./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/parallel-misc-1.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/parallel-misc-1.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 faddac23864cc4e42f962ac43a8d0f59593853dbb1d55e3baabe0c76b2187dd4 --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 16:44:34,341 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 16:44:34,405 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 16:44:34,416 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 16:44:34,416 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 16:44:34,450 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 16:44:34,452 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 16:44:34,452 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 16:44:34,453 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 16:44:34,454 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 16:44:34,455 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 16:44:34,455 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 16:44:34,456 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 16:44:34,458 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 16:44:34,458 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 16:44:34,459 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 16:44:34,459 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 16:44:34,462 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 16:44:34,463 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 16:44:34,463 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 16:44:34,463 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 16:44:34,464 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 16:44:34,464 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 16:44:34,464 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 16:44:34,464 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 16:44:34,465 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 16:44:34,465 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 16:44:34,465 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 16:44:34,465 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 16:44:34,466 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 16:44:34,467 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 16:44:34,467 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 16:44:34,467 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 16:44:34,468 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 16:44:34,468 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 16:44:34,468 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 16:44:34,468 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 16:44:34,468 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 16:44:34,469 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 16:44:34,469 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 16:44:34,469 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 16:44:34,469 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 16:44:34,469 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 16:44:34,470 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> faddac23864cc4e42f962ac43a8d0f59593853dbb1d55e3baabe0c76b2187dd4 [2024-06-27 16:44:34,726 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 16:44:34,754 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 16:44:34,756 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 16:44:34,758 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 16:44:34,758 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 16:44:34,759 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/parallel-misc-1.wvr.c [2024-06-27 16:44:35,991 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 16:44:36,180 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 16:44:36,181 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-misc-1.wvr.c [2024-06-27 16:44:36,188 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4fb63968b/b3ed615fd4934e2583a6a8e5b2df0957/FLAG477371f3e [2024-06-27 16:44:36,202 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4fb63968b/b3ed615fd4934e2583a6a8e5b2df0957 [2024-06-27 16:44:36,205 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 16:44:36,207 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-06-27 16:44:36,209 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 16:44:36,209 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 16:44:36,214 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 16:44:36,216 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 04:44:36" (1/1) ... [2024-06-27 16:44:36,217 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2160f37c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:44:36, skipping insertion in model container [2024-06-27 16:44:36,217 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 04:44:36" (1/1) ... [2024-06-27 16:44:36,240 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 16:44:36,505 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/parallel-misc-1.wvr.c[2781,2794] [2024-06-27 16:44:36,527 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 16:44:36,537 INFO L202 MainTranslator]: Completed pre-run [2024-06-27 16:44:36,569 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/parallel-misc-1.wvr.c[2781,2794] [2024-06-27 16:44:36,575 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 16:44:36,595 INFO L206 MainTranslator]: Completed translation [2024-06-27 16:44:36,596 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:44:36 WrapperNode [2024-06-27 16:44:36,596 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 16:44:36,597 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 16:44:36,597 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 16:44:36,597 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 16:44:36,603 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:44:36" (1/1) ... [2024-06-27 16:44:36,622 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:44:36" (1/1) ... [2024-06-27 16:44:36,660 INFO L138 Inliner]: procedures = 22, calls = 31, calls flagged for inlining = 17, calls inlined = 31, statements flattened = 277 [2024-06-27 16:44:36,661 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 16:44:36,662 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 16:44:36,663 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 16:44:36,663 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 16:44:36,673 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:44:36" (1/1) ... [2024-06-27 16:44:36,673 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:44:36" (1/1) ... [2024-06-27 16:44:36,686 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:44:36" (1/1) ... [2024-06-27 16:44:36,709 INFO L175 MemorySlicer]: Split 9 memory accesses to 2 slices as follows [2, 7]. 78 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-06-27 16:44:36,714 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:44:36" (1/1) ... [2024-06-27 16:44:36,714 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:44:36" (1/1) ... [2024-06-27 16:44:36,726 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:44:36" (1/1) ... [2024-06-27 16:44:36,744 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:44:36" (1/1) ... [2024-06-27 16:44:36,745 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:44:36" (1/1) ... [2024-06-27 16:44:36,747 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:44:36" (1/1) ... [2024-06-27 16:44:36,753 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 16:44:36,754 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 16:44:36,754 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 16:44:36,754 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 16:44:36,755 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:44:36" (1/1) ... [2024-06-27 16:44:36,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 16:44:36,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:44:36,789 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 16:44:36,799 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 16:44:36,835 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 16:44:36,836 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-06-27 16:44:36,836 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-06-27 16:44:36,836 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-06-27 16:44:36,836 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-06-27 16:44:36,836 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 16:44:36,837 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-27 16:44:36,837 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-27 16:44:36,837 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-27 16:44:36,837 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-06-27 16:44:36,837 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 16:44:36,837 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 16:44:36,838 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-27 16:44:36,838 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-27 16:44:36,839 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 16:44:36,942 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 16:44:36,944 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 16:44:37,352 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 16:44:37,352 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 16:44:37,766 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 16:44:37,766 INFO L320 CfgBuilder]: Removed 3 assume(true) statements. [2024-06-27 16:44:37,767 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 04:44:37 BoogieIcfgContainer [2024-06-27 16:44:37,767 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 16:44:37,769 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 16:44:37,770 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 16:44:37,773 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 16:44:37,773 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 04:44:36" (1/3) ... [2024-06-27 16:44:37,773 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13c9f19f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 04:44:37, skipping insertion in model container [2024-06-27 16:44:37,774 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:44:36" (2/3) ... [2024-06-27 16:44:37,774 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13c9f19f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 04:44:37, skipping insertion in model container [2024-06-27 16:44:37,774 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 04:44:37" (3/3) ... [2024-06-27 16:44:37,775 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-misc-1.wvr.c [2024-06-27 16:44:37,784 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2024-06-27 16:44:37,793 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 16:44:37,793 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-06-27 16:44:37,793 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 16:44:37,872 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-06-27 16:44:37,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 24 places, 20 transitions, 54 flow [2024-06-27 16:44:37,967 INFO L124 PetriNetUnfolderBase]: 3/18 cut-off events. [2024-06-27 16:44:37,967 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-06-27 16:44:37,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27 conditions, 18 events. 3/18 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 10 event pairs, 0 based on Foata normal form. 0/14 useless extension candidates. Maximal degree in co-relation 11. Up to 2 conditions per place. [2024-06-27 16:44:37,971 INFO L82 GeneralOperation]: Start removeDead. Operand has 24 places, 20 transitions, 54 flow [2024-06-27 16:44:37,974 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 21 places, 17 transitions, 46 flow [2024-06-27 16:44:37,991 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 16:44:37,999 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;@293bbe27, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 16:44:37,999 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-06-27 16:44:38,009 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 16:44:38,010 INFO L124 PetriNetUnfolderBase]: 3/16 cut-off events. [2024-06-27 16:44:38,010 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-06-27 16:44:38,010 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:44:38,011 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:44:38,013 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:44:38,019 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:44:38,019 INFO L85 PathProgramCache]: Analyzing trace with hash 21008040, now seen corresponding path program 1 times [2024-06-27 16:44:38,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:44:38,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570370410] [2024-06-27 16:44:38,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:44:38,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:44:38,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:44:38,638 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 16:44:38,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:44:38,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570370410] [2024-06-27 16:44:38,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570370410] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:44:38,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:44:38,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 16:44:38,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587952190] [2024-06-27 16:44:38,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:44:38,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 16:44:38,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:44:38,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 16:44:38,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-27 16:44:38,684 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-06-27 16:44:38,687 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 46 flow. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:44:38,687 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:44:38,688 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-06-27 16:44:38,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:44:38,846 INFO L124 PetriNetUnfolderBase]: 93/152 cut-off events. [2024-06-27 16:44:38,846 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2024-06-27 16:44:38,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 324 conditions, 152 events. 93/152 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 431 event pairs, 8 based on Foata normal form. 1/95 useless extension candidates. Maximal degree in co-relation 267. Up to 102 conditions per place. [2024-06-27 16:44:38,851 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 25 selfloop transitions, 10 changer transitions 1/39 dead transitions. [2024-06-27 16:44:38,852 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 39 transitions, 177 flow [2024-06-27 16:44:38,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 16:44:38,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 16:44:38,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 62 transitions. [2024-06-27 16:44:38,863 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.62 [2024-06-27 16:44:38,865 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 46 flow. Second operand 5 states and 62 transitions. [2024-06-27 16:44:38,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 39 transitions, 177 flow [2024-06-27 16:44:38,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 39 transitions, 159 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-27 16:44:38,871 INFO L231 Difference]: Finished difference. Result has 24 places, 26 transitions, 101 flow [2024-06-27 16:44:38,872 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=101, PETRI_PLACES=24, PETRI_TRANSITIONS=26} [2024-06-27 16:44:38,875 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 3 predicate places. [2024-06-27 16:44:38,876 INFO L495 AbstractCegarLoop]: Abstraction has has 24 places, 26 transitions, 101 flow [2024-06-27 16:44:38,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:44:38,877 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:44:38,877 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:44:38,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 16:44:38,878 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:44:38,878 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:44:38,878 INFO L85 PathProgramCache]: Analyzing trace with hash -1326643493, now seen corresponding path program 1 times [2024-06-27 16:44:38,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:44:38,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563114258] [2024-06-27 16:44:38,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:44:38,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:44:38,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:44:39,035 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 16:44:39,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:44:39,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563114258] [2024-06-27 16:44:39,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563114258] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:44:39,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:44:39,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 16:44:39,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780840854] [2024-06-27 16:44:39,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:44:39,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 16:44:39,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:44:39,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 16:44:39,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 16:44:39,041 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-06-27 16:44:39,043 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 26 transitions, 101 flow. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:44:39,043 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:44:39,043 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-06-27 16:44:39,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:44:39,166 INFO L124 PetriNetUnfolderBase]: 121/208 cut-off events. [2024-06-27 16:44:39,167 INFO L125 PetriNetUnfolderBase]: For 166/166 co-relation queries the response was YES. [2024-06-27 16:44:39,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 652 conditions, 208 events. 121/208 cut-off events. For 166/166 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 709 event pairs, 41 based on Foata normal form. 8/192 useless extension candidates. Maximal degree in co-relation 368. Up to 107 conditions per place. [2024-06-27 16:44:39,170 INFO L140 encePairwiseOnDemand]: 15/20 looper letters, 31 selfloop transitions, 6 changer transitions 0/40 dead transitions. [2024-06-27 16:44:39,170 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 40 transitions, 230 flow [2024-06-27 16:44:39,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 16:44:39,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 16:44:39,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 45 transitions. [2024-06-27 16:44:39,173 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-06-27 16:44:39,173 INFO L175 Difference]: Start difference. First operand has 24 places, 26 transitions, 101 flow. Second operand 4 states and 45 transitions. [2024-06-27 16:44:39,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 40 transitions, 230 flow [2024-06-27 16:44:39,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 40 transitions, 224 flow, removed 3 selfloop flow, removed 0 redundant places. [2024-06-27 16:44:39,179 INFO L231 Difference]: Finished difference. Result has 30 places, 30 transitions, 153 flow [2024-06-27 16:44:39,179 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=97, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=153, PETRI_PLACES=30, PETRI_TRANSITIONS=30} [2024-06-27 16:44:39,180 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 9 predicate places. [2024-06-27 16:44:39,180 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 30 transitions, 153 flow [2024-06-27 16:44:39,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:44:39,181 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:44:39,182 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:44:39,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 16:44:39,182 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:44:39,183 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:44:39,183 INFO L85 PathProgramCache]: Analyzing trace with hash 2063276826, now seen corresponding path program 1 times [2024-06-27 16:44:39,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:44:39,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195961818] [2024-06-27 16:44:39,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:44:39,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:44:39,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:44:39,288 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 16:44:39,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:44:39,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195961818] [2024-06-27 16:44:39,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195961818] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:44:39,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:44:39,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 16:44:39,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031933928] [2024-06-27 16:44:39,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:44:39,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 16:44:39,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:44:39,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 16:44:39,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 16:44:39,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-06-27 16:44:39,291 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 30 transitions, 153 flow. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:44:39,292 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:44:39,292 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-06-27 16:44:39,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:44:39,398 INFO L124 PetriNetUnfolderBase]: 96/171 cut-off events. [2024-06-27 16:44:39,399 INFO L125 PetriNetUnfolderBase]: For 310/310 co-relation queries the response was YES. [2024-06-27 16:44:39,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 599 conditions, 171 events. 96/171 cut-off events. For 310/310 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 562 event pairs, 26 based on Foata normal form. 5/169 useless extension candidates. Maximal degree in co-relation 497. Up to 88 conditions per place. [2024-06-27 16:44:39,403 INFO L140 encePairwiseOnDemand]: 15/20 looper letters, 28 selfloop transitions, 4 changer transitions 4/39 dead transitions. [2024-06-27 16:44:39,404 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 39 transitions, 268 flow [2024-06-27 16:44:39,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 16:44:39,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 16:44:39,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 44 transitions. [2024-06-27 16:44:39,407 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55 [2024-06-27 16:44:39,407 INFO L175 Difference]: Start difference. First operand has 30 places, 30 transitions, 153 flow. Second operand 4 states and 44 transitions. [2024-06-27 16:44:39,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 39 transitions, 268 flow [2024-06-27 16:44:39,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 39 transitions, 264 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-27 16:44:39,412 INFO L231 Difference]: Finished difference. Result has 34 places, 27 transitions, 139 flow [2024-06-27 16:44:39,412 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=139, PETRI_PLACES=34, PETRI_TRANSITIONS=27} [2024-06-27 16:44:39,414 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 13 predicate places. [2024-06-27 16:44:39,414 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 27 transitions, 139 flow [2024-06-27 16:44:39,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:44:39,415 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:44:39,415 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:44:39,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 16:44:39,415 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:44:39,416 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:44:39,416 INFO L85 PathProgramCache]: Analyzing trace with hash -1339064740, now seen corresponding path program 1 times [2024-06-27 16:44:39,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:44:39,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809669185] [2024-06-27 16:44:39,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:44:39,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:44:39,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:44:39,526 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 16:44:39,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:44:39,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809669185] [2024-06-27 16:44:39,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809669185] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:44:39,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259317751] [2024-06-27 16:44:39,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:44:39,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:44:39,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:44:39,533 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 16:44:39,537 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 16:44:39,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:44:39,654 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 6 conjunts are in the unsatisfiable core [2024-06-27 16:44:39,658 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:44:39,735 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 16:44:39,735 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:44:39,772 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:44:39,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259317751] provided 1 perfect and 1 imperfect interpolant sequences [2024-06-27 16:44:39,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-06-27 16:44:39,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2024-06-27 16:44:39,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211758107] [2024-06-27 16:44:39,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:44:39,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 16:44:39,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:44:39,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 16:44:39,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 16:44:39,775 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-06-27 16:44:39,776 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 27 transitions, 139 flow. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:44:39,776 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:44:39,776 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-06-27 16:44:39,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:44:39,839 INFO L124 PetriNetUnfolderBase]: 76/129 cut-off events. [2024-06-27 16:44:39,839 INFO L125 PetriNetUnfolderBase]: For 310/310 co-relation queries the response was YES. [2024-06-27 16:44:39,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 479 conditions, 129 events. 76/129 cut-off events. For 310/310 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 339 event pairs, 12 based on Foata normal form. 9/133 useless extension candidates. Maximal degree in co-relation 452. Up to 80 conditions per place. [2024-06-27 16:44:39,840 INFO L140 encePairwiseOnDemand]: 15/20 looper letters, 26 selfloop transitions, 6 changer transitions 0/35 dead transitions. [2024-06-27 16:44:39,841 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 35 transitions, 243 flow [2024-06-27 16:44:39,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 16:44:39,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 16:44:39,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 46 transitions. [2024-06-27 16:44:39,842 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46 [2024-06-27 16:44:39,842 INFO L175 Difference]: Start difference. First operand has 34 places, 27 transitions, 139 flow. Second operand 5 states and 46 transitions. [2024-06-27 16:44:39,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 35 transitions, 243 flow [2024-06-27 16:44:39,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 35 transitions, 201 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-27 16:44:39,845 INFO L231 Difference]: Finished difference. Result has 32 places, 29 transitions, 138 flow [2024-06-27 16:44:39,845 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=105, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=138, PETRI_PLACES=32, PETRI_TRANSITIONS=29} [2024-06-27 16:44:39,846 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 11 predicate places. [2024-06-27 16:44:39,846 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 29 transitions, 138 flow [2024-06-27 16:44:39,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:44:39,846 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:44:39,847 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:44:39,864 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 16:44:40,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:44:40,062 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:44:40,063 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:44:40,063 INFO L85 PathProgramCache]: Analyzing trace with hash -94130901, now seen corresponding path program 1 times [2024-06-27 16:44:40,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:44:40,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799620000] [2024-06-27 16:44:40,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:44:40,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:44:40,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:44:40,199 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 16:44:40,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:44:40,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799620000] [2024-06-27 16:44:40,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799620000] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:44:40,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761205609] [2024-06-27 16:44:40,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:44:40,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:44:40,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:44:40,205 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 16:44:40,208 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 16:44:40,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:44:40,290 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 6 conjunts are in the unsatisfiable core [2024-06-27 16:44:40,291 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:44:40,327 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 16:44:40,327 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:44:40,360 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:44:40,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761205609] provided 1 perfect and 1 imperfect interpolant sequences [2024-06-27 16:44:40,360 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-06-27 16:44:40,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2024-06-27 16:44:40,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692089139] [2024-06-27 16:44:40,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:44:40,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 16:44:40,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:44:40,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 16:44:40,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 16:44:40,362 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-06-27 16:44:40,363 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 29 transitions, 138 flow. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:44:40,363 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:44:40,363 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-06-27 16:44:40,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:44:40,434 INFO L124 PetriNetUnfolderBase]: 59/102 cut-off events. [2024-06-27 16:44:40,439 INFO L125 PetriNetUnfolderBase]: For 76/76 co-relation queries the response was YES. [2024-06-27 16:44:40,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 374 conditions, 102 events. 59/102 cut-off events. For 76/76 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 213 event pairs, 5 based on Foata normal form. 9/107 useless extension candidates. Maximal degree in co-relation 351. Up to 80 conditions per place. [2024-06-27 16:44:40,440 INFO L140 encePairwiseOnDemand]: 15/20 looper letters, 26 selfloop transitions, 6 changer transitions 0/35 dead transitions. [2024-06-27 16:44:40,440 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 35 transitions, 228 flow [2024-06-27 16:44:40,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 16:44:40,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 16:44:40,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 47 transitions. [2024-06-27 16:44:40,442 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47 [2024-06-27 16:44:40,442 INFO L175 Difference]: Start difference. First operand has 32 places, 29 transitions, 138 flow. Second operand 5 states and 47 transitions. [2024-06-27 16:44:40,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 35 transitions, 228 flow [2024-06-27 16:44:40,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 35 transitions, 225 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-27 16:44:40,444 INFO L231 Difference]: Finished difference. Result has 35 places, 30 transitions, 159 flow [2024-06-27 16:44:40,444 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=135, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=159, PETRI_PLACES=35, PETRI_TRANSITIONS=30} [2024-06-27 16:44:40,445 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 14 predicate places. [2024-06-27 16:44:40,445 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 30 transitions, 159 flow [2024-06-27 16:44:40,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:44:40,446 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:44:40,446 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:44:40,465 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 16:44:40,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:44:40,661 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:44:40,661 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:44:40,661 INFO L85 PathProgramCache]: Analyzing trace with hash 1914839235, now seen corresponding path program 1 times [2024-06-27 16:44:40,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:44:40,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034671940] [2024-06-27 16:44:40,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:44:40,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:44:40,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:44:41,440 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 16:44:41,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:44:41,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034671940] [2024-06-27 16:44:41,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034671940] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:44:41,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111717433] [2024-06-27 16:44:41,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:44:41,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:44:41,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:44:41,443 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 16:44:41,445 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 16:44:41,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:44:41,533 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 24 conjunts are in the unsatisfiable core [2024-06-27 16:44:41,537 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:44:41,575 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-06-27 16:44:41,788 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 49 [2024-06-27 16:44:41,822 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:44:41,822 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:44:42,739 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 16:44:42,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111717433] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:44:42,740 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:44:42,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 16 [2024-06-27 16:44:42,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550424915] [2024-06-27 16:44:42,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:44:42,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-06-27 16:44:42,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:44:42,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-06-27 16:44:42,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2024-06-27 16:44:42,743 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-06-27 16:44:42,743 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 30 transitions, 159 flow. Second operand has 16 states, 16 states have (on average 7.25) internal successors, (116), 16 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:44:42,743 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:44:42,744 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-06-27 16:44:42,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:44:42,946 INFO L124 PetriNetUnfolderBase]: 72/129 cut-off events. [2024-06-27 16:44:42,947 INFO L125 PetriNetUnfolderBase]: For 136/136 co-relation queries the response was YES. [2024-06-27 16:44:42,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 517 conditions, 129 events. 72/129 cut-off events. For 136/136 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 324 event pairs, 0 based on Foata normal form. 1/126 useless extension candidates. Maximal degree in co-relation 491. Up to 87 conditions per place. [2024-06-27 16:44:42,948 INFO L140 encePairwiseOnDemand]: 12/20 looper letters, 31 selfloop transitions, 17 changer transitions 3/54 dead transitions. [2024-06-27 16:44:42,948 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 54 transitions, 357 flow [2024-06-27 16:44:42,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 16:44:42,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 16:44:42,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 88 transitions. [2024-06-27 16:44:42,952 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4888888888888889 [2024-06-27 16:44:42,952 INFO L175 Difference]: Start difference. First operand has 35 places, 30 transitions, 159 flow. Second operand 9 states and 88 transitions. [2024-06-27 16:44:42,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 54 transitions, 357 flow [2024-06-27 16:44:42,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 54 transitions, 354 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-27 16:44:42,955 INFO L231 Difference]: Finished difference. Result has 45 places, 38 transitions, 275 flow [2024-06-27 16:44:42,955 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=275, PETRI_PLACES=45, PETRI_TRANSITIONS=38} [2024-06-27 16:44:42,958 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 24 predicate places. [2024-06-27 16:44:42,958 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 38 transitions, 275 flow [2024-06-27 16:44:42,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 7.25) internal successors, (116), 16 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:44:42,959 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:44:42,959 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:44:42,977 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 16:44:43,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:44:43,174 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:44:43,175 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:44:43,175 INFO L85 PathProgramCache]: Analyzing trace with hash -168671343, now seen corresponding path program 2 times [2024-06-27 16:44:43,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:44:43,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039131516] [2024-06-27 16:44:43,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:44:43,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:44:43,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:44:43,674 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 16:44:43,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:44:43,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039131516] [2024-06-27 16:44:43,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039131516] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:44:43,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131709733] [2024-06-27 16:44:43,676 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 16:44:43,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:44:43,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:44:43,677 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 16:44:43,690 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 16:44:43,771 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 16:44:43,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:44:43,773 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 27 conjunts are in the unsatisfiable core [2024-06-27 16:44:43,776 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:44:43,789 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-06-27 16:44:43,948 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 49 [2024-06-27 16:44:44,001 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:44:44,001 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:44:44,973 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 16:44:44,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131709733] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:44:44,974 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:44:44,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 17 [2024-06-27 16:44:44,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170420353] [2024-06-27 16:44:44,975 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:44:44,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-06-27 16:44:44,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:44:44,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-06-27 16:44:44,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2024-06-27 16:44:44,978 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-06-27 16:44:44,978 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 38 transitions, 275 flow. Second operand has 17 states, 17 states have (on average 7.117647058823529) internal successors, (121), 17 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:44:44,979 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:44:44,979 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-06-27 16:44:44,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:44:45,561 INFO L124 PetriNetUnfolderBase]: 104/179 cut-off events. [2024-06-27 16:44:45,561 INFO L125 PetriNetUnfolderBase]: For 379/379 co-relation queries the response was YES. [2024-06-27 16:44:45,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 890 conditions, 179 events. 104/179 cut-off events. For 379/379 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 502 event pairs, 2 based on Foata normal form. 1/176 useless extension candidates. Maximal degree in co-relation 858. Up to 115 conditions per place. [2024-06-27 16:44:45,564 INFO L140 encePairwiseOnDemand]: 12/20 looper letters, 32 selfloop transitions, 35 changer transitions 5/75 dead transitions. [2024-06-27 16:44:45,564 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 75 transitions, 632 flow [2024-06-27 16:44:45,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-06-27 16:44:45,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-06-27 16:44:45,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 148 transitions. [2024-06-27 16:44:45,567 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4625 [2024-06-27 16:44:45,567 INFO L175 Difference]: Start difference. First operand has 45 places, 38 transitions, 275 flow. Second operand 16 states and 148 transitions. [2024-06-27 16:44:45,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 75 transitions, 632 flow [2024-06-27 16:44:45,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 75 transitions, 583 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-27 16:44:45,572 INFO L231 Difference]: Finished difference. Result has 57 places, 55 transitions, 465 flow [2024-06-27 16:44:45,572 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=237, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=465, PETRI_PLACES=57, PETRI_TRANSITIONS=55} [2024-06-27 16:44:45,573 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 36 predicate places. [2024-06-27 16:44:45,573 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 55 transitions, 465 flow [2024-06-27 16:44:45,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 7.117647058823529) internal successors, (121), 17 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:44:45,573 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:44:45,574 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:44:45,591 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 16:44:45,788 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 16:44:45,788 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:44:45,789 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:44:45,789 INFO L85 PathProgramCache]: Analyzing trace with hash 1827560039, now seen corresponding path program 3 times [2024-06-27 16:44:45,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:44:45,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030130484] [2024-06-27 16:44:45,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:44:45,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:44:45,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:44:46,397 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:44:46,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:44:46,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030130484] [2024-06-27 16:44:46,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030130484] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:44:46,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421535492] [2024-06-27 16:44:46,399 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 16:44:46,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:44:46,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:44:46,400 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 16:44:46,403 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 16:44:46,483 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-06-27 16:44:46,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:44:46,485 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 24 conjunts are in the unsatisfiable core [2024-06-27 16:44:46,487 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:44:46,687 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 49 [2024-06-27 16:44:46,752 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:44:46,752 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:44:47,032 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:44:47,032 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 233 treesize of output 145 [2024-06-27 16:44:47,370 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 16:44:47,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421535492] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:44:47,370 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:44:47,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2024-06-27 16:44:47,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896560095] [2024-06-27 16:44:47,371 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:44:47,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-06-27 16:44:47,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:44:47,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-06-27 16:44:47,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2024-06-27 16:44:47,373 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-06-27 16:44:47,373 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 55 transitions, 465 flow. Second operand has 18 states, 18 states have (on average 7.111111111111111) internal successors, (128), 18 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:44:47,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:44:47,374 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-06-27 16:44:47,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:44:47,714 INFO L124 PetriNetUnfolderBase]: 125/216 cut-off events. [2024-06-27 16:44:47,715 INFO L125 PetriNetUnfolderBase]: For 446/446 co-relation queries the response was YES. [2024-06-27 16:44:47,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1120 conditions, 216 events. 125/216 cut-off events. For 446/446 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 669 event pairs, 0 based on Foata normal form. 1/213 useless extension candidates. Maximal degree in co-relation 1101. Up to 147 conditions per place. [2024-06-27 16:44:47,717 INFO L140 encePairwiseOnDemand]: 12/20 looper letters, 53 selfloop transitions, 26 changer transitions 4/86 dead transitions. [2024-06-27 16:44:47,718 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 86 transitions, 772 flow [2024-06-27 16:44:47,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-27 16:44:47,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-27 16:44:47,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 132 transitions. [2024-06-27 16:44:47,719 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4714285714285714 [2024-06-27 16:44:47,719 INFO L175 Difference]: Start difference. First operand has 57 places, 55 transitions, 465 flow. Second operand 14 states and 132 transitions. [2024-06-27 16:44:47,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 86 transitions, 772 flow [2024-06-27 16:44:47,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 86 transitions, 557 flow, removed 78 selfloop flow, removed 12 redundant places. [2024-06-27 16:44:47,724 INFO L231 Difference]: Finished difference. Result has 61 places, 62 transitions, 399 flow [2024-06-27 16:44:47,724 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=268, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=399, PETRI_PLACES=61, PETRI_TRANSITIONS=62} [2024-06-27 16:44:47,725 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 40 predicate places. [2024-06-27 16:44:47,725 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 62 transitions, 399 flow [2024-06-27 16:44:47,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 7.111111111111111) internal successors, (128), 18 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:44:47,726 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:44:47,726 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:44:47,743 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 16:44:47,940 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 16:44:47,940 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:44:47,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:44:47,941 INFO L85 PathProgramCache]: Analyzing trace with hash -1625165103, now seen corresponding path program 4 times [2024-06-27 16:44:47,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:44:47,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164387373] [2024-06-27 16:44:47,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:44:47,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:44:47,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:44:48,608 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:44:48,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:44:48,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164387373] [2024-06-27 16:44:48,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164387373] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:44:48,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530639034] [2024-06-27 16:44:48,609 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 16:44:48,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:44:48,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:44:48,611 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 16:44:48,632 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 16:44:48,699 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 16:44:48,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:44:48,701 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 18 conjunts are in the unsatisfiable core [2024-06-27 16:44:48,703 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:44:48,868 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 49 [2024-06-27 16:44:48,897 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 16:44:48,898 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:44:49,125 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:44:49,126 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 200 treesize of output 144 [2024-06-27 16:44:49,396 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 16:44:49,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530639034] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:44:49,397 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:44:49,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 16 [2024-06-27 16:44:49,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121977166] [2024-06-27 16:44:49,398 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:44:49,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-06-27 16:44:49,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:44:49,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-06-27 16:44:49,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2024-06-27 16:44:49,399 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-06-27 16:44:49,400 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 62 transitions, 399 flow. Second operand has 16 states, 16 states have (on average 7.0625) internal successors, (113), 16 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:44:49,400 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:44:49,400 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-06-27 16:44:49,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:44:49,678 INFO L124 PetriNetUnfolderBase]: 122/213 cut-off events. [2024-06-27 16:44:49,678 INFO L125 PetriNetUnfolderBase]: For 311/311 co-relation queries the response was YES. [2024-06-27 16:44:49,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 951 conditions, 213 events. 122/213 cut-off events. For 311/311 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 664 event pairs, 0 based on Foata normal form. 1/200 useless extension candidates. Maximal degree in co-relation 932. Up to 171 conditions per place. [2024-06-27 16:44:49,681 INFO L140 encePairwiseOnDemand]: 12/20 looper letters, 56 selfloop transitions, 18 changer transitions 3/80 dead transitions. [2024-06-27 16:44:49,681 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 80 transitions, 598 flow [2024-06-27 16:44:49,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 16:44:49,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 16:44:49,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 103 transitions. [2024-06-27 16:44:49,682 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4681818181818182 [2024-06-27 16:44:49,682 INFO L175 Difference]: Start difference. First operand has 61 places, 62 transitions, 399 flow. Second operand 11 states and 103 transitions. [2024-06-27 16:44:49,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 80 transitions, 598 flow [2024-06-27 16:44:49,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 80 transitions, 538 flow, removed 19 selfloop flow, removed 8 redundant places. [2024-06-27 16:44:49,687 INFO L231 Difference]: Finished difference. Result has 64 places, 63 transitions, 390 flow [2024-06-27 16:44:49,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=339, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=390, PETRI_PLACES=64, PETRI_TRANSITIONS=63} [2024-06-27 16:44:49,688 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 43 predicate places. [2024-06-27 16:44:49,688 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 63 transitions, 390 flow [2024-06-27 16:44:49,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 7.0625) internal successors, (113), 16 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:44:49,688 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:44:49,689 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:44:49,704 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 16:44:49,904 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 16:44:49,904 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:44:49,904 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:44:49,905 INFO L85 PathProgramCache]: Analyzing trace with hash 1825793813, now seen corresponding path program 5 times [2024-06-27 16:44:49,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:44:49,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816791230] [2024-06-27 16:44:49,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:44:49,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:44:49,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:44:50,528 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:44:50,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:44:50,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816791230] [2024-06-27 16:44:50,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816791230] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:44:50,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708638565] [2024-06-27 16:44:50,529 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-27 16:44:50,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:44:50,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:44:50,532 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 16:44:50,540 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 16:44:50,622 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 16:44:50,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:44:50,624 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 29 conjunts are in the unsatisfiable core [2024-06-27 16:44:50,626 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:44:50,646 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-06-27 16:44:50,807 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 49 [2024-06-27 16:44:50,873 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:44:50,874 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:44:51,621 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 16:44:51,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708638565] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:44:51,622 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:44:51,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2024-06-27 16:44:51,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462284077] [2024-06-27 16:44:51,622 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:44:51,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-06-27 16:44:51,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:44:51,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-06-27 16:44:51,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2024-06-27 16:44:51,624 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-06-27 16:44:51,624 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 63 transitions, 390 flow. Second operand has 18 states, 18 states have (on average 6.944444444444445) internal successors, (125), 18 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:44:51,624 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:44:51,625 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-06-27 16:44:51,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:44:52,183 INFO L124 PetriNetUnfolderBase]: 151/268 cut-off events. [2024-06-27 16:44:52,183 INFO L125 PetriNetUnfolderBase]: For 472/472 co-relation queries the response was YES. [2024-06-27 16:44:52,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1193 conditions, 268 events. 151/268 cut-off events. For 472/472 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 876 event pairs, 1 based on Foata normal form. 1/257 useless extension candidates. Maximal degree in co-relation 1138. Up to 175 conditions per place. [2024-06-27 16:44:52,186 INFO L140 encePairwiseOnDemand]: 12/20 looper letters, 56 selfloop transitions, 44 changer transitions 5/108 dead transitions. [2024-06-27 16:44:52,186 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 108 transitions, 846 flow [2024-06-27 16:44:52,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-06-27 16:44:52,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-06-27 16:44:52,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 157 transitions. [2024-06-27 16:44:52,194 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46176470588235297 [2024-06-27 16:44:52,194 INFO L175 Difference]: Start difference. First operand has 64 places, 63 transitions, 390 flow. Second operand 17 states and 157 transitions. [2024-06-27 16:44:52,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 108 transitions, 846 flow [2024-06-27 16:44:52,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 108 transitions, 790 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-27 16:44:52,208 INFO L231 Difference]: Finished difference. Result has 75 places, 82 transitions, 638 flow [2024-06-27 16:44:52,209 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=349, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=638, PETRI_PLACES=75, PETRI_TRANSITIONS=82} [2024-06-27 16:44:52,209 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 54 predicate places. [2024-06-27 16:44:52,209 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 82 transitions, 638 flow [2024-06-27 16:44:52,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 6.944444444444445) internal successors, (125), 18 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:44:52,210 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:44:52,210 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:44:52,225 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-06-27 16:44:52,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:44:52,417 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:44:52,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:44:52,417 INFO L85 PathProgramCache]: Analyzing trace with hash 843215203, now seen corresponding path program 6 times [2024-06-27 16:44:52,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:44:52,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174397995] [2024-06-27 16:44:52,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:44:52,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:44:52,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:44:52,942 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:44:52,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:44:52,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174397995] [2024-06-27 16:44:52,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174397995] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:44:52,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105578262] [2024-06-27 16:44:52,943 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-27 16:44:52,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:44:52,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:44:52,945 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 16:44:52,963 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 16:44:53,031 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-06-27 16:44:53,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:44:53,033 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 29 conjunts are in the unsatisfiable core [2024-06-27 16:44:53,039 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:44:53,053 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-06-27 16:44:53,243 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 49 [2024-06-27 16:44:53,308 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:44:53,309 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:44:54,119 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 16:44:54,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105578262] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:44:54,119 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:44:54,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 19 [2024-06-27 16:44:54,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574417538] [2024-06-27 16:44:54,120 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:44:54,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-06-27 16:44:54,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:44:54,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-06-27 16:44:54,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2024-06-27 16:44:54,122 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-06-27 16:44:54,122 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 82 transitions, 638 flow. Second operand has 19 states, 19 states have (on average 7.0) internal successors, (133), 19 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:44:54,122 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:44:54,122 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-06-27 16:44:54,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:44:54,692 INFO L124 PetriNetUnfolderBase]: 171/298 cut-off events. [2024-06-27 16:44:54,692 INFO L125 PetriNetUnfolderBase]: For 846/846 co-relation queries the response was YES. [2024-06-27 16:44:54,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1468 conditions, 298 events. 171/298 cut-off events. For 846/846 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 998 event pairs, 0 based on Foata normal form. 1/287 useless extension candidates. Maximal degree in co-relation 1439. Up to 189 conditions per place. [2024-06-27 16:44:54,696 INFO L140 encePairwiseOnDemand]: 12/20 looper letters, 70 selfloop transitions, 46 changer transitions 5/124 dead transitions. [2024-06-27 16:44:54,696 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 124 transitions, 1085 flow [2024-06-27 16:44:54,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-06-27 16:44:54,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-06-27 16:44:54,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 159 transitions. [2024-06-27 16:44:54,697 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.496875 [2024-06-27 16:44:54,697 INFO L175 Difference]: Start difference. First operand has 75 places, 82 transitions, 638 flow. Second operand 16 states and 159 transitions. [2024-06-27 16:44:54,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 124 transitions, 1085 flow [2024-06-27 16:44:54,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 124 transitions, 975 flow, removed 36 selfloop flow, removed 8 redundant places. [2024-06-27 16:44:54,705 INFO L231 Difference]: Finished difference. Result has 86 places, 92 transitions, 765 flow [2024-06-27 16:44:54,706 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=528, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=765, PETRI_PLACES=86, PETRI_TRANSITIONS=92} [2024-06-27 16:44:54,706 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 65 predicate places. [2024-06-27 16:44:54,706 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 92 transitions, 765 flow [2024-06-27 16:44:54,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 7.0) internal successors, (133), 19 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:44:54,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:44:54,707 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:44:54,724 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 16:44:54,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-06-27 16:44:54,922 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:44:54,922 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:44:54,922 INFO L85 PathProgramCache]: Analyzing trace with hash -769379544, now seen corresponding path program 7 times [2024-06-27 16:44:54,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:44:54,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408314742] [2024-06-27 16:44:54,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:44:54,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:44:54,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:44:55,021 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:44:55,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:44:55,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408314742] [2024-06-27 16:44:55,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408314742] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:44:55,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210072875] [2024-06-27 16:44:55,022 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-06-27 16:44:55,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:44:55,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:44:55,023 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 16:44:55,041 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 16:44:55,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:44:55,125 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 8 conjunts are in the unsatisfiable core [2024-06-27 16:44:55,127 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:44:55,194 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:44:55,194 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:44:55,241 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:44:55,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210072875] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:44:55,242 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:44:55,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2024-06-27 16:44:55,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433348183] [2024-06-27 16:44:55,243 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:44:55,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 16:44:55,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:44:55,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 16:44:55,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2024-06-27 16:44:55,246 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-06-27 16:44:55,248 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 92 transitions, 765 flow. Second operand has 12 states, 12 states have (on average 7.5) internal successors, (90), 12 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:44:55,248 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:44:55,249 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-06-27 16:44:55,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:44:55,395 INFO L124 PetriNetUnfolderBase]: 224/423 cut-off events. [2024-06-27 16:44:55,395 INFO L125 PetriNetUnfolderBase]: For 1845/1845 co-relation queries the response was YES. [2024-06-27 16:44:55,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2243 conditions, 423 events. 224/423 cut-off events. For 1845/1845 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 1798 event pairs, 62 based on Foata normal form. 27/445 useless extension candidates. Maximal degree in co-relation 2202. Up to 181 conditions per place. [2024-06-27 16:44:55,400 INFO L140 encePairwiseOnDemand]: 15/20 looper letters, 101 selfloop transitions, 19 changer transitions 6/129 dead transitions. [2024-06-27 16:44:55,400 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 129 transitions, 1364 flow [2024-06-27 16:44:55,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 16:44:55,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 16:44:55,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 72 transitions. [2024-06-27 16:44:55,401 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5142857142857142 [2024-06-27 16:44:55,401 INFO L175 Difference]: Start difference. First operand has 86 places, 92 transitions, 765 flow. Second operand 7 states and 72 transitions. [2024-06-27 16:44:55,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 129 transitions, 1364 flow [2024-06-27 16:44:55,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 129 transitions, 1176 flow, removed 53 selfloop flow, removed 15 redundant places. [2024-06-27 16:44:55,410 INFO L231 Difference]: Finished difference. Result has 76 places, 92 transitions, 767 flow [2024-06-27 16:44:55,410 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=575, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=767, PETRI_PLACES=76, PETRI_TRANSITIONS=92} [2024-06-27 16:44:55,411 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 55 predicate places. [2024-06-27 16:44:55,411 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 92 transitions, 767 flow [2024-06-27 16:44:55,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.5) internal successors, (90), 12 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:44:55,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:44:55,411 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:44:55,425 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 16:44:55,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:44:55,624 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:44:55,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:44:55,625 INFO L85 PathProgramCache]: Analyzing trace with hash -1983300111, now seen corresponding path program 8 times [2024-06-27 16:44:55,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:44:55,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265143916] [2024-06-27 16:44:55,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:44:55,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:44:55,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:44:55,711 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:44:55,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:44:55,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265143916] [2024-06-27 16:44:55,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265143916] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:44:55,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65368952] [2024-06-27 16:44:55,712 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 16:44:55,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:44:55,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:44:55,713 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 16:44:55,728 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 16:44:55,790 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 16:44:55,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:44:55,792 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 14 conjunts are in the unsatisfiable core [2024-06-27 16:44:55,793 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:44:55,860 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:44:55,860 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:44:55,926 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:44:55,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65368952] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:44:55,926 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:44:55,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 6] total 14 [2024-06-27 16:44:55,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661396992] [2024-06-27 16:44:55,927 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:44:55,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-27 16:44:55,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:44:55,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-27 16:44:55,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2024-06-27 16:44:55,931 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-06-27 16:44:55,931 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 92 transitions, 767 flow. Second operand has 14 states, 14 states have (on average 7.642857142857143) internal successors, (107), 14 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:44:55,931 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:44:55,931 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-06-27 16:44:55,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:44:56,169 INFO L124 PetriNetUnfolderBase]: 164/313 cut-off events. [2024-06-27 16:44:56,169 INFO L125 PetriNetUnfolderBase]: For 1174/1174 co-relation queries the response was YES. [2024-06-27 16:44:56,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1602 conditions, 313 events. 164/313 cut-off events. For 1174/1174 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1184 event pairs, 3 based on Foata normal form. 19/328 useless extension candidates. Maximal degree in co-relation 1432. Up to 124 conditions per place. [2024-06-27 16:44:56,172 INFO L140 encePairwiseOnDemand]: 13/20 looper letters, 75 selfloop transitions, 27 changer transitions 21/126 dead transitions. [2024-06-27 16:44:56,172 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 126 transitions, 1164 flow [2024-06-27 16:44:56,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-27 16:44:56,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-27 16:44:56,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 139 transitions. [2024-06-27 16:44:56,174 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49642857142857144 [2024-06-27 16:44:56,174 INFO L175 Difference]: Start difference. First operand has 76 places, 92 transitions, 767 flow. Second operand 14 states and 139 transitions. [2024-06-27 16:44:56,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 126 transitions, 1164 flow [2024-06-27 16:44:56,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 126 transitions, 1141 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-06-27 16:44:56,185 INFO L231 Difference]: Finished difference. Result has 91 places, 84 transitions, 747 flow [2024-06-27 16:44:56,185 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=663, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=747, PETRI_PLACES=91, PETRI_TRANSITIONS=84} [2024-06-27 16:44:56,186 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 70 predicate places. [2024-06-27 16:44:56,186 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 84 transitions, 747 flow [2024-06-27 16:44:56,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.642857142857143) internal successors, (107), 14 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:44:56,187 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:44:56,187 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:44:56,204 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-06-27 16:44:56,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-06-27 16:44:56,400 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:44:56,401 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:44:56,401 INFO L85 PathProgramCache]: Analyzing trace with hash 460599964, now seen corresponding path program 9 times [2024-06-27 16:44:56,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:44:56,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830646303] [2024-06-27 16:44:56,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:44:56,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:44:56,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:44:56,510 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:44:56,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:44:56,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830646303] [2024-06-27 16:44:56,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830646303] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:44:56,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047392775] [2024-06-27 16:44:56,513 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 16:44:56,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:44:56,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:44:56,516 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 16:44:56,537 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 16:44:56,602 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-06-27 16:44:56,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:44:56,603 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 8 conjunts are in the unsatisfiable core [2024-06-27 16:44:56,605 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:44:56,666 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:44:56,667 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:44:56,735 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:44:56,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047392775] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:44:56,736 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:44:56,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-06-27 16:44:56,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475897925] [2024-06-27 16:44:56,736 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:44:56,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 16:44:56,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:44:56,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 16:44:56,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2024-06-27 16:44:56,739 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-06-27 16:44:56,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 84 transitions, 747 flow. Second operand has 13 states, 13 states have (on average 7.153846153846154) internal successors, (93), 13 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:44:56,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:44:56,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-06-27 16:44:56,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:44:56,871 INFO L124 PetriNetUnfolderBase]: 144/253 cut-off events. [2024-06-27 16:44:56,872 INFO L125 PetriNetUnfolderBase]: For 1297/1297 co-relation queries the response was YES. [2024-06-27 16:44:56,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1464 conditions, 253 events. 144/253 cut-off events. For 1297/1297 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 804 event pairs, 10 based on Foata normal form. 18/261 useless extension candidates. Maximal degree in co-relation 1419. Up to 161 conditions per place. [2024-06-27 16:44:56,875 INFO L140 encePairwiseOnDemand]: 15/20 looper letters, 66 selfloop transitions, 23 changer transitions 0/92 dead transitions. [2024-06-27 16:44:56,875 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 92 transitions, 1012 flow [2024-06-27 16:44:56,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 16:44:56,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 16:44:56,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 69 transitions. [2024-06-27 16:44:56,876 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43125 [2024-06-27 16:44:56,876 INFO L175 Difference]: Start difference. First operand has 91 places, 84 transitions, 747 flow. Second operand 8 states and 69 transitions. [2024-06-27 16:44:56,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 92 transitions, 1012 flow [2024-06-27 16:44:56,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 92 transitions, 886 flow, removed 39 selfloop flow, removed 13 redundant places. [2024-06-27 16:44:56,884 INFO L231 Difference]: Finished difference. Result has 75 places, 80 transitions, 692 flow [2024-06-27 16:44:56,884 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=575, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=692, PETRI_PLACES=75, PETRI_TRANSITIONS=80} [2024-06-27 16:44:56,885 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 54 predicate places. [2024-06-27 16:44:56,885 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 80 transitions, 692 flow [2024-06-27 16:44:56,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.153846153846154) internal successors, (93), 13 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:44:56,885 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:44:56,885 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:44:56,903 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 16:44:57,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-06-27 16:44:57,100 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:44:57,100 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:44:57,100 INFO L85 PathProgramCache]: Analyzing trace with hash 456587555, now seen corresponding path program 10 times [2024-06-27 16:44:57,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:44:57,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705576693] [2024-06-27 16:44:57,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:44:57,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:44:57,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:44:57,202 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:44:57,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:44:57,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705576693] [2024-06-27 16:44:57,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705576693] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:44:57,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031355638] [2024-06-27 16:44:57,203 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 16:44:57,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:44:57,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:44:57,205 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 16:44:57,228 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 16:44:57,296 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 16:44:57,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:44:57,298 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 8 conjunts are in the unsatisfiable core [2024-06-27 16:44:57,303 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:44:57,360 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:44:57,360 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:44:57,413 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:44:57,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031355638] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:44:57,413 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:44:57,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-06-27 16:44:57,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443629290] [2024-06-27 16:44:57,414 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:44:57,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 16:44:57,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:44:57,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 16:44:57,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2024-06-27 16:44:57,415 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-06-27 16:44:57,415 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 80 transitions, 692 flow. Second operand has 13 states, 13 states have (on average 7.384615384615385) internal successors, (96), 13 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:44:57,416 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:44:57,416 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-06-27 16:44:57,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:44:57,524 INFO L124 PetriNetUnfolderBase]: 146/258 cut-off events. [2024-06-27 16:44:57,524 INFO L125 PetriNetUnfolderBase]: For 1297/1297 co-relation queries the response was YES. [2024-06-27 16:44:57,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1431 conditions, 258 events. 146/258 cut-off events. For 1297/1297 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 809 event pairs, 18 based on Foata normal form. 15/264 useless extension candidates. Maximal degree in co-relation 1392. Up to 141 conditions per place. [2024-06-27 16:44:57,527 INFO L140 encePairwiseOnDemand]: 15/20 looper letters, 61 selfloop transitions, 20 changer transitions 0/84 dead transitions. [2024-06-27 16:44:57,527 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 84 transitions, 880 flow [2024-06-27 16:44:57,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 16:44:57,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 16:44:57,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 67 transitions. [2024-06-27 16:44:57,528 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41875 [2024-06-27 16:44:57,528 INFO L175 Difference]: Start difference. First operand has 75 places, 80 transitions, 692 flow. Second operand 8 states and 67 transitions. [2024-06-27 16:44:57,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 84 transitions, 880 flow [2024-06-27 16:44:57,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 84 transitions, 841 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-27 16:44:57,533 INFO L231 Difference]: Finished difference. Result has 73 places, 75 transitions, 672 flow [2024-06-27 16:44:57,533 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=580, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=672, PETRI_PLACES=73, PETRI_TRANSITIONS=75} [2024-06-27 16:44:57,533 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 52 predicate places. [2024-06-27 16:44:57,534 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 75 transitions, 672 flow [2024-06-27 16:44:57,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.384615384615385) internal successors, (96), 13 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:44:57,534 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:44:57,534 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:44:57,554 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 16:44:57,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-06-27 16:44:57,749 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:44:57,749 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:44:57,749 INFO L85 PathProgramCache]: Analyzing trace with hash -353031292, now seen corresponding path program 11 times [2024-06-27 16:44:57,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:44:57,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575209814] [2024-06-27 16:44:57,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:44:57,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:44:57,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:44:59,791 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:44:59,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:44:59,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575209814] [2024-06-27 16:44:59,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575209814] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:44:59,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53301042] [2024-06-27 16:44:59,792 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-27 16:44:59,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:44:59,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:44:59,796 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 16:44:59,817 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 16:44:59,900 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 16:44:59,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:44:59,902 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 28 conjunts are in the unsatisfiable core [2024-06-27 16:44:59,905 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:45:00,938 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:45:00,939 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 281 treesize of output 257 [2024-06-27 16:45:03,635 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:45:03,635 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:45:05,559 INFO L349 Elim1Store]: treesize reduction 18, result has 60.0 percent of original size [2024-06-27 16:45:05,559 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 954 treesize of output 416 [2024-06-27 16:45:09,043 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:45:09,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53301042] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:45:09,043 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:45:09,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 9] total 25 [2024-06-27 16:45:09,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843553271] [2024-06-27 16:45:09,044 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:45:09,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-06-27 16:45:09,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:45:09,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-06-27 16:45:09,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2024-06-27 16:45:09,045 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-06-27 16:45:09,046 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 75 transitions, 672 flow. Second operand has 25 states, 25 states have (on average 6.8) internal successors, (170), 25 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:45:09,046 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:45:09,046 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-06-27 16:45:09,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:45:11,271 INFO L124 PetriNetUnfolderBase]: 178/318 cut-off events. [2024-06-27 16:45:11,271 INFO L125 PetriNetUnfolderBase]: For 1741/1741 co-relation queries the response was YES. [2024-06-27 16:45:11,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1911 conditions, 318 events. 178/318 cut-off events. For 1741/1741 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1103 event pairs, 2 based on Foata normal form. 1/317 useless extension candidates. Maximal degree in co-relation 1872. Up to 187 conditions per place. [2024-06-27 16:45:11,274 INFO L140 encePairwiseOnDemand]: 12/20 looper letters, 82 selfloop transitions, 40 changer transitions 5/130 dead transitions. [2024-06-27 16:45:11,274 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 130 transitions, 1271 flow [2024-06-27 16:45:11,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-06-27 16:45:11,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-06-27 16:45:11,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 199 transitions. [2024-06-27 16:45:11,276 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45227272727272727 [2024-06-27 16:45:11,276 INFO L175 Difference]: Start difference. First operand has 73 places, 75 transitions, 672 flow. Second operand 22 states and 199 transitions. [2024-06-27 16:45:11,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 130 transitions, 1271 flow [2024-06-27 16:45:11,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 130 transitions, 1204 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-27 16:45:11,283 INFO L231 Difference]: Finished difference. Result has 95 places, 89 transitions, 936 flow [2024-06-27 16:45:11,283 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=641, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=936, PETRI_PLACES=95, PETRI_TRANSITIONS=89} [2024-06-27 16:45:11,283 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 74 predicate places. [2024-06-27 16:45:11,284 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 89 transitions, 936 flow [2024-06-27 16:45:11,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 6.8) internal successors, (170), 25 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:45:11,284 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:45:11,284 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:45:11,298 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 16:45:11,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-06-27 16:45:11,498 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:45:11,499 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:45:11,499 INFO L85 PathProgramCache]: Analyzing trace with hash -834308218, now seen corresponding path program 12 times [2024-06-27 16:45:11,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:45:11,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076432765] [2024-06-27 16:45:11,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:45:11,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:45:11,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:45:13,832 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:45:13,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:45:13,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076432765] [2024-06-27 16:45:13,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076432765] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:45:13,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337816100] [2024-06-27 16:45:13,833 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-27 16:45:13,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:45:13,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:45:13,834 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 16:45:13,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-06-27 16:45:13,946 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-06-27 16:45:13,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:45:13,948 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 33 conjunts are in the unsatisfiable core [2024-06-27 16:45:13,950 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:45:14,588 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:45:14,588 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 196 treesize of output 140 [2024-06-27 16:45:14,708 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:45:14,708 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:45:15,818 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:45:15,819 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 966 treesize of output 426 [2024-06-27 16:45:24,795 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:45:24,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1337816100] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:45:24,795 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:45:24,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 24 [2024-06-27 16:45:24,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939814734] [2024-06-27 16:45:24,796 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:45:24,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-06-27 16:45:24,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:45:24,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-06-27 16:45:24,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2024-06-27 16:45:24,797 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-06-27 16:45:24,797 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 89 transitions, 936 flow. Second operand has 24 states, 24 states have (on average 6.708333333333333) internal successors, (161), 24 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:45:24,797 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:45:24,797 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-06-27 16:45:24,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:45:25,820 INFO L124 PetriNetUnfolderBase]: 224/396 cut-off events. [2024-06-27 16:45:25,820 INFO L125 PetriNetUnfolderBase]: For 2400/2400 co-relation queries the response was YES. [2024-06-27 16:45:25,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2613 conditions, 396 events. 224/396 cut-off events. For 2400/2400 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 1491 event pairs, 3 based on Foata normal form. 1/395 useless extension candidates. Maximal degree in co-relation 2577. Up to 265 conditions per place. [2024-06-27 16:45:25,825 INFO L140 encePairwiseOnDemand]: 12/20 looper letters, 86 selfloop transitions, 60 changer transitions 5/154 dead transitions. [2024-06-27 16:45:25,825 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 154 transitions, 1757 flow [2024-06-27 16:45:25,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-06-27 16:45:25,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-06-27 16:45:25,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 214 transitions. [2024-06-27 16:45:25,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4652173913043478 [2024-06-27 16:45:25,827 INFO L175 Difference]: Start difference. First operand has 95 places, 89 transitions, 936 flow. Second operand 23 states and 214 transitions. [2024-06-27 16:45:25,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 154 transitions, 1757 flow [2024-06-27 16:45:25,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 154 transitions, 1580 flow, removed 70 selfloop flow, removed 13 redundant places. [2024-06-27 16:45:25,844 INFO L231 Difference]: Finished difference. Result has 111 places, 114 transitions, 1341 flow [2024-06-27 16:45:25,845 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=795, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=1341, PETRI_PLACES=111, PETRI_TRANSITIONS=114} [2024-06-27 16:45:25,845 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 90 predicate places. [2024-06-27 16:45:25,845 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 114 transitions, 1341 flow [2024-06-27 16:45:25,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 6.708333333333333) internal successors, (161), 24 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:45:25,846 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:45:25,846 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:45:25,863 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-06-27 16:45:26,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:45:26,060 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:45:26,061 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:45:26,061 INFO L85 PathProgramCache]: Analyzing trace with hash -1693777394, now seen corresponding path program 13 times [2024-06-27 16:45:26,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:45:26,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663990691] [2024-06-27 16:45:26,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:45:26,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:45:26,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:45:27,633 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:45:27,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:45:27,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663990691] [2024-06-27 16:45:27,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663990691] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:45:27,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577864998] [2024-06-27 16:45:27,634 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-06-27 16:45:27,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:45:27,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:45:27,636 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 16:45:27,660 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 16:45:27,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:45:27,745 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 31 conjunts are in the unsatisfiable core [2024-06-27 16:45:27,747 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:45:28,296 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:45:28,296 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 223 treesize of output 145 [2024-06-27 16:45:28,575 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:45:28,575 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:45:29,558 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:45:29,559 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 966 treesize of output 426 [2024-06-27 16:45:37,395 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:45:37,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577864998] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:45:37,396 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:45:37,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 27 [2024-06-27 16:45:37,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097803940] [2024-06-27 16:45:37,397 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:45:37,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-06-27 16:45:37,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:45:37,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-06-27 16:45:37,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=612, Unknown=0, NotChecked=0, Total=702 [2024-06-27 16:45:37,398 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-06-27 16:45:37,399 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 114 transitions, 1341 flow. Second operand has 27 states, 27 states have (on average 6.62962962962963) internal successors, (179), 27 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:45:37,399 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:45:37,399 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-06-27 16:45:37,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:45:38,857 INFO L124 PetriNetUnfolderBase]: 283/498 cut-off events. [2024-06-27 16:45:38,857 INFO L125 PetriNetUnfolderBase]: For 3258/3258 co-relation queries the response was YES. [2024-06-27 16:45:38,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3384 conditions, 498 events. 283/498 cut-off events. For 3258/3258 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 1979 event pairs, 4 based on Foata normal form. 1/497 useless extension candidates. Maximal degree in co-relation 3341. Up to 319 conditions per place. [2024-06-27 16:45:38,862 INFO L140 encePairwiseOnDemand]: 12/20 looper letters, 115 selfloop transitions, 74 changer transitions 5/197 dead transitions. [2024-06-27 16:45:38,862 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 197 transitions, 2358 flow [2024-06-27 16:45:38,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-06-27 16:45:38,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-06-27 16:45:38,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 259 transitions. [2024-06-27 16:45:38,865 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47962962962962963 [2024-06-27 16:45:38,866 INFO L175 Difference]: Start difference. First operand has 111 places, 114 transitions, 1341 flow. Second operand 27 states and 259 transitions. [2024-06-27 16:45:38,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 197 transitions, 2358 flow [2024-06-27 16:45:38,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 197 transitions, 2081 flow, removed 113 selfloop flow, removed 12 redundant places. [2024-06-27 16:45:38,885 INFO L231 Difference]: Finished difference. Result has 128 places, 144 transitions, 1712 flow [2024-06-27 16:45:38,885 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=1108, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=1712, PETRI_PLACES=128, PETRI_TRANSITIONS=144} [2024-06-27 16:45:38,885 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 107 predicate places. [2024-06-27 16:45:38,886 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 144 transitions, 1712 flow [2024-06-27 16:45:38,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 6.62962962962963) internal successors, (179), 27 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:45:38,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:45:38,886 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:45:38,906 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-06-27 16:45:39,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-06-27 16:45:39,107 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:45:39,107 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:45:39,107 INFO L85 PathProgramCache]: Analyzing trace with hash -1728974456, now seen corresponding path program 14 times [2024-06-27 16:45:39,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:45:39,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014342260] [2024-06-27 16:45:39,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:45:39,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:45:39,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:45:40,380 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:45:40,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:45:40,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014342260] [2024-06-27 16:45:40,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014342260] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:45:40,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884152538] [2024-06-27 16:45:40,381 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 16:45:40,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:45:40,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:45:40,382 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 16:45:40,383 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 16:45:40,484 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 16:45:40,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:45:40,485 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 44 conjunts are in the unsatisfiable core [2024-06-27 16:45:40,487 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:45:40,508 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-06-27 16:45:40,529 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-06-27 16:45:41,243 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:45:41,244 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 250 treesize of output 256 [2024-06-27 16:45:47,019 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:45:47,019 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:45:54,494 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 237 treesize of output 217 [2024-06-27 16:45:54,520 INFO L349 Elim1Store]: treesize reduction 5, result has 70.6 percent of original size [2024-06-27 16:45:54,521 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1223 treesize of output 1106 [2024-06-27 16:45:56,439 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 189 treesize of output 173 [2024-06-27 16:45:56,454 INFO L349 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2024-06-27 16:45:56,454 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 3486 treesize of output 1 [2024-06-27 16:45:56,458 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 146 treesize of output 134 [2024-06-27 16:45:56,468 INFO L349 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2024-06-27 16:45:56,469 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1929 treesize of output 1 [2024-06-27 16:45:56,472 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 86 [2024-06-27 16:45:56,479 INFO L349 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2024-06-27 16:45:56,480 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 484 treesize of output 1 [2024-06-27 16:45:56,483 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 110 [2024-06-27 16:45:56,491 INFO L349 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2024-06-27 16:45:56,492 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 799 treesize of output 1 [2024-06-27 16:45:56,495 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 288 treesize of output 264 [2024-06-27 16:45:56,507 INFO L349 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2024-06-27 16:45:56,507 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1540 treesize of output 1 [2024-06-27 16:45:56,511 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 123 treesize of output 113 [2024-06-27 16:45:56,520 INFO L349 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2024-06-27 16:45:56,520 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 829 treesize of output 1 [2024-06-27 16:45:56,570 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:45:56,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884152538] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:45:56,571 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:45:56,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2024-06-27 16:45:56,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259239652] [2024-06-27 16:45:56,571 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:45:56,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-06-27 16:45:56,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:45:56,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-06-27 16:45:56,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=759, Unknown=0, NotChecked=0, Total=870 [2024-06-27 16:45:56,573 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-06-27 16:45:56,573 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 144 transitions, 1712 flow. Second operand has 30 states, 30 states have (on average 6.5) internal successors, (195), 30 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:45:56,574 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:45:56,574 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-06-27 16:45:56,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:46:02,357 INFO L124 PetriNetUnfolderBase]: 296/525 cut-off events. [2024-06-27 16:46:02,357 INFO L125 PetriNetUnfolderBase]: For 3366/3366 co-relation queries the response was YES. [2024-06-27 16:46:02,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3481 conditions, 525 events. 296/525 cut-off events. For 3366/3366 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 2158 event pairs, 6 based on Foata normal form. 1/522 useless extension candidates. Maximal degree in co-relation 3434. Up to 356 conditions per place. [2024-06-27 16:46:02,363 INFO L140 encePairwiseOnDemand]: 12/20 looper letters, 115 selfloop transitions, 72 changer transitions 4/194 dead transitions. [2024-06-27 16:46:02,363 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 194 transitions, 2357 flow [2024-06-27 16:46:02,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-06-27 16:46:02,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-06-27 16:46:02,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 229 transitions. [2024-06-27 16:46:02,364 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4403846153846154 [2024-06-27 16:46:02,364 INFO L175 Difference]: Start difference. First operand has 128 places, 144 transitions, 1712 flow. Second operand 26 states and 229 transitions. [2024-06-27 16:46:02,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 194 transitions, 2357 flow [2024-06-27 16:46:02,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 194 transitions, 2126 flow, removed 85 selfloop flow, removed 14 redundant places. [2024-06-27 16:46:02,384 INFO L231 Difference]: Finished difference. Result has 144 places, 157 transitions, 1857 flow [2024-06-27 16:46:02,384 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=1483, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=1857, PETRI_PLACES=144, PETRI_TRANSITIONS=157} [2024-06-27 16:46:02,384 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 123 predicate places. [2024-06-27 16:46:02,384 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 157 transitions, 1857 flow [2024-06-27 16:46:02,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 6.5) internal successors, (195), 30 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:46:02,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:46:02,385 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:46:02,401 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 16:46:02,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:46:02,596 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:46:02,597 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:46:02,597 INFO L85 PathProgramCache]: Analyzing trace with hash 422223724, now seen corresponding path program 15 times [2024-06-27 16:46:02,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:46:02,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572925297] [2024-06-27 16:46:02,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:46:02,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:46:02,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:46:03,850 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:46:03,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:46:03,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572925297] [2024-06-27 16:46:03,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572925297] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:46:03,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649150117] [2024-06-27 16:46:03,851 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 16:46:03,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:46:03,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:46:03,852 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 16:46:03,852 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 16:46:03,954 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-06-27 16:46:03,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:46:03,955 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 42 conjunts are in the unsatisfiable core [2024-06-27 16:46:03,957 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:46:03,989 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-06-27 16:46:04,703 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:46:04,703 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 278 treesize of output 262 [2024-06-27 16:46:09,430 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:46:09,430 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:46:13,943 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 175 treesize of output 153 [2024-06-27 16:46:13,960 INFO L349 Elim1Store]: treesize reduction 5, result has 70.6 percent of original size [2024-06-27 16:46:13,960 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 365 treesize of output 290 [2024-06-27 16:46:15,000 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:46:15,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649150117] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:46:15,000 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:46:15,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2024-06-27 16:46:15,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978714186] [2024-06-27 16:46:15,000 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:46:15,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-06-27 16:46:15,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:46:15,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-06-27 16:46:15,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=753, Unknown=0, NotChecked=0, Total=870 [2024-06-27 16:46:15,002 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-06-27 16:46:15,002 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 157 transitions, 1857 flow. Second operand has 30 states, 30 states have (on average 6.5) internal successors, (195), 30 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:46:15,002 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:46:15,003 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-06-27 16:46:15,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:46:17,097 INFO L124 PetriNetUnfolderBase]: 563/986 cut-off events. [2024-06-27 16:46:17,097 INFO L125 PetriNetUnfolderBase]: For 7249/7249 co-relation queries the response was YES. [2024-06-27 16:46:17,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6838 conditions, 986 events. 563/986 cut-off events. For 7249/7249 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 4817 event pairs, 13 based on Foata normal form. 2/978 useless extension candidates. Maximal degree in co-relation 6779. Up to 428 conditions per place. [2024-06-27 16:46:17,109 INFO L140 encePairwiseOnDemand]: 12/20 looper letters, 260 selfloop transitions, 82 changer transitions 8/353 dead transitions. [2024-06-27 16:46:17,110 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 353 transitions, 4555 flow [2024-06-27 16:46:17,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-06-27 16:46:17,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2024-06-27 16:46:17,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 321 transitions. [2024-06-27 16:46:17,113 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47205882352941175 [2024-06-27 16:46:17,113 INFO L175 Difference]: Start difference. First operand has 144 places, 157 transitions, 1857 flow. Second operand 34 states and 321 transitions. [2024-06-27 16:46:17,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 353 transitions, 4555 flow [2024-06-27 16:46:17,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 353 transitions, 4358 flow, removed 55 selfloop flow, removed 18 redundant places. [2024-06-27 16:46:17,148 INFO L231 Difference]: Finished difference. Result has 167 places, 204 transitions, 2777 flow [2024-06-27 16:46:17,149 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=1743, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=2777, PETRI_PLACES=167, PETRI_TRANSITIONS=204} [2024-06-27 16:46:17,149 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 146 predicate places. [2024-06-27 16:46:17,149 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 204 transitions, 2777 flow [2024-06-27 16:46:17,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 6.5) internal successors, (195), 30 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:46:17,150 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:46:17,150 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:46:17,163 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 16:46:17,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:46:17,359 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:46:17,359 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:46:17,359 INFO L85 PathProgramCache]: Analyzing trace with hash -2143696238, now seen corresponding path program 16 times [2024-06-27 16:46:17,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:46:17,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169322713] [2024-06-27 16:46:17,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:46:17,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:46:17,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:46:19,265 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:46:19,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:46:19,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169322713] [2024-06-27 16:46:19,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169322713] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:46:19,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942654582] [2024-06-27 16:46:19,266 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 16:46:19,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:46:19,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:46:19,267 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 16:46:19,268 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 16:46:19,368 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 16:46:19,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:46:19,369 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 26 conjunts are in the unsatisfiable core [2024-06-27 16:46:19,371 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:46:19,800 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:46:19,800 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 204 treesize of output 144 [2024-06-27 16:46:20,006 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:46:20,006 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:46:20,998 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:46:20,999 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 997 treesize of output 437 [2024-06-27 16:46:30,183 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:46:30,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942654582] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:46:30,183 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:46:30,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 9] total 24 [2024-06-27 16:46:30,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593996102] [2024-06-27 16:46:30,184 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:46:30,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-06-27 16:46:30,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:46:30,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-06-27 16:46:30,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2024-06-27 16:46:30,185 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-06-27 16:46:30,185 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 204 transitions, 2777 flow. Second operand has 24 states, 24 states have (on average 6.75) internal successors, (162), 24 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:46:30,185 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:46:30,185 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-06-27 16:46:30,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:46:31,322 INFO L124 PetriNetUnfolderBase]: 620/1069 cut-off events. [2024-06-27 16:46:31,323 INFO L125 PetriNetUnfolderBase]: For 10120/10120 co-relation queries the response was YES. [2024-06-27 16:46:31,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8083 conditions, 1069 events. 620/1069 cut-off events. For 10120/10120 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 5183 event pairs, 20 based on Foata normal form. 2/1059 useless extension candidates. Maximal degree in co-relation 8014. Up to 915 conditions per place. [2024-06-27 16:46:31,336 INFO L140 encePairwiseOnDemand]: 12/20 looper letters, 162 selfloop transitions, 87 changer transitions 7/259 dead transitions. [2024-06-27 16:46:31,336 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 259 transitions, 4135 flow [2024-06-27 16:46:31,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-06-27 16:46:31,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-06-27 16:46:31,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 179 transitions. [2024-06-27 16:46:31,338 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4475 [2024-06-27 16:46:31,338 INFO L175 Difference]: Start difference. First operand has 167 places, 204 transitions, 2777 flow. Second operand 20 states and 179 transitions. [2024-06-27 16:46:31,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 259 transitions, 4135 flow [2024-06-27 16:46:31,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 259 transitions, 3763 flow, removed 146 selfloop flow, removed 20 redundant places. [2024-06-27 16:46:31,385 INFO L231 Difference]: Finished difference. Result has 167 places, 232 transitions, 3310 flow [2024-06-27 16:46:31,385 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=2425, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=3310, PETRI_PLACES=167, PETRI_TRANSITIONS=232} [2024-06-27 16:46:31,385 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 146 predicate places. [2024-06-27 16:46:31,386 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 232 transitions, 3310 flow [2024-06-27 16:46:31,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 6.75) internal successors, (162), 24 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:46:31,386 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:46:31,386 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:46:31,401 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 16:46:31,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:46:31,601 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:46:31,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:46:31,601 INFO L85 PathProgramCache]: Analyzing trace with hash 387026662, now seen corresponding path program 17 times [2024-06-27 16:46:31,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:46:31,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809277015] [2024-06-27 16:46:31,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:46:31,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:46:31,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:46:34,474 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:46:34,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:46:34,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809277015] [2024-06-27 16:46:34,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809277015] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:46:34,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792851171] [2024-06-27 16:46:34,474 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-27 16:46:34,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:46:34,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:46:34,481 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 16:46:34,484 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 16:46:34,666 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-06-27 16:46:34,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:46:34,668 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 32 conjunts are in the unsatisfiable core [2024-06-27 16:46:34,669 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:46:34,689 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2024-06-27 16:46:35,100 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:46:35,100 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 231 treesize of output 145 [2024-06-27 16:46:35,263 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:46:35,263 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:46:39,554 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:46:39,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792851171] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:46:39,554 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:46:39,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 24 [2024-06-27 16:46:39,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081175262] [2024-06-27 16:46:39,555 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:46:39,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-06-27 16:46:39,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:46:39,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-06-27 16:46:39,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2024-06-27 16:46:39,556 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-06-27 16:46:39,556 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 232 transitions, 3310 flow. Second operand has 24 states, 24 states have (on average 6.75) internal successors, (162), 24 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:46:39,556 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:46:39,556 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-06-27 16:46:39,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:46:40,378 INFO L124 PetriNetUnfolderBase]: 648/1113 cut-off events. [2024-06-27 16:46:40,378 INFO L125 PetriNetUnfolderBase]: For 10394/10394 co-relation queries the response was YES. [2024-06-27 16:46:40,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8509 conditions, 1113 events. 648/1113 cut-off events. For 10394/10394 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 5430 event pairs, 20 based on Foata normal form. 2/1101 useless extension candidates. Maximal degree in co-relation 8441. Up to 997 conditions per place. [2024-06-27 16:46:40,393 INFO L140 encePairwiseOnDemand]: 12/20 looper letters, 198 selfloop transitions, 64 changer transitions 5/270 dead transitions. [2024-06-27 16:46:40,393 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 270 transitions, 4328 flow [2024-06-27 16:46:40,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-06-27 16:46:40,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-06-27 16:46:40,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 168 transitions. [2024-06-27 16:46:40,395 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4421052631578947 [2024-06-27 16:46:40,395 INFO L175 Difference]: Start difference. First operand has 167 places, 232 transitions, 3310 flow. Second operand 19 states and 168 transitions. [2024-06-27 16:46:40,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 270 transitions, 4328 flow [2024-06-27 16:46:40,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 270 transitions, 3711 flow, removed 256 selfloop flow, removed 14 redundant places. [2024-06-27 16:46:40,449 INFO L231 Difference]: Finished difference. Result has 173 places, 248 transitions, 3257 flow [2024-06-27 16:46:40,450 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=2693, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=3257, PETRI_PLACES=173, PETRI_TRANSITIONS=248} [2024-06-27 16:46:40,450 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 152 predicate places. [2024-06-27 16:46:40,450 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 248 transitions, 3257 flow [2024-06-27 16:46:40,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 6.75) internal successors, (162), 24 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:46:40,451 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:46:40,451 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:46:40,471 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 16:46:40,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:46:40,671 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:46:40,672 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:46:40,672 INFO L85 PathProgramCache]: Analyzing trace with hash 2104775722, now seen corresponding path program 18 times [2024-06-27 16:46:40,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:46:40,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829933672] [2024-06-27 16:46:40,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:46:40,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:46:40,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:46:44,212 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:46:44,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:46:44,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829933672] [2024-06-27 16:46:44,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829933672] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:46:44,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76578952] [2024-06-27 16:46:44,212 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-27 16:46:44,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:46:44,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:46:44,214 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 16:46:44,214 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 16:46:44,298 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-06-27 16:46:44,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:46:44,300 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 40 conjunts are in the unsatisfiable core [2024-06-27 16:46:44,302 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:46:44,314 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-06-27 16:46:44,903 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:46:44,903 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 250 treesize of output 162 [2024-06-27 16:46:45,153 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:46:45,153 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:46:51,902 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:46:51,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76578952] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:46:51,902 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:46:51,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 25 [2024-06-27 16:46:51,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699581994] [2024-06-27 16:46:51,902 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:46:51,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-06-27 16:46:51,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:46:51,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-06-27 16:46:51,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2024-06-27 16:46:51,904 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-06-27 16:46:51,904 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 248 transitions, 3257 flow. Second operand has 25 states, 25 states have (on average 6.68) internal successors, (167), 25 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:46:51,904 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:46:51,905 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-06-27 16:46:51,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:46:59,138 INFO L124 PetriNetUnfolderBase]: 680/1169 cut-off events. [2024-06-27 16:46:59,138 INFO L125 PetriNetUnfolderBase]: For 11252/11252 co-relation queries the response was YES. [2024-06-27 16:46:59,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8736 conditions, 1169 events. 680/1169 cut-off events. For 11252/11252 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 5797 event pairs, 18 based on Foata normal form. 2/1147 useless extension candidates. Maximal degree in co-relation 8667. Up to 851 conditions per place. [2024-06-27 16:46:59,155 INFO L140 encePairwiseOnDemand]: 12/20 looper letters, 186 selfloop transitions, 135 changer transitions 5/329 dead transitions. [2024-06-27 16:46:59,155 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 329 transitions, 4850 flow [2024-06-27 16:46:59,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-06-27 16:46:59,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-06-27 16:46:59,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 217 transitions. [2024-06-27 16:46:59,157 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45208333333333334 [2024-06-27 16:46:59,157 INFO L175 Difference]: Start difference. First operand has 173 places, 248 transitions, 3257 flow. Second operand 24 states and 217 transitions. [2024-06-27 16:46:59,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 329 transitions, 4850 flow [2024-06-27 16:46:59,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 329 transitions, 4352 flow, removed 211 selfloop flow, removed 14 redundant places. [2024-06-27 16:46:59,206 INFO L231 Difference]: Finished difference. Result has 186 places, 294 transitions, 3975 flow [2024-06-27 16:46:59,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=2796, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=3975, PETRI_PLACES=186, PETRI_TRANSITIONS=294} [2024-06-27 16:46:59,207 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 165 predicate places. [2024-06-27 16:46:59,207 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 294 transitions, 3975 flow [2024-06-27 16:46:59,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 6.68) internal successors, (167), 25 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:46:59,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:46:59,207 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:46:59,219 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 16:46:59,408 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,SelfDestructingSolverStorable22 [2024-06-27 16:46:59,408 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:46:59,408 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:46:59,409 INFO L85 PathProgramCache]: Analyzing trace with hash -1258650484, now seen corresponding path program 19 times [2024-06-27 16:46:59,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:46:59,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174177531] [2024-06-27 16:46:59,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:46:59,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:46:59,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:47:00,785 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:47:00,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:47:00,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174177531] [2024-06-27 16:47:00,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174177531] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:47:00,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883865979] [2024-06-27 16:47:00,786 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-06-27 16:47:00,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:47:00,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:47:00,787 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 16:47:00,788 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 16:47:00,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:47:00,890 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 31 conjunts are in the unsatisfiable core [2024-06-27 16:47:00,892 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:47:01,501 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:47:01,502 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 214 treesize of output 142 [2024-06-27 16:47:01,620 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:47:01,620 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:47:02,847 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:47:02,847 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 997 treesize of output 437 [2024-06-27 16:47:09,112 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:47:09,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883865979] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:47:09,112 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:47:09,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 27 [2024-06-27 16:47:09,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942452878] [2024-06-27 16:47:09,113 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:47:09,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-06-27 16:47:09,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:47:09,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-06-27 16:47:09,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2024-06-27 16:47:09,114 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-06-27 16:47:09,115 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 294 transitions, 3975 flow. Second operand has 27 states, 27 states have (on average 6.703703703703703) internal successors, (181), 27 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:47:09,115 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:47:09,115 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-06-27 16:47:09,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:47:10,616 INFO L124 PetriNetUnfolderBase]: 704/1211 cut-off events. [2024-06-27 16:47:10,616 INFO L125 PetriNetUnfolderBase]: For 13400/13400 co-relation queries the response was YES. [2024-06-27 16:47:10,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9308 conditions, 1211 events. 704/1211 cut-off events. For 13400/13400 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 6064 event pairs, 11 based on Foata normal form. 2/1183 useless extension candidates. Maximal degree in co-relation 9236. Up to 972 conditions per place. [2024-06-27 16:47:10,627 INFO L140 encePairwiseOnDemand]: 12/20 looper letters, 239 selfloop transitions, 92 changer transitions 7/341 dead transitions. [2024-06-27 16:47:10,628 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 341 transitions, 5119 flow [2024-06-27 16:47:10,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-06-27 16:47:10,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-06-27 16:47:10,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 194 transitions. [2024-06-27 16:47:10,629 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46190476190476193 [2024-06-27 16:47:10,629 INFO L175 Difference]: Start difference. First operand has 186 places, 294 transitions, 3975 flow. Second operand 21 states and 194 transitions. [2024-06-27 16:47:10,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 341 transitions, 5119 flow [2024-06-27 16:47:10,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 341 transitions, 4700 flow, removed 151 selfloop flow, removed 14 redundant places. [2024-06-27 16:47:10,674 INFO L231 Difference]: Finished difference. Result has 195 places, 302 transitions, 4051 flow [2024-06-27 16:47:10,675 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=3562, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=4051, PETRI_PLACES=195, PETRI_TRANSITIONS=302} [2024-06-27 16:47:10,675 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 174 predicate places. [2024-06-27 16:47:10,675 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 302 transitions, 4051 flow [2024-06-27 16:47:10,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 6.703703703703703) internal successors, (181), 27 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:47:10,675 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:47:10,675 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:47:10,686 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 16:47:10,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-06-27 16:47:10,876 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:47:10,876 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:47:10,877 INFO L85 PathProgramCache]: Analyzing trace with hash 1160507398, now seen corresponding path program 20 times [2024-06-27 16:47:10,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:47:10,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623879734] [2024-06-27 16:47:10,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:47:10,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:47:10,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:47:12,089 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:47:12,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:47:12,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623879734] [2024-06-27 16:47:12,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623879734] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:47:12,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969250223] [2024-06-27 16:47:12,090 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 16:47:12,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:47:12,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:47:12,092 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 16:47:12,112 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 16:47:12,195 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 16:47:12,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:47:12,196 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 33 conjunts are in the unsatisfiable core [2024-06-27 16:47:12,198 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:47:12,739 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:47:12,739 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 234 treesize of output 146 [2024-06-27 16:47:12,855 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:47:12,856 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:47:13,849 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:47:13,850 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 964 treesize of output 436 [2024-06-27 16:47:24,879 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:47:24,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969250223] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:47:24,879 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:47:24,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2024-06-27 16:47:24,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893262744] [2024-06-27 16:47:24,880 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:47:24,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-06-27 16:47:24,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:47:24,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-06-27 16:47:24,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2024-06-27 16:47:24,881 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-06-27 16:47:24,882 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 302 transitions, 4051 flow. Second operand has 23 states, 23 states have (on average 6.739130434782608) internal successors, (155), 23 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:47:24,882 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:47:24,882 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-06-27 16:47:24,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:47:25,736 INFO L124 PetriNetUnfolderBase]: 724/1247 cut-off events. [2024-06-27 16:47:25,736 INFO L125 PetriNetUnfolderBase]: For 13811/13811 co-relation queries the response was YES. [2024-06-27 16:47:25,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9481 conditions, 1247 events. 724/1247 cut-off events. For 13811/13811 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 6314 event pairs, 22 based on Foata normal form. 2/1219 useless extension candidates. Maximal degree in co-relation 9406. Up to 1111 conditions per place. [2024-06-27 16:47:25,749 INFO L140 encePairwiseOnDemand]: 12/20 looper letters, 266 selfloop transitions, 67 changer transitions 5/341 dead transitions. [2024-06-27 16:47:25,749 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 341 transitions, 5147 flow [2024-06-27 16:47:25,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-06-27 16:47:25,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-06-27 16:47:25,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 166 transitions. [2024-06-27 16:47:25,750 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4368421052631579 [2024-06-27 16:47:25,750 INFO L175 Difference]: Start difference. First operand has 195 places, 302 transitions, 4051 flow. Second operand 19 states and 166 transitions. [2024-06-27 16:47:25,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 341 transitions, 5147 flow [2024-06-27 16:47:25,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 341 transitions, 4894 flow, removed 77 selfloop flow, removed 17 redundant places. [2024-06-27 16:47:25,807 INFO L231 Difference]: Finished difference. Result has 200 places, 317 transitions, 4317 flow [2024-06-27 16:47:25,808 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=3798, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=4317, PETRI_PLACES=200, PETRI_TRANSITIONS=317} [2024-06-27 16:47:25,809 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 179 predicate places. [2024-06-27 16:47:25,809 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 317 transitions, 4317 flow [2024-06-27 16:47:25,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 6.739130434782608) internal successors, (155), 23 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:47:25,809 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:47:25,809 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:47:25,827 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 16:47:26,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:47:26,024 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:47:26,025 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:47:26,025 INFO L85 PathProgramCache]: Analyzing trace with hash -1278519468, now seen corresponding path program 21 times [2024-06-27 16:47:26,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:47:26,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549390243] [2024-06-27 16:47:26,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:47:26,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:47:26,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:47:26,951 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:47:26,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:47:26,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549390243] [2024-06-27 16:47:26,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549390243] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:47:26,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165704822] [2024-06-27 16:47:26,952 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 16:47:26,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:47:26,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:47:26,953 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 16:47:26,954 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 16:47:27,059 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-06-27 16:47:27,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:47:27,061 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 39 conjunts are in the unsatisfiable core [2024-06-27 16:47:27,063 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:47:27,108 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-06-27 16:47:27,573 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:47:27,574 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 209 treesize of output 145 [2024-06-27 16:47:27,747 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:47:27,747 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:47:32,254 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:47:32,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [165704822] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:47:32,254 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:47:32,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 25 [2024-06-27 16:47:32,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518951347] [2024-06-27 16:47:32,255 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:47:32,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-06-27 16:47:32,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:47:32,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-06-27 16:47:32,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2024-06-27 16:47:32,256 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-06-27 16:47:32,256 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 317 transitions, 4317 flow. Second operand has 25 states, 25 states have (on average 6.72) internal successors, (168), 25 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:47:32,256 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:47:32,256 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-06-27 16:47:32,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:47:34,622 INFO L124 PetriNetUnfolderBase]: 774/1320 cut-off events. [2024-06-27 16:47:34,622 INFO L125 PetriNetUnfolderBase]: For 19307/19307 co-relation queries the response was YES. [2024-06-27 16:47:34,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10641 conditions, 1320 events. 774/1320 cut-off events. For 19307/19307 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 6660 event pairs, 20 based on Foata normal form. 2/1294 useless extension candidates. Maximal degree in co-relation 10563. Up to 1025 conditions per place. [2024-06-27 16:47:34,636 INFO L140 encePairwiseOnDemand]: 12/20 looper letters, 241 selfloop transitions, 130 changer transitions 6/380 dead transitions. [2024-06-27 16:47:34,636 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 380 transitions, 6106 flow [2024-06-27 16:47:34,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-06-27 16:47:34,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-06-27 16:47:34,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 242 transitions. [2024-06-27 16:47:34,641 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44814814814814813 [2024-06-27 16:47:34,641 INFO L175 Difference]: Start difference. First operand has 200 places, 317 transitions, 4317 flow. Second operand 27 states and 242 transitions. [2024-06-27 16:47:34,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 380 transitions, 6106 flow [2024-06-27 16:47:34,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 380 transitions, 5787 flow, removed 136 selfloop flow, removed 10 redundant places. [2024-06-27 16:47:34,729 INFO L231 Difference]: Finished difference. Result has 218 places, 342 transitions, 5116 flow [2024-06-27 16:47:34,729 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=4000, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=5116, PETRI_PLACES=218, PETRI_TRANSITIONS=342} [2024-06-27 16:47:34,729 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 197 predicate places. [2024-06-27 16:47:34,730 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 342 transitions, 5116 flow [2024-06-27 16:47:34,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 6.72) internal successors, (168), 25 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:47:34,730 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:47:34,730 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:47:34,746 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-06-27 16:47:34,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:47:34,946 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:47:34,946 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:47:34,946 INFO L85 PathProgramCache]: Analyzing trace with hash -557241662, now seen corresponding path program 22 times [2024-06-27 16:47:34,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:47:34,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044288939] [2024-06-27 16:47:34,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:47:34,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:47:34,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:47:40,370 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:47:40,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:47:40,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044288939] [2024-06-27 16:47:40,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044288939] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:47:40,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842735881] [2024-06-27 16:47:40,370 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 16:47:40,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:47:40,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:47:40,371 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:47:40,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-06-27 16:47:40,481 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 16:47:40,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:47:40,482 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 26 conjunts are in the unsatisfiable core [2024-06-27 16:47:40,484 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:47:40,875 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:47:40,875 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 268 treesize of output 164 [2024-06-27 16:47:41,084 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:47:41,085 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:47:41,885 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:47:41,886 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 964 treesize of output 436 [2024-06-27 16:47:49,192 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:47:49,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842735881] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:47:49,192 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:47:49,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 9] total 24 [2024-06-27 16:47:49,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360537329] [2024-06-27 16:47:49,193 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:47:49,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-06-27 16:47:49,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:47:49,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-06-27 16:47:49,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2024-06-27 16:47:49,194 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-06-27 16:47:49,194 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 342 transitions, 5116 flow. Second operand has 24 states, 24 states have (on average 6.75) internal successors, (162), 24 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:47:49,194 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:47:49,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-06-27 16:47:49,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:47:50,374 INFO L124 PetriNetUnfolderBase]: 801/1363 cut-off events. [2024-06-27 16:47:50,375 INFO L125 PetriNetUnfolderBase]: For 20641/20641 co-relation queries the response was YES. [2024-06-27 16:47:50,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11207 conditions, 1363 events. 801/1363 cut-off events. For 20641/20641 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 7000 event pairs, 23 based on Foata normal form. 2/1331 useless extension candidates. Maximal degree in co-relation 11126. Up to 1227 conditions per place. [2024-06-27 16:47:50,386 INFO L140 encePairwiseOnDemand]: 12/20 looper letters, 298 selfloop transitions, 73 changer transitions 5/379 dead transitions. [2024-06-27 16:47:50,387 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 379 transitions, 6380 flow [2024-06-27 16:47:50,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-06-27 16:47:50,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-06-27 16:47:50,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 169 transitions. [2024-06-27 16:47:50,389 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44473684210526315 [2024-06-27 16:47:50,389 INFO L175 Difference]: Start difference. First operand has 218 places, 342 transitions, 5116 flow. Second operand 19 states and 169 transitions. [2024-06-27 16:47:50,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 379 transitions, 6380 flow [2024-06-27 16:47:50,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 379 transitions, 5523 flow, removed 366 selfloop flow, removed 15 redundant places. [2024-06-27 16:47:50,495 INFO L231 Difference]: Finished difference. Result has 225 places, 355 transitions, 4880 flow [2024-06-27 16:47:50,496 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=4265, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=4880, PETRI_PLACES=225, PETRI_TRANSITIONS=355} [2024-06-27 16:47:50,496 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 204 predicate places. [2024-06-27 16:47:50,497 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 355 transitions, 4880 flow [2024-06-27 16:47:50,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 6.75) internal successors, (162), 24 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:47:50,497 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:47:50,497 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:47:50,512 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2024-06-27 16:47:50,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-06-27 16:47:50,712 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:47:50,712 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:47:50,713 INFO L85 PathProgramCache]: Analyzing trace with hash 911440106, now seen corresponding path program 23 times [2024-06-27 16:47:50,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:47:50,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970875055] [2024-06-27 16:47:50,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:47:50,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:47:50,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:47:52,294 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:47:52,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:47:52,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970875055] [2024-06-27 16:47:52,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970875055] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:47:52,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302558676] [2024-06-27 16:47:52,295 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-27 16:47:52,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:47:52,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:47:52,296 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:47:52,298 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-06-27 16:47:52,394 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 16:47:52,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:47:52,396 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 34 conjunts are in the unsatisfiable core [2024-06-27 16:47:52,397 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:47:52,941 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:47:52,942 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 233 treesize of output 141 [2024-06-27 16:47:53,066 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:47:53,067 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:47:54,214 INFO L349 Elim1Store]: treesize reduction 10, result has 73.0 percent of original size [2024-06-27 16:47:54,215 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 933 treesize of output 415 [2024-06-27 16:47:59,169 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:47:59,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302558676] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:47:59,169 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:47:59,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 27 [2024-06-27 16:47:59,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621060136] [2024-06-27 16:47:59,169 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:47:59,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-06-27 16:47:59,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:47:59,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-06-27 16:47:59,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=613, Unknown=0, NotChecked=0, Total=702 [2024-06-27 16:47:59,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-06-27 16:47:59,171 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 355 transitions, 4880 flow. Second operand has 27 states, 27 states have (on average 6.62962962962963) internal successors, (179), 27 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:47:59,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:47:59,172 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-06-27 16:47:59,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:48:02,471 INFO L124 PetriNetUnfolderBase]: 848/1461 cut-off events. [2024-06-27 16:48:02,472 INFO L125 PetriNetUnfolderBase]: For 23384/23384 co-relation queries the response was YES. [2024-06-27 16:48:02,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11671 conditions, 1461 events. 848/1461 cut-off events. For 23384/23384 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 7695 event pairs, 22 based on Foata normal form. 2/1429 useless extension candidates. Maximal degree in co-relation 11583. Up to 1063 conditions per place. [2024-06-27 16:48:02,492 INFO L140 encePairwiseOnDemand]: 12/20 looper letters, 269 selfloop transitions, 160 changer transitions 4/436 dead transitions. [2024-06-27 16:48:02,492 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 436 transitions, 6809 flow [2024-06-27 16:48:02,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-06-27 16:48:02,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2024-06-27 16:48:02,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 289 transitions. [2024-06-27 16:48:02,494 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-27 16:48:02,494 INFO L175 Difference]: Start difference. First operand has 225 places, 355 transitions, 4880 flow. Second operand 34 states and 289 transitions. [2024-06-27 16:48:02,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 436 transitions, 6809 flow [2024-06-27 16:48:02,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 436 transitions, 6394 flow, removed 156 selfloop flow, removed 14 redundant places. [2024-06-27 16:48:02,614 INFO L231 Difference]: Finished difference. Result has 249 places, 389 transitions, 5723 flow [2024-06-27 16:48:02,615 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=4469, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=355, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=5723, PETRI_PLACES=249, PETRI_TRANSITIONS=389} [2024-06-27 16:48:02,615 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 228 predicate places. [2024-06-27 16:48:02,615 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 389 transitions, 5723 flow [2024-06-27 16:48:02,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 6.62962962962963) internal successors, (179), 27 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:48:02,616 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:48:02,616 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:48:02,631 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2024-06-27 16:48:02,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-06-27 16:48:02,831 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:48:02,831 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:48:02,831 INFO L85 PathProgramCache]: Analyzing trace with hash 516984102, now seen corresponding path program 24 times [2024-06-27 16:48:02,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:48:02,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687661708] [2024-06-27 16:48:02,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:48:02,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:48:02,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:48:04,073 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:48:04,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:48:04,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687661708] [2024-06-27 16:48:04,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687661708] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:48:04,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341262190] [2024-06-27 16:48:04,074 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-27 16:48:04,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:48:04,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:48:04,075 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:48:04,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-06-27 16:48:04,176 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-06-27 16:48:04,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:48:04,178 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 33 conjunts are in the unsatisfiable core [2024-06-27 16:48:04,180 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:48:04,766 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:48:04,767 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 234 treesize of output 146 [2024-06-27 16:48:04,886 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:48:04,886 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:48:05,812 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:48:05,813 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 933 treesize of output 425 [2024-06-27 16:48:13,786 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:48:13,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341262190] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:48:13,787 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:48:13,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 26 [2024-06-27 16:48:13,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658961074] [2024-06-27 16:48:13,787 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:48:13,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-06-27 16:48:13,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:48:13,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-06-27 16:48:13,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=576, Unknown=0, NotChecked=0, Total=650 [2024-06-27 16:48:13,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-06-27 16:48:13,789 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 389 transitions, 5723 flow. Second operand has 26 states, 26 states have (on average 6.653846153846154) internal successors, (173), 26 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:48:13,789 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:48:13,789 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-06-27 16:48:13,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:48:16,898 INFO L124 PetriNetUnfolderBase]: 855/1488 cut-off events. [2024-06-27 16:48:16,898 INFO L125 PetriNetUnfolderBase]: For 22612/22612 co-relation queries the response was YES. [2024-06-27 16:48:16,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12001 conditions, 1488 events. 855/1488 cut-off events. For 22612/22612 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 7964 event pairs, 20 based on Foata normal form. 2/1452 useless extension candidates. Maximal degree in co-relation 11907. Up to 1136 conditions per place. [2024-06-27 16:48:16,911 INFO L140 encePairwiseOnDemand]: 12/20 looper letters, 278 selfloop transitions, 155 changer transitions 5/441 dead transitions. [2024-06-27 16:48:16,911 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 441 transitions, 6896 flow [2024-06-27 16:48:16,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-06-27 16:48:16,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2024-06-27 16:48:16,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 270 transitions. [2024-06-27 16:48:16,912 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43548387096774194 [2024-06-27 16:48:16,913 INFO L175 Difference]: Start difference. First operand has 249 places, 389 transitions, 5723 flow. Second operand 31 states and 270 transitions. [2024-06-27 16:48:16,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 441 transitions, 6896 flow [2024-06-27 16:48:16,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 441 transitions, 6214 flow, removed 261 selfloop flow, removed 17 redundant places. [2024-06-27 16:48:17,002 INFO L231 Difference]: Finished difference. Result has 265 places, 397 transitions, 5518 flow [2024-06-27 16:48:17,003 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=5046, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=5518, PETRI_PLACES=265, PETRI_TRANSITIONS=397} [2024-06-27 16:48:17,003 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 244 predicate places. [2024-06-27 16:48:17,004 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 397 transitions, 5518 flow [2024-06-27 16:48:17,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 6.653846153846154) internal successors, (173), 26 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:48:17,004 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:48:17,004 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:48:17,016 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2024-06-27 16:48:17,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-06-27 16:48:17,206 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:48:17,206 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:48:17,206 INFO L85 PathProgramCache]: Analyzing trace with hash -1553140648, now seen corresponding path program 25 times [2024-06-27 16:48:17,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:48:17,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161407222] [2024-06-27 16:48:17,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:48:17,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:48:17,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:48:22,009 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:48:22,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:48:22,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161407222] [2024-06-27 16:48:22,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161407222] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:48:22,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807451660] [2024-06-27 16:48:22,011 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-06-27 16:48:22,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:48:22,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:48:22,012 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:48:22,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-06-27 16:48:22,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:48:22,123 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 31 conjunts are in the unsatisfiable core [2024-06-27 16:48:22,125 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:48:22,605 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:48:22,606 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 231 treesize of output 145 [2024-06-27 16:48:22,810 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:48:22,811 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:48:23,784 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:48:23,784 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 933 treesize of output 425 [2024-06-27 16:48:31,049 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:48:31,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807451660] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:48:31,050 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:48:31,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 25 [2024-06-27 16:48:31,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31472888] [2024-06-27 16:48:31,050 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:48:31,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-06-27 16:48:31,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:48:31,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-06-27 16:48:31,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2024-06-27 16:48:31,051 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-06-27 16:48:31,052 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 397 transitions, 5518 flow. Second operand has 25 states, 25 states have (on average 6.68) internal successors, (167), 25 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:48:31,052 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:48:31,052 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-06-27 16:48:31,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:48:32,525 INFO L124 PetriNetUnfolderBase]: 892/1543 cut-off events. [2024-06-27 16:48:32,525 INFO L125 PetriNetUnfolderBase]: For 19478/19478 co-relation queries the response was YES. [2024-06-27 16:48:32,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12387 conditions, 1543 events. 892/1543 cut-off events. For 19478/19478 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 8347 event pairs, 22 based on Foata normal form. 2/1503 useless extension candidates. Maximal degree in co-relation 12291. Up to 1352 conditions per place. [2024-06-27 16:48:32,537 INFO L140 encePairwiseOnDemand]: 12/20 looper letters, 329 selfloop transitions, 110 changer transitions 5/447 dead transitions. [2024-06-27 16:48:32,537 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 447 transitions, 7025 flow [2024-06-27 16:48:32,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-06-27 16:48:32,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-06-27 16:48:32,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 213 transitions. [2024-06-27 16:48:32,538 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44375 [2024-06-27 16:48:32,538 INFO L175 Difference]: Start difference. First operand has 265 places, 397 transitions, 5518 flow. Second operand 24 states and 213 transitions. [2024-06-27 16:48:32,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 447 transitions, 7025 flow [2024-06-27 16:48:32,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 447 transitions, 6843 flow, removed 41 selfloop flow, removed 22 redundant places. [2024-06-27 16:48:32,610 INFO L231 Difference]: Finished difference. Result has 270 places, 416 transitions, 6126 flow [2024-06-27 16:48:32,610 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=5338, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=6126, PETRI_PLACES=270, PETRI_TRANSITIONS=416} [2024-06-27 16:48:32,610 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 249 predicate places. [2024-06-27 16:48:32,611 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 416 transitions, 6126 flow [2024-06-27 16:48:32,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 6.68) internal successors, (167), 25 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:48:32,611 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:48:32,611 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:48:32,625 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2024-06-27 16:48:32,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:48:32,823 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:48:32,823 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:48:32,823 INFO L85 PathProgramCache]: Analyzing trace with hash -1248349826, now seen corresponding path program 26 times [2024-06-27 16:48:32,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:48:32,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130985898] [2024-06-27 16:48:32,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:48:32,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:48:32,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:48:33,884 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:48:33,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:48:33,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130985898] [2024-06-27 16:48:33,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130985898] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:48:33,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026960455] [2024-06-27 16:48:33,884 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 16:48:33,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:48:33,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:48:33,886 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:48:33,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-06-27 16:48:33,989 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 16:48:33,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:48:33,990 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 33 conjunts are in the unsatisfiable core [2024-06-27 16:48:33,992 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:48:34,492 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:48:34,493 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 245 treesize of output 165 [2024-06-27 16:48:34,729 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:48:34,729 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:48:35,899 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:48:35,899 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 926 treesize of output 444 [2024-06-27 16:48:47,631 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:48:47,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026960455] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:48:47,632 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:48:47,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 22 [2024-06-27 16:48:47,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297205647] [2024-06-27 16:48:47,632 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:48:47,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-06-27 16:48:47,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:48:47,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-06-27 16:48:47,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2024-06-27 16:48:47,634 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-06-27 16:48:47,634 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 416 transitions, 6126 flow. Second operand has 22 states, 22 states have (on average 6.818181818181818) internal successors, (150), 22 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:48:47,634 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:48:47,634 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-06-27 16:48:47,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:48:48,588 INFO L124 PetriNetUnfolderBase]: 950/1631 cut-off events. [2024-06-27 16:48:48,589 INFO L125 PetriNetUnfolderBase]: For 29338/29338 co-relation queries the response was YES. [2024-06-27 16:48:48,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14285 conditions, 1631 events. 950/1631 cut-off events. For 29338/29338 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 8833 event pairs, 10 based on Foata normal form. 2/1591 useless extension candidates. Maximal degree in co-relation 14184. Up to 1369 conditions per place. [2024-06-27 16:48:48,604 INFO L140 encePairwiseOnDemand]: 12/20 looper letters, 358 selfloop transitions, 114 changer transitions 7/482 dead transitions. [2024-06-27 16:48:48,604 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 482 transitions, 8528 flow [2024-06-27 16:48:48,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-06-27 16:48:48,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-06-27 16:48:48,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 208 transitions. [2024-06-27 16:48:48,605 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4727272727272727 [2024-06-27 16:48:48,605 INFO L175 Difference]: Start difference. First operand has 270 places, 416 transitions, 6126 flow. Second operand 22 states and 208 transitions. [2024-06-27 16:48:48,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 482 transitions, 8528 flow [2024-06-27 16:48:48,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 482 transitions, 8030 flow, removed 201 selfloop flow, removed 16 redundant places. [2024-06-27 16:48:48,708 INFO L231 Difference]: Finished difference. Result has 277 places, 444 transitions, 7086 flow [2024-06-27 16:48:48,709 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=5680, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=416, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=7086, PETRI_PLACES=277, PETRI_TRANSITIONS=444} [2024-06-27 16:48:48,709 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 256 predicate places. [2024-06-27 16:48:48,710 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 444 transitions, 7086 flow [2024-06-27 16:48:48,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 6.818181818181818) internal successors, (150), 22 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:48:48,710 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:48:48,710 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:48:48,722 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2024-06-27 16:48:48,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:48:48,912 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:48:48,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:48:48,912 INFO L85 PathProgramCache]: Analyzing trace with hash -250352500, now seen corresponding path program 27 times [2024-06-27 16:48:48,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:48:48,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339481384] [2024-06-27 16:48:48,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:48:48,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:48:48,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:48:50,263 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:48:50,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:48:50,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339481384] [2024-06-27 16:48:50,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339481384] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:48:50,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535003254] [2024-06-27 16:48:50,264 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 16:48:50,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:48:50,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:48:50,265 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:48:50,266 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-06-27 16:48:50,377 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-06-27 16:48:50,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:48:50,378 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 39 conjunts are in the unsatisfiable core [2024-06-27 16:48:50,380 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:48:50,415 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-06-27 16:48:51,047 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:48:51,047 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 205 treesize of output 141 [2024-06-27 16:48:51,145 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:48:51,146 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:48:56,254 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:48:56,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535003254] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:48:56,254 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:48:56,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 27 [2024-06-27 16:48:56,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362004151] [2024-06-27 16:48:56,255 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:48:56,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-06-27 16:48:56,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:48:56,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-06-27 16:48:56,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=620, Unknown=0, NotChecked=0, Total=702 [2024-06-27 16:48:56,256 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-06-27 16:48:56,256 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 444 transitions, 7086 flow. Second operand has 27 states, 27 states have (on average 6.703703703703703) internal successors, (181), 27 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:48:56,256 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:48:56,257 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-06-27 16:48:56,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:49:01,155 INFO L124 PetriNetUnfolderBase]: 1050/1809 cut-off events. [2024-06-27 16:49:01,155 INFO L125 PetriNetUnfolderBase]: For 41812/41812 co-relation queries the response was YES. [2024-06-27 16:49:01,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17062 conditions, 1809 events. 1050/1809 cut-off events. For 41812/41812 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 9931 event pairs, 12 based on Foata normal form. 2/1769 useless extension candidates. Maximal degree in co-relation 16960. Up to 969 conditions per place. [2024-06-27 16:49:01,175 INFO L140 encePairwiseOnDemand]: 12/20 looper letters, 289 selfloop transitions, 279 changer transitions 6/577 dead transitions. [2024-06-27 16:49:01,175 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 577 transitions, 10625 flow [2024-06-27 16:49:01,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-06-27 16:49:01,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2024-06-27 16:49:01,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 357 transitions. [2024-06-27 16:49:01,177 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48243243243243245 [2024-06-27 16:49:01,177 INFO L175 Difference]: Start difference. First operand has 277 places, 444 transitions, 7086 flow. Second operand 37 states and 357 transitions. [2024-06-27 16:49:01,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 577 transitions, 10625 flow [2024-06-27 16:49:01,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 577 transitions, 9594 flow, removed 476 selfloop flow, removed 14 redundant places. [2024-06-27 16:49:01,387 INFO L231 Difference]: Finished difference. Result has 305 places, 502 transitions, 8939 flow [2024-06-27 16:49:01,388 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=6173, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=444, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=227, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=8939, PETRI_PLACES=305, PETRI_TRANSITIONS=502} [2024-06-27 16:49:01,389 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 284 predicate places. [2024-06-27 16:49:01,389 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 502 transitions, 8939 flow [2024-06-27 16:49:01,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 6.703703703703703) internal successors, (181), 27 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:49:01,389 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:49:01,389 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:49:01,401 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2024-06-27 16:49:01,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:49:01,591 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:49:01,592 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:49:01,592 INFO L85 PathProgramCache]: Analyzing trace with hash -1170595316, now seen corresponding path program 28 times [2024-06-27 16:49:01,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:49:01,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925150774] [2024-06-27 16:49:01,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:49:01,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:49:01,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:49:03,995 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:49:03,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:49:03,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925150774] [2024-06-27 16:49:03,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925150774] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:49:03,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621543891] [2024-06-27 16:49:03,995 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 16:49:03,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:49:03,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:49:03,997 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:49:03,997 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-06-27 16:49:04,110 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 16:49:04,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:49:04,112 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 26 conjunts are in the unsatisfiable core [2024-06-27 16:49:04,113 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:49:04,553 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:49:04,554 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 204 treesize of output 144 [2024-06-27 16:49:04,760 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:49:04,760 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:49:05,782 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:49:05,782 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 926 treesize of output 444 [2024-06-27 16:49:16,179 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:49:16,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621543891] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:49:16,180 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:49:16,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 9] total 24 [2024-06-27 16:49:16,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858409647] [2024-06-27 16:49:16,180 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:49:16,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-06-27 16:49:16,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:49:16,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-06-27 16:49:16,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2024-06-27 16:49:16,181 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-06-27 16:49:16,182 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 502 transitions, 8939 flow. Second operand has 24 states, 24 states have (on average 6.75) internal successors, (162), 24 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:49:16,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:49:16,182 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-06-27 16:49:16,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:49:17,319 INFO L124 PetriNetUnfolderBase]: 1052/1823 cut-off events. [2024-06-27 16:49:17,319 INFO L125 PetriNetUnfolderBase]: For 42073/42073 co-relation queries the response was YES. [2024-06-27 16:49:17,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17159 conditions, 1823 events. 1052/1823 cut-off events. For 42073/42073 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 10111 event pairs, 29 based on Foata normal form. 2/1779 useless extension candidates. Maximal degree in co-relation 17050. Up to 1681 conditions per place. [2024-06-27 16:49:17,341 INFO L140 encePairwiseOnDemand]: 12/20 looper letters, 440 selfloop transitions, 82 changer transitions 6/531 dead transitions. [2024-06-27 16:49:17,341 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 531 transitions, 10253 flow [2024-06-27 16:49:17,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-06-27 16:49:17,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-06-27 16:49:17,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 180 transitions. [2024-06-27 16:49:17,342 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-27 16:49:17,342 INFO L175 Difference]: Start difference. First operand has 305 places, 502 transitions, 8939 flow. Second operand 20 states and 180 transitions. [2024-06-27 16:49:17,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 531 transitions, 10253 flow [2024-06-27 16:49:17,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 531 transitions, 8811 flow, removed 687 selfloop flow, removed 17 redundant places. [2024-06-27 16:49:17,565 INFO L231 Difference]: Finished difference. Result has 310 places, 505 transitions, 7789 flow [2024-06-27 16:49:17,565 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=7523, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=502, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=421, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=7789, PETRI_PLACES=310, PETRI_TRANSITIONS=505} [2024-06-27 16:49:17,566 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 289 predicate places. [2024-06-27 16:49:17,566 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 505 transitions, 7789 flow [2024-06-27 16:49:17,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 6.75) internal successors, (162), 24 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:49:17,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:49:17,567 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:49:17,581 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2024-06-27 16:49:17,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2024-06-27 16:49:17,780 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:49:17,781 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:49:17,781 INFO L85 PathProgramCache]: Analyzing trace with hash -1406377308, now seen corresponding path program 29 times [2024-06-27 16:49:17,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:49:17,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903274279] [2024-06-27 16:49:17,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:49:17,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:49:17,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:49:17,868 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:49:17,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:49:17,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903274279] [2024-06-27 16:49:17,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903274279] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:49:17,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660967110] [2024-06-27 16:49:17,869 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-27 16:49:17,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:49:17,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:49:17,870 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:49:17,870 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-06-27 16:49:18,005 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-06-27 16:49:18,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:49:18,007 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 10 conjunts are in the unsatisfiable core [2024-06-27 16:49:18,008 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:49:18,074 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:49:18,074 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:49:18,124 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:49:18,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660967110] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:49:18,124 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:49:18,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2024-06-27 16:49:18,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178952182] [2024-06-27 16:49:18,124 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:49:18,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-06-27 16:49:18,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:49:18,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-06-27 16:49:18,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2024-06-27 16:49:18,125 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-06-27 16:49:18,126 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 505 transitions, 7789 flow. Second operand has 17 states, 17 states have (on average 6.882352941176471) internal successors, (117), 17 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:49:18,126 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:49:18,126 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-06-27 16:49:18,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:49:18,548 INFO L124 PetriNetUnfolderBase]: 697/1296 cut-off events. [2024-06-27 16:49:18,548 INFO L125 PetriNetUnfolderBase]: For 21061/21061 co-relation queries the response was YES. [2024-06-27 16:49:18,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10895 conditions, 1296 events. 697/1296 cut-off events. For 21061/21061 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 7229 event pairs, 129 based on Foata normal form. 78/1348 useless extension candidates. Maximal degree in co-relation 10782. Up to 464 conditions per place. [2024-06-27 16:49:18,559 INFO L140 encePairwiseOnDemand]: 15/20 looper letters, 330 selfloop transitions, 69 changer transitions 35/437 dead transitions. [2024-06-27 16:49:18,559 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 437 transitions, 7763 flow [2024-06-27 16:49:18,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 16:49:18,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 16:49:18,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 91 transitions. [2024-06-27 16:49:18,560 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5055555555555555 [2024-06-27 16:49:18,560 INFO L175 Difference]: Start difference. First operand has 310 places, 505 transitions, 7789 flow. Second operand 9 states and 91 transitions. [2024-06-27 16:49:18,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 437 transitions, 7763 flow [2024-06-27 16:49:18,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 437 transitions, 7404 flow, removed 115 selfloop flow, removed 20 redundant places. [2024-06-27 16:49:18,653 INFO L231 Difference]: Finished difference. Result has 296 places, 371 transitions, 5718 flow [2024-06-27 16:49:18,653 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=5853, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5718, PETRI_PLACES=296, PETRI_TRANSITIONS=371} [2024-06-27 16:49:18,653 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 275 predicate places. [2024-06-27 16:49:18,653 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 371 transitions, 5718 flow [2024-06-27 16:49:18,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 6.882352941176471) internal successors, (117), 17 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:49:18,654 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:49:18,654 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:49:18,665 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2024-06-27 16:49:18,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:49:18,854 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:49:18,855 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:49:18,855 INFO L85 PathProgramCache]: Analyzing trace with hash -1205860715, now seen corresponding path program 30 times [2024-06-27 16:49:18,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:49:18,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343108151] [2024-06-27 16:49:18,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:49:18,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:49:18,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:49:18,946 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:49:18,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:49:18,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343108151] [2024-06-27 16:49:18,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343108151] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:49:18,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319789674] [2024-06-27 16:49:18,947 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-27 16:49:18,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:49:18,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:49:18,948 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:49:18,949 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-06-27 16:49:19,036 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-06-27 16:49:19,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:49:19,037 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 10 conjunts are in the unsatisfiable core [2024-06-27 16:49:19,038 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:49:19,111 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:49:19,111 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:49:19,164 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:49:19,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319789674] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:49:19,165 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:49:19,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2024-06-27 16:49:19,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665694507] [2024-06-27 16:49:19,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:49:19,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-06-27 16:49:19,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:49:19,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-06-27 16:49:19,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2024-06-27 16:49:19,166 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-06-27 16:49:19,167 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 371 transitions, 5718 flow. Second operand has 17 states, 17 states have (on average 7.0588235294117645) internal successors, (120), 17 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:49:19,167 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:49:19,167 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-06-27 16:49:19,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:49:19,441 INFO L124 PetriNetUnfolderBase]: 487/923 cut-off events. [2024-06-27 16:49:19,442 INFO L125 PetriNetUnfolderBase]: For 12772/12772 co-relation queries the response was YES. [2024-06-27 16:49:19,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7748 conditions, 923 events. 487/923 cut-off events. For 12772/12772 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 4848 event pairs, 124 based on Foata normal form. 50/948 useless extension candidates. Maximal degree in co-relation 7655. Up to 555 conditions per place. [2024-06-27 16:49:19,450 INFO L140 encePairwiseOnDemand]: 15/20 looper letters, 222 selfloop transitions, 36 changer transitions 44/305 dead transitions. [2024-06-27 16:49:19,450 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 305 transitions, 5179 flow [2024-06-27 16:49:19,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 16:49:19,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 16:49:19,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 86 transitions. [2024-06-27 16:49:19,451 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4777777777777778 [2024-06-27 16:49:19,451 INFO L175 Difference]: Start difference. First operand has 296 places, 371 transitions, 5718 flow. Second operand 9 states and 86 transitions. [2024-06-27 16:49:19,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 305 transitions, 5179 flow [2024-06-27 16:49:19,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 305 transitions, 4979 flow, removed 59 selfloop flow, removed 21 redundant places. [2024-06-27 16:49:19,525 INFO L231 Difference]: Finished difference. Result has 264 places, 257 transitions, 3747 flow [2024-06-27 16:49:19,526 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=4203, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3747, PETRI_PLACES=264, PETRI_TRANSITIONS=257} [2024-06-27 16:49:19,526 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 243 predicate places. [2024-06-27 16:49:19,526 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 257 transitions, 3747 flow [2024-06-27 16:49:19,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 7.0588235294117645) internal successors, (120), 17 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:49:19,527 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:49:19,527 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:49:19,540 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2024-06-27 16:49:19,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:49:19,734 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:49:19,734 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:49:19,734 INFO L85 PathProgramCache]: Analyzing trace with hash 1078425209, now seen corresponding path program 31 times [2024-06-27 16:49:19,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:49:19,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458223611] [2024-06-27 16:49:19,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:49:19,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:49:19,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:49:19,836 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:49:19,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:49:19,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458223611] [2024-06-27 16:49:19,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458223611] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:49:19,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467520315] [2024-06-27 16:49:19,838 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-06-27 16:49:19,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:49:19,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:49:19,839 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:49:19,840 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-06-27 16:49:19,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:49:19,930 INFO L262 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 10 conjunts are in the unsatisfiable core [2024-06-27 16:49:19,930 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:49:20,002 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:49:20,002 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:49:20,062 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:49:20,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467520315] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:49:20,062 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:49:20,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2024-06-27 16:49:20,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952665069] [2024-06-27 16:49:20,063 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:49:20,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-06-27 16:49:20,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:49:20,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-06-27 16:49:20,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2024-06-27 16:49:20,063 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-06-27 16:49:20,064 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 257 transitions, 3747 flow. Second operand has 18 states, 18 states have (on average 6.833333333333333) internal successors, (123), 18 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:49:20,064 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:49:20,064 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-06-27 16:49:20,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:49:20,271 INFO L124 PetriNetUnfolderBase]: 389/690 cut-off events. [2024-06-27 16:49:20,272 INFO L125 PetriNetUnfolderBase]: For 13916/13916 co-relation queries the response was YES. [2024-06-27 16:49:20,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6020 conditions, 690 events. 389/690 cut-off events. For 13916/13916 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 3085 event pairs, 16 based on Foata normal form. 40/706 useless extension candidates. Maximal degree in co-relation 5935. Up to 440 conditions per place. [2024-06-27 16:49:20,278 INFO L140 encePairwiseOnDemand]: 15/20 looper letters, 179 selfloop transitions, 65 changer transitions 0/247 dead transitions. [2024-06-27 16:49:20,278 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 247 transitions, 4290 flow [2024-06-27 16:49:20,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 16:49:20,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 16:49:20,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 86 transitions. [2024-06-27 16:49:20,279 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43 [2024-06-27 16:49:20,279 INFO L175 Difference]: Start difference. First operand has 264 places, 257 transitions, 3747 flow. Second operand 10 states and 86 transitions. [2024-06-27 16:49:20,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 247 transitions, 4290 flow [2024-06-27 16:49:20,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 247 transitions, 3858 flow, removed 62 selfloop flow, removed 24 redundant places. [2024-06-27 16:49:20,327 INFO L231 Difference]: Finished difference. Result has 210 places, 232 transitions, 3277 flow [2024-06-27 16:49:20,327 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=2987, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3277, PETRI_PLACES=210, PETRI_TRANSITIONS=232} [2024-06-27 16:49:20,327 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 189 predicate places. [2024-06-27 16:49:20,328 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 232 transitions, 3277 flow [2024-06-27 16:49:20,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 6.833333333333333) internal successors, (123), 18 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:49:20,328 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:49:20,328 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:49:20,343 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2024-06-27 16:49:20,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2024-06-27 16:49:20,543 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:49:20,543 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:49:20,544 INFO L85 PathProgramCache]: Analyzing trace with hash 595939948, now seen corresponding path program 32 times [2024-06-27 16:49:20,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:49:20,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114214744] [2024-06-27 16:49:20,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:49:20,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:49:20,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:49:20,643 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:49:20,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:49:20,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114214744] [2024-06-27 16:49:20,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114214744] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:49:20,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061468098] [2024-06-27 16:49:20,644 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 16:49:20,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:49:20,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:49:20,645 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:49:20,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2024-06-27 16:49:20,736 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 16:49:20,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:49:20,737 INFO L262 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 10 conjunts are in the unsatisfiable core [2024-06-27 16:49:20,738 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:49:20,820 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:49:20,820 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:49:20,893 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:49:20,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061468098] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:49:20,893 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:49:20,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2024-06-27 16:49:20,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359454878] [2024-06-27 16:49:20,893 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:49:20,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-06-27 16:49:20,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:49:20,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-06-27 16:49:20,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2024-06-27 16:49:20,895 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-06-27 16:49:20,895 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 232 transitions, 3277 flow. Second operand has 18 states, 18 states have (on average 7.0) internal successors, (126), 18 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:49:20,895 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:49:20,895 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-06-27 16:49:20,895 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:49:21,103 INFO L124 PetriNetUnfolderBase]: 348/628 cut-off events. [2024-06-27 16:49:21,103 INFO L125 PetriNetUnfolderBase]: For 12453/12453 co-relation queries the response was YES. [2024-06-27 16:49:21,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5312 conditions, 628 events. 348/628 cut-off events. For 12453/12453 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 2718 event pairs, 21 based on Foata normal form. 40/653 useless extension candidates. Maximal degree in co-relation 5240. Up to 333 conditions per place. [2024-06-27 16:49:21,107 INFO L140 encePairwiseOnDemand]: 15/20 looper letters, 157 selfloop transitions, 54 changer transitions 0/214 dead transitions. [2024-06-27 16:49:21,107 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 214 transitions, 3472 flow [2024-06-27 16:49:21,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 16:49:21,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 16:49:21,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 83 transitions. [2024-06-27 16:49:21,108 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.415 [2024-06-27 16:49:21,108 INFO L175 Difference]: Start difference. First operand has 210 places, 232 transitions, 3277 flow. Second operand 10 states and 83 transitions. [2024-06-27 16:49:21,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 214 transitions, 3472 flow [2024-06-27 16:49:21,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 214 transitions, 3304 flow, removed 28 selfloop flow, removed 19 redundant places. [2024-06-27 16:49:21,136 INFO L231 Difference]: Finished difference. Result has 187 places, 203 transitions, 2802 flow [2024-06-27 16:49:21,136 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=2602, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2802, PETRI_PLACES=187, PETRI_TRANSITIONS=203} [2024-06-27 16:49:21,136 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 166 predicate places. [2024-06-27 16:49:21,136 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 203 transitions, 2802 flow [2024-06-27 16:49:21,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 7.0) internal successors, (126), 18 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:49:21,137 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:49:21,137 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:49:21,148 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2024-06-27 16:49:21,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2024-06-27 16:49:21,337 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:49:21,338 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:49:21,338 INFO L85 PathProgramCache]: Analyzing trace with hash 2131008803, now seen corresponding path program 33 times [2024-06-27 16:49:21,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:49:21,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066159839] [2024-06-27 16:49:21,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:49:21,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:49:21,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:49:23,750 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:49:23,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:49:23,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066159839] [2024-06-27 16:49:23,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066159839] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:49:23,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502023792] [2024-06-27 16:49:23,751 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 16:49:23,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:49:23,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:49:23,752 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:49:23,753 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2024-06-27 16:49:23,874 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-06-27 16:49:23,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:49:23,876 INFO L262 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 42 conjunts are in the unsatisfiable core [2024-06-27 16:49:23,877 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:49:25,469 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:49:25,469 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 384 treesize of output 228 [2024-06-27 16:49:25,683 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:49:25,683 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:51:54,229 WARN L293 SmtUtils]: Spent 2.20m on a formula simplification. DAG size of input: 2723 DAG size of output: 2712 (called from [L 346] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2024-06-27 16:51:54,230 INFO L349 Elim1Store]: treesize reduction 30, result has 99.5 percent of original size [2024-06-27 16:51:54,234 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 37 select indices, 37 select index equivalence classes, 0 disjoint index pairs (out of 666 index pairs), introduced 37 new quantified variables, introduced 666 case distinctions, treesize of input 5880 treesize of output 7406 [2024-06-27 16:55:13,522 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 101 [2024-06-27 16:55:13,522 WARN L249 Executor]: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) stderr output: (error "out of memory") [2024-06-27 16:55:13,523 WARN L320 FreeRefinementEngine]: Global settings require throwing the following exception [2024-06-27 16:55:13,535 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2024-06-27 16:55:13,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2024-06-27 16:55:13,729 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:262) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseSuccess(Executor.java:277) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.push(Scriptor.java:133) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript.push(DiffWrapperScript.java:90) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.push(WrapperScript.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.scripttransfer.HistoryRecordingScript.push(HistoryRecordingScript.java:107) at de.uni_freiburg.informatik.ultimate.logic.Util.checkSat(Util.java:48) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.checkRedundancy(SimplifyDDA2.java:287) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.convertForPreprocessedInputTerms(SimplifyDDA2.java:519) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.convert(SimplifyDDA2.java:503) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.convert(SimplifyDDA2.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:88) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:84) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.simplify(SimplifyDDA2.java:609) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplify(SmtUtils.java:252) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplifyWithStatistics(SmtUtils.java:324) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify(QuantifierPusher.java:731) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:133) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:209) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:100) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:84) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:297) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.pushMinionEliminatees(QuantifierPushUtilsForSubsetPush.java:255) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.sequentialSubsetPush(QuantifierPushUtilsForSubsetPush.java:151) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:338) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:189) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:209) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:100) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:84) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:297) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.pushMinionEliminatees(QuantifierPushUtilsForSubsetPush.java:255) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.sequentialSubsetPush(QuantifierPushUtilsForSubsetPush.java:151) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:338) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:189) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:209) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:100) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:84) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:297) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:283) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.eliminate(PartialQuantifierElimination.java:51) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:238) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:420) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeBackwardSequence(IterativePredicateTransformer.java:399) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeWeakestPreconditionSequence(IterativePredicateTransformer.java:271) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:341) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:184) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:162) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:110) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:416) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1518) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:701) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:383) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:258) ... 78 more [2024-06-27 16:55:13,733 INFO L158 Benchmark]: Toolchain (without parser) took 637525.33ms. Allocated memory was 153.1MB in the beginning and 1.8GB in the end (delta: 1.7GB). Free memory was 86.2MB in the beginning and 1.5GB in the end (delta: -1.4GB). Peak memory consumption was 1.1GB. Max. memory is 16.1GB. [2024-06-27 16:55:13,733 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 153.1MB. Free memory was 119.3MB in the beginning and 119.3MB in the end (delta: 30.1kB). There was no memory consumed. Max. memory is 16.1GB. [2024-06-27 16:55:13,733 INFO L158 Benchmark]: CACSL2BoogieTranslator took 387.88ms. Allocated memory is still 153.1MB. Free memory was 85.9MB in the beginning and 120.4MB in the end (delta: -34.5MB). Peak memory consumption was 7.1MB. Max. memory is 16.1GB. [2024-06-27 16:55:13,733 INFO L158 Benchmark]: Boogie Procedure Inliner took 64.26ms. Allocated memory is still 153.1MB. Free memory was 120.4MB in the beginning and 117.5MB in the end (delta: 2.9MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2024-06-27 16:55:13,733 INFO L158 Benchmark]: Boogie Preprocessor took 90.60ms. Allocated memory is still 153.1MB. Free memory was 117.5MB in the beginning and 114.2MB in the end (delta: 3.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-06-27 16:55:13,734 INFO L158 Benchmark]: RCFGBuilder took 1013.19ms. Allocated memory was 153.1MB in the beginning and 184.5MB in the end (delta: 31.5MB). Free memory was 114.2MB in the beginning and 90.5MB in the end (delta: 23.8MB). Peak memory consumption was 64.3MB. Max. memory is 16.1GB. [2024-06-27 16:55:13,734 INFO L158 Benchmark]: TraceAbstraction took 635962.94ms. Allocated memory was 184.5MB in the beginning and 1.8GB in the end (delta: 1.6GB). Free memory was 90.5MB in the beginning and 1.5GB in the end (delta: -1.4GB). Peak memory consumption was 1.1GB. Max. memory is 16.1GB. [2024-06-27 16:55:13,735 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 153.1MB. Free memory was 119.3MB in the beginning and 119.3MB in the end (delta: 30.1kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 387.88ms. Allocated memory is still 153.1MB. Free memory was 85.9MB in the beginning and 120.4MB in the end (delta: -34.5MB). Peak memory consumption was 7.1MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 64.26ms. Allocated memory is still 153.1MB. Free memory was 120.4MB in the beginning and 117.5MB in the end (delta: 2.9MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 90.60ms. Allocated memory is still 153.1MB. Free memory was 117.5MB in the beginning and 114.2MB in the end (delta: 3.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 1013.19ms. Allocated memory was 153.1MB in the beginning and 184.5MB in the end (delta: 31.5MB). Free memory was 114.2MB in the beginning and 90.5MB in the end (delta: 23.8MB). Peak memory consumption was 64.3MB. Max. memory is 16.1GB. * TraceAbstraction took 635962.94ms. Allocated memory was 184.5MB in the beginning and 1.8GB in the end (delta: 1.6GB). Free memory was 90.5MB in the beginning and 1.5GB in the end (delta: -1.4GB). Peak memory consumption was 1.1GB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") : de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:262) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### 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/parallel-misc-1.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.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 faddac23864cc4e42f962ac43a8d0f59593853dbb1d55e3baabe0c76b2187dd4 --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 16:55:15,837 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 16:55:15,936 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2024-06-27 16:55:15,941 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 16:55:15,942 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 16:55:15,973 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 16:55:15,973 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 16:55:15,974 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 16:55:15,974 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 16:55:15,978 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 16:55:15,979 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 16:55:15,979 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 16:55:15,979 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 16:55:15,980 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 16:55:15,981 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 16:55:15,981 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 16:55:15,982 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 16:55:15,982 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 16:55:15,982 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 16:55:15,982 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 16:55:15,983 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 16:55:15,983 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 16:55:15,984 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 16:55:15,984 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-06-27 16:55:15,984 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-06-27 16:55:15,984 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 16:55:15,985 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-06-27 16:55:15,985 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 16:55:15,985 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 16:55:15,985 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 16:55:15,986 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 16:55:15,987 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 16:55:15,987 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 16:55:15,987 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 16:55:15,987 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 16:55:15,987 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 16:55:15,988 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 16:55:15,988 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 16:55:15,989 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2024-06-27 16:55:15,989 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-06-27 16:55:15,989 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 16:55:15,989 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 16:55:15,989 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 16:55:15,990 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 16:55:15,990 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 16:55:15,990 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2024-06-27 16:55:15,990 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> faddac23864cc4e42f962ac43a8d0f59593853dbb1d55e3baabe0c76b2187dd4 [2024-06-27 16:55:16,291 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 16:55:16,313 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 16:55:16,316 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 16:55:16,317 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 16:55:16,318 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 16:55:16,319 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/parallel-misc-1.wvr.c [2024-06-27 16:55:17,500 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 16:55:17,693 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 16:55:17,693 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-misc-1.wvr.c [2024-06-27 16:55:17,703 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f7ec6cb58/550cecc9fd1f4865ae5e95bf5f049cf6/FLAG6d8739ec5 [2024-06-27 16:55:17,718 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f7ec6cb58/550cecc9fd1f4865ae5e95bf5f049cf6 [2024-06-27 16:55:17,720 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 16:55:17,721 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-06-27 16:55:17,724 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 16:55:17,724 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 16:55:17,729 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 16:55:17,729 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 04:55:17" (1/1) ... [2024-06-27 16:55:17,730 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@642790ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:55:17, skipping insertion in model container [2024-06-27 16:55:17,730 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 04:55:17" (1/1) ... [2024-06-27 16:55:17,756 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 16:55:17,992 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/parallel-misc-1.wvr.c[2781,2794] [2024-06-27 16:55:18,010 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 16:55:18,023 INFO L199 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2024-06-27 16:55:18,030 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 16:55:18,054 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/parallel-misc-1.wvr.c[2781,2794] [2024-06-27 16:55:18,062 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 16:55:18,068 INFO L202 MainTranslator]: Completed pre-run [2024-06-27 16:55:18,103 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/parallel-misc-1.wvr.c[2781,2794] [2024-06-27 16:55:18,106 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 16:55:18,124 INFO L206 MainTranslator]: Completed translation [2024-06-27 16:55:18,125 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:55:18 WrapperNode [2024-06-27 16:55:18,125 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 16:55:18,126 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 16:55:18,126 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 16:55:18,126 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 16:55:18,132 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:55:18" (1/1) ... [2024-06-27 16:55:18,155 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:55:18" (1/1) ... [2024-06-27 16:55:18,195 INFO L138 Inliner]: procedures = 24, calls = 31, calls flagged for inlining = 17, calls inlined = 31, statements flattened = 259 [2024-06-27 16:55:18,195 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 16:55:18,196 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 16:55:18,196 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 16:55:18,196 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 16:55:18,217 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:55:18" (1/1) ... [2024-06-27 16:55:18,217 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:55:18" (1/1) ... [2024-06-27 16:55:18,221 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:55:18" (1/1) ... [2024-06-27 16:55:18,234 INFO L175 MemorySlicer]: Split 9 memory accesses to 2 slices as follows [2, 7]. 78 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-06-27 16:55:18,234 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:55:18" (1/1) ... [2024-06-27 16:55:18,235 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:55:18" (1/1) ... [2024-06-27 16:55:18,253 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:55:18" (1/1) ... [2024-06-27 16:55:18,257 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:55:18" (1/1) ... [2024-06-27 16:55:18,259 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:55:18" (1/1) ... [2024-06-27 16:55:18,261 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:55:18" (1/1) ... [2024-06-27 16:55:18,265 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 16:55:18,265 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 16:55:18,265 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 16:55:18,266 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 16:55:18,266 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:55:18" (1/1) ... [2024-06-27 16:55:18,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 16:55:18,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:55:18,292 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 16:55:18,294 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 16:55:18,329 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 16:55:18,329 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-06-27 16:55:18,329 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-06-27 16:55:18,330 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-06-27 16:55:18,330 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-06-27 16:55:18,330 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-06-27 16:55:18,330 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2024-06-27 16:55:18,330 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-06-27 16:55:18,330 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2024-06-27 16:55:18,331 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#1 [2024-06-27 16:55:18,331 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 16:55:18,331 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 16:55:18,331 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2024-06-27 16:55:18,331 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#1 [2024-06-27 16:55:18,333 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 16:55:18,433 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 16:55:18,435 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 16:55:18,987 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 16:55:18,987 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 16:55:19,439 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 16:55:19,439 INFO L320 CfgBuilder]: Removed 3 assume(true) statements. [2024-06-27 16:55:19,441 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 04:55:19 BoogieIcfgContainer [2024-06-27 16:55:19,442 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 16:55:19,443 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 16:55:19,443 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 16:55:19,446 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 16:55:19,446 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 04:55:17" (1/3) ... [2024-06-27 16:55:19,447 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4099f04c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 04:55:19, skipping insertion in model container [2024-06-27 16:55:19,447 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:55:18" (2/3) ... [2024-06-27 16:55:19,449 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4099f04c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 04:55:19, skipping insertion in model container [2024-06-27 16:55:19,449 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 04:55:19" (3/3) ... [2024-06-27 16:55:19,450 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-misc-1.wvr.c [2024-06-27 16:55:19,459 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2024-06-27 16:55:19,467 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 16:55:19,467 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-06-27 16:55:19,467 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 16:55:19,537 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-06-27 16:55:19,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 24 places, 20 transitions, 54 flow [2024-06-27 16:55:19,597 INFO L124 PetriNetUnfolderBase]: 3/18 cut-off events. [2024-06-27 16:55:19,597 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-06-27 16:55:19,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27 conditions, 18 events. 3/18 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 10 event pairs, 0 based on Foata normal form. 0/14 useless extension candidates. Maximal degree in co-relation 11. Up to 2 conditions per place. [2024-06-27 16:55:19,601 INFO L82 GeneralOperation]: Start removeDead. Operand has 24 places, 20 transitions, 54 flow [2024-06-27 16:55:19,606 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 21 places, 17 transitions, 46 flow [2024-06-27 16:55:19,620 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 16:55:19,630 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;@3e2cc178, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 16:55:19,630 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-06-27 16:55:19,641 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 16:55:19,641 INFO L124 PetriNetUnfolderBase]: 3/16 cut-off events. [2024-06-27 16:55:19,642 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-06-27 16:55:19,642 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:55:19,643 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:55:19,643 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:55:19,647 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:55:19,647 INFO L85 PathProgramCache]: Analyzing trace with hash -150851992, now seen corresponding path program 1 times [2024-06-27 16:55:19,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-06-27 16:55:19,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [458979709] [2024-06-27 16:55:19,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:55:19,663 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-27 16:55:19,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-06-27 16:55:19,670 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-06-27 16:55:19,677 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2024-06-27 16:55:19,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:55:19,793 INFO L262 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 6 conjunts are in the unsatisfiable core [2024-06-27 16:55:19,797 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:55:19,987 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 16:55:19,987 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-27 16:55:19,988 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-06-27 16:55:19,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [458979709] [2024-06-27 16:55:19,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [458979709] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:55:19,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:55:19,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 16:55:19,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448539416] [2024-06-27 16:55:19,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:55:19,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 16:55:20,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-06-27 16:55:20,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 16:55:20,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 16:55:20,027 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-06-27 16:55:20,029 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 46 flow. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:55:20,029 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:55:20,029 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-06-27 16:55:20,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:55:20,250 INFO L124 PetriNetUnfolderBase]: 93/152 cut-off events. [2024-06-27 16:55:20,250 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2024-06-27 16:55:20,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 324 conditions, 152 events. 93/152 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 416 event pairs, 8 based on Foata normal form. 1/97 useless extension candidates. Maximal degree in co-relation 267. Up to 102 conditions per place. [2024-06-27 16:55:20,253 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 25 selfloop transitions, 10 changer transitions 1/39 dead transitions. [2024-06-27 16:55:20,254 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 39 transitions, 177 flow [2024-06-27 16:55:20,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 16:55:20,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 16:55:20,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 62 transitions. [2024-06-27 16:55:20,264 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.62 [2024-06-27 16:55:20,266 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 46 flow. Second operand 5 states and 62 transitions. [2024-06-27 16:55:20,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 39 transitions, 177 flow [2024-06-27 16:55:20,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 39 transitions, 159 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-27 16:55:20,271 INFO L231 Difference]: Finished difference. Result has 24 places, 26 transitions, 101 flow [2024-06-27 16:55:20,272 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=101, PETRI_PLACES=24, PETRI_TRANSITIONS=26} [2024-06-27 16:55:20,276 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 3 predicate places. [2024-06-27 16:55:20,276 INFO L495 AbstractCegarLoop]: Abstraction has has 24 places, 26 transitions, 101 flow [2024-06-27 16:55:20,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:55:20,276 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:55:20,276 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:55:20,287 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Ended with exit code 0 [2024-06-27 16:55:20,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-27 16:55:20,481 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:55:20,482 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:55:20,482 INFO L85 PathProgramCache]: Analyzing trace with hash -2024118473, now seen corresponding path program 1 times [2024-06-27 16:55:20,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-06-27 16:55:20,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1670923052] [2024-06-27 16:55:20,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:55:20,485 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-27 16:55:20,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-06-27 16:55:20,487 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-06-27 16:55:20,500 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2024-06-27 16:55:20,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:55:20,620 INFO L262 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2024-06-27 16:55:20,622 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:55:20,727 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 16:55:20,727 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-27 16:55:20,728 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-06-27 16:55:20,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1670923052] [2024-06-27 16:55:20,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1670923052] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:55:20,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:55:20,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 16:55:20,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469123155] [2024-06-27 16:55:20,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:55:20,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 16:55:20,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-06-27 16:55:20,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 16:55:20,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-06-27 16:55:20,732 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-06-27 16:55:20,733 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 26 transitions, 101 flow. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:55:20,733 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:55:20,733 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-06-27 16:55:20,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:55:20,954 INFO L124 PetriNetUnfolderBase]: 83/138 cut-off events. [2024-06-27 16:55:20,954 INFO L125 PetriNetUnfolderBase]: For 71/71 co-relation queries the response was YES. [2024-06-27 16:55:20,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 438 conditions, 138 events. 83/138 cut-off events. For 71/71 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 360 event pairs, 6 based on Foata normal form. 5/127 useless extension candidates. Maximal degree in co-relation 144. Up to 111 conditions per place. [2024-06-27 16:55:20,958 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 22 selfloop transitions, 4 changer transitions 9/38 dead transitions. [2024-06-27 16:55:20,959 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 38 transitions, 211 flow [2024-06-27 16:55:20,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 16:55:20,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 16:55:20,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 55 transitions. [2024-06-27 16:55:20,963 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55 [2024-06-27 16:55:20,963 INFO L175 Difference]: Start difference. First operand has 24 places, 26 transitions, 101 flow. Second operand 5 states and 55 transitions. [2024-06-27 16:55:20,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 38 transitions, 211 flow [2024-06-27 16:55:20,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 38 transitions, 207 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-27 16:55:20,965 INFO L231 Difference]: Finished difference. Result has 29 places, 26 transitions, 112 flow [2024-06-27 16:55:20,965 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=97, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=112, PETRI_PLACES=29, PETRI_TRANSITIONS=26} [2024-06-27 16:55:20,969 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 8 predicate places. [2024-06-27 16:55:20,973 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 26 transitions, 112 flow [2024-06-27 16:55:20,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:55:20,974 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:55:20,974 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:55:20,980 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2024-06-27 16:55:21,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-27 16:55:21,175 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:55:21,175 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:55:21,175 INFO L85 PathProgramCache]: Analyzing trace with hash 384126150, now seen corresponding path program 1 times [2024-06-27 16:55:21,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-06-27 16:55:21,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1648623176] [2024-06-27 16:55:21,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:55:21,176 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-27 16:55:21,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-06-27 16:55:21,177 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-06-27 16:55:21,178 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2024-06-27 16:55:21,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:55:21,290 INFO L262 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2024-06-27 16:55:21,291 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:55:21,367 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 16:55:21,367 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-27 16:55:21,367 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-06-27 16:55:21,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1648623176] [2024-06-27 16:55:21,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1648623176] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:55:21,368 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:55:21,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 16:55:21,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666555897] [2024-06-27 16:55:21,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:55:21,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 16:55:21,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-06-27 16:55:21,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 16:55:21,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 16:55:21,370 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-06-27 16:55:21,370 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 26 transitions, 112 flow. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:55:21,370 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:55:21,370 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-06-27 16:55:21,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:55:21,543 INFO L124 PetriNetUnfolderBase]: 92/160 cut-off events. [2024-06-27 16:55:21,544 INFO L125 PetriNetUnfolderBase]: For 192/192 co-relation queries the response was YES. [2024-06-27 16:55:21,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 542 conditions, 160 events. 92/160 cut-off events. For 192/192 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 418 event pairs, 28 based on Foata normal form. 7/163 useless extension candidates. Maximal degree in co-relation 239. Up to 117 conditions per place. [2024-06-27 16:55:21,546 INFO L140 encePairwiseOnDemand]: 16/20 looper letters, 36 selfloop transitions, 3 changer transitions 0/42 dead transitions. [2024-06-27 16:55:21,546 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 42 transitions, 260 flow [2024-06-27 16:55:21,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 16:55:21,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 16:55:21,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 47 transitions. [2024-06-27 16:55:21,547 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5875 [2024-06-27 16:55:21,548 INFO L175 Difference]: Start difference. First operand has 29 places, 26 transitions, 112 flow. Second operand 4 states and 47 transitions. [2024-06-27 16:55:21,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 42 transitions, 260 flow [2024-06-27 16:55:21,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 42 transitions, 239 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-27 16:55:21,550 INFO L231 Difference]: Finished difference. Result has 29 places, 28 transitions, 126 flow [2024-06-27 16:55:21,550 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=99, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=126, PETRI_PLACES=29, PETRI_TRANSITIONS=28} [2024-06-27 16:55:21,551 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 8 predicate places. [2024-06-27 16:55:21,551 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 28 transitions, 126 flow [2024-06-27 16:55:21,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:55:21,552 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:55:21,552 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:55:21,564 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2024-06-27 16:55:21,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-27 16:55:21,757 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:55:21,757 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:55:21,757 INFO L85 PathProgramCache]: Analyzing trace with hash 1680396075, now seen corresponding path program 2 times [2024-06-27 16:55:21,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-06-27 16:55:21,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [935812409] [2024-06-27 16:55:21,758 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 16:55:21,758 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-27 16:55:21,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-06-27 16:55:21,759 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-06-27 16:55:21,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2024-06-27 16:55:21,909 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 16:55:21,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:55:21,914 INFO L262 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 8 conjunts are in the unsatisfiable core [2024-06-27 16:55:21,916 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:55:22,029 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 16:55:22,029 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:55:22,152 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 16:55:22,152 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-06-27 16:55:22,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [935812409] [2024-06-27 16:55:22,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [935812409] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:55:22,153 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-06-27 16:55:22,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2024-06-27 16:55:22,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744025322] [2024-06-27 16:55:22,153 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-06-27 16:55:22,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 16:55:22,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-06-27 16:55:22,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 16:55:22,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-06-27 16:55:22,155 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-06-27 16:55:22,155 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 28 transitions, 126 flow. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:55:22,155 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:55:22,155 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-06-27 16:55:22,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:55:22,634 INFO L124 PetriNetUnfolderBase]: 105/198 cut-off events. [2024-06-27 16:55:22,634 INFO L125 PetriNetUnfolderBase]: For 209/209 co-relation queries the response was YES. [2024-06-27 16:55:22,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 658 conditions, 198 events. 105/198 cut-off events. For 209/209 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 594 event pairs, 0 based on Foata normal form. 20/217 useless extension candidates. Maximal degree in co-relation 581. Up to 79 conditions per place. [2024-06-27 16:55:22,637 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 38 selfloop transitions, 19 changer transitions 1/61 dead transitions. [2024-06-27 16:55:22,637 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 61 transitions, 371 flow [2024-06-27 16:55:22,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 16:55:22,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 16:55:22,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 96 transitions. [2024-06-27 16:55:22,639 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2024-06-27 16:55:22,639 INFO L175 Difference]: Start difference. First operand has 29 places, 28 transitions, 126 flow. Second operand 9 states and 96 transitions. [2024-06-27 16:55:22,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 61 transitions, 371 flow [2024-06-27 16:55:22,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 61 transitions, 367 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-06-27 16:55:22,642 INFO L231 Difference]: Finished difference. Result has 42 places, 39 transitions, 269 flow [2024-06-27 16:55:22,642 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=269, PETRI_PLACES=42, PETRI_TRANSITIONS=39} [2024-06-27 16:55:22,643 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 21 predicate places. [2024-06-27 16:55:22,643 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 39 transitions, 269 flow [2024-06-27 16:55:22,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:55:22,644 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:55:22,644 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:55:22,649 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Ended with exit code 0 [2024-06-27 16:55:22,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-27 16:55:22,848 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:55:22,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:55:22,849 INFO L85 PathProgramCache]: Analyzing trace with hash 1198687578, now seen corresponding path program 1 times [2024-06-27 16:55:22,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-06-27 16:55:22,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [548599121] [2024-06-27 16:55:22,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:55:22,850 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-27 16:55:22,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-06-27 16:55:22,851 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-06-27 16:55:22,856 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2024-06-27 16:55:22,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:55:22,970 INFO L262 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 9 conjunts are in the unsatisfiable core [2024-06-27 16:55:22,972 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:55:23,125 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 16:55:23,125 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:55:23,220 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 16:55:23,220 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-06-27 16:55:23,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [548599121] [2024-06-27 16:55:23,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [548599121] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:55:23,221 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-06-27 16:55:23,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2024-06-27 16:55:23,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47164982] [2024-06-27 16:55:23,221 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-06-27 16:55:23,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 16:55:23,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-06-27 16:55:23,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 16:55:23,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 16:55:23,222 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-06-27 16:55:23,223 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 39 transitions, 269 flow. Second operand has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:55:23,223 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:55:23,223 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-06-27 16:55:23,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:55:23,661 INFO L124 PetriNetUnfolderBase]: 215/398 cut-off events. [2024-06-27 16:55:23,661 INFO L125 PetriNetUnfolderBase]: For 1479/1479 co-relation queries the response was YES. [2024-06-27 16:55:23,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1786 conditions, 398 events. 215/398 cut-off events. For 1479/1479 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1494 event pairs, 64 based on Foata normal form. 20/417 useless extension candidates. Maximal degree in co-relation 1230. Up to 172 conditions per place. [2024-06-27 16:55:23,666 INFO L140 encePairwiseOnDemand]: 15/20 looper letters, 77 selfloop transitions, 16 changer transitions 0/96 dead transitions. [2024-06-27 16:55:23,666 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 96 transitions, 864 flow [2024-06-27 16:55:23,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 16:55:23,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 16:55:23,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 87 transitions. [2024-06-27 16:55:23,668 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.54375 [2024-06-27 16:55:23,668 INFO L175 Difference]: Start difference. First operand has 42 places, 39 transitions, 269 flow. Second operand 8 states and 87 transitions. [2024-06-27 16:55:23,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 96 transitions, 864 flow [2024-06-27 16:55:23,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 96 transitions, 803 flow, removed 25 selfloop flow, removed 3 redundant places. [2024-06-27 16:55:23,675 INFO L231 Difference]: Finished difference. Result has 47 places, 53 transitions, 417 flow [2024-06-27 16:55:23,676 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=243, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=417, PETRI_PLACES=47, PETRI_TRANSITIONS=53} [2024-06-27 16:55:23,676 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 26 predicate places. [2024-06-27 16:55:23,677 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 53 transitions, 417 flow [2024-06-27 16:55:23,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:55:23,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:55:23,677 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:55:23,687 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2024-06-27 16:55:23,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-27 16:55:23,888 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:55:23,888 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:55:23,888 INFO L85 PathProgramCache]: Analyzing trace with hash 1035631711, now seen corresponding path program 1 times [2024-06-27 16:55:23,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-06-27 16:55:23,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [80716068] [2024-06-27 16:55:23,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:55:23,889 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-06-27 16:55:23,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-06-27 16:55:23,890 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-06-27 16:55:23,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2024-06-27 16:55:24,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:55:24,218 INFO L262 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 9 conjunts are in the unsatisfiable core [2024-06-27 16:55:24,221 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:55:24,593 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:55:24,601 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 370 treesize of output 128 [2024-06-27 16:55:24,720 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 16:55:24,720 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:55:27,499 INFO L349 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2024-06-27 16:55:27,500 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 611 treesize of output 309 [2024-06-27 16:56:59,906 WARN L293 SmtUtils]: Spent 1.12m on a formula simplification. DAG size of input: 613 DAG size of output: 613 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) Killed by 15