./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/chl-array-int-subst.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/chl-array-int-subst.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 779f57e464f50d458e1b66270e0c9f2866c6247d4d7f63a3096c6ac13e286657 --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 16:29:33,259 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 16:29:33,315 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 16:29:33,318 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 16:29:33,318 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 16:29:33,332 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 16:29:33,333 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 16:29:33,333 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 16:29:33,333 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 16:29:33,334 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 16:29:33,334 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 16:29:33,334 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 16:29:33,335 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 16:29:33,335 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 16:29:33,335 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 16:29:33,335 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 16:29:33,335 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 16:29:33,336 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 16:29:33,336 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 16:29:33,336 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 16:29:33,336 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 16:29:33,337 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 16:29:33,337 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 16:29:33,337 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 16:29:33,337 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 16:29:33,338 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 16:29:33,338 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 16:29:33,338 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 16:29:33,338 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 16:29:33,338 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 16:29:33,339 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 16:29:33,339 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 16:29:33,339 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 16:29:33,339 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 16:29:33,339 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 16:29:33,340 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 16:29:33,340 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 16:29:33,340 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 16:29:33,340 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 16:29:33,340 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 16:29:33,341 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 16:29:33,341 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 16:29:33,341 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 16:29:33,341 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 779f57e464f50d458e1b66270e0c9f2866c6247d4d7f63a3096c6ac13e286657 [2024-06-27 16:29:33,520 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 16:29:33,542 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 16:29:33,544 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 16:29:33,545 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 16:29:33,546 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 16:29:33,547 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-array-int-subst.wvr.c [2024-06-27 16:29:34,486 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 16:29:34,661 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 16:29:34,662 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-array-int-subst.wvr.c [2024-06-27 16:29:34,672 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5580be394/c5cec2d0efe0430a83be414651aee254/FLAGd6a8afb1c [2024-06-27 16:29:34,685 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5580be394/c5cec2d0efe0430a83be414651aee254 [2024-06-27 16:29:34,687 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 16:29:34,688 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-06-27 16:29:34,689 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 16:29:34,689 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 16:29:34,692 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 16:29:34,695 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 04:29:34" (1/1) ... [2024-06-27 16:29:34,695 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f147b07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:29:34, skipping insertion in model container [2024-06-27 16:29:34,696 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 04:29:34" (1/1) ... [2024-06-27 16:29:34,715 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 16:29:34,844 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/chl-array-int-subst.wvr.c[2820,2833] [2024-06-27 16:29:34,863 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 16:29:34,869 INFO L202 MainTranslator]: Completed pre-run [2024-06-27 16:29:34,886 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/chl-array-int-subst.wvr.c[2820,2833] [2024-06-27 16:29:34,889 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 16:29:34,902 INFO L206 MainTranslator]: Completed translation [2024-06-27 16:29:34,903 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:29:34 WrapperNode [2024-06-27 16:29:34,903 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 16:29:34,904 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 16:29:34,904 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 16:29:34,904 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 16:29:34,909 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:29:34" (1/1) ... [2024-06-27 16:29:34,920 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:29:34" (1/1) ... [2024-06-27 16:29:34,942 INFO L138 Inliner]: procedures = 25, calls = 35, calls flagged for inlining = 14, calls inlined = 22, statements flattened = 274 [2024-06-27 16:29:34,942 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 16:29:34,944 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 16:29:34,947 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 16:29:34,947 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 16:29:34,956 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:29:34" (1/1) ... [2024-06-27 16:29:34,956 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:29:34" (1/1) ... [2024-06-27 16:29:34,959 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:29:34" (1/1) ... [2024-06-27 16:29:34,978 INFO L175 MemorySlicer]: Split 17 memory accesses to 2 slices as follows [2, 15]. 88 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 3 writes are split as follows [0, 3]. [2024-06-27 16:29:34,978 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:29:34" (1/1) ... [2024-06-27 16:29:34,978 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:29:34" (1/1) ... [2024-06-27 16:29:34,984 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:29:34" (1/1) ... [2024-06-27 16:29:35,001 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:29:34" (1/1) ... [2024-06-27 16:29:35,017 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:29:34" (1/1) ... [2024-06-27 16:29:35,019 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:29:34" (1/1) ... [2024-06-27 16:29:35,021 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 16:29:35,022 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 16:29:35,022 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 16:29:35,022 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 16:29:35,023 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:29:34" (1/1) ... [2024-06-27 16:29:35,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 16:29:35,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:29:35,060 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-27 16:29:35,064 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-27 16:29:35,105 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 16:29:35,106 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-06-27 16:29:35,106 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-06-27 16:29:35,106 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-06-27 16:29:35,106 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-06-27 16:29:35,106 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-06-27 16:29:35,107 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-06-27 16:29:35,108 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 16:29:35,108 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-27 16:29:35,108 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-27 16:29:35,108 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-27 16:29:35,108 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-06-27 16:29:35,109 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 16:29:35,109 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 16:29:35,109 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-27 16:29:35,109 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-27 16:29:35,111 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-27 16:29:35,230 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 16:29:35,233 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 16:29:35,587 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 16:29:35,587 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 16:29:35,845 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 16:29:35,846 INFO L320 CfgBuilder]: Removed 6 assume(true) statements. [2024-06-27 16:29:35,846 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 04:29:35 BoogieIcfgContainer [2024-06-27 16:29:35,847 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 16:29:35,848 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 16:29:35,849 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 16:29:35,851 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 16:29:35,852 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 04:29:34" (1/3) ... [2024-06-27 16:29:35,852 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2825fb94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 04:29:35, skipping insertion in model container [2024-06-27 16:29:35,853 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:29:34" (2/3) ... [2024-06-27 16:29:35,853 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2825fb94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 04:29:35, skipping insertion in model container [2024-06-27 16:29:35,853 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 04:29:35" (3/3) ... [2024-06-27 16:29:35,855 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-array-int-subst.wvr.c [2024-06-27 16:29:35,861 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2024-06-27 16:29:35,867 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 16:29:35,868 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-06-27 16:29:35,868 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 16:29:35,925 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-06-27 16:29:35,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 41 places, 40 transitions, 101 flow [2024-06-27 16:29:35,987 INFO L124 PetriNetUnfolderBase]: 9/37 cut-off events. [2024-06-27 16:29:35,988 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-06-27 16:29:35,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50 conditions, 37 events. 9/37 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 33 event pairs, 0 based on Foata normal form. 0/27 useless extension candidates. Maximal degree in co-relation 27. Up to 2 conditions per place. [2024-06-27 16:29:35,992 INFO L82 GeneralOperation]: Start removeDead. Operand has 41 places, 40 transitions, 101 flow [2024-06-27 16:29:35,995 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 37 places, 36 transitions, 90 flow [2024-06-27 16:29:36,009 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 16:29:36,014 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;@6b050a0c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 16:29:36,014 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-06-27 16:29:36,022 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 16:29:36,022 INFO L124 PetriNetUnfolderBase]: 9/35 cut-off events. [2024-06-27 16:29:36,022 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-06-27 16:29:36,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:29:36,023 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:29:36,024 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:29:36,027 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:29:36,027 INFO L85 PathProgramCache]: Analyzing trace with hash 1313884014, now seen corresponding path program 1 times [2024-06-27 16:29:36,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:29:36,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845599142] [2024-06-27 16:29:36,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:29:36,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:29:36,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:29:36,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:29:36,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:29:36,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845599142] [2024-06-27 16:29:36,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845599142] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:29:36,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:29:36,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 16:29:36,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419111622] [2024-06-27 16:29:36,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:29:36,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 16:29:36,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:29:36,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 16:29:36,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2024-06-27 16:29:36,843 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 40 [2024-06-27 16:29:36,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 36 transitions, 90 flow. Second operand has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 9 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 16:29:36,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:29:36,845 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 40 [2024-06-27 16:29:36,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:29:37,456 INFO L124 PetriNetUnfolderBase]: 2833/3857 cut-off events. [2024-06-27 16:29:37,457 INFO L125 PetriNetUnfolderBase]: For 314/314 co-relation queries the response was YES. [2024-06-27 16:29:37,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7959 conditions, 3857 events. 2833/3857 cut-off events. For 314/314 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 15264 event pairs, 264 based on Foata normal form. 1/2780 useless extension candidates. Maximal degree in co-relation 4518. Up to 1286 conditions per place. [2024-06-27 16:29:37,473 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 131 selfloop transitions, 18 changer transitions 1/151 dead transitions. [2024-06-27 16:29:37,473 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 151 transitions, 680 flow [2024-06-27 16:29:37,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 16:29:37,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 16:29:37,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 195 transitions. [2024-06-27 16:29:37,483 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4431818181818182 [2024-06-27 16:29:37,484 INFO L175 Difference]: Start difference. First operand has 37 places, 36 transitions, 90 flow. Second operand 11 states and 195 transitions. [2024-06-27 16:29:37,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 151 transitions, 680 flow [2024-06-27 16:29:37,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 151 transitions, 628 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-27 16:29:37,492 INFO L231 Difference]: Finished difference. Result has 45 places, 54 transitions, 186 flow [2024-06-27 16:29:37,493 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=186, PETRI_PLACES=45, PETRI_TRANSITIONS=54} [2024-06-27 16:29:37,495 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 8 predicate places. [2024-06-27 16:29:37,495 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 54 transitions, 186 flow [2024-06-27 16:29:37,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 9 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 16:29:37,496 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:29:37,496 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:29:37,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 16:29:37,496 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:29:37,497 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:29:37,497 INFO L85 PathProgramCache]: Analyzing trace with hash 1734295646, now seen corresponding path program 2 times [2024-06-27 16:29:37,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:29:37,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073752405] [2024-06-27 16:29:37,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:29:37,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:29:37,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:29:37,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:29:37,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:29:37,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073752405] [2024-06-27 16:29:37,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073752405] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:29:37,831 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:29:37,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 16:29:37,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27508944] [2024-06-27 16:29:37,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:29:37,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 16:29:37,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:29:37,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 16:29:37,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2024-06-27 16:29:37,833 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 40 [2024-06-27 16:29:37,834 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 54 transitions, 186 flow. Second operand has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 9 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 16:29:37,834 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:29:37,834 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 40 [2024-06-27 16:29:37,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:29:38,273 INFO L124 PetriNetUnfolderBase]: 3203/4412 cut-off events. [2024-06-27 16:29:38,274 INFO L125 PetriNetUnfolderBase]: For 609/609 co-relation queries the response was YES. [2024-06-27 16:29:38,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9721 conditions, 4412 events. 3203/4412 cut-off events. For 609/609 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 18390 event pairs, 1123 based on Foata normal form. 1/3603 useless extension candidates. Maximal degree in co-relation 9452. Up to 1844 conditions per place. [2024-06-27 16:29:38,290 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 107 selfloop transitions, 16 changer transitions 1/125 dead transitions. [2024-06-27 16:29:38,291 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 125 transitions, 603 flow [2024-06-27 16:29:38,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 16:29:38,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 16:29:38,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-27 16:29:38,295 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4305555555555556 [2024-06-27 16:29:38,295 INFO L175 Difference]: Start difference. First operand has 45 places, 54 transitions, 186 flow. Second operand 9 states and 155 transitions. [2024-06-27 16:29:38,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 125 transitions, 603 flow [2024-06-27 16:29:38,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 125 transitions, 597 flow, removed 3 selfloop flow, removed 0 redundant places. [2024-06-27 16:29:38,301 INFO L231 Difference]: Finished difference. Result has 54 places, 57 transitions, 235 flow [2024-06-27 16:29:38,301 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=235, PETRI_PLACES=54, PETRI_TRANSITIONS=57} [2024-06-27 16:29:38,302 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 17 predicate places. [2024-06-27 16:29:38,302 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 57 transitions, 235 flow [2024-06-27 16:29:38,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 9 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 16:29:38,303 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:29:38,303 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:29:38,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 16:29:38,304 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:29:38,304 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:29:38,304 INFO L85 PathProgramCache]: Analyzing trace with hash 1863214200, now seen corresponding path program 1 times [2024-06-27 16:29:38,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:29:38,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490180605] [2024-06-27 16:29:38,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:29:38,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:29:38,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:29:38,419 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:29:38,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:29:38,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490180605] [2024-06-27 16:29:38,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490180605] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:29:38,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825184031] [2024-06-27 16:29:38,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:29:38,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:29:38,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:29:38,426 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:29:38,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-06-27 16:29:38,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:29:38,523 INFO L262 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 10 conjunts are in the unsatisfiable core [2024-06-27 16:29:38,528 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:29:38,632 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:29:38,632 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:29:38,699 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:29:38,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825184031] provided 1 perfect and 1 imperfect interpolant sequences [2024-06-27 16:29:38,699 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-06-27 16:29:38,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 11 [2024-06-27 16:29:38,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094511651] [2024-06-27 16:29:38,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:29:38,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 16:29:38,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:29:38,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 16:29:38,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-06-27 16:29:38,701 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 40 [2024-06-27 16:29:38,701 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 57 transitions, 235 flow. Second operand has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:29:38,701 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:29:38,701 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 40 [2024-06-27 16:29:38,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:29:39,154 INFO L124 PetriNetUnfolderBase]: 4519/6228 cut-off events. [2024-06-27 16:29:39,155 INFO L125 PetriNetUnfolderBase]: For 1771/1771 co-relation queries the response was YES. [2024-06-27 16:29:39,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14495 conditions, 6228 events. 4519/6228 cut-off events. For 1771/1771 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 27718 event pairs, 2393 based on Foata normal form. 1/5119 useless extension candidates. Maximal degree in co-relation 14190. Up to 2983 conditions per place. [2024-06-27 16:29:39,176 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 124 selfloop transitions, 8 changer transitions 5/138 dead transitions. [2024-06-27 16:29:39,176 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 138 transitions, 740 flow [2024-06-27 16:29:39,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 16:29:39,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 16:29:39,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-27 16:29:39,177 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6125 [2024-06-27 16:29:39,178 INFO L175 Difference]: Start difference. First operand has 54 places, 57 transitions, 235 flow. Second operand 6 states and 147 transitions. [2024-06-27 16:29:39,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 138 transitions, 740 flow [2024-06-27 16:29:39,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 138 transitions, 720 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-27 16:29:39,186 INFO L231 Difference]: Finished difference. Result has 57 places, 59 transitions, 250 flow [2024-06-27 16:29:39,187 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=219, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=250, PETRI_PLACES=57, PETRI_TRANSITIONS=59} [2024-06-27 16:29:39,187 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 20 predicate places. [2024-06-27 16:29:39,187 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 59 transitions, 250 flow [2024-06-27 16:29:39,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:29:39,188 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:29:39,188 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:29:39,199 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-06-27 16:29:39,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:29:39,402 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:29:39,402 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:29:39,402 INFO L85 PathProgramCache]: Analyzing trace with hash -1029468692, now seen corresponding path program 1 times [2024-06-27 16:29:39,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:29:39,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007353499] [2024-06-27 16:29:39,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:29:39,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:29:39,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:29:39,631 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:29:39,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:29:39,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007353499] [2024-06-27 16:29:39,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007353499] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:29:39,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103344740] [2024-06-27 16:29:39,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:29:39,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:29:39,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:29:39,634 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:29:39,664 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-06-27 16:29:39,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:29:39,723 INFO L262 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 15 conjunts are in the unsatisfiable core [2024-06-27 16:29:39,725 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:29:39,852 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:29:39,852 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:29:40,041 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:29:40,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103344740] provided 1 perfect and 1 imperfect interpolant sequences [2024-06-27 16:29:40,042 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-06-27 16:29:40,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7] total 16 [2024-06-27 16:29:40,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178280139] [2024-06-27 16:29:40,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:29:40,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 16:29:40,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:29:40,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 16:29:40,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2024-06-27 16:29:40,044 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 40 [2024-06-27 16:29:40,045 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 59 transitions, 250 flow. Second operand has 8 states, 8 states have (on average 7.0) internal successors, (56), 8 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 16:29:40,045 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:29:40,045 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 40 [2024-06-27 16:29:40,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:29:40,850 INFO L124 PetriNetUnfolderBase]: 6283/8623 cut-off events. [2024-06-27 16:29:40,850 INFO L125 PetriNetUnfolderBase]: For 2838/2838 co-relation queries the response was YES. [2024-06-27 16:29:40,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20681 conditions, 8623 events. 6283/8623 cut-off events. For 2838/2838 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 40551 event pairs, 929 based on Foata normal form. 1/7445 useless extension candidates. Maximal degree in co-relation 17508. Up to 2987 conditions per place. [2024-06-27 16:29:40,884 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 165 selfloop transitions, 20 changer transitions 1/187 dead transitions. [2024-06-27 16:29:40,885 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 187 transitions, 987 flow [2024-06-27 16:29:40,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 16:29:40,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 16:29:40,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 220 transitions. [2024-06-27 16:29:40,886 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-27 16:29:40,886 INFO L175 Difference]: Start difference. First operand has 57 places, 59 transitions, 250 flow. Second operand 11 states and 220 transitions. [2024-06-27 16:29:40,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 187 transitions, 987 flow [2024-06-27 16:29:40,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 187 transitions, 976 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 16:29:40,895 INFO L231 Difference]: Finished difference. Result has 67 places, 66 transitions, 335 flow [2024-06-27 16:29:40,896 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=239, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=335, PETRI_PLACES=67, PETRI_TRANSITIONS=66} [2024-06-27 16:29:40,896 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 30 predicate places. [2024-06-27 16:29:40,896 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 66 transitions, 335 flow [2024-06-27 16:29:40,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 8 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 16:29:40,897 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:29:40,897 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:29:40,912 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-06-27 16:29:41,112 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,SelfDestructingSolverStorable3 [2024-06-27 16:29:41,113 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:29:41,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:29:41,113 INFO L85 PathProgramCache]: Analyzing trace with hash 875880000, now seen corresponding path program 1 times [2024-06-27 16:29:41,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:29:41,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428764032] [2024-06-27 16:29:41,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:29:41,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:29:41,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:29:41,206 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:29:41,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:29:41,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428764032] [2024-06-27 16:29:41,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428764032] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:29:41,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882691073] [2024-06-27 16:29:41,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:29:41,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:29:41,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:29:41,208 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:29:41,255 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-06-27 16:29:41,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:29:41,317 INFO L262 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 10 conjunts are in the unsatisfiable core [2024-06-27 16:29:41,318 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:29:41,371 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:29:41,372 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:29:41,426 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:29:41,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882691073] provided 1 perfect and 1 imperfect interpolant sequences [2024-06-27 16:29:41,427 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-06-27 16:29:41,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 13 [2024-06-27 16:29:41,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47484031] [2024-06-27 16:29:41,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:29:41,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 16:29:41,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:29:41,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 16:29:41,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2024-06-27 16:29:41,428 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 40 [2024-06-27 16:29:41,429 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 66 transitions, 335 flow. Second operand has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:29:41,429 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:29:41,429 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 40 [2024-06-27 16:29:41,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:29:42,287 INFO L124 PetriNetUnfolderBase]: 7600/10441 cut-off events. [2024-06-27 16:29:42,287 INFO L125 PetriNetUnfolderBase]: For 6913/6913 co-relation queries the response was YES. [2024-06-27 16:29:42,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26593 conditions, 10441 events. 7600/10441 cut-off events. For 6913/6913 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 50473 event pairs, 4358 based on Foata normal form. 1/9023 useless extension candidates. Maximal degree in co-relation 23250. Up to 7293 conditions per place. [2024-06-27 16:29:42,320 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 141 selfloop transitions, 8 changer transitions 5/155 dead transitions. [2024-06-27 16:29:42,320 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 155 transitions, 952 flow [2024-06-27 16:29:42,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 16:29:42,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 16:29:42,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 151 transitions. [2024-06-27 16:29:42,321 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5392857142857143 [2024-06-27 16:29:42,321 INFO L175 Difference]: Start difference. First operand has 67 places, 66 transitions, 335 flow. Second operand 7 states and 151 transitions. [2024-06-27 16:29:42,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 155 transitions, 952 flow [2024-06-27 16:29:42,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 155 transitions, 913 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-27 16:29:42,346 INFO L231 Difference]: Finished difference. Result has 72 places, 70 transitions, 356 flow [2024-06-27 16:29:42,346 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=306, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=356, PETRI_PLACES=72, PETRI_TRANSITIONS=70} [2024-06-27 16:29:42,347 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 35 predicate places. [2024-06-27 16:29:42,348 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 70 transitions, 356 flow [2024-06-27 16:29:42,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:29:42,348 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:29:42,348 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:29:42,371 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-06-27 16:29:42,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:29:42,560 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:29:42,560 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:29:42,561 INFO L85 PathProgramCache]: Analyzing trace with hash 862633564, now seen corresponding path program 1 times [2024-06-27 16:29:42,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:29:42,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422934145] [2024-06-27 16:29:42,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:29:42,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:29:42,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:29:42,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:29:42,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:29:42,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422934145] [2024-06-27 16:29:42,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422934145] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:29:42,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:29:42,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 16:29:42,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049834281] [2024-06-27 16:29:42,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:29:42,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 16:29:42,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:29:42,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 16:29:42,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-27 16:29:42,623 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 40 [2024-06-27 16:29:42,623 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 70 transitions, 356 flow. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:29:42,623 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:29:42,623 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 40 [2024-06-27 16:29:42,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:29:43,231 INFO L124 PetriNetUnfolderBase]: 5369/7551 cut-off events. [2024-06-27 16:29:43,232 INFO L125 PetriNetUnfolderBase]: For 5385/5385 co-relation queries the response was YES. [2024-06-27 16:29:43,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19352 conditions, 7551 events. 5369/7551 cut-off events. For 5385/5385 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 36426 event pairs, 2062 based on Foata normal form. 0/6686 useless extension candidates. Maximal degree in co-relation 17336. Up to 3677 conditions per place. [2024-06-27 16:29:43,268 INFO L140 encePairwiseOnDemand]: 35/40 looper letters, 100 selfloop transitions, 10 changer transitions 0/111 dead transitions. [2024-06-27 16:29:43,268 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 111 transitions, 704 flow [2024-06-27 16:29:43,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 16:29:43,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 16:29:43,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 103 transitions. [2024-06-27 16:29:43,269 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.515 [2024-06-27 16:29:43,269 INFO L175 Difference]: Start difference. First operand has 72 places, 70 transitions, 356 flow. Second operand 5 states and 103 transitions. [2024-06-27 16:29:43,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 111 transitions, 704 flow [2024-06-27 16:29:43,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 111 transitions, 676 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-27 16:29:43,288 INFO L231 Difference]: Finished difference. Result has 73 places, 65 transitions, 333 flow [2024-06-27 16:29:43,288 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=288, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=333, PETRI_PLACES=73, PETRI_TRANSITIONS=65} [2024-06-27 16:29:43,288 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 36 predicate places. [2024-06-27 16:29:43,289 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 65 transitions, 333 flow [2024-06-27 16:29:43,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:29:43,289 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:29:43,289 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:29:43,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 16:29:43,289 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:29:43,290 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:29:43,290 INFO L85 PathProgramCache]: Analyzing trace with hash 1923356212, now seen corresponding path program 2 times [2024-06-27 16:29:43,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:29:43,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457549398] [2024-06-27 16:29:43,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:29:43,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:29:43,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:29:43,509 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:29:43,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:29:43,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457549398] [2024-06-27 16:29:43,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457549398] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:29:43,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754585447] [2024-06-27 16:29:43,510 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 16:29:43,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:29:43,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:29:43,512 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:29:43,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-06-27 16:29:43,593 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-06-27 16:29:43,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:29:43,595 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 15 conjunts are in the unsatisfiable core [2024-06-27 16:29:43,596 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:29:43,729 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:29:43,729 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-27 16:29:43,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754585447] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:29:43,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-06-27 16:29:43,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 13 [2024-06-27 16:29:43,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612956462] [2024-06-27 16:29:43,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:29:43,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 16:29:43,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:29:43,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 16:29:43,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2024-06-27 16:29:43,731 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 40 [2024-06-27 16:29:43,731 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 65 transitions, 333 flow. Second operand has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:29:43,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:29:43,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 40 [2024-06-27 16:29:43,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:29:44,566 INFO L124 PetriNetUnfolderBase]: 8480/11950 cut-off events. [2024-06-27 16:29:44,566 INFO L125 PetriNetUnfolderBase]: For 9525/9525 co-relation queries the response was YES. [2024-06-27 16:29:44,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30273 conditions, 11950 events. 8480/11950 cut-off events. For 9525/9525 co-relation queries the response was YES. Maximal size of possible extension queue 587. Compared 64161 event pairs, 1600 based on Foata normal form. 1/10542 useless extension candidates. Maximal degree in co-relation 27120. Up to 3740 conditions per place. [2024-06-27 16:29:44,603 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 154 selfloop transitions, 48 changer transitions 2/205 dead transitions. [2024-06-27 16:29:44,603 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 205 transitions, 1316 flow [2024-06-27 16:29:44,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 16:29:44,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 16:29:44,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 187 transitions. [2024-06-27 16:29:44,605 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4675 [2024-06-27 16:29:44,605 INFO L175 Difference]: Start difference. First operand has 73 places, 65 transitions, 333 flow. Second operand 10 states and 187 transitions. [2024-06-27 16:29:44,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 205 transitions, 1316 flow [2024-06-27 16:29:44,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 205 transitions, 1291 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-27 16:29:44,622 INFO L231 Difference]: Finished difference. Result has 85 places, 103 transitions, 775 flow [2024-06-27 16:29:44,622 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=322, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=775, PETRI_PLACES=85, PETRI_TRANSITIONS=103} [2024-06-27 16:29:44,623 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 48 predicate places. [2024-06-27 16:29:44,623 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 103 transitions, 775 flow [2024-06-27 16:29:44,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:29:44,623 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:29:44,623 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:29:44,637 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-06-27 16:29:44,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:29:44,838 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:29:44,838 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:29:44,838 INFO L85 PathProgramCache]: Analyzing trace with hash 719547290, now seen corresponding path program 3 times [2024-06-27 16:29:44,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:29:44,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095341821] [2024-06-27 16:29:44,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:29:44,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:29:44,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:29:45,054 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:29:45,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:29:45,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095341821] [2024-06-27 16:29:45,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095341821] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:29:45,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612579580] [2024-06-27 16:29:45,055 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 16:29:45,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:29:45,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:29:45,056 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:29:45,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-06-27 16:29:45,140 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-06-27 16:29:45,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:29:45,142 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 15 conjunts are in the unsatisfiable core [2024-06-27 16:29:45,143 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:29:45,256 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:29:45,256 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-27 16:29:45,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [612579580] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:29:45,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-06-27 16:29:45,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 13 [2024-06-27 16:29:45,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864863757] [2024-06-27 16:29:45,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:29:45,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 16:29:45,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:29:45,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 16:29:45,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2024-06-27 16:29:45,259 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 40 [2024-06-27 16:29:45,259 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 103 transitions, 775 flow. Second operand has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:29:45,259 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:29:45,259 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 40 [2024-06-27 16:29:45,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:29:46,383 INFO L124 PetriNetUnfolderBase]: 10833/15252 cut-off events. [2024-06-27 16:29:46,383 INFO L125 PetriNetUnfolderBase]: For 21941/21941 co-relation queries the response was YES. [2024-06-27 16:29:46,406 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42454 conditions, 15252 events. 10833/15252 cut-off events. For 21941/21941 co-relation queries the response was YES. Maximal size of possible extension queue 755. Compared 83628 event pairs, 1795 based on Foata normal form. 1/13768 useless extension candidates. Maximal degree in co-relation 36253. Up to 4608 conditions per place. [2024-06-27 16:29:46,435 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 143 selfloop transitions, 62 changer transitions 1/207 dead transitions. [2024-06-27 16:29:46,435 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 207 transitions, 1605 flow [2024-06-27 16:29:46,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 16:29:46,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 16:29:46,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 184 transitions. [2024-06-27 16:29:46,437 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46 [2024-06-27 16:29:46,437 INFO L175 Difference]: Start difference. First operand has 85 places, 103 transitions, 775 flow. Second operand 10 states and 184 transitions. [2024-06-27 16:29:46,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 207 transitions, 1605 flow [2024-06-27 16:29:46,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 207 transitions, 1571 flow, removed 14 selfloop flow, removed 1 redundant places. [2024-06-27 16:29:46,516 INFO L231 Difference]: Finished difference. Result has 97 places, 116 transitions, 1087 flow [2024-06-27 16:29:46,516 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=749, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1087, PETRI_PLACES=97, PETRI_TRANSITIONS=116} [2024-06-27 16:29:46,516 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 60 predicate places. [2024-06-27 16:29:46,517 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 116 transitions, 1087 flow [2024-06-27 16:29:46,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:29:46,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:29:46,517 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:29:46,528 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-06-27 16:29:46,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:29:46,724 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:29:46,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:29:46,724 INFO L85 PathProgramCache]: Analyzing trace with hash -620935228, now seen corresponding path program 4 times [2024-06-27 16:29:46,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:29:46,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787423607] [2024-06-27 16:29:46,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:29:46,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:29:46,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:29:46,921 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:29:46,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:29:46,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787423607] [2024-06-27 16:29:46,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787423607] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:29:46,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872997931] [2024-06-27 16:29:46,922 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 16:29:46,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:29:46,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:29:46,923 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:29:46,926 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-06-27 16:29:46,995 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 16:29:46,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:29:46,996 INFO L262 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 8 conjunts are in the unsatisfiable core [2024-06-27 16:29:46,998 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:29:47,042 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:29:47,043 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-27 16:29:47,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872997931] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:29:47,043 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-06-27 16:29:47,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 11 [2024-06-27 16:29:47,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725565867] [2024-06-27 16:29:47,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:29:47,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 16:29:47,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:29:47,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 16:29:47,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2024-06-27 16:29:47,045 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 40 [2024-06-27 16:29:47,045 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 116 transitions, 1087 flow. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:29:47,045 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:29:47,045 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 40 [2024-06-27 16:29:47,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:29:48,333 INFO L124 PetriNetUnfolderBase]: 13009/18275 cut-off events. [2024-06-27 16:29:48,333 INFO L125 PetriNetUnfolderBase]: For 42012/42012 co-relation queries the response was YES. [2024-06-27 16:29:48,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54544 conditions, 18275 events. 13009/18275 cut-off events. For 42012/42012 co-relation queries the response was YES. Maximal size of possible extension queue 907. Compared 102339 event pairs, 1631 based on Foata normal form. 2/16481 useless extension candidates. Maximal degree in co-relation 46383. Up to 7204 conditions per place. [2024-06-27 16:29:48,417 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 125 selfloop transitions, 73 changer transitions 1/200 dead transitions. [2024-06-27 16:29:48,418 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 200 transitions, 1954 flow [2024-06-27 16:29:48,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 16:29:48,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 16:29:48,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 126 transitions. [2024-06-27 16:29:48,419 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.525 [2024-06-27 16:29:48,419 INFO L175 Difference]: Start difference. First operand has 97 places, 116 transitions, 1087 flow. Second operand 6 states and 126 transitions. [2024-06-27 16:29:48,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 200 transitions, 1954 flow [2024-06-27 16:29:48,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 200 transitions, 1903 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-27 16:29:48,578 INFO L231 Difference]: Finished difference. Result has 101 places, 142 transitions, 1578 flow [2024-06-27 16:29:48,578 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1038, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1578, PETRI_PLACES=101, PETRI_TRANSITIONS=142} [2024-06-27 16:29:48,578 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 64 predicate places. [2024-06-27 16:29:48,578 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 142 transitions, 1578 flow [2024-06-27 16:29:48,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:29:48,579 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:29:48,579 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:29:48,591 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-06-27 16:29:48,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:29:48,792 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:29:48,792 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:29:48,792 INFO L85 PathProgramCache]: Analyzing trace with hash 266528114, now seen corresponding path program 1 times [2024-06-27 16:29:48,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:29:48,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527280330] [2024-06-27 16:29:48,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:29:48,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:29:48,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:29:48,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:29:48,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:29:48,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527280330] [2024-06-27 16:29:48,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527280330] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:29:48,859 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:29:48,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 16:29:48,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802724600] [2024-06-27 16:29:48,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:29:48,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 16:29:48,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:29:48,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 16:29:48,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-27 16:29:48,860 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 40 [2024-06-27 16:29:48,860 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 142 transitions, 1578 flow. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:29:48,860 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:29:48,860 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 40 [2024-06-27 16:29:48,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:29:49,748 INFO L124 PetriNetUnfolderBase]: 9206/13342 cut-off events. [2024-06-27 16:29:49,749 INFO L125 PetriNetUnfolderBase]: For 42788/42788 co-relation queries the response was YES. [2024-06-27 16:29:49,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41447 conditions, 13342 events. 9206/13342 cut-off events. For 42788/42788 co-relation queries the response was YES. Maximal size of possible extension queue 686. Compared 76304 event pairs, 4454 based on Foata normal form. 0/12396 useless extension candidates. Maximal degree in co-relation 35719. Up to 6563 conditions per place. [2024-06-27 16:29:49,799 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 123 selfloop transitions, 17 changer transitions 18/159 dead transitions. [2024-06-27 16:29:49,799 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 159 transitions, 1734 flow [2024-06-27 16:29:49,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 16:29:49,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 16:29:49,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 106 transitions. [2024-06-27 16:29:49,800 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44166666666666665 [2024-06-27 16:29:49,800 INFO L175 Difference]: Start difference. First operand has 101 places, 142 transitions, 1578 flow. Second operand 6 states and 106 transitions. [2024-06-27 16:29:49,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 159 transitions, 1734 flow [2024-06-27 16:29:49,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 159 transitions, 1658 flow, removed 27 selfloop flow, removed 2 redundant places. [2024-06-27 16:29:49,954 INFO L231 Difference]: Finished difference. Result has 104 places, 107 transitions, 1034 flow [2024-06-27 16:29:49,954 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1217, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1034, PETRI_PLACES=104, PETRI_TRANSITIONS=107} [2024-06-27 16:29:49,955 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 67 predicate places. [2024-06-27 16:29:49,955 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 107 transitions, 1034 flow [2024-06-27 16:29:49,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:29:49,955 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:29:49,955 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:29:49,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 16:29:49,955 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:29:49,956 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:29:49,956 INFO L85 PathProgramCache]: Analyzing trace with hash 201310246, now seen corresponding path program 1 times [2024-06-27 16:29:49,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:29:49,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378033831] [2024-06-27 16:29:49,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:29:49,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:29:49,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:29:50,050 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:29:50,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:29:50,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378033831] [2024-06-27 16:29:50,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378033831] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:29:50,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:29:50,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 16:29:50,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479448604] [2024-06-27 16:29:50,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:29:50,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 16:29:50,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:29:50,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 16:29:50,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-27 16:29:50,051 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 40 [2024-06-27 16:29:50,051 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 107 transitions, 1034 flow. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:29:50,051 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:29:50,051 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 40 [2024-06-27 16:29:50,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:29:50,649 INFO L124 PetriNetUnfolderBase]: 5982/8573 cut-off events. [2024-06-27 16:29:50,649 INFO L125 PetriNetUnfolderBase]: For 24742/24742 co-relation queries the response was YES. [2024-06-27 16:29:50,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26268 conditions, 8573 events. 5982/8573 cut-off events. For 24742/24742 co-relation queries the response was YES. Maximal size of possible extension queue 454. Compared 45208 event pairs, 3421 based on Foata normal form. 0/8258 useless extension candidates. Maximal degree in co-relation 26184. Up to 6344 conditions per place. [2024-06-27 16:29:50,678 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 73 selfloop transitions, 2 changer transitions 62/138 dead transitions. [2024-06-27 16:29:50,678 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 138 transitions, 1367 flow [2024-06-27 16:29:50,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 16:29:50,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 16:29:50,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 105 transitions. [2024-06-27 16:29:50,679 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-27 16:29:50,679 INFO L175 Difference]: Start difference. First operand has 104 places, 107 transitions, 1034 flow. Second operand 6 states and 105 transitions. [2024-06-27 16:29:50,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 138 transitions, 1367 flow [2024-06-27 16:29:50,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 138 transitions, 1301 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-06-27 16:29:50,720 INFO L231 Difference]: Finished difference. Result has 99 places, 76 transitions, 617 flow [2024-06-27 16:29:50,720 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=863, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=617, PETRI_PLACES=99, PETRI_TRANSITIONS=76} [2024-06-27 16:29:50,721 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 62 predicate places. [2024-06-27 16:29:50,721 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 76 transitions, 617 flow [2024-06-27 16:29:50,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:29:50,721 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:29:50,721 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:29:50,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 16:29:50,721 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:29:50,722 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:29:50,722 INFO L85 PathProgramCache]: Analyzing trace with hash -547912946, now seen corresponding path program 1 times [2024-06-27 16:29:50,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:29:50,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987256297] [2024-06-27 16:29:50,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:29:50,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:29:50,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:29:50,776 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:29:50,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:29:50,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987256297] [2024-06-27 16:29:50,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987256297] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:29:50,776 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:29:50,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 16:29:50,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603802167] [2024-06-27 16:29:50,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:29:50,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 16:29:50,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:29:50,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 16:29:50,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-27 16:29:50,778 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 40 [2024-06-27 16:29:50,778 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 76 transitions, 617 flow. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:29:50,778 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:29:50,778 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 40 [2024-06-27 16:29:50,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:29:51,125 INFO L124 PetriNetUnfolderBase]: 3539/4972 cut-off events. [2024-06-27 16:29:51,126 INFO L125 PetriNetUnfolderBase]: For 11639/11639 co-relation queries the response was YES. [2024-06-27 16:29:51,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14991 conditions, 4972 events. 3539/4972 cut-off events. For 11639/11639 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 23060 event pairs, 1737 based on Foata normal form. 154/5124 useless extension candidates. Maximal degree in co-relation 14957. Up to 3059 conditions per place. [2024-06-27 16:29:51,142 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 47 selfloop transitions, 2 changer transitions 52/102 dead transitions. [2024-06-27 16:29:51,142 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 102 transitions, 836 flow [2024-06-27 16:29:51,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 16:29:51,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 16:29:51,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 101 transitions. [2024-06-27 16:29:51,144 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42083333333333334 [2024-06-27 16:29:51,144 INFO L175 Difference]: Start difference. First operand has 99 places, 76 transitions, 617 flow. Second operand 6 states and 101 transitions. [2024-06-27 16:29:51,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 102 transitions, 836 flow [2024-06-27 16:29:51,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 102 transitions, 763 flow, removed 25 selfloop flow, removed 14 redundant places. [2024-06-27 16:29:51,168 INFO L231 Difference]: Finished difference. Result has 78 places, 50 transitions, 263 flow [2024-06-27 16:29:51,169 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=461, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=263, PETRI_PLACES=78, PETRI_TRANSITIONS=50} [2024-06-27 16:29:51,169 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 41 predicate places. [2024-06-27 16:29:51,169 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 50 transitions, 263 flow [2024-06-27 16:29:51,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:29:51,170 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:29:51,170 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:29:51,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 16:29:51,170 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:29:51,170 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:29:51,170 INFO L85 PathProgramCache]: Analyzing trace with hash 1287902156, now seen corresponding path program 1 times [2024-06-27 16:29:51,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:29:51,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331267504] [2024-06-27 16:29:51,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:29:51,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:29:51,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:29:51,251 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:29:51,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:29:51,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331267504] [2024-06-27 16:29:51,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331267504] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:29:51,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884432601] [2024-06-27 16:29:51,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:29:51,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:29:51,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:29:51,253 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:29:51,276 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-06-27 16:29:51,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:29:51,338 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 10 conjunts are in the unsatisfiable core [2024-06-27 16:29:51,342 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:29:51,397 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:29:51,397 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:29:51,461 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:29:51,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884432601] provided 1 perfect and 1 imperfect interpolant sequences [2024-06-27 16:29:51,463 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-06-27 16:29:51,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 13 [2024-06-27 16:29:51,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905521341] [2024-06-27 16:29:51,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:29:51,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 16:29:51,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:29:51,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 16:29:51,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2024-06-27 16:29:51,465 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 40 [2024-06-27 16:29:51,466 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 50 transitions, 263 flow. Second operand has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:29:51,466 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:29:51,466 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 40 [2024-06-27 16:29:51,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:29:51,741 INFO L124 PetriNetUnfolderBase]: 3117/4283 cut-off events. [2024-06-27 16:29:51,741 INFO L125 PetriNetUnfolderBase]: For 6731/6731 co-relation queries the response was YES. [2024-06-27 16:29:51,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12460 conditions, 4283 events. 3117/4283 cut-off events. For 6731/6731 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 17869 event pairs, 1432 based on Foata normal form. 154/4205 useless extension candidates. Maximal degree in co-relation 12435. Up to 2238 conditions per place. [2024-06-27 16:29:51,756 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 69 selfloop transitions, 9 changer transitions 0/79 dead transitions. [2024-06-27 16:29:51,756 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 79 transitions, 561 flow [2024-06-27 16:29:51,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 16:29:51,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 16:29:51,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 89 transitions. [2024-06-27 16:29:51,757 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31785714285714284 [2024-06-27 16:29:51,757 INFO L175 Difference]: Start difference. First operand has 78 places, 50 transitions, 263 flow. Second operand 7 states and 89 transitions. [2024-06-27 16:29:51,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 79 transitions, 561 flow [2024-06-27 16:29:51,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 79 transitions, 489 flow, removed 34 selfloop flow, removed 13 redundant places. [2024-06-27 16:29:51,772 INFO L231 Difference]: Finished difference. Result has 58 places, 51 transitions, 256 flow [2024-06-27 16:29:51,772 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=221, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=256, PETRI_PLACES=58, PETRI_TRANSITIONS=51} [2024-06-27 16:29:51,772 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 21 predicate places. [2024-06-27 16:29:51,773 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 51 transitions, 256 flow [2024-06-27 16:29:51,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:29:51,773 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:29:51,773 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:29:51,791 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-06-27 16:29:51,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:29:51,992 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:29:51,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:29:51,993 INFO L85 PathProgramCache]: Analyzing trace with hash -57540264, now seen corresponding path program 1 times [2024-06-27 16:29:51,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:29:51,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407407194] [2024-06-27 16:29:51,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:29:51,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:29:52,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:29:52,100 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:29:52,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:29:52,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407407194] [2024-06-27 16:29:52,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407407194] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:29:52,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:29:52,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 16:29:52,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954651398] [2024-06-27 16:29:52,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:29:52,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 16:29:52,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:29:52,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 16:29:52,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 16:29:52,102 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 40 [2024-06-27 16:29:52,102 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 51 transitions, 256 flow. Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:29:52,102 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:29:52,102 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 40 [2024-06-27 16:29:52,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:29:52,456 INFO L124 PetriNetUnfolderBase]: 3117/4279 cut-off events. [2024-06-27 16:29:52,456 INFO L125 PetriNetUnfolderBase]: For 4126/4126 co-relation queries the response was YES. [2024-06-27 16:29:52,461 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11997 conditions, 4279 events. 3117/4279 cut-off events. For 4126/4126 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 18172 event pairs, 1309 based on Foata normal form. 2/3856 useless extension candidates. Maximal degree in co-relation 11981. Up to 2752 conditions per place. [2024-06-27 16:29:52,470 INFO L140 encePairwiseOnDemand]: 36/40 looper letters, 67 selfloop transitions, 3 changer transitions 26/97 dead transitions. [2024-06-27 16:29:52,470 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 97 transitions, 625 flow [2024-06-27 16:29:52,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 16:29:52,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 16:29:52,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 90 transitions. [2024-06-27 16:29:52,471 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-06-27 16:29:52,471 INFO L175 Difference]: Start difference. First operand has 58 places, 51 transitions, 256 flow. Second operand 4 states and 90 transitions. [2024-06-27 16:29:52,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 97 transitions, 625 flow [2024-06-27 16:29:52,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 97 transitions, 612 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-27 16:29:52,477 INFO L231 Difference]: Finished difference. Result has 57 places, 48 transitions, 231 flow [2024-06-27 16:29:52,477 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=243, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=231, PETRI_PLACES=57, PETRI_TRANSITIONS=48} [2024-06-27 16:29:52,477 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 20 predicate places. [2024-06-27 16:29:52,478 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 48 transitions, 231 flow [2024-06-27 16:29:52,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:29:52,478 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:29:52,478 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:29:52,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 16:29:52,478 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:29:52,479 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:29:52,479 INFO L85 PathProgramCache]: Analyzing trace with hash 626686226, now seen corresponding path program 1 times [2024-06-27 16:29:52,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:29:52,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404261733] [2024-06-27 16:29:52,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:29:52,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:29:52,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:29:52,734 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:29:52,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:29:52,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404261733] [2024-06-27 16:29:52,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404261733] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:29:52,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30232958] [2024-06-27 16:29:52,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:29:52,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:29:52,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:29:52,736 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:29:52,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-06-27 16:29:52,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:29:52,830 INFO L262 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 14 conjunts are in the unsatisfiable core [2024-06-27 16:29:52,831 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:29:52,976 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:29:52,977 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:29:53,210 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:29:53,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30232958] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:29:53,210 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:29:53,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2024-06-27 16:29:53,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858758624] [2024-06-27 16:29:53,211 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:29:53,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-06-27 16:29:53,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:29:53,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-06-27 16:29:53,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2024-06-27 16:29:53,212 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 40 [2024-06-27 16:29:53,212 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 48 transitions, 231 flow. Second operand has 20 states, 20 states have (on average 7.8) internal successors, (156), 20 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:29:53,213 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:29:53,213 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 40 [2024-06-27 16:29:53,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:29:54,137 INFO L124 PetriNetUnfolderBase]: 6522/8968 cut-off events. [2024-06-27 16:29:54,137 INFO L125 PetriNetUnfolderBase]: For 9969/9969 co-relation queries the response was YES. [2024-06-27 16:29:54,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25301 conditions, 8968 events. 6522/8968 cut-off events. For 9969/9969 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 43136 event pairs, 1463 based on Foata normal form. 1/8029 useless extension candidates. Maximal degree in co-relation 25284. Up to 3471 conditions per place. [2024-06-27 16:29:54,171 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 131 selfloop transitions, 22 changer transitions 1/155 dead transitions. [2024-06-27 16:29:54,171 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 155 transitions, 957 flow [2024-06-27 16:29:54,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 16:29:54,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 16:29:54,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 184 transitions. [2024-06-27 16:29:54,172 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38333333333333336 [2024-06-27 16:29:54,172 INFO L175 Difference]: Start difference. First operand has 57 places, 48 transitions, 231 flow. Second operand 12 states and 184 transitions. [2024-06-27 16:29:54,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 155 transitions, 957 flow [2024-06-27 16:29:54,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 155 transitions, 923 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-27 16:29:54,187 INFO L231 Difference]: Finished difference. Result has 69 places, 63 transitions, 417 flow [2024-06-27 16:29:54,188 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=221, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=417, PETRI_PLACES=69, PETRI_TRANSITIONS=63} [2024-06-27 16:29:54,188 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 32 predicate places. [2024-06-27 16:29:54,188 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 63 transitions, 417 flow [2024-06-27 16:29:54,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 7.8) internal successors, (156), 20 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:29:54,189 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:29:54,189 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:29:54,200 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-06-27 16:29:54,400 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,SelfDestructingSolverStorable14 [2024-06-27 16:29:54,400 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:29:54,400 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:29:54,400 INFO L85 PathProgramCache]: Analyzing trace with hash -1134680602, now seen corresponding path program 2 times [2024-06-27 16:29:54,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:29:54,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292299265] [2024-06-27 16:29:54,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:29:54,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:29:54,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:29:54,621 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:29:54,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:29:54,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292299265] [2024-06-27 16:29:54,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292299265] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:29:54,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364422962] [2024-06-27 16:29:54,622 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 16:29:54,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:29:54,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:29:54,624 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:29:54,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-06-27 16:29:54,715 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-06-27 16:29:54,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:29:54,717 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 15 conjunts are in the unsatisfiable core [2024-06-27 16:29:54,718 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:29:54,868 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:29:54,869 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-27 16:29:54,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364422962] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:29:54,869 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-06-27 16:29:54,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 14 [2024-06-27 16:29:54,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891883540] [2024-06-27 16:29:54,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:29:54,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 16:29:54,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:29:54,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 16:29:54,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2024-06-27 16:29:54,871 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 40 [2024-06-27 16:29:54,871 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 63 transitions, 417 flow. Second operand has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 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 16:29:54,871 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:29:54,871 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 40 [2024-06-27 16:29:54,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:29:55,615 INFO L124 PetriNetUnfolderBase]: 6522/8966 cut-off events. [2024-06-27 16:29:55,615 INFO L125 PetriNetUnfolderBase]: For 14385/14385 co-relation queries the response was YES. [2024-06-27 16:29:55,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26132 conditions, 8966 events. 6522/8966 cut-off events. For 14385/14385 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 43146 event pairs, 1563 based on Foata normal form. 1/8028 useless extension candidates. Maximal degree in co-relation 26111. Up to 3471 conditions per place. [2024-06-27 16:29:55,651 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 134 selfloop transitions, 20 changer transitions 1/156 dead transitions. [2024-06-27 16:29:55,651 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 156 transitions, 1070 flow [2024-06-27 16:29:55,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 16:29:55,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 16:29:55,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 173 transitions. [2024-06-27 16:29:55,653 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4325 [2024-06-27 16:29:55,653 INFO L175 Difference]: Start difference. First operand has 69 places, 63 transitions, 417 flow. Second operand 10 states and 173 transitions. [2024-06-27 16:29:55,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 156 transitions, 1070 flow [2024-06-27 16:29:55,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 156 transitions, 1051 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-27 16:29:55,676 INFO L231 Difference]: Finished difference. Result has 78 places, 69 transitions, 531 flow [2024-06-27 16:29:55,677 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=398, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=531, PETRI_PLACES=78, PETRI_TRANSITIONS=69} [2024-06-27 16:29:55,677 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 41 predicate places. [2024-06-27 16:29:55,677 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 69 transitions, 531 flow [2024-06-27 16:29:55,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 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 16:29:55,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:29:55,678 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:29:55,688 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-06-27 16:29:55,888 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,SelfDestructingSolverStorable15 [2024-06-27 16:29:55,888 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:29:55,888 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:29:55,888 INFO L85 PathProgramCache]: Analyzing trace with hash -548762382, now seen corresponding path program 3 times [2024-06-27 16:29:55,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:29:55,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662666496] [2024-06-27 16:29:55,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:29:55,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:29:55,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:29:56,106 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:29:56,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:29:56,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662666496] [2024-06-27 16:29:56,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662666496] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:29:56,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809146515] [2024-06-27 16:29:56,107 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 16:29:56,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:29:56,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:29:56,108 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:29:56,112 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-06-27 16:29:56,195 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-06-27 16:29:56,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:29:56,196 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 15 conjunts are in the unsatisfiable core [2024-06-27 16:29:56,203 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:29:56,340 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:29:56,340 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-27 16:29:56,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809146515] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:29:56,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-06-27 16:29:56,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 15 [2024-06-27 16:29:56,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807880921] [2024-06-27 16:29:56,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:29:56,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 16:29:56,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:29:56,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 16:29:56,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2024-06-27 16:29:56,342 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 40 [2024-06-27 16:29:56,342 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 69 transitions, 531 flow. Second operand has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 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 16:29:56,342 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:29:56,342 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 40 [2024-06-27 16:29:56,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:29:57,093 INFO L124 PetriNetUnfolderBase]: 7121/9877 cut-off events. [2024-06-27 16:29:57,094 INFO L125 PetriNetUnfolderBase]: For 21357/21357 co-relation queries the response was YES. [2024-06-27 16:29:57,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29610 conditions, 9877 events. 7121/9877 cut-off events. For 21357/21357 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 49227 event pairs, 1821 based on Foata normal form. 1/8890 useless extension candidates. Maximal degree in co-relation 29586. Up to 3471 conditions per place. [2024-06-27 16:29:57,127 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 143 selfloop transitions, 26 changer transitions 1/171 dead transitions. [2024-06-27 16:29:57,127 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 171 transitions, 1291 flow [2024-06-27 16:29:57,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 16:29:57,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 16:29:57,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 179 transitions. [2024-06-27 16:29:57,128 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4475 [2024-06-27 16:29:57,128 INFO L175 Difference]: Start difference. First operand has 78 places, 69 transitions, 531 flow. Second operand 10 states and 179 transitions. [2024-06-27 16:29:57,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 171 transitions, 1291 flow [2024-06-27 16:29:57,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 171 transitions, 1251 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-27 16:29:57,164 INFO L231 Difference]: Finished difference. Result has 86 places, 77 transitions, 688 flow [2024-06-27 16:29:57,164 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=495, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=688, PETRI_PLACES=86, PETRI_TRANSITIONS=77} [2024-06-27 16:29:57,164 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 49 predicate places. [2024-06-27 16:29:57,165 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 77 transitions, 688 flow [2024-06-27 16:29:57,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 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 16:29:57,165 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:29:57,165 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:29:57,176 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-06-27 16:29:57,371 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,SelfDestructingSolverStorable16 [2024-06-27 16:29:57,371 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:29:57,371 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:29:57,371 INFO L85 PathProgramCache]: Analyzing trace with hash 180881828, now seen corresponding path program 4 times [2024-06-27 16:29:57,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:29:57,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099610642] [2024-06-27 16:29:57,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:29:57,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:29:57,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:29:57,570 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:29:57,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:29:57,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099610642] [2024-06-27 16:29:57,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099610642] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:29:57,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124316834] [2024-06-27 16:29:57,571 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 16:29:57,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:29:57,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:29:57,581 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:29:57,583 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-06-27 16:29:57,655 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 16:29:57,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:29:57,656 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 8 conjunts are in the unsatisfiable core [2024-06-27 16:29:57,657 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:29:57,744 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:29:57,744 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:29:57,995 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:29:57,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124316834] provided 1 perfect and 1 imperfect interpolant sequences [2024-06-27 16:29:57,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-06-27 16:29:57,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9, 7] total 19 [2024-06-27 16:29:57,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875669317] [2024-06-27 16:29:57,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:29:57,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 16:29:57,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:29:57,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 16:29:57,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2024-06-27 16:29:57,997 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 40 [2024-06-27 16:29:57,999 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 77 transitions, 688 flow. Second operand has 7 states, 7 states have (on average 7.857142857142857) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:29:57,999 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:29:57,999 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 40 [2024-06-27 16:29:57,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:29:59,492 INFO L124 PetriNetUnfolderBase]: 15416/21930 cut-off events. [2024-06-27 16:29:59,493 INFO L125 PetriNetUnfolderBase]: For 49991/49991 co-relation queries the response was YES. [2024-06-27 16:29:59,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63245 conditions, 21930 events. 15416/21930 cut-off events. For 49991/49991 co-relation queries the response was YES. Maximal size of possible extension queue 919. Compared 129880 event pairs, 1402 based on Foata normal form. 2/19390 useless extension candidates. Maximal degree in co-relation 63217. Up to 7202 conditions per place. [2024-06-27 16:29:59,597 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 182 selfloop transitions, 90 changer transitions 3/276 dead transitions. [2024-06-27 16:29:59,597 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 276 transitions, 2586 flow [2024-06-27 16:29:59,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 16:29:59,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 16:29:59,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 217 transitions. [2024-06-27 16:29:59,598 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49318181818181817 [2024-06-27 16:29:59,598 INFO L175 Difference]: Start difference. First operand has 86 places, 77 transitions, 688 flow. Second operand 11 states and 217 transitions. [2024-06-27 16:29:59,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 276 transitions, 2586 flow [2024-06-27 16:29:59,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 276 transitions, 2480 flow, removed 46 selfloop flow, removed 4 redundant places. [2024-06-27 16:29:59,702 INFO L231 Difference]: Finished difference. Result has 100 places, 154 transitions, 1865 flow [2024-06-27 16:29:59,703 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=652, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1865, PETRI_PLACES=100, PETRI_TRANSITIONS=154} [2024-06-27 16:29:59,703 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 63 predicate places. [2024-06-27 16:29:59,703 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 154 transitions, 1865 flow [2024-06-27 16:29:59,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.857142857142857) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:29:59,703 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:29:59,703 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:29:59,718 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-06-27 16:29:59,916 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,SelfDestructingSolverStorable17 [2024-06-27 16:29:59,916 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:29:59,916 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:29:59,916 INFO L85 PathProgramCache]: Analyzing trace with hash -259686146, now seen corresponding path program 5 times [2024-06-27 16:29:59,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:29:59,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861016219] [2024-06-27 16:29:59,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:29:59,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:29:59,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:30:00,107 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:30:00,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:30:00,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861016219] [2024-06-27 16:30:00,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861016219] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:30:00,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222800036] [2024-06-27 16:30:00,108 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-27 16:30:00,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:30:00,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:30:00,109 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:30:00,110 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-06-27 16:30:00,194 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 16:30:00,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:30:00,196 INFO L262 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 8 conjunts are in the unsatisfiable core [2024-06-27 16:30:00,197 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:30:00,296 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:30:00,296 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:30:00,588 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:30:00,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222800036] provided 1 perfect and 1 imperfect interpolant sequences [2024-06-27 16:30:00,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-06-27 16:30:00,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9, 7] total 19 [2024-06-27 16:30:00,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932561684] [2024-06-27 16:30:00,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:30:00,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 16:30:00,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:30:00,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 16:30:00,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2024-06-27 16:30:00,590 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 40 [2024-06-27 16:30:00,590 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 154 transitions, 1865 flow. Second operand has 7 states, 7 states have (on average 7.857142857142857) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:30:00,590 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:30:00,591 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 40 [2024-06-27 16:30:00,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:30:04,116 INFO L124 PetriNetUnfolderBase]: 26875/38469 cut-off events. [2024-06-27 16:30:04,116 INFO L125 PetriNetUnfolderBase]: For 118541/118541 co-relation queries the response was YES. [2024-06-27 16:30:04,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 128772 conditions, 38469 events. 26875/38469 cut-off events. For 118541/118541 co-relation queries the response was YES. Maximal size of possible extension queue 1550. Compared 246965 event pairs, 3441 based on Foata normal form. 4/36127 useless extension candidates. Maximal degree in co-relation 128737. Up to 16314 conditions per place. [2024-06-27 16:30:04,293 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 201 selfloop transitions, 205 changer transitions 8/415 dead transitions. [2024-06-27 16:30:04,293 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 415 transitions, 4937 flow [2024-06-27 16:30:04,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 16:30:04,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 16:30:04,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 223 transitions. [2024-06-27 16:30:04,294 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5068181818181818 [2024-06-27 16:30:04,294 INFO L175 Difference]: Start difference. First operand has 100 places, 154 transitions, 1865 flow. Second operand 11 states and 223 transitions. [2024-06-27 16:30:04,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 415 transitions, 4937 flow [2024-06-27 16:30:04,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 415 transitions, 4771 flow, removed 83 selfloop flow, removed 0 redundant places. [2024-06-27 16:30:04,821 INFO L231 Difference]: Finished difference. Result has 119 places, 274 transitions, 4103 flow [2024-06-27 16:30:04,822 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1793, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4103, PETRI_PLACES=119, PETRI_TRANSITIONS=274} [2024-06-27 16:30:04,822 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 82 predicate places. [2024-06-27 16:30:04,822 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 274 transitions, 4103 flow [2024-06-27 16:30:04,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.857142857142857) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:30:04,822 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:30:04,822 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:30:04,833 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-06-27 16:30:05,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:30:05,032 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:30:05,032 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:30:05,032 INFO L85 PathProgramCache]: Analyzing trace with hash -1836223824, now seen corresponding path program 6 times [2024-06-27 16:30:05,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:30:05,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043752730] [2024-06-27 16:30:05,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:30:05,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:30:05,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:30:05,240 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:30:05,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:30:05,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043752730] [2024-06-27 16:30:05,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043752730] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:30:05,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518175445] [2024-06-27 16:30:05,241 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-27 16:30:05,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:30:05,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:30:05,242 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:30:05,276 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-06-27 16:30:05,327 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2024-06-27 16:30:05,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:30:05,328 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 15 conjunts are in the unsatisfiable core [2024-06-27 16:30:05,329 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:30:05,552 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:30:05,552 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-27 16:30:05,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518175445] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:30:05,552 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-06-27 16:30:05,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 15 [2024-06-27 16:30:05,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119429012] [2024-06-27 16:30:05,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:30:05,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 16:30:05,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:30:05,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 16:30:05,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2024-06-27 16:30:05,554 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 40 [2024-06-27 16:30:05,555 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 274 transitions, 4103 flow. Second operand has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 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 16:30:05,555 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:30:05,555 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 40 [2024-06-27 16:30:05,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:30:09,610 INFO L124 PetriNetUnfolderBase]: 28139/40216 cut-off events. [2024-06-27 16:30:09,610 INFO L125 PetriNetUnfolderBase]: For 180494/180494 co-relation queries the response was YES. [2024-06-27 16:30:09,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 157121 conditions, 40216 events. 28139/40216 cut-off events. For 180494/180494 co-relation queries the response was YES. Maximal size of possible extension queue 1633. Compared 259667 event pairs, 8220 based on Foata normal form. 6/40221 useless extension candidates. Maximal degree in co-relation 157077. Up to 15519 conditions per place. [2024-06-27 16:30:09,862 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 346 selfloop transitions, 123 changer transitions 2/472 dead transitions. [2024-06-27 16:30:09,862 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 472 transitions, 6755 flow [2024-06-27 16:30:09,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 16:30:09,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 16:30:09,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 176 transitions. [2024-06-27 16:30:09,863 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44 [2024-06-27 16:30:09,863 INFO L175 Difference]: Start difference. First operand has 119 places, 274 transitions, 4103 flow. Second operand 10 states and 176 transitions. [2024-06-27 16:30:09,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 472 transitions, 6755 flow [2024-06-27 16:30:10,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 472 transitions, 6646 flow, removed 50 selfloop flow, removed 2 redundant places. [2024-06-27 16:30:10,821 INFO L231 Difference]: Finished difference. Result has 129 places, 297 transitions, 4836 flow [2024-06-27 16:30:10,821 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4024, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4836, PETRI_PLACES=129, PETRI_TRANSITIONS=297} [2024-06-27 16:30:10,821 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 92 predicate places. [2024-06-27 16:30:10,821 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 297 transitions, 4836 flow [2024-06-27 16:30:10,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 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 16:30:10,822 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:30:10,822 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:30:10,833 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-06-27 16:30:11,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2024-06-27 16:30:11,028 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:30:11,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:30:11,029 INFO L85 PathProgramCache]: Analyzing trace with hash 2012363864, now seen corresponding path program 7 times [2024-06-27 16:30:11,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:30:11,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929659325] [2024-06-27 16:30:11,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:30:11,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:30:11,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:30:11,214 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:30:11,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:30:11,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929659325] [2024-06-27 16:30:11,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929659325] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:30:11,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457968147] [2024-06-27 16:30:11,215 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-06-27 16:30:11,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:30:11,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:30:11,216 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:30:11,217 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 16:30:11,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:30:11,301 INFO L262 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 14 conjunts are in the unsatisfiable core [2024-06-27 16:30:11,302 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:30:11,429 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:30:11,430 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:30:11,712 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:30:11,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457968147] provided 1 perfect and 1 imperfect interpolant sequences [2024-06-27 16:30:11,713 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-06-27 16:30:11,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9, 8] total 21 [2024-06-27 16:30:11,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060460258] [2024-06-27 16:30:11,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:30:11,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 16:30:11,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:30:11,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 16:30:11,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2024-06-27 16:30:11,714 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 40 [2024-06-27 16:30:11,714 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 297 transitions, 4836 flow. Second operand has 9 states, 9 states have (on average 7.0) internal successors, (63), 9 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 16:30:11,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:30:11,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 40 [2024-06-27 16:30:11,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:30:16,234 INFO L124 PetriNetUnfolderBase]: 28139/40208 cut-off events. [2024-06-27 16:30:16,235 INFO L125 PetriNetUnfolderBase]: For 207064/207064 co-relation queries the response was YES. [2024-06-27 16:30:16,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 160170 conditions, 40208 events. 28139/40208 cut-off events. For 207064/207064 co-relation queries the response was YES. Maximal size of possible extension queue 1614. Compared 257811 event pairs, 7261 based on Foata normal form. 4/40211 useless extension candidates. Maximal degree in co-relation 160123. Up to 15457 conditions per place. [2024-06-27 16:30:16,474 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 349 selfloop transitions, 140 changer transitions 2/492 dead transitions. [2024-06-27 16:30:16,474 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 492 transitions, 7371 flow [2024-06-27 16:30:16,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 16:30:16,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 16:30:16,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 185 transitions. [2024-06-27 16:30:16,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42045454545454547 [2024-06-27 16:30:16,485 INFO L175 Difference]: Start difference. First operand has 129 places, 297 transitions, 4836 flow. Second operand 11 states and 185 transitions. [2024-06-27 16:30:16,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 492 transitions, 7371 flow [2024-06-27 16:30:17,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 492 transitions, 7309 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-27 16:30:17,256 INFO L231 Difference]: Finished difference. Result has 139 places, 335 transitions, 5950 flow [2024-06-27 16:30:17,256 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4778, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=297, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5950, PETRI_PLACES=139, PETRI_TRANSITIONS=335} [2024-06-27 16:30:17,257 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 102 predicate places. [2024-06-27 16:30:17,257 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 335 transitions, 5950 flow [2024-06-27 16:30:17,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.0) internal successors, (63), 9 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 16:30:17,257 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:30:17,257 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:30:17,267 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-06-27 16:30:17,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:30:17,460 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:30:17,461 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:30:17,461 INFO L85 PathProgramCache]: Analyzing trace with hash 636664416, now seen corresponding path program 1 times [2024-06-27 16:30:17,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:30:17,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206979283] [2024-06-27 16:30:17,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:30:17,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:30:17,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:30:17,510 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:30:17,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:30:17,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206979283] [2024-06-27 16:30:17,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206979283] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:30:17,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:30:17,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 16:30:17,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357327363] [2024-06-27 16:30:17,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:30:17,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 16:30:17,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:30:17,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 16:30:17,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-27 16:30:17,512 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 40 [2024-06-27 16:30:17,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 335 transitions, 5950 flow. Second operand has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:30:17,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:30:17,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 40 [2024-06-27 16:30:17,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:30:20,686 INFO L124 PetriNetUnfolderBase]: 17828/26039 cut-off events. [2024-06-27 16:30:20,686 INFO L125 PetriNetUnfolderBase]: For 139910/139910 co-relation queries the response was YES. [2024-06-27 16:30:20,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102347 conditions, 26039 events. 17828/26039 cut-off events. For 139910/139910 co-relation queries the response was YES. Maximal size of possible extension queue 1123. Compared 165214 event pairs, 9299 based on Foata normal form. 781/26819 useless extension candidates. Maximal degree in co-relation 102296. Up to 15535 conditions per place. [2024-06-27 16:30:20,812 INFO L140 encePairwiseOnDemand]: 35/40 looper letters, 288 selfloop transitions, 20 changer transitions 3/312 dead transitions. [2024-06-27 16:30:20,812 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 312 transitions, 5117 flow [2024-06-27 16:30:20,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 16:30:20,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 16:30:20,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 96 transitions. [2024-06-27 16:30:20,813 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48 [2024-06-27 16:30:20,813 INFO L175 Difference]: Start difference. First operand has 139 places, 335 transitions, 5950 flow. Second operand 5 states and 96 transitions. [2024-06-27 16:30:20,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 312 transitions, 5117 flow [2024-06-27 16:30:21,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 312 transitions, 4960 flow, removed 47 selfloop flow, removed 8 redundant places. [2024-06-27 16:30:21,380 INFO L231 Difference]: Finished difference. Result has 136 places, 253 transitions, 4014 flow [2024-06-27 16:30:21,380 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3955, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=4014, PETRI_PLACES=136, PETRI_TRANSITIONS=253} [2024-06-27 16:30:21,381 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 99 predicate places. [2024-06-27 16:30:21,381 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 253 transitions, 4014 flow [2024-06-27 16:30:21,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:30:21,381 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:30:21,381 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:30:21,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 16:30:21,381 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:30:21,381 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:30:21,381 INFO L85 PathProgramCache]: Analyzing trace with hash 717504228, now seen corresponding path program 1 times [2024-06-27 16:30:21,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:30:21,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136478964] [2024-06-27 16:30:21,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:30:21,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:30:21,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:30:21,429 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:30:21,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:30:21,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136478964] [2024-06-27 16:30:21,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136478964] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:30:21,430 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:30:21,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 16:30:21,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915819399] [2024-06-27 16:30:21,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:30:21,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 16:30:21,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:30:21,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 16:30:21,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-27 16:30:21,431 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 40 [2024-06-27 16:30:21,431 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 253 transitions, 4014 flow. Second operand has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:30:21,431 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:30:21,431 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 40 [2024-06-27 16:30:21,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:30:23,676 INFO L124 PetriNetUnfolderBase]: 13409/19675 cut-off events. [2024-06-27 16:30:23,676 INFO L125 PetriNetUnfolderBase]: For 96062/96062 co-relation queries the response was YES. [2024-06-27 16:30:23,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75876 conditions, 19675 events. 13409/19675 cut-off events. For 96062/96062 co-relation queries the response was YES. Maximal size of possible extension queue 829. Compared 120384 event pairs, 7824 based on Foata normal form. 404/20078 useless extension candidates. Maximal degree in co-relation 75826. Up to 15535 conditions per place. [2024-06-27 16:30:23,767 INFO L140 encePairwiseOnDemand]: 35/40 looper letters, 157 selfloop transitions, 2 changer transitions 74/234 dead transitions. [2024-06-27 16:30:23,768 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 234 transitions, 3378 flow [2024-06-27 16:30:23,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 16:30:23,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 16:30:23,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 88 transitions. [2024-06-27 16:30:23,768 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44 [2024-06-27 16:30:23,768 INFO L175 Difference]: Start difference. First operand has 136 places, 253 transitions, 4014 flow. Second operand 5 states and 88 transitions. [2024-06-27 16:30:23,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 234 transitions, 3378 flow [2024-06-27 16:30:24,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 234 transitions, 3100 flow, removed 83 selfloop flow, removed 10 redundant places. [2024-06-27 16:30:24,213 INFO L231 Difference]: Finished difference. Result has 131 places, 160 transitions, 1730 flow [2024-06-27 16:30:24,214 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2363, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1730, PETRI_PLACES=131, PETRI_TRANSITIONS=160} [2024-06-27 16:30:24,214 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 94 predicate places. [2024-06-27 16:30:24,214 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 160 transitions, 1730 flow [2024-06-27 16:30:24,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:30:24,214 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:30:24,214 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:30:24,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 16:30:24,215 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:30:24,215 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:30:24,215 INFO L85 PathProgramCache]: Analyzing trace with hash 1630893698, now seen corresponding path program 1 times [2024-06-27 16:30:24,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:30:24,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019548172] [2024-06-27 16:30:24,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:30:24,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:30:24,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:30:24,291 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:30:24,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:30:24,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019548172] [2024-06-27 16:30:24,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019548172] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:30:24,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588609921] [2024-06-27 16:30:24,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:30:24,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:30:24,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:30:24,296 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:30:24,297 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-06-27 16:30:24,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:30:24,387 INFO L262 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 10 conjunts are in the unsatisfiable core [2024-06-27 16:30:24,389 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:30:24,452 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:30:24,452 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:30:24,520 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:30:24,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [588609921] provided 1 perfect and 1 imperfect interpolant sequences [2024-06-27 16:30:24,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-06-27 16:30:24,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 12 [2024-06-27 16:30:24,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410099901] [2024-06-27 16:30:24,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:30:24,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 16:30:24,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:30:24,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 16:30:24,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2024-06-27 16:30:24,522 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 40 [2024-06-27 16:30:24,522 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 160 transitions, 1730 flow. Second operand has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 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 16:30:24,522 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:30:24,522 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 40 [2024-06-27 16:30:24,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:30:25,584 INFO L124 PetriNetUnfolderBase]: 7618/10787 cut-off events. [2024-06-27 16:30:25,585 INFO L125 PetriNetUnfolderBase]: For 44484/44484 co-relation queries the response was YES. [2024-06-27 16:30:25,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43292 conditions, 10787 events. 7618/10787 cut-off events. For 44484/44484 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 56254 event pairs, 2981 based on Foata normal form. 450/11236 useless extension candidates. Maximal degree in co-relation 43246. Up to 5462 conditions per place. [2024-06-27 16:30:25,633 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 149 selfloop transitions, 20 changer transitions 0/170 dead transitions. [2024-06-27 16:30:25,633 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 170 transitions, 2026 flow [2024-06-27 16:30:25,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 16:30:25,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 16:30:25,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 85 transitions. [2024-06-27 16:30:25,634 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30357142857142855 [2024-06-27 16:30:25,634 INFO L175 Difference]: Start difference. First operand has 131 places, 160 transitions, 1730 flow. Second operand 7 states and 85 transitions. [2024-06-27 16:30:25,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 170 transitions, 2026 flow [2024-06-27 16:30:25,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 170 transitions, 1852 flow, removed 85 selfloop flow, removed 18 redundant places. [2024-06-27 16:30:25,762 INFO L231 Difference]: Finished difference. Result has 92 places, 129 transitions, 1264 flow [2024-06-27 16:30:25,762 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1224, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1264, PETRI_PLACES=92, PETRI_TRANSITIONS=129} [2024-06-27 16:30:25,763 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 55 predicate places. [2024-06-27 16:30:25,763 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 129 transitions, 1264 flow [2024-06-27 16:30:25,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 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 16:30:25,763 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:30:25,763 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:30:25,773 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-06-27 16:30:25,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:30:25,963 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:30:25,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:30:25,964 INFO L85 PathProgramCache]: Analyzing trace with hash 851361620, now seen corresponding path program 1 times [2024-06-27 16:30:25,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:30:25,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194636313] [2024-06-27 16:30:25,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:30:25,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:30:25,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:30:26,056 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 16:30:26,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:30:26,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194636313] [2024-06-27 16:30:26,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194636313] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:30:26,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920034370] [2024-06-27 16:30:26,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:30:26,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:30:26,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:30:26,058 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:30:26,061 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-06-27 16:30:26,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:30:26,155 INFO L262 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 10 conjunts are in the unsatisfiable core [2024-06-27 16:30:26,155 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:30:26,218 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:30:26,218 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:30:26,304 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:30:26,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920034370] provided 1 perfect and 1 imperfect interpolant sequences [2024-06-27 16:30:26,305 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-06-27 16:30:26,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 7] total 14 [2024-06-27 16:30:26,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558785261] [2024-06-27 16:30:26,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:30:26,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 16:30:26,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:30:26,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 16:30:26,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2024-06-27 16:30:26,308 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 40 [2024-06-27 16:30:26,308 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 129 transitions, 1264 flow. Second operand has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:30:26,308 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:30:26,308 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 40 [2024-06-27 16:30:26,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:30:27,282 INFO L124 PetriNetUnfolderBase]: 7447/10549 cut-off events. [2024-06-27 16:30:27,282 INFO L125 PetriNetUnfolderBase]: For 34856/34856 co-relation queries the response was YES. [2024-06-27 16:30:27,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40835 conditions, 10549 events. 7447/10549 cut-off events. For 34856/34856 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 53593 event pairs, 2757 based on Foata normal form. 479/11027 useless extension candidates. Maximal degree in co-relation 40805. Up to 5319 conditions per place. [2024-06-27 16:30:27,336 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 134 selfloop transitions, 25 changer transitions 0/160 dead transitions. [2024-06-27 16:30:27,336 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 160 transitions, 1831 flow [2024-06-27 16:30:27,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 16:30:27,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 16:30:27,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 83 transitions. [2024-06-27 16:30:27,338 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29642857142857143 [2024-06-27 16:30:27,338 INFO L175 Difference]: Start difference. First operand has 92 places, 129 transitions, 1264 flow. Second operand 7 states and 83 transitions. [2024-06-27 16:30:27,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 160 transitions, 1831 flow [2024-06-27 16:30:27,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 160 transitions, 1780 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-27 16:30:27,417 INFO L231 Difference]: Finished difference. Result has 92 places, 130 transitions, 1324 flow [2024-06-27 16:30:27,417 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1197, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1324, PETRI_PLACES=92, PETRI_TRANSITIONS=130} [2024-06-27 16:30:27,417 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 55 predicate places. [2024-06-27 16:30:27,417 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 130 transitions, 1324 flow [2024-06-27 16:30:27,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:30:27,418 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:30:27,418 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:30:27,428 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-06-27 16:30:27,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-06-27 16:30:27,618 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:30:27,619 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:30:27,619 INFO L85 PathProgramCache]: Analyzing trace with hash 246087176, now seen corresponding path program 1 times [2024-06-27 16:30:27,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:30:27,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671026407] [2024-06-27 16:30:27,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:30:27,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:30:27,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:30:28,285 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 16:30:28,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:30:28,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671026407] [2024-06-27 16:30:28,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671026407] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:30:28,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188043046] [2024-06-27 16:30:28,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:30:28,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:30:28,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:30:28,288 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:30:28,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-06-27 16:30:28,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:30:28,393 INFO L262 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 26 conjunts are in the unsatisfiable core [2024-06-27 16:30:28,394 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:30:28,617 INFO L349 Elim1Store]: treesize reduction 18, result has 51.4 percent of original size [2024-06-27 16:30:28,617 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 36 [2024-06-27 16:30:28,640 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 16:30:28,641 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:31:01,202 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-06-27 16:31:01,202 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2024-06-27 16:31:01,213 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 16:31:01,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188043046] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:31:01,213 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:31:01,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 27 [2024-06-27 16:31:01,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856907971] [2024-06-27 16:31:01,213 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:31:01,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-06-27 16:31:01,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:31:01,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-06-27 16:31:01,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=601, Unknown=8, NotChecked=0, Total=702 [2024-06-27 16:31:01,214 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 40 [2024-06-27 16:31:01,215 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 130 transitions, 1324 flow. Second operand has 27 states, 27 states have (on average 6.888888888888889) internal successors, (186), 27 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:31:01,215 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:31:01,215 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 40 [2024-06-27 16:31:01,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:31:03,756 INFO L124 PetriNetUnfolderBase]: 11025/15651 cut-off events. [2024-06-27 16:31:03,756 INFO L125 PetriNetUnfolderBase]: For 56198/56198 co-relation queries the response was YES. [2024-06-27 16:31:03,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64232 conditions, 15651 events. 11025/15651 cut-off events. For 56198/56198 co-relation queries the response was YES. Maximal size of possible extension queue 635. Compared 87326 event pairs, 915 based on Foata normal form. 2/15652 useless extension candidates. Maximal degree in co-relation 64202. Up to 8889 conditions per place. [2024-06-27 16:31:03,825 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 356 selfloop transitions, 49 changer transitions 12/418 dead transitions. [2024-06-27 16:31:03,825 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 418 transitions, 4614 flow [2024-06-27 16:31:03,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-06-27 16:31:03,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-06-27 16:31:03,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 255 transitions. [2024-06-27 16:31:03,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-27 16:31:03,827 INFO L175 Difference]: Start difference. First operand has 92 places, 130 transitions, 1324 flow. Second operand 17 states and 255 transitions. [2024-06-27 16:31:03,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 418 transitions, 4614 flow [2024-06-27 16:31:03,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 418 transitions, 4520 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-27 16:31:03,942 INFO L231 Difference]: Finished difference. Result has 112 places, 160 transitions, 1867 flow [2024-06-27 16:31:03,942 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1296, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1867, PETRI_PLACES=112, PETRI_TRANSITIONS=160} [2024-06-27 16:31:03,943 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 75 predicate places. [2024-06-27 16:31:03,943 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 160 transitions, 1867 flow [2024-06-27 16:31:03,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 6.888888888888889) internal successors, (186), 27 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:31:03,943 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:31:03,943 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:31:03,953 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-06-27 16:31:04,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-06-27 16:31:04,144 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:31:04,144 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:31:04,144 INFO L85 PathProgramCache]: Analyzing trace with hash -1915566570, now seen corresponding path program 2 times [2024-06-27 16:31:04,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:31:04,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828009842] [2024-06-27 16:31:04,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:31:04,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:31:04,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:31:04,945 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:31:04,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:31:04,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828009842] [2024-06-27 16:31:04,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828009842] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:31:04,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727178952] [2024-06-27 16:31:04,945 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 16:31:04,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:31:04,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:31:04,947 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:31:04,948 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-06-27 16:31:05,065 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 16:31:05,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:31:05,066 INFO L262 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 40 conjunts are in the unsatisfiable core [2024-06-27 16:31:05,067 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:31:05,288 INFO L349 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2024-06-27 16:31:05,288 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 26 [2024-06-27 16:31:05,310 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 16:31:05,311 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:31:05,968 INFO L349 Elim1Store]: treesize reduction 28, result has 88.8 percent of original size [2024-06-27 16:31:05,969 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 114 treesize of output 254 [2024-06-27 16:31:06,318 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 16:31:06,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727178952] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:31:06,318 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:31:06,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 10] total 26 [2024-06-27 16:31:06,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914335533] [2024-06-27 16:31:06,318 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:31:06,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-06-27 16:31:06,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:31:06,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-06-27 16:31:06,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2024-06-27 16:31:06,319 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 40 [2024-06-27 16:31:06,319 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 160 transitions, 1867 flow. Second operand has 26 states, 26 states have (on average 6.8076923076923075) internal successors, (177), 26 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:31:06,319 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:31:06,319 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 40 [2024-06-27 16:31:06,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:31:08,840 INFO L124 PetriNetUnfolderBase]: 11519/16385 cut-off events. [2024-06-27 16:31:08,840 INFO L125 PetriNetUnfolderBase]: For 76587/76587 co-relation queries the response was YES. [2024-06-27 16:31:08,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72012 conditions, 16385 events. 11519/16385 cut-off events. For 76587/76587 co-relation queries the response was YES. Maximal size of possible extension queue 683. Compared 92251 event pairs, 1374 based on Foata normal form. 2/16387 useless extension candidates. Maximal degree in co-relation 71974. Up to 8931 conditions per place. [2024-06-27 16:31:08,918 INFO L140 encePairwiseOnDemand]: 22/40 looper letters, 342 selfloop transitions, 63 changer transitions 12/418 dead transitions. [2024-06-27 16:31:08,918 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 418 transitions, 4875 flow [2024-06-27 16:31:08,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-06-27 16:31:08,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-06-27 16:31:08,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 261 transitions. [2024-06-27 16:31:08,921 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3625 [2024-06-27 16:31:08,921 INFO L175 Difference]: Start difference. First operand has 112 places, 160 transitions, 1867 flow. Second operand 18 states and 261 transitions. [2024-06-27 16:31:08,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 418 transitions, 4875 flow [2024-06-27 16:31:09,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 418 transitions, 4780 flow, removed 18 selfloop flow, removed 10 redundant places. [2024-06-27 16:31:09,154 INFO L231 Difference]: Finished difference. Result has 123 places, 183 transitions, 2273 flow [2024-06-27 16:31:09,154 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1794, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=2273, PETRI_PLACES=123, PETRI_TRANSITIONS=183} [2024-06-27 16:31:09,154 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 86 predicate places. [2024-06-27 16:31:09,154 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 183 transitions, 2273 flow [2024-06-27 16:31:09,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 6.8076923076923075) internal successors, (177), 26 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:31:09,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:31:09,155 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:31:09,166 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-06-27 16:31:09,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-06-27 16:31:09,359 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:31:09,360 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:31:09,360 INFO L85 PathProgramCache]: Analyzing trace with hash 177258744, now seen corresponding path program 3 times [2024-06-27 16:31:09,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:31:09,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614839931] [2024-06-27 16:31:09,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:31:09,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:31:09,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:31:10,105 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 16:31:10,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:31:10,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614839931] [2024-06-27 16:31:10,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614839931] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:31:10,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768472714] [2024-06-27 16:31:10,105 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 16:31:10,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:31:10,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:31:10,106 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:31:10,124 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-06-27 16:31:10,212 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-06-27 16:31:10,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:31:10,213 INFO L262 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 40 conjunts are in the unsatisfiable core [2024-06-27 16:31:10,214 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:31:10,455 INFO L349 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2024-06-27 16:31:10,456 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 26 [2024-06-27 16:31:10,474 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 16:31:10,474 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:31:11,137 INFO L349 Elim1Store]: treesize reduction 28, result has 88.8 percent of original size [2024-06-27 16:31:11,138 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 114 treesize of output 254 [2024-06-27 16:31:11,468 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 16:31:11,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768472714] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:31:11,468 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:31:11,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 10] total 26 [2024-06-27 16:31:11,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34323807] [2024-06-27 16:31:11,469 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:31:11,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-06-27 16:31:11,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:31:11,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-06-27 16:31:11,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2024-06-27 16:31:11,470 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 40 [2024-06-27 16:31:11,470 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 183 transitions, 2273 flow. Second operand has 26 states, 26 states have (on average 6.769230769230769) internal successors, (176), 26 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:31:11,471 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:31:11,471 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 40 [2024-06-27 16:31:11,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:31:14,009 INFO L124 PetriNetUnfolderBase]: 11417/16217 cut-off events. [2024-06-27 16:31:14,009 INFO L125 PetriNetUnfolderBase]: For 84061/84061 co-relation queries the response was YES. [2024-06-27 16:31:14,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73729 conditions, 16217 events. 11417/16217 cut-off events. For 84061/84061 co-relation queries the response was YES. Maximal size of possible extension queue 677. Compared 91318 event pairs, 1171 based on Foata normal form. 2/16219 useless extension candidates. Maximal degree in co-relation 73690. Up to 8931 conditions per place. [2024-06-27 16:31:14,099 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 367 selfloop transitions, 69 changer transitions 14/451 dead transitions. [2024-06-27 16:31:14,099 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 451 transitions, 5508 flow [2024-06-27 16:31:14,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-06-27 16:31:14,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-06-27 16:31:14,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 270 transitions. [2024-06-27 16:31:14,101 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-27 16:31:14,101 INFO L175 Difference]: Start difference. First operand has 123 places, 183 transitions, 2273 flow. Second operand 18 states and 270 transitions. [2024-06-27 16:31:14,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 451 transitions, 5508 flow [2024-06-27 16:31:14,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 451 transitions, 5437 flow, removed 6 selfloop flow, removed 12 redundant places. [2024-06-27 16:31:14,391 INFO L231 Difference]: Finished difference. Result has 128 places, 186 transitions, 2391 flow [2024-06-27 16:31:14,391 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2208, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=2391, PETRI_PLACES=128, PETRI_TRANSITIONS=186} [2024-06-27 16:31:14,391 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 91 predicate places. [2024-06-27 16:31:14,392 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 186 transitions, 2391 flow [2024-06-27 16:31:14,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 6.769230769230769) internal successors, (176), 26 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:31:14,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:31:14,392 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:31:14,405 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 16:31:14,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:31:14,596 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:31:14,596 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:31:14,596 INFO L85 PathProgramCache]: Analyzing trace with hash 1263873498, now seen corresponding path program 4 times [2024-06-27 16:31:14,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:31:14,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265819968] [2024-06-27 16:31:14,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:31:14,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:31:14,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:31:15,647 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 16:31:15,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:31:15,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265819968] [2024-06-27 16:31:15,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265819968] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:31:15,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039628198] [2024-06-27 16:31:15,648 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 16:31:15,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:31:15,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:31:15,649 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 16:31:15,674 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 16:31:15,754 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 16:31:15,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:31:15,756 INFO L262 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 40 conjunts are in the unsatisfiable core [2024-06-27 16:31:15,757 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:31:16,041 INFO L349 Elim1Store]: treesize reduction 14, result has 57.6 percent of original size [2024-06-27 16:31:16,041 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 36 [2024-06-27 16:31:16,069 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 16:31:16,069 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:31:16,764 INFO L349 Elim1Store]: treesize reduction 28, result has 88.8 percent of original size [2024-06-27 16:31:16,765 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 114 treesize of output 254 [2024-06-27 16:31:16,943 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 16:31:16,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039628198] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:31:16,943 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:31:16,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 10] total 35 [2024-06-27 16:31:16,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888507221] [2024-06-27 16:31:16,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:31:16,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-06-27 16:31:16,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:31:16,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-06-27 16:31:16,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1043, Unknown=0, NotChecked=0, Total=1190 [2024-06-27 16:31:16,946 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 40 [2024-06-27 16:31:16,946 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 186 transitions, 2391 flow. Second operand has 35 states, 35 states have (on average 6.457142857142857) internal successors, (226), 35 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:31:16,946 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:31:16,946 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 40 [2024-06-27 16:31:16,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:31:19,802 INFO L124 PetriNetUnfolderBase]: 13595/19338 cut-off events. [2024-06-27 16:31:19,802 INFO L125 PetriNetUnfolderBase]: For 107164/107164 co-relation queries the response was YES. [2024-06-27 16:31:19,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89436 conditions, 19338 events. 13595/19338 cut-off events. For 107164/107164 co-relation queries the response was YES. Maximal size of possible extension queue 861. Compared 112166 event pairs, 1849 based on Foata normal form. 2/19340 useless extension candidates. Maximal degree in co-relation 89397. Up to 12507 conditions per place. [2024-06-27 16:31:19,916 INFO L140 encePairwiseOnDemand]: 22/40 looper letters, 357 selfloop transitions, 72 changer transitions 12/442 dead transitions. [2024-06-27 16:31:19,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 442 transitions, 5666 flow [2024-06-27 16:31:19,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-06-27 16:31:19,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-06-27 16:31:19,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 254 transitions. [2024-06-27 16:31:19,917 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33421052631578946 [2024-06-27 16:31:19,917 INFO L175 Difference]: Start difference. First operand has 128 places, 186 transitions, 2391 flow. Second operand 19 states and 254 transitions. [2024-06-27 16:31:19,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 442 transitions, 5666 flow [2024-06-27 16:31:20,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 442 transitions, 5485 flow, removed 13 selfloop flow, removed 15 redundant places. [2024-06-27 16:31:20,310 INFO L231 Difference]: Finished difference. Result has 136 places, 211 transitions, 2887 flow [2024-06-27 16:31:20,310 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2266, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=2887, PETRI_PLACES=136, PETRI_TRANSITIONS=211} [2024-06-27 16:31:20,311 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 99 predicate places. [2024-06-27 16:31:20,311 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 211 transitions, 2887 flow [2024-06-27 16:31:20,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 6.457142857142857) internal successors, (226), 35 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:31:20,311 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:31:20,312 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:31:20,322 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 16:31:20,513 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,SelfDestructingSolverStorable28 [2024-06-27 16:31:20,513 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:31:20,513 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:31:20,513 INFO L85 PathProgramCache]: Analyzing trace with hash 1497166448, now seen corresponding path program 5 times [2024-06-27 16:31:20,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:31:20,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774680975] [2024-06-27 16:31:20,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:31:20,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:31:20,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:31:20,992 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 16:31:20,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:31:20,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774680975] [2024-06-27 16:31:20,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774680975] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:31:20,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117951836] [2024-06-27 16:31:20,993 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-27 16:31:20,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:31:20,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:31:20,994 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 16:31:20,994 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 16:31:21,085 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 16:31:21,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:31:21,087 INFO L262 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 40 conjunts are in the unsatisfiable core [2024-06-27 16:31:21,088 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:31:21,299 INFO L349 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2024-06-27 16:31:21,299 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 26 [2024-06-27 16:31:21,320 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 16:31:21,320 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:31:21,956 INFO L349 Elim1Store]: treesize reduction 28, result has 88.8 percent of original size [2024-06-27 16:31:21,956 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 114 treesize of output 254 [2024-06-27 16:31:22,196 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 16:31:22,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117951836] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:31:22,196 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:31:22,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 10] total 25 [2024-06-27 16:31:22,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317110307] [2024-06-27 16:31:22,197 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:31:22,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-06-27 16:31:22,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:31:22,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-06-27 16:31:22,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2024-06-27 16:31:22,198 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 40 [2024-06-27 16:31:22,198 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 211 transitions, 2887 flow. Second operand has 25 states, 25 states have (on average 6.84) internal successors, (171), 25 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:31:22,198 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:31:22,198 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 40 [2024-06-27 16:31:22,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:31:24,864 INFO L124 PetriNetUnfolderBase]: 13567/19310 cut-off events. [2024-06-27 16:31:24,864 INFO L125 PetriNetUnfolderBase]: For 120201/120201 co-relation queries the response was YES. [2024-06-27 16:31:24,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92204 conditions, 19310 events. 13567/19310 cut-off events. For 120201/120201 co-relation queries the response was YES. Maximal size of possible extension queue 862. Compared 112110 event pairs, 1820 based on Foata normal form. 2/19312 useless extension candidates. Maximal degree in co-relation 92161. Up to 12507 conditions per place. [2024-06-27 16:31:25,006 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 367 selfloop transitions, 75 changer transitions 14/457 dead transitions. [2024-06-27 16:31:25,006 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 457 transitions, 6120 flow [2024-06-27 16:31:25,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-06-27 16:31:25,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-06-27 16:31:25,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 251 transitions. [2024-06-27 16:31:25,007 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36911764705882355 [2024-06-27 16:31:25,007 INFO L175 Difference]: Start difference. First operand has 136 places, 211 transitions, 2887 flow. Second operand 17 states and 251 transitions. [2024-06-27 16:31:25,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 457 transitions, 6120 flow [2024-06-27 16:31:25,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 457 transitions, 5987 flow, removed 43 selfloop flow, removed 13 redundant places. [2024-06-27 16:31:25,533 INFO L231 Difference]: Finished difference. Result has 143 places, 231 transitions, 3374 flow [2024-06-27 16:31:25,533 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2806, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=3374, PETRI_PLACES=143, PETRI_TRANSITIONS=231} [2024-06-27 16:31:25,534 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 106 predicate places. [2024-06-27 16:31:25,534 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 231 transitions, 3374 flow [2024-06-27 16:31:25,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 6.84) internal successors, (171), 25 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:31:25,534 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:31:25,534 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:31:25,545 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-06-27 16:31:25,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:31:25,735 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:31:25,735 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:31:25,735 INFO L85 PathProgramCache]: Analyzing trace with hash -1562427080, now seen corresponding path program 6 times [2024-06-27 16:31:25,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:31:25,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25857469] [2024-06-27 16:31:25,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:31:25,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:31:25,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:31:26,569 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 16:31:26,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:31:26,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25857469] [2024-06-27 16:31:26,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25857469] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:31:26,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953121577] [2024-06-27 16:31:26,569 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-27 16:31:26,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:31:26,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:31:26,570 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 16:31:26,571 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 16:31:26,665 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-06-27 16:31:26,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:31:26,666 INFO L262 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 40 conjunts are in the unsatisfiable core [2024-06-27 16:31:26,667 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:31:26,921 INFO L349 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2024-06-27 16:31:26,921 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 26 [2024-06-27 16:31:26,947 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 16:31:26,947 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:31:27,596 INFO L349 Elim1Store]: treesize reduction 28, result has 88.8 percent of original size [2024-06-27 16:31:27,597 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 114 treesize of output 254 [2024-06-27 16:31:28,601 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 16:31:28,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953121577] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:31:28,601 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:31:28,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 10] total 31 [2024-06-27 16:31:28,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632757050] [2024-06-27 16:31:28,601 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:31:28,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-06-27 16:31:28,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:31:28,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-06-27 16:31:28,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=806, Unknown=0, NotChecked=0, Total=930 [2024-06-27 16:31:28,602 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 40 [2024-06-27 16:31:28,603 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 231 transitions, 3374 flow. Second operand has 31 states, 31 states have (on average 6.387096774193548) internal successors, (198), 31 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:31:28,603 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:31:28,603 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 40 [2024-06-27 16:31:28,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:31:31,652 INFO L124 PetriNetUnfolderBase]: 13433/19110 cut-off events. [2024-06-27 16:31:31,652 INFO L125 PetriNetUnfolderBase]: For 129127/129127 co-relation queries the response was YES. [2024-06-27 16:31:31,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92908 conditions, 19110 events. 13433/19110 cut-off events. For 129127/129127 co-relation queries the response was YES. Maximal size of possible extension queue 855. Compared 110745 event pairs, 1767 based on Foata normal form. 2/19112 useless extension candidates. Maximal degree in co-relation 92861. Up to 12507 conditions per place. [2024-06-27 16:31:31,788 INFO L140 encePairwiseOnDemand]: 22/40 looper letters, 355 selfloop transitions, 108 changer transitions 12/476 dead transitions. [2024-06-27 16:31:31,788 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 476 transitions, 6468 flow [2024-06-27 16:31:31,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-06-27 16:31:31,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-06-27 16:31:31,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 277 transitions. [2024-06-27 16:31:31,789 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34625 [2024-06-27 16:31:31,789 INFO L175 Difference]: Start difference. First operand has 143 places, 231 transitions, 3374 flow. Second operand 20 states and 277 transitions. [2024-06-27 16:31:31,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 476 transitions, 6468 flow [2024-06-27 16:31:32,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 476 transitions, 6379 flow, removed 26 selfloop flow, removed 11 redundant places. [2024-06-27 16:31:32,343 INFO L231 Difference]: Finished difference. Result has 154 places, 249 transitions, 3833 flow [2024-06-27 16:31:32,344 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3299, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=3833, PETRI_PLACES=154, PETRI_TRANSITIONS=249} [2024-06-27 16:31:32,344 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 117 predicate places. [2024-06-27 16:31:32,344 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 249 transitions, 3833 flow [2024-06-27 16:31:32,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 6.387096774193548) internal successors, (198), 31 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:31:32,344 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:31:32,344 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:31:32,355 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 16:31:32,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:31:32,548 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:31:32,548 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:31:32,549 INFO L85 PathProgramCache]: Analyzing trace with hash 849135224, now seen corresponding path program 7 times [2024-06-27 16:31:32,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:31:32,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005126312] [2024-06-27 16:31:32,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:31:32,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:31:32,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:31:33,526 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 16:31:33,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:31:33,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005126312] [2024-06-27 16:31:33,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005126312] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:31:33,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024063050] [2024-06-27 16:31:33,526 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-06-27 16:31:33,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:31:33,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:31:33,527 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 16:31:33,528 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 16:31:33,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:31:33,621 INFO L262 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 26 conjunts are in the unsatisfiable core [2024-06-27 16:31:33,622 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:31:33,859 INFO L349 Elim1Store]: treesize reduction 18, result has 51.4 percent of original size [2024-06-27 16:31:33,859 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 36 [2024-06-27 16:31:33,914 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 16:31:33,914 INFO L327 TraceCheckSpWp]: Computing backward predicates...