./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/bench-exp1x3.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 551b0097 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/bench-exp1x3.wvr.c -s /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-jdk21/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 52eeb5cce5645e9dacc261319eae3d665b5cc432ff3ddd2ef39502a44996e68d --- Real Ultimate output --- This is Ultimate 0.3.0-?-551b009-m [2025-01-09 16:36:39,700 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-01-09 16:36:39,736 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-01-09 16:36:39,742 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-01-09 16:36:39,742 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-01-09 16:36:39,754 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-01-09 16:36:39,755 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-01-09 16:36:39,755 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-01-09 16:36:39,755 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-01-09 16:36:39,755 INFO L153 SettingsManager]: * Use memory slicer=true [2025-01-09 16:36:39,755 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-01-09 16:36:39,755 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-01-09 16:36:39,756 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-01-09 16:36:39,756 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-01-09 16:36:39,756 INFO L153 SettingsManager]: * Use SBE=true [2025-01-09 16:36:39,756 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-01-09 16:36:39,756 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-01-09 16:36:39,756 INFO L153 SettingsManager]: * sizeof long=4 [2025-01-09 16:36:39,756 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-01-09 16:36:39,756 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-01-09 16:36:39,756 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-01-09 16:36:39,756 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-01-09 16:36:39,757 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-01-09 16:36:39,757 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-01-09 16:36:39,757 INFO L153 SettingsManager]: * sizeof long double=12 [2025-01-09 16:36:39,757 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-01-09 16:36:39,757 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-01-09 16:36:39,757 INFO L153 SettingsManager]: * Use constant arrays=true [2025-01-09 16:36:39,757 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-01-09 16:36:39,757 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-01-09 16:36:39,757 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-01-09 16:36:39,757 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-01-09 16:36:39,757 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-09 16:36:39,757 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-01-09 16:36:39,757 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-01-09 16:36:39,758 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-01-09 16:36:39,758 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-01-09 16:36:39,758 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-09 16:36:39,758 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-01-09 16:36:39,758 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-01-09 16:36:39,758 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-01-09 16:36:39,758 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-01-09 16:36:39,758 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-01-09 16:36:39,758 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-01-09 16:36:39,758 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-01-09 16:36:39,758 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-01-09 16:36:39,758 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-01-09 16:36:39,758 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-01-09 16:36:39,759 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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-jdk21/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 -> 52eeb5cce5645e9dacc261319eae3d665b5cc432ff3ddd2ef39502a44996e68d [2025-01-09 16:36:39,969 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-01-09 16:36:39,978 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-01-09 16:36:39,979 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-01-09 16:36:39,980 INFO L270 PluginConnector]: Initializing CDTParser... [2025-01-09 16:36:39,980 INFO L274 PluginConnector]: CDTParser initialized [2025-01-09 16:36:39,982 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/bench-exp1x3.wvr.c [2025-01-09 16:36:41,070 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/fe0e3871e/78ef76528788404c862af03e060bd80e/FLAGfc222c038 [2025-01-09 16:36:41,346 INFO L384 CDTParser]: Found 1 translation units. [2025-01-09 16:36:41,346 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/weaver/bench-exp1x3.wvr.c [2025-01-09 16:36:41,352 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/fe0e3871e/78ef76528788404c862af03e060bd80e/FLAGfc222c038 [2025-01-09 16:36:41,653 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/fe0e3871e/78ef76528788404c862af03e060bd80e [2025-01-09 16:36:41,655 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-01-09 16:36:41,657 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-01-09 16:36:41,658 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-01-09 16:36:41,658 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-01-09 16:36:41,662 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-01-09 16:36:41,662 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 04:36:41" (1/1) ... [2025-01-09 16:36:41,663 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ed5a2e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:36:41, skipping insertion in model container [2025-01-09 16:36:41,663 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 04:36:41" (1/1) ... [2025-01-09 16:36:41,674 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-01-09 16:36:41,778 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/weaver/bench-exp1x3.wvr.c[1875,1888] [2025-01-09 16:36:41,783 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-01-09 16:36:41,789 INFO L200 MainTranslator]: Completed pre-run [2025-01-09 16:36:41,805 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/weaver/bench-exp1x3.wvr.c[1875,1888] [2025-01-09 16:36:41,809 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-01-09 16:36:41,820 INFO L204 MainTranslator]: Completed translation [2025-01-09 16:36:41,825 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:36:41 WrapperNode [2025-01-09 16:36:41,825 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-01-09 16:36:41,826 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-01-09 16:36:41,829 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-01-09 16:36:41,829 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-01-09 16:36:41,833 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:36:41" (1/1) ... [2025-01-09 16:36:41,841 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:36:41" (1/1) ... [2025-01-09 16:36:41,850 INFO L138 Inliner]: procedures = 17, calls = 10, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 47 [2025-01-09 16:36:41,851 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-01-09 16:36:41,851 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-01-09 16:36:41,851 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-01-09 16:36:41,852 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-01-09 16:36:41,856 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:36:41" (1/1) ... [2025-01-09 16:36:41,856 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:36:41" (1/1) ... [2025-01-09 16:36:41,858 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:36:41" (1/1) ... [2025-01-09 16:36:41,869 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2025-01-09 16:36:41,870 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:36:41" (1/1) ... [2025-01-09 16:36:41,870 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:36:41" (1/1) ... [2025-01-09 16:36:41,872 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:36:41" (1/1) ... [2025-01-09 16:36:41,874 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:36:41" (1/1) ... [2025-01-09 16:36:41,876 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:36:41" (1/1) ... [2025-01-09 16:36:41,878 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:36:41" (1/1) ... [2025-01-09 16:36:41,878 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:36:41" (1/1) ... [2025-01-09 16:36:41,882 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-01-09 16:36:41,883 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2025-01-09 16:36:41,883 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2025-01-09 16:36:41,883 INFO L274 PluginConnector]: RCFGBuilder initialized [2025-01-09 16:36:41,883 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:36:41" (1/1) ... [2025-01-09 16:36:41,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-09 16:36:41,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 16:36:41,910 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-01-09 16:36:41,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-01-09 16:36:41,937 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-01-09 16:36:41,937 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-01-09 16:36:41,937 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-01-09 16:36:41,937 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-01-09 16:36:41,938 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-01-09 16:36:41,938 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-01-09 16:36:41,938 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-01-09 16:36:41,938 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-01-09 16:36:41,939 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-01-09 16:36:42,019 INFO L234 CfgBuilder]: Building ICFG [2025-01-09 16:36:42,024 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2025-01-09 16:36:42,154 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-01-09 16:36:42,155 INFO L283 CfgBuilder]: Performing block encoding [2025-01-09 16:36:42,255 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-01-09 16:36:42,255 INFO L312 CfgBuilder]: Removed 0 assume(true) statements. [2025-01-09 16:36:42,256 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 04:36:42 BoogieIcfgContainer [2025-01-09 16:36:42,258 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2025-01-09 16:36:42,260 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-01-09 16:36:42,260 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-01-09 16:36:42,263 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-01-09 16:36:42,263 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.01 04:36:41" (1/3) ... [2025-01-09 16:36:42,264 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a8e6a58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.01 04:36:42, skipping insertion in model container [2025-01-09 16:36:42,264 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:36:41" (2/3) ... [2025-01-09 16:36:42,264 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a8e6a58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.01 04:36:42, skipping insertion in model container [2025-01-09 16:36:42,264 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 04:36:42" (3/3) ... [2025-01-09 16:36:42,265 INFO L128 eAbstractionObserver]: Analyzing ICFG bench-exp1x3.wvr.c [2025-01-09 16:36:42,274 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-01-09 16:36:42,276 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG bench-exp1x3.wvr.c that has 3 procedures, 17 locations, 1 initial locations, 2 loop locations, and 1 error locations. [2025-01-09 16:36:42,276 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-01-09 16:36:42,314 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2025-01-09 16:36:42,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 23 places, 18 transitions, 50 flow [2025-01-09 16:36:42,365 INFO L124 PetriNetUnfolderBase]: 2/16 cut-off events. [2025-01-09 16:36:42,367 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-01-09 16:36:42,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25 conditions, 16 events. 2/16 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 11 event pairs, 0 based on Foata normal form. 0/13 useless extension candidates. Maximal degree in co-relation 11. Up to 2 conditions per place. [2025-01-09 16:36:42,372 INFO L82 GeneralOperation]: Start removeDead. Operand has 23 places, 18 transitions, 50 flow [2025-01-09 16:36:42,374 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 20 places, 15 transitions, 42 flow [2025-01-09 16:36:42,381 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-01-09 16:36:42,389 INFO L333 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, 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;@282652fb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-01-09 16:36:42,389 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2025-01-09 16:36:42,396 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-01-09 16:36:42,396 INFO L124 PetriNetUnfolderBase]: 2/14 cut-off events. [2025-01-09 16:36:42,397 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-01-09 16:36:42,397 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:36:42,397 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:36:42,398 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-01-09 16:36:42,402 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:36:42,402 INFO L85 PathProgramCache]: Analyzing trace with hash -815332485, now seen corresponding path program 1 times [2025-01-09 16:36:42,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:36:42,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130232531] [2025-01-09 16:36:42,408 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 16:36:42,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:36:42,462 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-01-09 16:36:42,480 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-01-09 16:36:42,481 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 16:36:42,481 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:36:42,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:36:42,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:36:42,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130232531] [2025-01-09 16:36:42,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130232531] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 16:36:42,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 16:36:42,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-01-09 16:36:42,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395873965] [2025-01-09 16:36:42,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 16:36:42,669 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-01-09 16:36:42,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:36:42,684 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-01-09 16:36:42,685 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-01-09 16:36:42,685 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 18 [2025-01-09 16:36:42,687 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 15 transitions, 42 flow. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:36:42,687 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:36:42,687 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 18 [2025-01-09 16:36:42,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:36:42,737 INFO L124 PetriNetUnfolderBase]: 59/104 cut-off events. [2025-01-09 16:36:42,737 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2025-01-09 16:36:42,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 225 conditions, 104 events. 59/104 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 282 event pairs, 8 based on Foata normal form. 1/68 useless extension candidates. Maximal degree in co-relation 179. Up to 77 conditions per place. [2025-01-09 16:36:42,739 INFO L140 encePairwiseOnDemand]: 14/18 looper letters, 17 selfloop transitions, 3 changer transitions 1/24 dead transitions. [2025-01-09 16:36:42,739 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 24 transitions, 111 flow [2025-01-09 16:36:42,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-01-09 16:36:42,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-01-09 16:36:42,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 37 transitions. [2025-01-09 16:36:42,748 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6851851851851852 [2025-01-09 16:36:42,749 INFO L175 Difference]: Start difference. First operand has 20 places, 15 transitions, 42 flow. Second operand 3 states and 37 transitions. [2025-01-09 16:36:42,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 24 transitions, 111 flow [2025-01-09 16:36:42,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 24 transitions, 97 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-01-09 16:36:42,754 INFO L231 Difference]: Finished difference. Result has 19 places, 17 transitions, 53 flow [2025-01-09 16:36:42,756 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=53, PETRI_PLACES=19, PETRI_TRANSITIONS=17} [2025-01-09 16:36:42,758 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, -1 predicate places. [2025-01-09 16:36:42,758 INFO L471 AbstractCegarLoop]: Abstraction has has 19 places, 17 transitions, 53 flow [2025-01-09 16:36:42,758 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:36:42,758 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:36:42,758 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:36:42,758 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-01-09 16:36:42,759 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-01-09 16:36:42,759 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:36:42,759 INFO L85 PathProgramCache]: Analyzing trace with hash 493417353, now seen corresponding path program 1 times [2025-01-09 16:36:42,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:36:42,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140177219] [2025-01-09 16:36:42,759 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 16:36:42,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:36:42,765 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-01-09 16:36:42,772 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-01-09 16:36:42,773 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 16:36:42,773 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:36:42,844 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:36:42,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:36:42,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140177219] [2025-01-09 16:36:42,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140177219] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 16:36:42,845 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 16:36:42,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-01-09 16:36:42,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858948836] [2025-01-09 16:36:42,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 16:36:42,846 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-01-09 16:36:42,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:36:42,846 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-01-09 16:36:42,846 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-01-09 16:36:42,847 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 18 [2025-01-09 16:36:42,847 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 17 transitions, 53 flow. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:36:42,847 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:36:42,847 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 18 [2025-01-09 16:36:42,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:36:42,932 INFO L124 PetriNetUnfolderBase]: 56/100 cut-off events. [2025-01-09 16:36:42,932 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2025-01-09 16:36:42,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 248 conditions, 100 events. 56/100 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 247 event pairs, 1 based on Foata normal form. 3/101 useless extension candidates. Maximal degree in co-relation 72. Up to 46 conditions per place. [2025-01-09 16:36:42,933 INFO L140 encePairwiseOnDemand]: 13/18 looper letters, 18 selfloop transitions, 6 changer transitions 7/34 dead transitions. [2025-01-09 16:36:42,933 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 34 transitions, 159 flow [2025-01-09 16:36:42,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-01-09 16:36:42,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-01-09 16:36:42,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 57 transitions. [2025-01-09 16:36:42,934 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6333333333333333 [2025-01-09 16:36:42,934 INFO L175 Difference]: Start difference. First operand has 19 places, 17 transitions, 53 flow. Second operand 5 states and 57 transitions. [2025-01-09 16:36:42,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 34 transitions, 159 flow [2025-01-09 16:36:42,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 34 transitions, 155 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-01-09 16:36:42,935 INFO L231 Difference]: Finished difference. Result has 23 places, 19 transitions, 74 flow [2025-01-09 16:36:42,935 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=74, PETRI_PLACES=23, PETRI_TRANSITIONS=19} [2025-01-09 16:36:42,935 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 3 predicate places. [2025-01-09 16:36:42,936 INFO L471 AbstractCegarLoop]: Abstraction has has 23 places, 19 transitions, 74 flow [2025-01-09 16:36:42,936 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:36:42,936 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:36:42,936 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:36:42,936 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-01-09 16:36:42,936 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-01-09 16:36:42,936 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:36:42,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1132386005, now seen corresponding path program 1 times [2025-01-09 16:36:42,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:36:42,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245314442] [2025-01-09 16:36:42,936 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 16:36:42,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:36:42,941 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-01-09 16:36:42,947 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-01-09 16:36:42,947 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 16:36:42,947 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:36:43,029 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:36:43,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:36:43,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245314442] [2025-01-09 16:36:43,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245314442] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 16:36:43,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147490519] [2025-01-09 16:36:43,030 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 16:36:43,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:36:43,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 16:36:43,034 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 16:36:43,035 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-01-09 16:36:43,063 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-01-09 16:36:43,073 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-01-09 16:36:43,073 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 16:36:43,073 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:36:43,074 INFO L256 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-01-09 16:36:43,077 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 16:36:43,177 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:36:43,177 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 16:36:43,221 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:36:43,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147490519] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 16:36:43,221 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 16:36:43,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2025-01-09 16:36:43,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600842565] [2025-01-09 16:36:43,221 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 16:36:43,222 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-01-09 16:36:43,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:36:43,222 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-01-09 16:36:43,222 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-01-09 16:36:43,222 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 18 [2025-01-09 16:36:43,222 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 19 transitions, 74 flow. Second operand has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:36:43,222 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:36:43,222 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 18 [2025-01-09 16:36:43,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:36:43,303 INFO L124 PetriNetUnfolderBase]: 47/94 cut-off events. [2025-01-09 16:36:43,304 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2025-01-09 16:36:43,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 272 conditions, 94 events. 47/94 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 229 event pairs, 5 based on Foata normal form. 5/97 useless extension candidates. Maximal degree in co-relation 83. Up to 48 conditions per place. [2025-01-09 16:36:43,305 INFO L140 encePairwiseOnDemand]: 13/18 looper letters, 23 selfloop transitions, 7 changer transitions 3/36 dead transitions. [2025-01-09 16:36:43,305 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 36 transitions, 192 flow [2025-01-09 16:36:43,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-01-09 16:36:43,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-01-09 16:36:43,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 59 transitions. [2025-01-09 16:36:43,306 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6555555555555556 [2025-01-09 16:36:43,306 INFO L175 Difference]: Start difference. First operand has 23 places, 19 transitions, 74 flow. Second operand 5 states and 59 transitions. [2025-01-09 16:36:43,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 36 transitions, 192 flow [2025-01-09 16:36:43,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 36 transitions, 188 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-01-09 16:36:43,307 INFO L231 Difference]: Finished difference. Result has 28 places, 22 transitions, 110 flow [2025-01-09 16:36:43,307 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=110, PETRI_PLACES=28, PETRI_TRANSITIONS=22} [2025-01-09 16:36:43,308 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 8 predicate places. [2025-01-09 16:36:43,308 INFO L471 AbstractCegarLoop]: Abstraction has has 28 places, 22 transitions, 110 flow [2025-01-09 16:36:43,308 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:36:43,308 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:36:43,308 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:36:43,314 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-01-09 16:36:43,513 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:36:43,513 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-01-09 16:36:43,514 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:36:43,514 INFO L85 PathProgramCache]: Analyzing trace with hash -1594110567, now seen corresponding path program 2 times [2025-01-09 16:36:43,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:36:43,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401992357] [2025-01-09 16:36:43,514 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 16:36:43,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:36:43,519 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 14 statements into 2 equivalence classes. [2025-01-09 16:36:43,530 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 14 of 14 statements. [2025-01-09 16:36:43,530 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 16:36:43,530 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:36:43,580 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:36:43,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:36:43,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401992357] [2025-01-09 16:36:43,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401992357] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 16:36:43,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 16:36:43,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-01-09 16:36:43,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468055817] [2025-01-09 16:36:43,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 16:36:43,580 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-01-09 16:36:43,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:36:43,581 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-01-09 16:36:43,584 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-01-09 16:36:43,584 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 18 [2025-01-09 16:36:43,584 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 22 transitions, 110 flow. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:36:43,585 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:36:43,585 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 18 [2025-01-09 16:36:43,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:36:43,638 INFO L124 PetriNetUnfolderBase]: 43/82 cut-off events. [2025-01-09 16:36:43,638 INFO L125 PetriNetUnfolderBase]: For 82/82 co-relation queries the response was YES. [2025-01-09 16:36:43,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 298 conditions, 82 events. 43/82 cut-off events. For 82/82 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 181 event pairs, 0 based on Foata normal form. 2/82 useless extension candidates. Maximal degree in co-relation 169. Up to 36 conditions per place. [2025-01-09 16:36:43,639 INFO L140 encePairwiseOnDemand]: 13/18 looper letters, 20 selfloop transitions, 5 changer transitions 5/33 dead transitions. [2025-01-09 16:36:43,639 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 33 transitions, 204 flow [2025-01-09 16:36:43,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-01-09 16:36:43,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-01-09 16:36:43,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 53 transitions. [2025-01-09 16:36:43,640 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5888888888888889 [2025-01-09 16:36:43,640 INFO L175 Difference]: Start difference. First operand has 28 places, 22 transitions, 110 flow. Second operand 5 states and 53 transitions. [2025-01-09 16:36:43,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 33 transitions, 204 flow [2025-01-09 16:36:43,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 33 transitions, 197 flow, removed 2 selfloop flow, removed 1 redundant places. [2025-01-09 16:36:43,641 INFO L231 Difference]: Finished difference. Result has 31 places, 20 transitions, 100 flow [2025-01-09 16:36:43,641 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=95, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=100, PETRI_PLACES=31, PETRI_TRANSITIONS=20} [2025-01-09 16:36:43,642 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 11 predicate places. [2025-01-09 16:36:43,642 INFO L471 AbstractCegarLoop]: Abstraction has has 31 places, 20 transitions, 100 flow [2025-01-09 16:36:43,642 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:36:43,642 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:36:43,642 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:36:43,642 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-01-09 16:36:43,642 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-01-09 16:36:43,643 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:36:43,643 INFO L85 PathProgramCache]: Analyzing trace with hash -1837298883, now seen corresponding path program 2 times [2025-01-09 16:36:43,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:36:43,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145537369] [2025-01-09 16:36:43,643 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 16:36:43,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:36:43,646 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 14 statements into 2 equivalence classes. [2025-01-09 16:36:43,650 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 14 of 14 statements. [2025-01-09 16:36:43,650 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 16:36:43,650 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:36:43,696 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:36:43,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:36:43,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145537369] [2025-01-09 16:36:43,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145537369] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 16:36:43,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825906460] [2025-01-09 16:36:43,696 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 16:36:43,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:36:43,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 16:36:43,700 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 16:36:43,701 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-01-09 16:36:43,725 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 14 statements into 2 equivalence classes. [2025-01-09 16:36:43,734 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 14 of 14 statements. [2025-01-09 16:36:43,734 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 16:36:43,734 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:36:43,735 INFO L256 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-01-09 16:36:43,735 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 16:36:43,854 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:36:43,854 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 16:36:43,887 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:36:43,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825906460] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 16:36:43,887 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 16:36:43,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2025-01-09 16:36:43,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686023767] [2025-01-09 16:36:43,888 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 16:36:43,888 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-01-09 16:36:43,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:36:43,888 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-01-09 16:36:43,888 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-01-09 16:36:43,888 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 18 [2025-01-09 16:36:43,888 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 20 transitions, 100 flow. Second operand has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:36:43,888 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:36:43,888 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 18 [2025-01-09 16:36:43,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:36:43,953 INFO L124 PetriNetUnfolderBase]: 37/70 cut-off events. [2025-01-09 16:36:43,953 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2025-01-09 16:36:43,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 266 conditions, 70 events. 37/70 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 134 event pairs, 2 based on Foata normal form. 4/73 useless extension candidates. Maximal degree in co-relation 129. Up to 55 conditions per place. [2025-01-09 16:36:43,954 INFO L140 encePairwiseOnDemand]: 13/18 looper letters, 20 selfloop transitions, 6 changer transitions 0/29 dead transitions. [2025-01-09 16:36:43,954 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 29 transitions, 185 flow [2025-01-09 16:36:43,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-01-09 16:36:43,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-01-09 16:36:43,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 50 transitions. [2025-01-09 16:36:43,955 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2025-01-09 16:36:43,955 INFO L175 Difference]: Start difference. First operand has 31 places, 20 transitions, 100 flow. Second operand 5 states and 50 transitions. [2025-01-09 16:36:43,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 29 transitions, 185 flow [2025-01-09 16:36:43,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 29 transitions, 175 flow, removed 2 selfloop flow, removed 2 redundant places. [2025-01-09 16:36:43,956 INFO L231 Difference]: Finished difference. Result has 33 places, 23 transitions, 131 flow [2025-01-09 16:36:43,956 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=131, PETRI_PLACES=33, PETRI_TRANSITIONS=23} [2025-01-09 16:36:43,956 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 13 predicate places. [2025-01-09 16:36:43,957 INFO L471 AbstractCegarLoop]: Abstraction has has 33 places, 23 transitions, 131 flow [2025-01-09 16:36:43,957 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:36:43,957 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:36:43,957 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:36:43,963 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-01-09 16:36:44,157 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:36:44,157 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-01-09 16:36:44,158 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:36:44,158 INFO L85 PathProgramCache]: Analyzing trace with hash -1753788441, now seen corresponding path program 1 times [2025-01-09 16:36:44,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:36:44,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407431092] [2025-01-09 16:36:44,158 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 16:36:44,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:36:44,162 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-01-09 16:36:44,173 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-01-09 16:36:44,174 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 16:36:44,174 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:36:44,429 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:36:44,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:36:44,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407431092] [2025-01-09 16:36:44,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407431092] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 16:36:44,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658671973] [2025-01-09 16:36:44,429 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 16:36:44,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:36:44,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 16:36:44,431 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 16:36:44,433 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-01-09 16:36:44,455 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-01-09 16:36:44,499 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-01-09 16:36:44,499 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 16:36:44,499 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:36:44,501 INFO L256 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-01-09 16:36:44,502 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 16:37:05,279 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:37:05,280 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 16:37:05,793 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:37:05,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658671973] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 16:37:05,793 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 16:37:05,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2025-01-09 16:37:05,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776834201] [2025-01-09 16:37:05,794 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 16:37:05,794 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-01-09 16:37:05,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:37:05,794 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-01-09 16:37:05,794 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=147, Unknown=2, NotChecked=0, Total=210 [2025-01-09 16:37:05,795 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 18 [2025-01-09 16:37:05,795 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 23 transitions, 131 flow. Second operand has 15 states, 15 states have (on average 6.933333333333334) internal successors, (104), 15 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:37:05,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:37:05,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 18 [2025-01-09 16:37:05,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:37:10,951 INFO L124 PetriNetUnfolderBase]: 125/239 cut-off events. [2025-01-09 16:37:10,951 INFO L125 PetriNetUnfolderBase]: For 460/460 co-relation queries the response was YES. [2025-01-09 16:37:10,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 973 conditions, 239 events. 125/239 cut-off events. For 460/460 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 826 event pairs, 6 based on Foata normal form. 6/244 useless extension candidates. Maximal degree in co-relation 548. Up to 85 conditions per place. [2025-01-09 16:37:10,953 INFO L140 encePairwiseOnDemand]: 12/18 looper letters, 49 selfloop transitions, 25 changer transitions 14/91 dead transitions. [2025-01-09 16:37:10,953 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 91 transitions, 651 flow [2025-01-09 16:37:10,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-01-09 16:37:10,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2025-01-09 16:37:10,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 148 transitions. [2025-01-09 16:37:10,954 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6324786324786325 [2025-01-09 16:37:10,954 INFO L175 Difference]: Start difference. First operand has 33 places, 23 transitions, 131 flow. Second operand 13 states and 148 transitions. [2025-01-09 16:37:10,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 91 transitions, 651 flow [2025-01-09 16:37:10,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 91 transitions, 636 flow, removed 6 selfloop flow, removed 1 redundant places. [2025-01-09 16:37:10,957 INFO L231 Difference]: Finished difference. Result has 51 places, 44 transitions, 383 flow [2025-01-09 16:37:10,958 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=383, PETRI_PLACES=51, PETRI_TRANSITIONS=44} [2025-01-09 16:37:10,958 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 31 predicate places. [2025-01-09 16:37:10,958 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 44 transitions, 383 flow [2025-01-09 16:37:10,958 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.933333333333334) internal successors, (104), 15 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:37:10,958 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:37:10,958 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:37:10,965 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-01-09 16:37:11,163 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:37:11,163 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-01-09 16:37:11,163 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:37:11,163 INFO L85 PathProgramCache]: Analyzing trace with hash 635397757, now seen corresponding path program 2 times [2025-01-09 16:37:11,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:37:11,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646161486] [2025-01-09 16:37:11,163 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 16:37:11,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:37:11,169 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 15 statements into 2 equivalence classes. [2025-01-09 16:37:11,184 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-01-09 16:37:11,184 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 16:37:11,184 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:37:11,401 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:37:11,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:37:11,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646161486] [2025-01-09 16:37:11,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646161486] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 16:37:11,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261931901] [2025-01-09 16:37:11,403 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 16:37:11,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:37:11,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 16:37:11,406 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 16:37:11,411 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-01-09 16:37:11,434 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 15 statements into 2 equivalence classes. [2025-01-09 16:37:11,480 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-01-09 16:37:11,480 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 16:37:11,480 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:37:11,480 INFO L256 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-01-09 16:37:11,481 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 16:37:21,681 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:37:21,682 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 16:37:22,027 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:37:22,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261931901] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 16:37:22,028 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 16:37:22,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 12 [2025-01-09 16:37:22,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900428712] [2025-01-09 16:37:22,028 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 16:37:22,029 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-01-09 16:37:22,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:37:22,029 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-01-09 16:37:22,029 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2025-01-09 16:37:22,029 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 18 [2025-01-09 16:37:22,029 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 44 transitions, 383 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) [2025-01-09 16:37:22,029 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:37:22,029 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 18 [2025-01-09 16:37:22,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:37:26,901 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2025-01-09 16:37:36,611 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2025-01-09 16:37:39,416 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.21s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2025-01-09 16:37:43,439 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2025-01-09 16:37:44,439 INFO L124 PetriNetUnfolderBase]: 185/362 cut-off events. [2025-01-09 16:37:44,439 INFO L125 PetriNetUnfolderBase]: For 1802/1802 co-relation queries the response was YES. [2025-01-09 16:37:44,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1901 conditions, 362 events. 185/362 cut-off events. For 1802/1802 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 1501 event pairs, 14 based on Foata normal form. 4/365 useless extension candidates. Maximal degree in co-relation 1835. Up to 192 conditions per place. [2025-01-09 16:37:44,442 INFO L140 encePairwiseOnDemand]: 12/18 looper letters, 65 selfloop transitions, 26 changer transitions 11/105 dead transitions. [2025-01-09 16:37:44,442 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 105 transitions, 1015 flow [2025-01-09 16:37:44,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-01-09 16:37:44,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-01-09 16:37:44,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 137 transitions. [2025-01-09 16:37:44,443 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6342592592592593 [2025-01-09 16:37:44,443 INFO L175 Difference]: Start difference. First operand has 51 places, 44 transitions, 383 flow. Second operand 12 states and 137 transitions. [2025-01-09 16:37:44,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 105 transitions, 1015 flow [2025-01-09 16:37:44,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 105 transitions, 910 flow, removed 51 selfloop flow, removed 2 redundant places. [2025-01-09 16:37:44,449 INFO L231 Difference]: Finished difference. Result has 66 places, 63 transitions, 590 flow [2025-01-09 16:37:44,449 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=308, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=590, PETRI_PLACES=66, PETRI_TRANSITIONS=63} [2025-01-09 16:37:44,450 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 46 predicate places. [2025-01-09 16:37:44,450 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 63 transitions, 590 flow [2025-01-09 16:37:44,450 INFO L472 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) [2025-01-09 16:37:44,450 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:37:44,450 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:37:44,456 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-01-09 16:37:44,650 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2025-01-09 16:37:44,651 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-01-09 16:37:44,651 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:37:44,651 INFO L85 PathProgramCache]: Analyzing trace with hash -1399119433, now seen corresponding path program 3 times [2025-01-09 16:37:44,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:37:44,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124088282] [2025-01-09 16:37:44,652 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-09 16:37:44,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:37:44,655 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 16 statements into 2 equivalence classes. [2025-01-09 16:37:44,659 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-01-09 16:37:44,659 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-01-09 16:37:44,660 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:37:44,750 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:37:44,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:37:44,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124088282] [2025-01-09 16:37:44,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124088282] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 16:37:44,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755512166] [2025-01-09 16:37:44,750 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-09 16:37:44,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:37:44,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 16:37:44,752 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 16:37:44,754 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-01-09 16:37:44,777 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 16 statements into 2 equivalence classes. [2025-01-09 16:37:44,796 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-01-09 16:37:44,796 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-01-09 16:37:44,796 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:37:44,796 INFO L256 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-01-09 16:37:44,797 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 16:37:45,040 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:37:45,040 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 16:37:45,094 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:37:45,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755512166] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 16:37:45,094 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 16:37:45,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2025-01-09 16:37:45,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653995668] [2025-01-09 16:37:45,095 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 16:37:45,095 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-01-09 16:37:45,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:37:45,095 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-01-09 16:37:45,095 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2025-01-09 16:37:45,096 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 18 [2025-01-09 16:37:45,096 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 63 transitions, 590 flow. Second operand has 12 states, 12 states have (on average 7.416666666666667) internal successors, (89), 12 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:37:45,096 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:37:45,096 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 18 [2025-01-09 16:37:45,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:37:48,153 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.04s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2025-01-09 16:37:49,497 INFO L124 PetriNetUnfolderBase]: 238/473 cut-off events. [2025-01-09 16:37:49,497 INFO L125 PetriNetUnfolderBase]: For 3954/3954 co-relation queries the response was YES. [2025-01-09 16:37:49,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2668 conditions, 473 events. 238/473 cut-off events. For 3954/3954 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2141 event pairs, 3 based on Foata normal form. 16/488 useless extension candidates. Maximal degree in co-relation 2477. Up to 167 conditions per place. [2025-01-09 16:37:49,500 INFO L140 encePairwiseOnDemand]: 12/18 looper letters, 75 selfloop transitions, 30 changer transitions 18/126 dead transitions. [2025-01-09 16:37:49,500 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 126 transitions, 1386 flow [2025-01-09 16:37:49,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-01-09 16:37:49,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-01-09 16:37:49,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 119 transitions. [2025-01-09 16:37:49,501 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.601010101010101 [2025-01-09 16:37:49,501 INFO L175 Difference]: Start difference. First operand has 66 places, 63 transitions, 590 flow. Second operand 11 states and 119 transitions. [2025-01-09 16:37:49,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 126 transitions, 1386 flow [2025-01-09 16:37:49,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 126 transitions, 1239 flow, removed 72 selfloop flow, removed 1 redundant places. [2025-01-09 16:37:49,509 INFO L231 Difference]: Finished difference. Result has 80 places, 80 transitions, 735 flow [2025-01-09 16:37:49,509 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=487, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=735, PETRI_PLACES=80, PETRI_TRANSITIONS=80} [2025-01-09 16:37:49,509 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 60 predicate places. [2025-01-09 16:37:49,509 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 80 transitions, 735 flow [2025-01-09 16:37:49,510 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.416666666666667) internal successors, (89), 12 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:37:49,510 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:37:49,510 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:37:49,516 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-01-09 16:37:49,713 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:37:49,714 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-01-09 16:37:49,714 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:37:49,714 INFO L85 PathProgramCache]: Analyzing trace with hash -658166035, now seen corresponding path program 4 times [2025-01-09 16:37:49,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:37:49,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52322772] [2025-01-09 16:37:49,715 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-01-09 16:37:49,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:37:49,717 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 16 statements into 2 equivalence classes. [2025-01-09 16:37:49,721 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-01-09 16:37:49,721 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-01-09 16:37:49,721 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:37:49,792 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:37:49,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:37:49,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52322772] [2025-01-09 16:37:49,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52322772] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 16:37:49,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057025675] [2025-01-09 16:37:49,793 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-01-09 16:37:49,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:37:49,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 16:37:49,795 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 16:37:49,796 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-01-09 16:37:49,818 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 16 statements into 2 equivalence classes. [2025-01-09 16:37:49,830 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-01-09 16:37:49,830 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-01-09 16:37:49,830 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:37:49,830 INFO L256 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-01-09 16:37:49,831 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 16:37:51,797 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:37:51,798 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 16:37:51,855 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:37:51,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2057025675] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 16:37:51,856 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 16:37:51,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2025-01-09 16:37:51,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708094472] [2025-01-09 16:37:51,856 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 16:37:51,856 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-01-09 16:37:51,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:37:51,856 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-01-09 16:37:51,856 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2025-01-09 16:37:51,857 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 18 [2025-01-09 16:37:51,857 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 80 transitions, 735 flow. Second operand has 12 states, 12 states have (on average 7.416666666666667) internal successors, (89), 12 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:37:51,857 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:37:51,857 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 18 [2025-01-09 16:37:51,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:37:52,170 INFO L124 PetriNetUnfolderBase]: 219/435 cut-off events. [2025-01-09 16:37:52,170 INFO L125 PetriNetUnfolderBase]: For 3976/3976 co-relation queries the response was YES. [2025-01-09 16:37:52,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2503 conditions, 435 events. 219/435 cut-off events. For 3976/3976 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 1892 event pairs, 22 based on Foata normal form. 12/446 useless extension candidates. Maximal degree in co-relation 2394. Up to 280 conditions per place. [2025-01-09 16:37:52,172 INFO L140 encePairwiseOnDemand]: 13/18 looper letters, 73 selfloop transitions, 33 changer transitions 0/109 dead transitions. [2025-01-09 16:37:52,172 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 109 transitions, 1154 flow [2025-01-09 16:37:52,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-01-09 16:37:52,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-01-09 16:37:52,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 112 transitions. [2025-01-09 16:37:52,175 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5656565656565656 [2025-01-09 16:37:52,175 INFO L175 Difference]: Start difference. First operand has 80 places, 80 transitions, 735 flow. Second operand 11 states and 112 transitions. [2025-01-09 16:37:52,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 109 transitions, 1154 flow [2025-01-09 16:37:52,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 109 transitions, 1073 flow, removed 29 selfloop flow, removed 5 redundant places. [2025-01-09 16:37:52,184 INFO L231 Difference]: Finished difference. Result has 86 places, 85 transitions, 843 flow [2025-01-09 16:37:52,185 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=646, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=843, PETRI_PLACES=86, PETRI_TRANSITIONS=85} [2025-01-09 16:37:52,186 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 66 predicate places. [2025-01-09 16:37:52,186 INFO L471 AbstractCegarLoop]: Abstraction has has 86 places, 85 transitions, 843 flow [2025-01-09 16:37:52,186 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.416666666666667) internal successors, (89), 12 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:37:52,186 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:37:52,187 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:37:52,192 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-01-09 16:37:52,387 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2025-01-09 16:37:52,388 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-01-09 16:37:52,389 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:37:52,389 INFO L85 PathProgramCache]: Analyzing trace with hash 393833877, now seen corresponding path program 5 times [2025-01-09 16:37:52,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:37:52,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651214870] [2025-01-09 16:37:52,389 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-01-09 16:37:52,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:37:52,393 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 16 statements into 2 equivalence classes. [2025-01-09 16:37:52,400 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-01-09 16:37:52,400 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 16:37:52,400 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:37:52,571 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:37:52,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:37:52,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651214870] [2025-01-09 16:37:52,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651214870] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 16:37:52,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744361756] [2025-01-09 16:37:52,571 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-01-09 16:37:52,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:37:52,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 16:37:52,574 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 16:37:52,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-01-09 16:37:52,596 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 16 statements into 2 equivalence classes. [2025-01-09 16:37:53,171 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-01-09 16:37:53,172 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 16:37:53,172 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:37:53,173 INFO L256 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-01-09 16:37:53,173 INFO L279 TraceCheckSpWp]: Computing forward predicates...