2024-06-27 17:11:58,588 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.409375 [2024-06-27 17:11:58,588 INFO L175 Difference]: Start difference. First operand has 528 places, 952 transitions, 22393 flow. Second operand 32 states and 262 transitions. [2024-06-27 17:11:58,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 558 places, 1025 transitions, 25303 flow [2024-06-27 17:12:00,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 542 places, 1025 transitions, 24903 flow, removed 155 selfloop flow, removed 16 redundant places. [2024-06-27 17:12:00,709 INFO L231 Difference]: Finished difference. Result has 548 places, 955 transitions, 22439 flow [2024-06-27 17:12:00,710 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=22003, PETRI_DIFFERENCE_MINUEND_PLACES=511, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=952, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=845, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=22439, PETRI_PLACES=548, PETRI_TRANSITIONS=955} [2024-06-27 17:12:00,710 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 527 predicate places. [2024-06-27 17:12:00,710 INFO L495 AbstractCegarLoop]: Abstraction has has 548 places, 955 transitions, 22439 flow [2024-06-27 17:12:00,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.7407407407407405) internal successors, (128), 27 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:12:00,711 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:12:00,711 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:12:00,722 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2024-06-27 17:12:00,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2024-06-27 17:12:00,911 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:12:00,911 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:12:00,912 INFO L85 PathProgramCache]: Analyzing trace with hash 1780620762, now seen corresponding path program 12 times [2024-06-27 17:12:00,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:12:00,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227532926] [2024-06-27 17:12:00,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:12:00,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:12:00,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:12:01,030 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:12:01,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:12:01,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227532926] [2024-06-27 17:12:01,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227532926] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:12:01,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68764096] [2024-06-27 17:12:01,031 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-27 17:12:01,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:12:01,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:12:01,032 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:12:01,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2024-06-27 17:12:01,140 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-06-27 17:12:01,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:12:01,142 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2024-06-27 17:12:01,142 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:12:01,185 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:12:01,185 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:12:01,406 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:12:01,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68764096] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:12:01,406 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:12:01,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2024-06-27 17:12:01,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607000705] [2024-06-27 17:12:01,406 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:12:01,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-06-27 17:12:01,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:12:01,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-06-27 17:12:01,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2024-06-27 17:12:01,407 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-06-27 17:12:01,408 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 548 places, 955 transitions, 22439 flow. Second operand has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 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 17:12:01,408 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:12:01,408 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-06-27 17:12:01,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:12:07,062 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-06-27 17:12:09,361 INFO L124 PetriNetUnfolderBase]: 2729/5614 cut-off events. [2024-06-27 17:12:09,361 INFO L125 PetriNetUnfolderBase]: For 355983/355983 co-relation queries the response was YES. [2024-06-27 17:12:09,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63218 conditions, 5614 events. 2729/5614 cut-off events. For 355983/355983 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 45202 event pairs, 490 based on Foata normal form. 30/5644 useless extension candidates. Maximal degree in co-relation 62874. Up to 2229 conditions per place. [2024-06-27 17:12:09,446 INFO L140 encePairwiseOnDemand]: 13/20 looper letters, 602 selfloop transitions, 491 changer transitions 5/1099 dead transitions. [2024-06-27 17:12:09,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 580 places, 1099 transitions, 26694 flow [2024-06-27 17:12:09,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-06-27 17:12:09,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2024-06-27 17:12:09,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 275 transitions. [2024-06-27 17:12:09,447 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40441176470588236 [2024-06-27 17:12:09,447 INFO L175 Difference]: Start difference. First operand has 548 places, 955 transitions, 22439 flow. Second operand 34 states and 275 transitions. [2024-06-27 17:12:09,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 580 places, 1099 transitions, 26694 flow [2024-06-27 17:12:12,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 553 places, 1099 transitions, 26315 flow, removed 97 selfloop flow, removed 27 redundant places. [2024-06-27 17:12:12,035 INFO L231 Difference]: Finished difference. Result has 556 places, 999 transitions, 24341 flow [2024-06-27 17:12:12,035 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=22048, PETRI_DIFFERENCE_MINUEND_PLACES=520, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=953, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=450, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=500, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=24341, PETRI_PLACES=556, PETRI_TRANSITIONS=999} [2024-06-27 17:12:12,036 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 535 predicate places. [2024-06-27 17:12:12,036 INFO L495 AbstractCegarLoop]: Abstraction has has 556 places, 999 transitions, 24341 flow [2024-06-27 17:12:12,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 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 17:12:12,036 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:12:12,036 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:12:12,048 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2024-06-27 17:12:12,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:12:12,237 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:12:12,237 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:12:12,237 INFO L85 PathProgramCache]: Analyzing trace with hash 914507019, now seen corresponding path program 17 times [2024-06-27 17:12:12,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:12:12,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763375460] [2024-06-27 17:12:12,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:12:12,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:12:12,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:12:12,359 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:12:12,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:12:12,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763375460] [2024-06-27 17:12:12,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763375460] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:12:12,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620303961] [2024-06-27 17:12:12,360 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-27 17:12:12,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:12:12,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:12:12,361 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:12:12,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2024-06-27 17:12:12,496 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 17:12:12,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:12:12,497 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 14 conjunts are in the unsatisfiable core [2024-06-27 17:12:12,498 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:12:12,556 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:12:12,556 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:12:12,758 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:12:12,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620303961] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:12:12,758 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:12:12,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2024-06-27 17:12:12,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163685543] [2024-06-27 17:12:12,759 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:12:12,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-06-27 17:12:12,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:12:12,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-06-27 17:12:12,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2024-06-27 17:12:12,759 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-06-27 17:12:12,760 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 556 places, 999 transitions, 24341 flow. Second operand has 17 states, 17 states have (on average 4.647058823529412) internal successors, (79), 17 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:12:12,760 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:12:12,760 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-06-27 17:12:12,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:12:20,575 INFO L124 PetriNetUnfolderBase]: 2731/5564 cut-off events. [2024-06-27 17:12:20,575 INFO L125 PetriNetUnfolderBase]: For 355912/355912 co-relation queries the response was YES. [2024-06-27 17:12:20,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63911 conditions, 5564 events. 2731/5564 cut-off events. For 355912/355912 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 44608 event pairs, 475 based on Foata normal form. 18/5582 useless extension candidates. Maximal degree in co-relation 63564. Up to 2296 conditions per place. [2024-06-27 17:12:20,666 INFO L140 encePairwiseOnDemand]: 13/20 looper letters, 625 selfloop transitions, 433 changer transitions 0/1059 dead transitions. [2024-06-27 17:12:20,666 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 583 places, 1059 transitions, 26955 flow [2024-06-27 17:12:20,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-06-27 17:12:20,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2024-06-27 17:12:20,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 241 transitions. [2024-06-27 17:12:20,667 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38870967741935486 [2024-06-27 17:12:20,667 INFO L175 Difference]: Start difference. First operand has 556 places, 999 transitions, 24341 flow. Second operand 31 states and 241 transitions. [2024-06-27 17:12:20,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 583 places, 1059 transitions, 26955 flow [2024-06-27 17:12:23,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 561 places, 1059 transitions, 25564 flow, removed 248 selfloop flow, removed 22 redundant places. [2024-06-27 17:12:23,254 INFO L231 Difference]: Finished difference. Result has 563 places, 1005 transitions, 24126 flow [2024-06-27 17:12:23,255 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=22920, PETRI_DIFFERENCE_MINUEND_PLACES=531, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=996, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=424, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=564, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=24126, PETRI_PLACES=563, PETRI_TRANSITIONS=1005} [2024-06-27 17:12:23,256 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 542 predicate places. [2024-06-27 17:12:23,256 INFO L495 AbstractCegarLoop]: Abstraction has has 563 places, 1005 transitions, 24126 flow [2024-06-27 17:12:23,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.647058823529412) internal successors, (79), 17 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:12:23,256 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:12:23,256 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:12:23,268 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2024-06-27 17:12:23,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:12:23,468 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:12:23,468 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:12:23,468 INFO L85 PathProgramCache]: Analyzing trace with hash 1162151745, now seen corresponding path program 18 times [2024-06-27 17:12:23,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:12:23,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888174170] [2024-06-27 17:12:23,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:12:23,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:12:23,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:12:23,606 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:12:23,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:12:23,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888174170] [2024-06-27 17:12:23,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888174170] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:12:23,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274041076] [2024-06-27 17:12:23,607 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-27 17:12:23,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:12:23,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:12:23,608 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:12:23,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2024-06-27 17:12:23,704 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-06-27 17:12:23,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:12:23,705 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 14 conjunts are in the unsatisfiable core [2024-06-27 17:12:23,706 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:12:23,768 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:12:23,768 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:12:23,854 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-06-27 17:12:23,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274041076] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:12:23,854 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:12:23,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 6] total 16 [2024-06-27 17:12:23,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631059347] [2024-06-27 17:12:23,855 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:12:23,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-06-27 17:12:23,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:12:23,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-06-27 17:12:23,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2024-06-27 17:12:23,855 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-06-27 17:12:23,856 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 563 places, 1005 transitions, 24126 flow. Second operand has 16 states, 16 states have (on average 5.0) internal successors, (80), 16 states have internal predecessors, (80), 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 17:12:23,856 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:12:23,856 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-06-27 17:12:23,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:12:26,837 INFO L124 PetriNetUnfolderBase]: 2811/5751 cut-off events. [2024-06-27 17:12:26,837 INFO L125 PetriNetUnfolderBase]: For 379959/379959 co-relation queries the response was YES. [2024-06-27 17:12:26,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65789 conditions, 5751 events. 2811/5751 cut-off events. For 379959/379959 co-relation queries the response was YES. Maximal size of possible extension queue 459. Compared 46530 event pairs, 46 based on Foata normal form. 22/5773 useless extension candidates. Maximal degree in co-relation 65381. Up to 2756 conditions per place. [2024-06-27 17:12:27,103 INFO L140 encePairwiseOnDemand]: 13/20 looper letters, 511 selfloop transitions, 629 changer transitions 2/1143 dead transitions. [2024-06-27 17:12:27,103 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 593 places, 1143 transitions, 29286 flow [2024-06-27 17:12:27,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-06-27 17:12:27,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2024-06-27 17:12:27,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 252 transitions. [2024-06-27 17:12:27,104 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4064516129032258 [2024-06-27 17:12:27,104 INFO L175 Difference]: Start difference. First operand has 563 places, 1005 transitions, 24126 flow. Second operand 31 states and 252 transitions. [2024-06-27 17:12:27,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 593 places, 1143 transitions, 29286 flow [2024-06-27 17:12:29,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 573 places, 1143 transitions, 28817 flow, removed 25 selfloop flow, removed 20 redundant places. [2024-06-27 17:12:29,680 INFO L231 Difference]: Finished difference. Result has 581 places, 1053 transitions, 26892 flow [2024-06-27 17:12:29,681 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=23633, PETRI_DIFFERENCE_MINUEND_PLACES=543, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1003, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=579, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=404, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=26892, PETRI_PLACES=581, PETRI_TRANSITIONS=1053} [2024-06-27 17:12:29,681 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 560 predicate places. [2024-06-27 17:12:29,682 INFO L495 AbstractCegarLoop]: Abstraction has has 581 places, 1053 transitions, 26892 flow [2024-06-27 17:12:29,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.0) internal successors, (80), 16 states have internal predecessors, (80), 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 17:12:29,682 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:12:29,682 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:12:29,695 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2024-06-27 17:12:29,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2024-06-27 17:12:29,882 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:12:29,883 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:12:29,883 INFO L85 PathProgramCache]: Analyzing trace with hash 1456908606, now seen corresponding path program 19 times [2024-06-27 17:12:29,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:12:29,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179262258] [2024-06-27 17:12:29,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:12:29,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:12:29,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:12:30,432 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:12:30,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:12:30,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179262258] [2024-06-27 17:12:30,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179262258] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:12:30,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018070378] [2024-06-27 17:12:30,433 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-06-27 17:12:30,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:12:30,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:12:30,434 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:12:30,434 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2024-06-27 17:12:30,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:12:30,508 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 29 conjunts are in the unsatisfiable core [2024-06-27 17:12:30,509 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:12:30,690 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:12:30,690 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 22 [2024-06-27 17:12:30,694 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 17:12:30,694 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:12:30,968 INFO L349 Elim1Store]: treesize reduction 10, result has 90.5 percent of original size [2024-06-27 17:12:30,969 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 125 [2024-06-27 17:12:31,074 INFO L349 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2024-06-27 17:12:31,074 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2024-06-27 17:12:31,162 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:12:31,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018070378] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:12:31,162 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:12:31,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 8] total 26 [2024-06-27 17:12:31,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565760949] [2024-06-27 17:12:31,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:12:31,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-06-27 17:12:31,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:12:31,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-06-27 17:12:31,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2024-06-27 17:12:31,163 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-06-27 17:12:31,164 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 581 places, 1053 transitions, 26892 flow. Second operand has 27 states, 27 states have (on average 4.814814814814815) internal successors, (130), 27 states have internal predecessors, (130), 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 17:12:31,164 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:12:31,164 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-06-27 17:12:31,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:12:34,418 INFO L124 PetriNetUnfolderBase]: 2861/5828 cut-off events. [2024-06-27 17:12:34,419 INFO L125 PetriNetUnfolderBase]: For 404552/404552 co-relation queries the response was YES. [2024-06-27 17:12:34,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68894 conditions, 5828 events. 2861/5828 cut-off events. For 404552/404552 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 47137 event pairs, 267 based on Foata normal form. 4/5832 useless extension candidates. Maximal degree in co-relation 68503. Up to 5455 conditions per place. [2024-06-27 17:12:34,519 INFO L140 encePairwiseOnDemand]: 9/20 looper letters, 1035 selfloop transitions, 91 changer transitions 11/1138 dead transitions. [2024-06-27 17:12:34,519 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 609 places, 1138 transitions, 30690 flow [2024-06-27 17:12:34,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-06-27 17:12:34,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2024-06-27 17:12:34,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 234 transitions. [2024-06-27 17:12:34,520 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39 [2024-06-27 17:12:34,520 INFO L175 Difference]: Start difference. First operand has 581 places, 1053 transitions, 26892 flow. Second operand 30 states and 234 transitions. [2024-06-27 17:12:34,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 609 places, 1138 transitions, 30690 flow [2024-06-27 17:12:38,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 596 places, 1138 transitions, 28633 flow, removed 695 selfloop flow, removed 13 redundant places. [2024-06-27 17:12:38,873 INFO L231 Difference]: Finished difference. Result has 606 places, 1081 transitions, 26198 flow [2024-06-27 17:12:38,874 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=25045, PETRI_DIFFERENCE_MINUEND_PLACES=567, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1053, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=970, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=26198, PETRI_PLACES=606, PETRI_TRANSITIONS=1081} [2024-06-27 17:12:38,874 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 585 predicate places. [2024-06-27 17:12:38,874 INFO L495 AbstractCegarLoop]: Abstraction has has 606 places, 1081 transitions, 26198 flow [2024-06-27 17:12:38,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.814814814814815) internal successors, (130), 27 states have internal predecessors, (130), 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 17:12:38,875 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:12:38,875 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:12:38,885 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2024-06-27 17:12:39,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2024-06-27 17:12:39,075 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:12:39,076 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:12:39,076 INFO L85 PathProgramCache]: Analyzing trace with hash 362896783, now seen corresponding path program 20 times [2024-06-27 17:12:39,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:12:39,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970971694] [2024-06-27 17:12:39,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:12:39,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:12:39,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:12:39,155 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:12:39,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:12:39,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970971694] [2024-06-27 17:12:39,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970971694] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:12:39,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994453207] [2024-06-27 17:12:39,156 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 17:12:39,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:12:39,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:12:39,173 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:12:39,188 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2024-06-27 17:12:39,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 17:12:39,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:12:39,288 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 12 conjunts are in the unsatisfiable core [2024-06-27 17:12:39,288 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:12:39,321 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:12:39,321 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:12:39,373 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-06-27 17:12:39,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994453207] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:12:39,374 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:12:39,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 5] total 11 [2024-06-27 17:12:39,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892637567] [2024-06-27 17:12:39,374 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:12:39,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 17:12:39,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:12:39,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 17:12:39,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-27 17:12:39,374 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-06-27 17:12:39,375 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 606 places, 1081 transitions, 26198 flow. Second operand has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 11 states have internal predecessors, (59), 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 17:12:39,375 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:12:39,375 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-06-27 17:12:39,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:12:42,090 INFO L124 PetriNetUnfolderBase]: 2938/5921 cut-off events. [2024-06-27 17:12:42,091 INFO L125 PetriNetUnfolderBase]: For 295315/295315 co-relation queries the response was YES. [2024-06-27 17:12:42,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65489 conditions, 5921 events. 2938/5921 cut-off events. For 295315/295315 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 47501 event pairs, 114 based on Foata normal form. 48/5969 useless extension candidates. Maximal degree in co-relation 65077. Up to 2396 conditions per place. [2024-06-27 17:12:42,370 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 784 selfloop transitions, 418 changer transitions 2/1205 dead transitions. [2024-06-27 17:12:42,370 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 617 places, 1205 transitions, 31214 flow [2024-06-27 17:12:42,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-06-27 17:12:42,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-06-27 17:12:42,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 139 transitions. [2024-06-27 17:12:42,371 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4088235294117647 [2024-06-27 17:12:42,371 INFO L175 Difference]: Start difference. First operand has 606 places, 1081 transitions, 26198 flow. Second operand 17 states and 139 transitions. [2024-06-27 17:12:42,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 617 places, 1205 transitions, 31214 flow [2024-06-27 17:12:44,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 600 places, 1205 transitions, 30430 flow, removed 212 selfloop flow, removed 17 redundant places. [2024-06-27 17:12:44,931 INFO L231 Difference]: Finished difference. Result has 604 places, 1105 transitions, 27263 flow [2024-06-27 17:12:44,932 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=25123, PETRI_DIFFERENCE_MINUEND_PLACES=584, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1070, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=392, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=665, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=27263, PETRI_PLACES=604, PETRI_TRANSITIONS=1105} [2024-06-27 17:12:44,932 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 583 predicate places. [2024-06-27 17:12:44,932 INFO L495 AbstractCegarLoop]: Abstraction has has 604 places, 1105 transitions, 27263 flow [2024-06-27 17:12:44,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 11 states have internal predecessors, (59), 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 17:12:44,932 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:12:44,932 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:12:44,943 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2024-06-27 17:12:45,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2024-06-27 17:12:45,133 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:12:45,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:12:45,133 INFO L85 PathProgramCache]: Analyzing trace with hash 1274274496, now seen corresponding path program 13 times [2024-06-27 17:12:45,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:12:45,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891537309] [2024-06-27 17:12:45,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:12:45,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:12:45,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:12:45,242 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:12:45,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:12:45,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891537309] [2024-06-27 17:12:45,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891537309] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:12:45,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587049742] [2024-06-27 17:12:45,242 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-06-27 17:12:45,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:12:45,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:12:45,243 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:12:45,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2024-06-27 17:12:45,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:12:45,352 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 13 conjunts are in the unsatisfiable core [2024-06-27 17:12:45,364 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:12:45,413 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:12:45,413 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:12:45,555 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:12:45,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587049742] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:12:45,555 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:12:45,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2024-06-27 17:12:45,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24157432] [2024-06-27 17:12:45,555 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:12:45,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-06-27 17:12:45,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:12:45,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-06-27 17:12:45,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2024-06-27 17:12:45,556 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-06-27 17:12:45,556 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 604 places, 1105 transitions, 27263 flow. Second operand has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 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 17:12:45,556 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:12:45,556 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-06-27 17:12:45,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:12:49,317 INFO L124 PetriNetUnfolderBase]: 3094/6263 cut-off events. [2024-06-27 17:12:49,317 INFO L125 PetriNetUnfolderBase]: For 303057/303057 co-relation queries the response was YES. [2024-06-27 17:12:49,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69535 conditions, 6263 events. 3094/6263 cut-off events. For 303057/303057 co-relation queries the response was YES. Maximal size of possible extension queue 516. Compared 51122 event pairs, 894 based on Foata normal form. 36/6299 useless extension candidates. Maximal degree in co-relation 69162. Up to 4708 conditions per place. [2024-06-27 17:12:49,421 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 841 selfloop transitions, 413 changer transitions 0/1255 dead transitions. [2024-06-27 17:12:49,421 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 632 places, 1255 transitions, 32471 flow [2024-06-27 17:12:49,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-06-27 17:12:49,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2024-06-27 17:12:49,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 232 transitions. [2024-06-27 17:12:49,428 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-27 17:12:49,428 INFO L175 Difference]: Start difference. First operand has 604 places, 1105 transitions, 27263 flow. Second operand 29 states and 232 transitions. [2024-06-27 17:12:49,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 632 places, 1255 transitions, 32471 flow [2024-06-27 17:12:52,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 625 places, 1255 transitions, 31848 flow, removed 144 selfloop flow, removed 7 redundant places. [2024-06-27 17:12:52,226 INFO L231 Difference]: Finished difference. Result has 633 places, 1160 transitions, 29483 flow [2024-06-27 17:12:52,227 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=26633, PETRI_DIFFERENCE_MINUEND_PLACES=597, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=366, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=706, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=29483, PETRI_PLACES=633, PETRI_TRANSITIONS=1160} [2024-06-27 17:12:52,227 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 612 predicate places. [2024-06-27 17:12:52,227 INFO L495 AbstractCegarLoop]: Abstraction has has 633 places, 1160 transitions, 29483 flow [2024-06-27 17:12:52,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 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 17:12:52,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:12:52,227 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:12:52,238 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2024-06-27 17:12:52,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:12:52,428 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:12:52,428 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:12:52,428 INFO L85 PathProgramCache]: Analyzing trace with hash -608419846, now seen corresponding path program 21 times [2024-06-27 17:12:52,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:12:52,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216489918] [2024-06-27 17:12:52,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:12:52,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:12:52,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:12:52,926 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:12:52,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:12:52,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216489918] [2024-06-27 17:12:52,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216489918] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:12:52,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258522127] [2024-06-27 17:12:52,927 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 17:12:52,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:12:52,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:12:52,928 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:12:52,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2024-06-27 17:12:53,003 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-06-27 17:12:53,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:12:53,004 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 33 conjunts are in the unsatisfiable core [2024-06-27 17:12:53,005 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:12:53,211 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:12:53,211 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 20 [2024-06-27 17:12:53,215 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 17:12:53,215 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:12:53,415 INFO L349 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2024-06-27 17:12:53,415 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2024-06-27 17:12:53,466 INFO L349 Elim1Store]: treesize reduction 74, result has 29.5 percent of original size [2024-06-27 17:12:53,467 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 61 [2024-06-27 17:12:53,527 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:12:53,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258522127] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:12:53,527 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:12:53,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 8] total 27 [2024-06-27 17:12:53,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211924381] [2024-06-27 17:12:53,527 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:12:53,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-06-27 17:12:53,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:12:53,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-06-27 17:12:53,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=645, Unknown=0, NotChecked=0, Total=756 [2024-06-27 17:12:53,528 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-06-27 17:12:53,529 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 633 places, 1160 transitions, 29483 flow. Second operand has 28 states, 28 states have (on average 4.678571428571429) internal successors, (131), 28 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 17:12:53,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:12:53,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-06-27 17:12:53,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:12:56,957 INFO L124 PetriNetUnfolderBase]: 3140/6349 cut-off events. [2024-06-27 17:12:56,958 INFO L125 PetriNetUnfolderBase]: For 282487/282487 co-relation queries the response was YES. [2024-06-27 17:12:57,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70645 conditions, 6349 events. 3140/6349 cut-off events. For 282487/282487 co-relation queries the response was YES. Maximal size of possible extension queue 528. Compared 51748 event pairs, 277 based on Foata normal form. 6/6355 useless extension candidates. Maximal degree in co-relation 70270. Up to 5892 conditions per place. [2024-06-27 17:12:57,073 INFO L140 encePairwiseOnDemand]: 9/20 looper letters, 1115 selfloop transitions, 122 changer transitions 13/1251 dead transitions. [2024-06-27 17:12:57,073 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 666 places, 1251 transitions, 33294 flow [2024-06-27 17:12:57,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-06-27 17:12:57,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2024-06-27 17:12:57,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 272 transitions. [2024-06-27 17:12:57,074 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-27 17:12:57,074 INFO L175 Difference]: Start difference. First operand has 633 places, 1160 transitions, 29483 flow. Second operand 34 states and 272 transitions. [2024-06-27 17:12:57,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 666 places, 1251 transitions, 33294 flow [2024-06-27 17:13:00,078 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 650 places, 1251 transitions, 32628 flow, removed 111 selfloop flow, removed 16 redundant places. [2024-06-27 17:13:00,100 INFO L231 Difference]: Finished difference. Result has 661 places, 1182 transitions, 29897 flow [2024-06-27 17:13:00,101 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=28839, PETRI_DIFFERENCE_MINUEND_PLACES=617, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1039, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=29897, PETRI_PLACES=661, PETRI_TRANSITIONS=1182} [2024-06-27 17:13:00,102 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 640 predicate places. [2024-06-27 17:13:00,102 INFO L495 AbstractCegarLoop]: Abstraction has has 661 places, 1182 transitions, 29897 flow [2024-06-27 17:13:00,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 4.678571428571429) internal successors, (131), 28 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 17:13:00,102 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:13:00,102 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:13:00,115 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2024-06-27 17:13:00,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:13:00,312 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:13:00,312 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:13:00,313 INFO L85 PathProgramCache]: Analyzing trace with hash -1109011356, now seen corresponding path program 22 times [2024-06-27 17:13:00,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:13:00,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145382040] [2024-06-27 17:13:00,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:13:00,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:13:00,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:13:00,810 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:13:00,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:13:00,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145382040] [2024-06-27 17:13:00,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145382040] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:13:00,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238032921] [2024-06-27 17:13:00,811 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 17:13:00,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:13:00,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:13:00,812 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:13:00,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2024-06-27 17:13:00,895 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 17:13:00,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:13:00,897 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 29 conjunts are in the unsatisfiable core [2024-06-27 17:13:00,898 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:13:01,067 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:13:01,067 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 22 [2024-06-27 17:13:01,071 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 17:13:01,071 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:13:01,310 INFO L349 Elim1Store]: treesize reduction 10, result has 90.5 percent of original size [2024-06-27 17:13:01,311 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 125 [2024-06-27 17:13:01,410 INFO L349 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2024-06-27 17:13:01,410 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2024-06-27 17:13:01,484 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:13:01,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [238032921] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:13:01,485 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:13:01,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 8] total 26 [2024-06-27 17:13:01,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131080468] [2024-06-27 17:13:01,485 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:13:01,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-06-27 17:13:01,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:13:01,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-06-27 17:13:01,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2024-06-27 17:13:01,486 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-06-27 17:13:01,486 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 661 places, 1182 transitions, 29897 flow. Second operand has 27 states, 27 states have (on average 4.814814814814815) internal successors, (130), 27 states have internal predecessors, (130), 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 17:13:01,486 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:13:01,487 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-06-27 17:13:01,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:13:05,020 INFO L124 PetriNetUnfolderBase]: 3153/6351 cut-off events. [2024-06-27 17:13:05,021 INFO L125 PetriNetUnfolderBase]: For 294055/294055 co-relation queries the response was YES. [2024-06-27 17:13:05,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71005 conditions, 6351 events. 3153/6351 cut-off events. For 294055/294055 co-relation queries the response was YES. Maximal size of possible extension queue 512. Compared 51472 event pairs, 271 based on Foata normal form. 5/6356 useless extension candidates. Maximal degree in co-relation 70617. Up to 5949 conditions per place. [2024-06-27 17:13:05,134 INFO L140 encePairwiseOnDemand]: 9/20 looper letters, 1150 selfloop transitions, 91 changer transitions 13/1255 dead transitions. [2024-06-27 17:13:05,135 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 689 places, 1255 transitions, 33179 flow [2024-06-27 17:13:05,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-06-27 17:13:05,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2024-06-27 17:13:05,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 237 transitions. [2024-06-27 17:13:05,137 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.395 [2024-06-27 17:13:05,137 INFO L175 Difference]: Start difference. First operand has 661 places, 1182 transitions, 29897 flow. Second operand 30 states and 237 transitions. [2024-06-27 17:13:05,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 689 places, 1255 transitions, 33179 flow [2024-06-27 17:13:08,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 668 places, 1255 transitions, 32738 flow, removed 168 selfloop flow, removed 21 redundant places. [2024-06-27 17:13:08,301 INFO L231 Difference]: Finished difference. Result has 675 places, 1191 transitions, 30028 flow [2024-06-27 17:13:08,302 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=29456, PETRI_DIFFERENCE_MINUEND_PLACES=639, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1091, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=30028, PETRI_PLACES=675, PETRI_TRANSITIONS=1191} [2024-06-27 17:13:08,302 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 654 predicate places. [2024-06-27 17:13:08,302 INFO L495 AbstractCegarLoop]: Abstraction has has 675 places, 1191 transitions, 30028 flow [2024-06-27 17:13:08,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.814814814814815) internal successors, (130), 27 states have internal predecessors, (130), 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 17:13:08,303 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:13:08,303 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:13:08,315 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2024-06-27 17:13:08,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:13:08,504 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:13:08,504 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:13:08,504 INFO L85 PathProgramCache]: Analyzing trace with hash -109716276, now seen corresponding path program 23 times [2024-06-27 17:13:08,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:13:08,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205707188] [2024-06-27 17:13:08,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:13:08,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:13:08,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:13:09,012 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:13:09,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:13:09,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205707188] [2024-06-27 17:13:09,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205707188] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:13:09,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038052816] [2024-06-27 17:13:09,013 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-27 17:13:09,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:13:09,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:13:09,014 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:13:09,044 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2024-06-27 17:13:09,098 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 17:13:09,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:13:09,100 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 31 conjunts are in the unsatisfiable core [2024-06-27 17:13:09,101 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:13:09,318 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:13:09,319 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 82 treesize of output 64 [2024-06-27 17:13:09,374 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 17:13:09,375 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:13:09,649 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:13:09,649 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 127 treesize of output 152 [2024-06-27 17:13:09,887 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:13:09,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038052816] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:13:09,888 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:13:09,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 9] total 26 [2024-06-27 17:13:09,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113749553] [2024-06-27 17:13:09,888 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:13:09,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-06-27 17:13:09,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:13:09,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-06-27 17:13:09,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=599, Unknown=0, NotChecked=0, Total=702 [2024-06-27 17:13:09,889 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-06-27 17:13:09,889 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 675 places, 1191 transitions, 30028 flow. Second operand has 27 states, 27 states have (on average 4.7407407407407405) internal successors, (128), 27 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:13:09,889 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:13:09,889 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-06-27 17:13:09,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:13:13,279 INFO L124 PetriNetUnfolderBase]: 3180/6374 cut-off events. [2024-06-27 17:13:13,280 INFO L125 PetriNetUnfolderBase]: For 295151/295151 co-relation queries the response was YES. [2024-06-27 17:13:13,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71516 conditions, 6374 events. 3180/6374 cut-off events. For 295151/295151 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 51396 event pairs, 264 based on Foata normal form. 1/6375 useless extension candidates. Maximal degree in co-relation 71124. Up to 5902 conditions per place. [2024-06-27 17:13:13,389 INFO L140 encePairwiseOnDemand]: 10/20 looper letters, 1117 selfloop transitions, 135 changer transitions 4/1257 dead transitions. [2024-06-27 17:13:13,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 700 places, 1257 transitions, 33477 flow [2024-06-27 17:13:13,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-06-27 17:13:13,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-06-27 17:13:13,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 201 transitions. [2024-06-27 17:13:13,390 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37222222222222223 [2024-06-27 17:13:13,390 INFO L175 Difference]: Start difference. First operand has 675 places, 1191 transitions, 30028 flow. Second operand 27 states and 201 transitions. [2024-06-27 17:13:13,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 700 places, 1257 transitions, 33477 flow [2024-06-27 17:13:16,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 677 places, 1257 transitions, 33146 flow, removed 93 selfloop flow, removed 23 redundant places. [2024-06-27 17:13:16,455 INFO L231 Difference]: Finished difference. Result has 680 places, 1218 transitions, 30769 flow [2024-06-27 17:13:16,456 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=29697, PETRI_DIFFERENCE_MINUEND_PLACES=651, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1078, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=30769, PETRI_PLACES=680, PETRI_TRANSITIONS=1218} [2024-06-27 17:13:16,456 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 659 predicate places. [2024-06-27 17:13:16,456 INFO L495 AbstractCegarLoop]: Abstraction has has 680 places, 1218 transitions, 30769 flow [2024-06-27 17:13:16,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.7407407407407405) internal successors, (128), 27 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:13:16,456 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:13:16,456 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:13:16,467 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2024-06-27 17:13:16,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2024-06-27 17:13:16,657 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:13:16,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:13:16,657 INFO L85 PathProgramCache]: Analyzing trace with hash -705662484, now seen corresponding path program 14 times [2024-06-27 17:13:16,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:13:16,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953692129] [2024-06-27 17:13:16,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:13:16,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:13:16,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:13:16,778 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:13:16,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:13:16,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953692129] [2024-06-27 17:13:16,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953692129] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:13:16,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569494082] [2024-06-27 17:13:16,779 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 17:13:16,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:13:16,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:13:16,780 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:13:16,781 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2024-06-27 17:13:16,880 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 17:13:16,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:13:16,881 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 13 conjunts are in the unsatisfiable core [2024-06-27 17:13:16,882 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:13:16,926 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:13:16,926 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:13:17,037 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:13:17,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569494082] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:13:17,037 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:13:17,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2024-06-27 17:13:17,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439351404] [2024-06-27 17:13:17,037 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:13:17,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-06-27 17:13:17,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:13:17,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-06-27 17:13:17,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2024-06-27 17:13:17,038 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-06-27 17:13:17,038 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 680 places, 1218 transitions, 30769 flow. Second operand has 15 states, 15 states have (on average 4.8) internal successors, (72), 15 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 17:13:17,038 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:13:17,039 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-06-27 17:13:17,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:13:22,018 INFO L124 PetriNetUnfolderBase]: 3329/6660 cut-off events. [2024-06-27 17:13:22,018 INFO L125 PetriNetUnfolderBase]: For 310605/310605 co-relation queries the response was YES. [2024-06-27 17:13:22,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74336 conditions, 6660 events. 3329/6660 cut-off events. For 310605/310605 co-relation queries the response was YES. Maximal size of possible extension queue 549. Compared 54455 event pairs, 182 based on Foata normal form. 18/6678 useless extension candidates. Maximal degree in co-relation 73892. Up to 2996 conditions per place. [2024-06-27 17:13:22,145 INFO L140 encePairwiseOnDemand]: 13/20 looper letters, 607 selfloop transitions, 793 changer transitions 0/1401 dead transitions. [2024-06-27 17:13:22,146 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 713 places, 1401 transitions, 36672 flow [2024-06-27 17:13:22,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-06-27 17:13:22,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2024-06-27 17:13:22,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 281 transitions. [2024-06-27 17:13:22,147 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4014285714285714 [2024-06-27 17:13:22,147 INFO L175 Difference]: Start difference. First operand has 680 places, 1218 transitions, 30769 flow. Second operand 35 states and 281 transitions. [2024-06-27 17:13:22,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 713 places, 1401 transitions, 36672 flow [2024-06-27 17:13:25,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 700 places, 1401 transitions, 36351 flow, removed 95 selfloop flow, removed 13 redundant places. [2024-06-27 17:13:25,636 INFO L231 Difference]: Finished difference. Result has 709 places, 1298 transitions, 35205 flow [2024-06-27 17:13:25,637 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=30462, PETRI_DIFFERENCE_MINUEND_PLACES=666, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=720, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=448, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=35205, PETRI_PLACES=709, PETRI_TRANSITIONS=1298} [2024-06-27 17:13:25,637 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 688 predicate places. [2024-06-27 17:13:25,637 INFO L495 AbstractCegarLoop]: Abstraction has has 709 places, 1298 transitions, 35205 flow [2024-06-27 17:13:25,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.8) internal successors, (72), 15 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 17:13:25,638 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:13:25,638 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:13:25,649 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2024-06-27 17:13:25,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2024-06-27 17:13:25,844 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:13:25,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:13:25,845 INFO L85 PathProgramCache]: Analyzing trace with hash -681171082, now seen corresponding path program 24 times [2024-06-27 17:13:25,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:13:25,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785428183] [2024-06-27 17:13:25,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:13:25,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:13:25,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:13:26,401 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:13:26,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:13:26,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785428183] [2024-06-27 17:13:26,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785428183] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:13:26,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195283266] [2024-06-27 17:13:26,402 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-27 17:13:26,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:13:26,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:13:26,403 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:13:26,425 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2024-06-27 17:13:26,494 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-06-27 17:13:26,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:13:26,496 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 33 conjunts are in the unsatisfiable core [2024-06-27 17:13:26,497 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:13:26,759 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:13:26,760 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 60 [2024-06-27 17:13:26,838 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 17:13:26,838 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:13:27,042 INFO L349 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2024-06-27 17:13:27,042 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2024-06-27 17:13:27,091 INFO L349 Elim1Store]: treesize reduction 74, result has 29.5 percent of original size [2024-06-27 17:13:27,091 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 61 [2024-06-27 17:13:27,123 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:13:27,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195283266] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:13:27,123 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:13:27,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 8] total 26 [2024-06-27 17:13:27,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802158017] [2024-06-27 17:13:27,124 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:13:27,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-06-27 17:13:27,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:13:27,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-06-27 17:13:27,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=597, Unknown=0, NotChecked=0, Total=702 [2024-06-27 17:13:27,125 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-06-27 17:13:27,125 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 709 places, 1298 transitions, 35205 flow. Second operand has 27 states, 27 states have (on average 4.7407407407407405) internal successors, (128), 27 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:13:27,125 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:13:27,125 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-06-27 17:13:27,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:13:31,508 INFO L124 PetriNetUnfolderBase]: 3616/7259 cut-off events. [2024-06-27 17:13:31,508 INFO L125 PetriNetUnfolderBase]: For 353822/353822 co-relation queries the response was YES. [2024-06-27 17:13:31,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85138 conditions, 7259 events. 3616/7259 cut-off events. For 353822/353822 co-relation queries the response was YES. Maximal size of possible extension queue 610. Compared 60284 event pairs, 280 based on Foata normal form. 3/7262 useless extension candidates. Maximal degree in co-relation 84613. Up to 5815 conditions per place. [2024-06-27 17:13:31,637 INFO L140 encePairwiseOnDemand]: 10/20 looper letters, 1222 selfloop transitions, 316 changer transitions 6/1545 dead transitions. [2024-06-27 17:13:31,637 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 743 places, 1545 transitions, 43567 flow [2024-06-27 17:13:31,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-06-27 17:13:31,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2024-06-27 17:13:31,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 265 transitions. [2024-06-27 17:13:31,638 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37857142857142856 [2024-06-27 17:13:31,638 INFO L175 Difference]: Start difference. First operand has 709 places, 1298 transitions, 35205 flow. Second operand 35 states and 265 transitions. [2024-06-27 17:13:31,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 743 places, 1545 transitions, 43567 flow [2024-06-27 17:13:35,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 729 places, 1545 transitions, 42621 flow, removed 249 selfloop flow, removed 14 redundant places. [2024-06-27 17:13:35,706 INFO L231 Difference]: Finished difference. Result has 740 places, 1401 transitions, 38747 flow [2024-06-27 17:13:35,707 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=34513, PETRI_DIFFERENCE_MINUEND_PLACES=695, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=214, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=986, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=38747, PETRI_PLACES=740, PETRI_TRANSITIONS=1401} [2024-06-27 17:13:35,707 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 719 predicate places. [2024-06-27 17:13:35,707 INFO L495 AbstractCegarLoop]: Abstraction has has 740 places, 1401 transitions, 38747 flow [2024-06-27 17:13:35,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.7407407407407405) internal successors, (128), 27 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:13:35,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:13:35,707 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:13:35,718 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2024-06-27 17:13:35,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:13:35,908 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:13:35,908 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:13:35,908 INFO L85 PathProgramCache]: Analyzing trace with hash 845852796, now seen corresponding path program 15 times [2024-06-27 17:13:35,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:13:35,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050295836] [2024-06-27 17:13:35,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:13:35,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:13:35,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:13:36,070 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:13:36,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:13:36,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050295836] [2024-06-27 17:13:36,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050295836] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:13:36,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087297507] [2024-06-27 17:13:36,070 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 17:13:36,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:13:36,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:13:36,072 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:13:36,072 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2024-06-27 17:13:36,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-06-27 17:13:36,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:13:36,189 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2024-06-27 17:13:36,190 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:13:36,234 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:13:36,235 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:13:36,441 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:13:36,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087297507] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:13:36,441 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:13:36,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2024-06-27 17:13:36,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267382210] [2024-06-27 17:13:36,442 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:13:36,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-06-27 17:13:36,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:13:36,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-06-27 17:13:36,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2024-06-27 17:13:36,443 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-06-27 17:13:36,443 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 740 places, 1401 transitions, 38747 flow. Second operand has 16 states, 16 states have (on average 4.8125) internal successors, (77), 16 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 17:13:36,443 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:13:36,443 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-06-27 17:13:36,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:13:38,574 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-06-27 17:13:43,069 INFO L124 PetriNetUnfolderBase]: 3836/7658 cut-off events. [2024-06-27 17:13:43,070 INFO L125 PetriNetUnfolderBase]: For 403676/403676 co-relation queries the response was YES. [2024-06-27 17:13:43,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91636 conditions, 7658 events. 3836/7658 cut-off events. For 403676/403676 co-relation queries the response was YES. Maximal size of possible extension queue 621. Compared 63852 event pairs, 186 based on Foata normal form. 30/7688 useless extension candidates. Maximal degree in co-relation 91065. Up to 2026 conditions per place. [2024-06-27 17:13:43,228 INFO L140 encePairwiseOnDemand]: 13/20 looper letters, 478 selfloop transitions, 1137 changer transitions 1/1617 dead transitions. [2024-06-27 17:13:43,228 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 777 places, 1617 transitions, 46423 flow [2024-06-27 17:13:43,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-06-27 17:13:43,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2024-06-27 17:13:43,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 321 transitions. [2024-06-27 17:13:43,230 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4115384615384615 [2024-06-27 17:13:43,230 INFO L175 Difference]: Start difference. First operand has 740 places, 1401 transitions, 38747 flow. Second operand 39 states and 321 transitions. [2024-06-27 17:13:43,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 777 places, 1617 transitions, 46423 flow [2024-06-27 17:13:48,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 757 places, 1617 transitions, 45774 flow, removed 239 selfloop flow, removed 20 redundant places. [2024-06-27 17:13:48,435 INFO L231 Difference]: Finished difference. Result has 764 places, 1504 transitions, 44827 flow [2024-06-27 17:13:48,436 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=38180, PETRI_DIFFERENCE_MINUEND_PLACES=719, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1033, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=325, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=44827, PETRI_PLACES=764, PETRI_TRANSITIONS=1504} [2024-06-27 17:13:48,437 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 743 predicate places. [2024-06-27 17:13:48,437 INFO L495 AbstractCegarLoop]: Abstraction has has 764 places, 1504 transitions, 44827 flow [2024-06-27 17:13:48,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.8125) internal successors, (77), 16 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 17:13:48,437 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:13:48,437 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:13:48,448 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2024-06-27 17:13:48,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2024-06-27 17:13:48,640 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:13:48,641 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:13:48,641 INFO L85 PathProgramCache]: Analyzing trace with hash -2021819788, now seen corresponding path program 16 times [2024-06-27 17:13:48,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:13:48,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130086042] [2024-06-27 17:13:48,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:13:48,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:13:48,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:13:48,786 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:13:48,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:13:48,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130086042] [2024-06-27 17:13:48,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130086042] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:13:48,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198150348] [2024-06-27 17:13:48,788 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 17:13:48,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:13:48,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:13:48,789 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:13:48,789 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2024-06-27 17:13:48,917 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 17:13:48,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:13:48,919 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 13 conjunts are in the unsatisfiable core [2024-06-27 17:13:48,920 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:13:48,962 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:13:48,962 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:13:49,060 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:13:49,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198150348] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:13:49,060 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:13:49,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2024-06-27 17:13:49,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215413494] [2024-06-27 17:13:49,061 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:13:49,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-06-27 17:13:49,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:13:49,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-06-27 17:13:49,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2024-06-27 17:13:49,062 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-06-27 17:13:49,062 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 764 places, 1504 transitions, 44827 flow. Second operand has 15 states, 15 states have (on average 4.8) internal successors, (72), 15 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 17:13:49,062 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:13:49,062 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-06-27 17:13:49,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:13:55,429 INFO L124 PetriNetUnfolderBase]: 4727/9369 cut-off events. [2024-06-27 17:13:55,429 INFO L125 PetriNetUnfolderBase]: For 536218/536218 co-relation queries the response was YES. [2024-06-27 17:13:55,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117463 conditions, 9369 events. 4727/9369 cut-off events. For 536218/536218 co-relation queries the response was YES. Maximal size of possible extension queue 729. Compared 80584 event pairs, 133 based on Foata normal form. 36/9405 useless extension candidates. Maximal degree in co-relation 116980. Up to 3500 conditions per place. [2024-06-27 17:13:55,632 INFO L140 encePairwiseOnDemand]: 13/20 looper letters, 740 selfloop transitions, 1088 changer transitions 0/1829 dead transitions. [2024-06-27 17:13:55,632 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 791 places, 1829 transitions, 56999 flow [2024-06-27 17:13:55,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-06-27 17:13:55,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-06-27 17:13:55,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 229 transitions. [2024-06-27 17:13:55,633 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4089285714285714 [2024-06-27 17:13:55,633 INFO L175 Difference]: Start difference. First operand has 764 places, 1504 transitions, 44827 flow. Second operand 28 states and 229 transitions. [2024-06-27 17:13:55,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 791 places, 1829 transitions, 56999 flow [2024-06-27 17:14:02,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 768 places, 1829 transitions, 55441 flow, removed 531 selfloop flow, removed 23 redundant places. [2024-06-27 17:14:02,404 INFO L231 Difference]: Finished difference. Result has 771 places, 1716 transitions, 52969 flow [2024-06-27 17:14:02,406 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=43494, PETRI_DIFFERENCE_MINUEND_PLACES=741, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1500, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=918, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=532, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=52969, PETRI_PLACES=771, PETRI_TRANSITIONS=1716} [2024-06-27 17:14:02,406 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 750 predicate places. [2024-06-27 17:14:02,406 INFO L495 AbstractCegarLoop]: Abstraction has has 771 places, 1716 transitions, 52969 flow [2024-06-27 17:14:02,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.8) internal successors, (72), 15 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 17:14:02,406 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:14:02,406 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:14:02,417 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2024-06-27 17:14:02,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2024-06-27 17:14:02,617 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:14:02,618 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:14:02,618 INFO L85 PathProgramCache]: Analyzing trace with hash 924501036, now seen corresponding path program 17 times [2024-06-27 17:14:02,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:14:02,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690328263] [2024-06-27 17:14:02,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:14:02,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:14:02,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:14:02,724 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:14:02,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:14:02,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690328263] [2024-06-27 17:14:02,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690328263] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:14:02,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611361408] [2024-06-27 17:14:02,725 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-27 17:14:02,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:14:02,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:14:02,726 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:14:02,726 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2024-06-27 17:14:02,882 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-06-27 17:14:02,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:14:02,883 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 13 conjunts are in the unsatisfiable core [2024-06-27 17:14:02,884 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:14:02,928 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:14:02,928 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:14:03,039 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:14:03,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611361408] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:14:03,039 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:14:03,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2024-06-27 17:14:03,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522943082] [2024-06-27 17:14:03,039 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:14:03,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-06-27 17:14:03,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:14:03,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-06-27 17:14:03,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2024-06-27 17:14:03,040 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-06-27 17:14:03,040 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 771 places, 1716 transitions, 52969 flow. Second operand has 16 states, 16 states have (on average 4.6875) internal successors, (75), 16 states have internal predecessors, (75), 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 17:14:03,040 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:14:03,040 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-06-27 17:14:03,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:14:10,587 INFO L124 PetriNetUnfolderBase]: 4725/9323 cut-off events. [2024-06-27 17:14:10,588 INFO L125 PetriNetUnfolderBase]: For 554998/554998 co-relation queries the response was YES. [2024-06-27 17:14:10,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120308 conditions, 9323 events. 4725/9323 cut-off events. For 554998/554998 co-relation queries the response was YES. Maximal size of possible extension queue 717. Compared 79756 event pairs, 394 based on Foata normal form. 16/9339 useless extension candidates. Maximal degree in co-relation 119712. Up to 4267 conditions per place. [2024-06-27 17:14:10,767 INFO L140 encePairwiseOnDemand]: 13/20 looper letters, 742 selfloop transitions, 1052 changer transitions 0/1795 dead transitions. [2024-06-27 17:14:10,767 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 790 places, 1795 transitions, 57774 flow [2024-06-27 17:14:10,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-06-27 17:14:10,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-06-27 17:14:10,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 217 transitions. [2024-06-27 17:14:10,768 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4717391304347826 [2024-06-27 17:14:10,768 INFO L175 Difference]: Start difference. First operand has 771 places, 1716 transitions, 52969 flow. Second operand 23 states and 217 transitions. [2024-06-27 17:14:10,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 790 places, 1795 transitions, 57774 flow [2024-06-27 17:14:18,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 775 places, 1795 transitions, 55966 flow, removed 478 selfloop flow, removed 15 redundant places. [2024-06-27 17:14:18,261 INFO L231 Difference]: Finished difference. Result has 777 places, 1717 transitions, 53776 flow [2024-06-27 17:14:18,262 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=51017, PETRI_DIFFERENCE_MINUEND_PLACES=753, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1710, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1045, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=659, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=53776, PETRI_PLACES=777, PETRI_TRANSITIONS=1717} [2024-06-27 17:14:18,262 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 756 predicate places. [2024-06-27 17:14:18,262 INFO L495 AbstractCegarLoop]: Abstraction has has 777 places, 1717 transitions, 53776 flow [2024-06-27 17:14:18,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.6875) internal successors, (75), 16 states have internal predecessors, (75), 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 17:14:18,263 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:14:18,263 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:14:18,273 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2024-06-27 17:14:18,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:14:18,463 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:14:18,463 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:14:18,463 INFO L85 PathProgramCache]: Analyzing trace with hash -391656268, now seen corresponding path program 18 times [2024-06-27 17:14:18,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:14:18,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288967565] [2024-06-27 17:14:18,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:14:18,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:14:18,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:14:18,573 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:14:18,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:14:18,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288967565] [2024-06-27 17:14:18,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288967565] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:14:18,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89916712] [2024-06-27 17:14:18,574 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-27 17:14:18,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:14:18,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:14:18,579 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:14:18,580 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2024-06-27 17:14:18,715 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-06-27 17:14:18,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:14:18,716 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2024-06-27 17:14:18,717 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:14:18,760 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:14:18,761 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:14:18,906 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:14:18,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89916712] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:14:18,907 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:14:18,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2024-06-27 17:14:18,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679323794] [2024-06-27 17:14:18,907 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:14:18,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-06-27 17:14:18,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:14:18,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-06-27 17:14:18,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2024-06-27 17:14:18,908 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-06-27 17:14:18,908 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 777 places, 1717 transitions, 53776 flow. Second operand has 16 states, 16 states have (on average 4.6875) internal successors, (75), 16 states have internal predecessors, (75), 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 17:14:18,908 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:14:18,908 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-06-27 17:14:18,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:14:26,182 INFO L124 PetriNetUnfolderBase]: 4977/9731 cut-off events. [2024-06-27 17:14:26,182 INFO L125 PetriNetUnfolderBase]: For 581983/581983 co-relation queries the response was YES. [2024-06-27 17:14:26,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 125463 conditions, 9731 events. 4977/9731 cut-off events. For 581983/581983 co-relation queries the response was YES. Maximal size of possible extension queue 737. Compared 82957 event pairs, 89 based on Foata normal form. 12/9743 useless extension candidates. Maximal degree in co-relation 124952. Up to 2557 conditions per place. [2024-06-27 17:14:26,369 INFO L140 encePairwiseOnDemand]: 13/20 looper letters, 499 selfloop transitions, 1430 changer transitions 1/1931 dead transitions. [2024-06-27 17:14:26,370 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 802 places, 1931 transitions, 63173 flow [2024-06-27 17:14:26,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-06-27 17:14:26,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-06-27 17:14:26,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 242 transitions. [2024-06-27 17:14:26,370 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4653846153846154 [2024-06-27 17:14:26,371 INFO L175 Difference]: Start difference. First operand has 777 places, 1717 transitions, 53776 flow. Second operand 26 states and 242 transitions. [2024-06-27 17:14:26,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 802 places, 1931 transitions, 63173 flow [2024-06-27 17:14:33,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 787 places, 1931 transitions, 62189 flow, removed 37 selfloop flow, removed 15 redundant places. [2024-06-27 17:14:33,849 INFO L231 Difference]: Finished difference. Result has 791 places, 1819 transitions, 60058 flow [2024-06-27 17:14:33,850 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=52676, PETRI_DIFFERENCE_MINUEND_PLACES=762, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1713, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1327, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=371, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=60058, PETRI_PLACES=791, PETRI_TRANSITIONS=1819} [2024-06-27 17:14:33,850 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 770 predicate places. [2024-06-27 17:14:33,850 INFO L495 AbstractCegarLoop]: Abstraction has has 791 places, 1819 transitions, 60058 flow [2024-06-27 17:14:33,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.6875) internal successors, (75), 16 states have internal predecessors, (75), 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 17:14:33,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:14:33,851 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:14:33,862 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2024-06-27 17:14:34,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:14:34,062 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:14:34,062 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:14:34,062 INFO L85 PathProgramCache]: Analyzing trace with hash 764024404, now seen corresponding path program 25 times [2024-06-27 17:14:34,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:14:34,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974590476] [2024-06-27 17:14:34,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:14:34,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:14:34,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:14:34,541 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:14:34,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:14:34,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974590476] [2024-06-27 17:14:34,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974590476] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:14:34,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070217586] [2024-06-27 17:14:34,541 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-06-27 17:14:34,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:14:34,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:14:34,543 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:14:34,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2024-06-27 17:14:34,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:14:34,646 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 27 conjunts are in the unsatisfiable core [2024-06-27 17:14:34,647 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:14:34,802 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:14:34,802 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 82 treesize of output 64 [2024-06-27 17:14:34,853 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:14:34,853 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:14:35,119 INFO L349 Elim1Store]: treesize reduction 10, result has 90.5 percent of original size [2024-06-27 17:14:35,119 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 125 [2024-06-27 17:14:35,222 INFO L349 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2024-06-27 17:14:35,223 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2024-06-27 17:14:35,271 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:14:35,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1070217586] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:14:35,271 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:14:35,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 8] total 24 [2024-06-27 17:14:35,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749565999] [2024-06-27 17:14:35,271 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:14:35,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-06-27 17:14:35,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:14:35,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-06-27 17:14:35,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2024-06-27 17:14:35,272 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-06-27 17:14:35,273 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 791 places, 1819 transitions, 60058 flow. Second operand has 25 states, 25 states have (on average 4.84) internal successors, (121), 25 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:14:35,273 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:14:35,273 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-06-27 17:14:35,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:14:42,860 INFO L124 PetriNetUnfolderBase]: 5029/9836 cut-off events. [2024-06-27 17:14:42,860 INFO L125 PetriNetUnfolderBase]: For 619448/619448 co-relation queries the response was YES. [2024-06-27 17:14:43,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133066 conditions, 9836 events. 5029/9836 cut-off events. For 619448/619448 co-relation queries the response was YES. Maximal size of possible extension queue 751. Compared 83917 event pairs, 388 based on Foata normal form. 3/9839 useless extension candidates. Maximal degree in co-relation 132575. Up to 8437 conditions per place. [2024-06-27 17:14:43,073 INFO L140 encePairwiseOnDemand]: 10/20 looper letters, 1664 selfloop transitions, 351 changer transitions 7/2023 dead transitions. [2024-06-27 17:14:43,074 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 823 places, 2023 transitions, 68223 flow [2024-06-27 17:14:43,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-06-27 17:14:43,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2024-06-27 17:14:43,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 271 transitions. [2024-06-27 17:14:43,075 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4106060606060606 [2024-06-27 17:14:43,075 INFO L175 Difference]: Start difference. First operand has 791 places, 1819 transitions, 60058 flow. Second operand 33 states and 271 transitions. [2024-06-27 17:14:43,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 823 places, 2023 transitions, 68223 flow [2024-06-27 17:14:51,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 812 places, 2023 transitions, 67139 flow, removed 293 selfloop flow, removed 11 redundant places. [2024-06-27 17:14:51,756 INFO L231 Difference]: Finished difference. Result has 823 places, 1855 transitions, 61270 flow [2024-06-27 17:14:51,757 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=59044, PETRI_DIFFERENCE_MINUEND_PLACES=780, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1819, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=316, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1470, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=61270, PETRI_PLACES=823, PETRI_TRANSITIONS=1855} [2024-06-27 17:14:51,757 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 802 predicate places. [2024-06-27 17:14:51,758 INFO L495 AbstractCegarLoop]: Abstraction has has 823 places, 1855 transitions, 61270 flow [2024-06-27 17:14:51,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.84) internal successors, (121), 25 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:14:51,758 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:14:51,758 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:14:51,771 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2024-06-27 17:14:51,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2024-06-27 17:14:51,970 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:14:51,970 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:14:51,970 INFO L85 PathProgramCache]: Analyzing trace with hash 1623493580, now seen corresponding path program 26 times [2024-06-27 17:14:51,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:14:51,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16738618] [2024-06-27 17:14:51,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:14:51,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:14:51,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:14:52,428 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:14:52,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:14:52,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16738618] [2024-06-27 17:14:52,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16738618] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:14:52,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433191328] [2024-06-27 17:14:52,429 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 17:14:52,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:14:52,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:14:52,430 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:14:52,430 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2024-06-27 17:14:52,532 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 17:14:52,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:14:52,533 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 33 conjunts are in the unsatisfiable core [2024-06-27 17:14:52,534 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:14:52,719 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:14:52,719 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 93 treesize of output 71 [2024-06-27 17:14:52,809 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 17:14:52,810 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:14:53,029 INFO L349 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2024-06-27 17:14:53,029 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2024-06-27 17:14:53,077 INFO L349 Elim1Store]: treesize reduction 74, result has 29.5 percent of original size [2024-06-27 17:14:53,078 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 61 [2024-06-27 17:14:53,109 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:14:53,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433191328] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:14:53,109 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:14:53,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 8] total 26 [2024-06-27 17:14:53,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054244403] [2024-06-27 17:14:53,109 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:14:53,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-06-27 17:14:53,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:14:53,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-06-27 17:14:53,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=590, Unknown=0, NotChecked=0, Total=702 [2024-06-27 17:14:53,111 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-06-27 17:14:53,111 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 823 places, 1855 transitions, 61270 flow. Second operand has 27 states, 27 states have (on average 4.7407407407407405) internal successors, (128), 27 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:14:53,111 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:14:53,111 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-06-27 17:14:53,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:15:00,947 INFO L124 PetriNetUnfolderBase]: 5033/9872 cut-off events. [2024-06-27 17:15:00,947 INFO L125 PetriNetUnfolderBase]: For 634226/634226 co-relation queries the response was YES. [2024-06-27 17:15:01,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 134042 conditions, 9872 events. 5033/9872 cut-off events. For 634226/634226 co-relation queries the response was YES. Maximal size of possible extension queue 756. Compared 84571 event pairs, 403 based on Foata normal form. 5/9877 useless extension candidates. Maximal degree in co-relation 133434. Up to 8530 conditions per place. [2024-06-27 17:15:01,151 INFO L140 encePairwiseOnDemand]: 9/20 looper letters, 1752 selfloop transitions, 285 changer transitions 11/2049 dead transitions. [2024-06-27 17:15:01,151 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 856 places, 2049 transitions, 68589 flow [2024-06-27 17:15:01,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-06-27 17:15:01,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2024-06-27 17:15:01,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 296 transitions. [2024-06-27 17:15:01,152 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4228571428571429 [2024-06-27 17:15:01,152 INFO L175 Difference]: Start difference. First operand has 823 places, 1855 transitions, 61270 flow. Second operand 35 states and 296 transitions. [2024-06-27 17:15:01,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 856 places, 2049 transitions, 68589 flow [2024-06-27 17:15:09,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 836 places, 2049 transitions, 67505 flow, removed 268 selfloop flow, removed 20 redundant places. [2024-06-27 17:15:09,924 INFO L231 Difference]: Finished difference. Result has 841 places, 1861 transitions, 60939 flow [2024-06-27 17:15:09,925 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=60200, PETRI_DIFFERENCE_MINUEND_PLACES=802, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1855, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=279, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1571, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=60939, PETRI_PLACES=841, PETRI_TRANSITIONS=1861} [2024-06-27 17:15:09,925 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 820 predicate places. [2024-06-27 17:15:09,926 INFO L495 AbstractCegarLoop]: Abstraction has has 841 places, 1861 transitions, 60939 flow [2024-06-27 17:15:09,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.7407407407407405) internal successors, (128), 27 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:15:09,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:15:09,926 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:15:09,937 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2024-06-27 17:15:10,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:15:10,137 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:15:10,137 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:15:10,137 INFO L85 PathProgramCache]: Analyzing trace with hash 1544845340, now seen corresponding path program 27 times [2024-06-27 17:15:10,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:15:10,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786235741] [2024-06-27 17:15:10,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:15:10,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:15:10,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:15:10,613 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:15:10,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:15:10,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786235741] [2024-06-27 17:15:10,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786235741] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:15:10,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77639927] [2024-06-27 17:15:10,613 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 17:15:10,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:15:10,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:15:10,614 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:15:10,632 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2024-06-27 17:15:10,699 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-06-27 17:15:10,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:15:10,700 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 33 conjunts are in the unsatisfiable core [2024-06-27 17:15:10,701 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:15:10,924 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:15:10,925 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 20 [2024-06-27 17:15:10,928 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 17:15:10,928 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:15:11,167 INFO L349 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2024-06-27 17:15:11,167 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2024-06-27 17:15:11,213 INFO L349 Elim1Store]: treesize reduction 74, result has 29.5 percent of original size [2024-06-27 17:15:11,214 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 61 [2024-06-27 17:15:11,250 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:15:11,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77639927] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:15:11,251 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:15:11,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 8] total 27 [2024-06-27 17:15:11,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569574870] [2024-06-27 17:15:11,251 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:15:11,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-06-27 17:15:11,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:15:11,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-06-27 17:15:11,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=661, Unknown=0, NotChecked=0, Total=756 [2024-06-27 17:15:11,252 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-06-27 17:15:11,252 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 841 places, 1861 transitions, 60939 flow. Second operand has 28 states, 28 states have (on average 4.75) internal successors, (133), 28 states have internal predecessors, (133), 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 17:15:11,252 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:15:11,252 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-06-27 17:15:11,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:15:19,546 INFO L124 PetriNetUnfolderBase]: 5028/9837 cut-off events. [2024-06-27 17:15:19,546 INFO L125 PetriNetUnfolderBase]: For 642560/642560 co-relation queries the response was YES. [2024-06-27 17:15:19,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133615 conditions, 9837 events. 5028/9837 cut-off events. For 642560/642560 co-relation queries the response was YES. Maximal size of possible extension queue 754. Compared 83943 event pairs, 421 based on Foata normal form. 5/9842 useless extension candidates. Maximal degree in co-relation 133097. Up to 9179 conditions per place. [2024-06-27 17:15:19,753 INFO L140 encePairwiseOnDemand]: 9/20 looper letters, 1734 selfloop transitions, 196 changer transitions 12/1943 dead transitions. [2024-06-27 17:15:19,753 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 879 places, 1943 transitions, 65456 flow [2024-06-27 17:15:19,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-06-27 17:15:19,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2024-06-27 17:15:19,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 336 transitions. [2024-06-27 17:15:19,754 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4097560975609756 [2024-06-27 17:15:19,754 INFO L175 Difference]: Start difference. First operand has 841 places, 1861 transitions, 60939 flow. Second operand 41 states and 336 transitions. [2024-06-27 17:15:19,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 879 places, 1943 transitions, 65456 flow [2024-06-27 17:15:28,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 851 places, 1943 transitions, 64792 flow, removed 82 selfloop flow, removed 28 redundant places. [2024-06-27 17:15:28,921 INFO L231 Difference]: Finished difference. Result has 857 places, 1859 transitions, 60622 flow [2024-06-27 17:15:28,922 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=60282, PETRI_DIFFERENCE_MINUEND_PLACES=811, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1861, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=194, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1665, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=60622, PETRI_PLACES=857, PETRI_TRANSITIONS=1859} [2024-06-27 17:15:28,923 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 836 predicate places. [2024-06-27 17:15:28,923 INFO L495 AbstractCegarLoop]: Abstraction has has 857 places, 1859 transitions, 60622 flow [2024-06-27 17:15:28,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 4.75) internal successors, (133), 28 states have internal predecessors, (133), 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 17:15:28,923 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:15:28,923 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 17:15:28,934 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2024-06-27 17:15:29,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2024-06-27 17:15:29,124 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:15:29,124 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:15:29,124 INFO L85 PathProgramCache]: Analyzing trace with hash 1173095952, now seen corresponding path program 28 times [2024-06-27 17:15:29,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:15:29,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420853698] [2024-06-27 17:15:29,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:15:29,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:15:29,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:15:29,237 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:15:29,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:15:29,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420853698] [2024-06-27 17:15:29,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420853698] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:15:29,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707080713] [2024-06-27 17:15:29,238 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 17:15:29,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:15:29,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:15:29,239 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:15:29,239 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2024-06-27 17:15:29,349 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 17:15:29,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:15:29,351 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 54 conjunts are in the unsatisfiable core [2024-06-27 17:15:29,354 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:15:29,395 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-06-27 17:15:29,797 INFO L349 Elim1Store]: treesize reduction 63, result has 22.2 percent of original size [2024-06-27 17:15:29,797 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 198 treesize of output 103 [2024-06-27 17:15:29,838 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:15:29,838 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:15:30,945 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 336 treesize of output 296 [2024-06-27 17:15:31,263 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:15:31,263 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 15 new quantified variables, introduced 36 case distinctions, treesize of input 2357 treesize of output 1391 [2024-06-27 17:16:07,214 WARN L672 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2024-06-27 17:16:28,066 WARN L672 sPolynomialRelations]: Constructing 256(two to the power of 8 dual juncts.